Kubernetes 二进制版本安装 - 1.27.1 docker+docker-cri+calico

设计到的软件包和证书模板

链接：https://pan.baidu.com/s/1ZrUyMqOUFGXBysPvJb8SVw 
提取码：ynr5

一、环境地址

主机名称	IP地址	说明	软件
Master01	192.168.0.31	master节点	kube-apiserver、kube-controller-manager、kube-scheduler、etcd、 kubelet、kube-proxy、nfs-client、haproxy、keepalived、nginx
Master02	192.168.0.32	master节点	kube-apiserver、kube-controller-manager、kube-scheduler、etcd、 kubelet、kube-proxy、nfs-client、haproxy、keepalived、nginx
Master03	192.168.0.33	master节点	kube-apiserver、kube-controller-manager、kube-scheduler、etcd、 kubelet、kube-proxy、nfs-client、haproxy、keepalived、nginx
Node01	192.168.0.34	node节点	kubelet、kube-proxy、nfs-client、nginx
Node02	192.168.0.35	node节点	kubelet、kube-proxy、nfs-client、nginx

二、集群网络信息规划

物理主机：192.168.0.0/24
service：10.96.0.0/12
pod：100.16.0.0/12
域名：kubernetes cluster.local

三、基础环境配置

# 主机名配置	(所有机器节点)

hostnamectl set-hostname k8s-master01
hostnamectl set-hostname k8s-master02
hostnamectl set-hostname k8s-master03
hostnamectl set-hostname k8s-node01
hostnamectl set-hostname k8s-node02

# yum 源配置	(所有机器节点)

sudo sed -e 's|^mirrorlist=|#mirrorlist=|g' \
         -e 's|^#baseurl=http://mirror.centos.org|baseurl=https://mirrors.tuna.tsinghua.edu.cn|g' \
         -i.bak \
         /etc/yum.repos.d/CentOS-*.repo

# 常用软件包安装	(所有机器节点)

yum update -y && yum -y install  wget psmisc vim net-tools nfs-utils telnet yum-utils device-mapper-persistent-data lvm2 git tar curl

# 关闭防火墙	(所有机器节点)

systemctl disable --now firewalld
yum -y install iptables-services
systemctl enable iptables
iptables -F
service iptables save

# 关闭 Selinux	(所有机器节点)

setenforce 0
sed -i 's#SELINUX=enforcing#SELINUX=disabled#g' /etc/selinux/config

# 关闭交换分区	(所有机器节点)

sed -ri 's/.*swap.*/#&/' /etc/fstab
swapoff -a && sysctl -w vm.swappiness=0

cat /etc/fstab
# /dev/mapper/centos-swap swap                    swap    defaults        0 0

# NetworkManager 配置	(所有机器节点)

# 方式一
# systemctl disable --now NetworkManager
# systemctl start network && systemctl enable network

# 方式二
cat > /etc/NetworkManager/conf.d/calico.conf << EOF 
[keyfile]
unmanaged-devices=interface-name:cali*;interface-name:tunl*
EOF
systemctl restart NetworkManager

# 进行时间同步	(第一台机器为 Server 端，其它为 client 端)

# 服务端
# apt install chrony -y
yum install chrony -y
cat > /etc/chrony.conf << EOF 
pool ntp.aliyun.com iburst
driftfile /var/lib/chrony/drift
makestep 1.0 3
rtcsync
allow 192.168.0.0/24
local stratum 10
keyfile /etc/chrony.keys
leapsectz right/UTC
logdir /var/log/chrony
EOF

systemctl restart chronyd ; systemctl enable chronyd

# 客户端
# apt install chrony -y
yum install chrony -y
cat > /etc/chrony.conf << EOF 
pool 192.168.0.31 iburst
driftfile /var/lib/chrony/drift
makestep 1.0 3
rtcsync
keyfile /etc/chrony.keys
leapsectz right/UTC
logdir /var/log/chrony
EOF

systemctl restart chronyd ; systemctl enable chronyd

#使用客户端进行验证
chronyc sources -v

# 配置 ulimit	(所有机器节点)

ulimit -SHn 65535
cat >> /etc/security/limits.conf <<EOF
* soft nofile 655360
* hard nofile 131072
* soft nproc 655350
* hard nproc 655350
* seft memlock unlimited
* hard memlock unlimitedd
EOF

# 配置免密登录	(在 Master01 机器上执行)

# apt install -y sshpass
yum install -y sshpass
ssh-keygen -f /root/.ssh/id_rsa -P ''
export IP="192.168.0.31 192.168.0.32 192.168.0.33 192.168.0.34 192.168.0.35"
export SSHPASS=123123
for HOST in $IP;do
     sshpass -e ssh-copy-id -o StrictHostKeyChecking=no $HOST
done

# 升级内核至 4.18 版本以上	(所有机器节点)

# 为 RHEL-7 SL-7 或 CentOS-7 安装 ELRepo 
yum install https://www.elrepo.org/elrepo-release-7.el7.elrepo.noarch.rpm -y 
sed -i "s@mirrorlist@#mirrorlist@g" /etc/yum.repos.d/elrepo.repo 
sed -i "[email protected]/[email protected]/elrepo@g" /etc/yum.repos.d/elrepo.repo 

# 安装最新的内核
# 我这里选择的是稳定版kernel-ml   如需更新长期维护版本kernel-lt  
yum -y --enablerepo=elrepo-kernel  install  kernel-ml

# 查看已安装那些内核
rpm -qa | grep kernel

# 查看默认内核
grubby --default-kernel

# 若不是最新的使用命令设置
grubby --set-default $(ls /boot/vmlinuz-* | grep elrepo)

# 重启生效
reboot

# 安装 ipvsadm	(所有机器节点)

yum install ipvsadm ipset sysstat conntrack libseccomp -y
cat >> /etc/modules-load.d/ipvs.conf <<EOF 
ip_vs
ip_vs_rr
ip_vs_wrr
ip_vs_sh
nf_conntrack
ip_tables
ip_set
xt_set
ipt_set
ipt_rpfilter
ipt_REJECT
ipip
EOF

systemctl restart systemd-modules-load.service

lsmod | grep -e ip_vs -e nf_conntrack
ip_vs_sh               16384  0
ip_vs_wrr              16384  0
ip_vs_rr               16384  0
ip_vs                 180224  6 ip_vs_rr,ip_vs_sh,ip_vs_wrr
nf_conntrack          176128  1 ip_vs
nf_defrag_ipv6         24576  2 nf_conntrack,ip_vs
nf_defrag_ipv4         16384  1 nf_conntrack
libcrc32c              16384  3 nf_conntrack,xfs,ip_vs

# 修改内核参数	(所有机器节点)
cat <<EOF > /etc/sysctl.d/k8s.conf
net.ipv4.ip_forward = 1
net.bridge.bridge-nf-call-iptables = 1
fs.may_detach_mounts = 1
vm.overcommit_memory=1
vm.panic_on_oom=0
fs.inotify.max_user_watches=89100
fs.file-max=52706963
fs.nr_open=52706963
net.netfilter.nf_conntrack_max=2310720

net.ipv4.tcp_keepalive_time = 600
net.ipv4.tcp_keepalive_probes = 3
net.ipv4.tcp_keepalive_intvl =15
net.ipv4.tcp_max_tw_buckets = 36000
net.ipv4.tcp_tw_reuse = 1
net.ipv4.tcp_max_orphans = 327680
net.ipv4.tcp_orphan_retries = 3
net.ipv4.tcp_syncookies = 1
net.ipv4.tcp_max_syn_backlog = 16384
net.ipv4.ip_conntrack_max = 65536
net.ipv4.tcp_max_syn_backlog = 16384
net.ipv4.tcp_timestamps = 0
net.core.somaxconn = 16384

net.ipv6.conf.all.disable_ipv6 = 0
net.ipv6.conf.default.disable_ipv6 = 0
net.ipv6.conf.lo.disable_ipv6 = 0
net.ipv6.conf.all.forwarding = 1
EOF

sysctl --system

# 所有节点配置 hosts 本地解析	(所有机器节点)

cat > /etc/hosts <<EOF
127.0.0.1   localhost localhost.localdomain localhost4 localhost4.localdomain4
::1         localhost localhost.localdomain localhost6 localhost6.localdomain6


192.168.0.31 k8s-master01
192.168.0.32 k8s-master02
192.168.0.33 k8s-master03
192.168.0.34 k8s-node01
192.168.0.35 k8s-node02
192.168.0.36 lb-vip
EOF

# 工具下载地址（可选使用）
#!/bin/bash

# 查看版本地址：
# 
# https://github.com/containernetworking/plugins/releases/
# https://github.com/containerd/containerd/releases/
# https://github.com/kubernetes-sigs/cri-tools/releases/
# https://github.com/Mirantis/cri-dockerd/releases/
# https://github.com/etcd-io/etcd/releases/
# https://github.com/cloudflare/cfssl/releases/
# https://github.com/kubernetes/kubernetes/tree/master/CHANGELOG
# https://download.docker.com/linux/static/stable/x86_64/
# https://github.com/opencontainers/runc/releases/
# https://mirrors.tuna.tsinghua.edu.cn/elrepo/kernel/el7/x86_64/RPMS/

# Version numbers
kernel_version='5.4.240'
runc_version='1.1.6'
docker_version='23.0.3'
cni_plugins_version='v1.2.0'
cri_containerd_cni_version='1.6.20'
crictl_version='v1.26.1'
cri_dockerd_version='0.3.1'
etcd_version='v3.5.8'
cfssl_version='1.6.4'
helm_version='canary'
kubernetes_server_version='v1.27.1'
nginx_version='1.24.0'

# URLs 
base_url='https://ghproxy.com/https://github.com'
kernel_url="http://mirrors.tuna.tsinghua.edu.cn/elrepo/kernel/el7/x86_64/RPMS/kernel-lt-${kernel_version}-1.el7.elrepo.x86_64.rpm"
runc_url="${base_url}/opencontainers/runc/releases/download/v${runc_version}/runc.amd64"
docker_url="https://download.docker.com/linux/static/stable/x86_64/docker-${docker_version}.tgz"
cni_plugins_url="${base_url}/containernetworking/plugins/releases/download/${cni_plugins_version}/cni-plugins-linux-amd64-${cni_plugins_version}.tgz"
cri_containerd_cni_url="${base_url}/containerd/containerd/releases/download/v${cri_containerd_cni_version}/cri-containerd-cni-${cri_containerd_cni_version}-linux-amd64.tar.gz"
crictl_url="${base_url}/kubernetes-sigs/cri-tools/releases/download/${crictl_version}/crictl-${crictl_version}-linux-amd64.tar.gz"
cri_dockerd_url="${base_url}/Mirantis/cri-dockerd/releases/download/v${cri_dockerd_version}/cri-dockerd-${cri_dockerd_version}.amd64.tgz"
etcd_url="${base_url}/etcd-io/etcd/releases/download/${etcd_version}/etcd-${etcd_version}-linux-amd64.tar.gz"
cfssl_url="${base_url}/cloudflare/cfssl/releases/download/v${cfssl_version}/cfssl_${cfssl_version}_linux_amd64"
cfssljson_url="${base_url}/cloudflare/cfssl/releases/download/v${cfssl_version}/cfssljson_${cfssl_version}_linux_amd64"
helm_url="https://get.helm.sh/helm-${helm_version}-linux-amd64.tar.gz"
kubernetes_server_url="https://dl.k8s.io/${kubernetes_server_version}/kubernetes-server-linux-amd64.tar.gz"
nginx_url="http://nginx.org/download/nginx-${nginx_version}.tar.gz"

# Download packages
packages=(
  $kernel_url
  $runc_url
  $docker_url
  $cni_plugins_url
  $cri_containerd_cni_url
  $crictl_url
  $cri_dockerd_url
  $etcd_url
  $cfssl_url
  $cfssljson_url
  $helm_url
  $kubernetes_server_url
  $nginx_url
)

for package_url in "${packages[@]}"; do
  filename=$(basename "$package_url")
  if wget -cq --progress=bar:force:noscroll -nc "$package_url"; then
    echo "Downloaded $filename"
  else
    echo "Failed to download $filename"
    exit 1
  fi
done

四、Kubernetes 组件安装

注意： 4.1 和 4.2 二选其一即可

4.1 安装 Containerd 作为 Runtime (worker 节点安装即可) (4.1-4.2 二选一)

# wget https://github.com/containernetworking/plugins/releases/download/v1.1.1/cni-plugins-linux-amd64-v1.1.1.tgz

cd kubernetes-v1.26.0/cby/

#创建cni插件所需目录
mkdir -p /etc/cni/net.d /opt/cni/bin 
#解压cni二进制包
tar xf cni-plugins-linux-amd64-v*.tgz -C /opt/cni/bin/

# wget https://github.com/containerd/containerd/releases/download/v1.6.8/cri-containerd-cni-1.6.8-linux-amd64.tar.gz

#解压
tar -xzf cri-containerd-cni-*-linux-amd64.tar.gz -C /

#创建服务启动文件
cat > /etc/systemd/system/containerd.service <<EOF
[Unit]
Description=containerd container runtime
Documentation=https://containerd.io
After=network.target local-fs.target

[Service]
ExecStartPre=-/sbin/modprobe overlay
ExecStart=/usr/local/bin/containerd
Type=notify
Delegate=yes
KillMode=process
Restart=always
RestartSec=5
LimitNPROC=infinity
LimitCORE=infinity
LimitNOFILE=infinity
TasksMax=infinity
OOMScoreAdjust=-999

[Install]
WantedBy=multi-user.target
EOF

# 配置 Containerd 所需的模块

cat <<EOF | sudo tee /etc/modules-load.d/containerd.conf
overlay
br_netfilter
EOF

# 加载模块

systemctl restart systemd-modules-load.service

# 配置 Containerd 所需的内核

cat <<EOF | sudo tee /etc/sysctl.d/99-kubernetes-cri.conf
net.bridge.bridge-nf-call-iptables  = 1
net.ipv4.ip_forward                 = 1
net.bridge.bridge-nf-call-ip6tables = 1
EOF

# 加载内核

sysctl --system

# 创建 Containerd 的配置文件

# 创建默认配置文件
mkdir -p /etc/containerd
containerd config default | tee /etc/containerd/config.toml

# 修改Containerd的配置文件
sed -i "s#SystemdCgroup\ \=\ false#SystemdCgroup\ \=\ true#g" /etc/containerd/config.toml
cat /etc/containerd/config.toml | grep SystemdCgroup

sed -i "s#registry.k8s.io#registry.cn-hangzhou.aliyuncs.com/chenby#g" /etc/containerd/config.toml
cat /etc/containerd/config.toml | grep sandbox_image

sed -i "s#config_path\ \=\ \"\"#config_path\ \=\ \"/etc/containerd/certs.d\"#g" /etc/containerd/config.toml
cat /etc/containerd/config.toml | grep certs.d

mkdir /etc/containerd/certs.d/docker.io -pv

cat > /etc/containerd/certs.d/docker.io/hosts.toml << EOF
server = "https://docker.io"
[host."https://hub-mirror.c.163.com"]
  capabilities = ["pull", "resolve"]
EOF

# 启动并设置为开机启动

systemctl daemon-reload
systemctl enable --now containerd
systemctl restart containerd

# 配置 crictl 客户端连接的运行时位置

# wget https://github.com/kubernetes-sigs/cri-tools/releases/download/v1.24.2/crictl-v1.24.2-linux-amd64.tar.gz

# 解压
tar xf crictl-v*-linux-amd64.tar.gz -C /usr/bin/
# 生成配置文件
cat > /etc/crictl.yaml <<EOF
runtime-endpoint: unix:///run/containerd/containerd.sock
image-endpoint: unix:///run/containerd/containerd.sock
timeout: 10
debug: false
EOF

# 测试
systemctl restart  containerd
crictl info

4.2 安装 docker 作为 Runtime (worker 节点安装即可) (4.1-4.2 二选一)

# 安装  Docker
# 二进制包下载地址：https://download.docker.com/linux/static/stable/x86_64/
# wget https://download.docker.com/linux/static/stable/x86_64/docker-20.10.21.tgz

#解压
tar xf docker-*.tgz 
#拷贝二进制文件
cp docker/* /usr/bin/
#创建containerd的service文件,并且启动
cat >/etc/systemd/system/containerd.service <<EOF
[Unit]
Description=containerd container runtime
Documentation=https://containerd.io
After=network.target local-fs.target


[Service]
ExecStartPre=-/sbin/modprobe overlay
ExecStart=/usr/bin/containerd
Type=notify
Delegate=yes
KillMode=process
Restart=always
RestartSec=5
LimitNPROC=infinity
LimitCORE=infinity
LimitNOFILE=1048576
TasksMax=infinity
OOMScoreAdjust=-999


[Install]
WantedBy=multi-user.target
EOF


systemctl enable --now containerd.service

#准备docker的service文件
cat > /etc/systemd/system/docker.service <<EOF
[Unit]
Description=Docker Application Container Engine
Documentation=https://docs.docker.com
After=network-online.target firewalld.service containerd.service
Wants=network-online.target
Requires=docker.socket containerd.service


[Service]
Type=notify
ExecStart=/usr/bin/dockerd -H fd:// --containerd=/run/containerd/containerd.sock
ExecReload=/bin/kill -s HUP $MAINPID
TimeoutSec=0
RestartSec=2
Restart=always
StartLimitBurst=3
StartLimitInterval=60s
LimitNOFILE=infinity
LimitNPROC=infinity
LimitCORE=infinity
TasksMax=infinity
Delegate=yes
KillMode=process
OOMScoreAdjust=-500


[Install]
WantedBy=multi-user.target
EOF
#准备docker的socket文件
cat > /etc/systemd/system/docker.socket <<EOF
[Unit]
Description=Docker Socket for the API


[Socket]
ListenStream=/var/run/docker.sock
SocketMode=0660
SocketUser=root
SocketGroup=docker


[Install]
WantedBy=sockets.target
EOF

#创建docker组
groupadd docker
#启动docker
systemctl enable --now docker.socket  && systemctl enable --now docker.service
#验证
docker info


cat >/etc/docker/daemon.json <<EOF
{
  "exec-opts": ["native.cgroupdriver=systemd"],
  "registry-mirrors": [
    "https://docker.mirrors.ustc.edu.cn",
    "http://hub-mirror.c.163.com"
  ],
  "max-concurrent-downloads": 10,
  "log-driver": "json-file",
  "log-level": "warn",
  "log-opts": {
    "max-size": "10m",
    "max-file": "3"
    },
  "data-root": "/var/lib/docker"
}
EOF
systemctl restart docker

# 安装 cri-docker

# 由于1.24以及更高版本不支持docker所以安装cri-docker
# 下载cri-docker 
# wget  https://ghproxy.com/https://github.com/Mirantis/cri-dockerd/releases/download/v0.2.5/cri-dockerd-0.2.5.amd64.tgz

# 解压cri-docker
tar xvf cri-dockerd-*.amd64.tgz 
cp -r cri-dockerd/  /usr/bin/
chmod +x /usr/bin/cri-dockerd/cri-dockerd

# 写入启动配置文件
cat >  /usr/lib/systemd/system/cri-docker.service <<EOF
[Unit]
Description=CRI Interface for Docker Application Container Engine
Documentation=https://docs.mirantis.com
After=network-online.target firewalld.service docker.service
Wants=network-online.target
Requires=cri-docker.socket

[Service]
Type=notify
ExecStart=/usr/bin/cri-dockerd/cri-dockerd --network-plugin=cni --pod-infra-container-image=registry.aliyuncs.com/google_containers/pause:3.7
ExecReload=/bin/kill -s HUP $MAINPID
TimeoutSec=0
RestartSec=2
Restart=always

StartLimitBurst=3

StartLimitInterval=60s

LimitNOFILE=infinity
LimitNPROC=infinity
LimitCORE=infinity

TasksMax=infinity
Delegate=yes
KillMode=process

[Install]
WantedBy=multi-user.target
EOF

# 写入socket配置文件
cat > /usr/lib/systemd/system/cri-docker.socket <<EOF
[Unit]
Description=CRI Docker Socket for the API
PartOf=cri-docker.service

[Socket]
ListenStream=%t/cri-dockerd.sock
SocketMode=0660
SocketUser=root
SocketGroup=docker

[Install]
WantedBy=sockets.target
EOF

# 进行启动cri-docker
systemctl daemon-reload ; systemctl enable cri-docker --now

4.3 k8s 与 etcd 下载及安装（仅在 master01 操作）

# 解压 k8s 安装包 （ 仅在 master01 操作 ）

# 下载安装包
# wget https://dl.k8s.io/v1.25.4/kubernetes-server-linux-amd64.tar.gz
# wget https://github.com/etcd-io/etcd/releases/download/v3.5.6/etcd-v3.5.6-linux-amd64.tar.gz

# 解压k8s安装文件
tar -xf kubernetes-server-linux-amd64.tar.gz  --strip-components=3 -C /usr/local/bin kubernetes/server/bin/kube{let,ctl,-apiserver,-controller-manager,-scheduler,-proxy}

# 解压etcd安装文件
tar -xf etcd*.tar.gz && mv etcd-*/etcd /usr/local/bin/ && mv etcd-*/etcdctl /usr/local/bin/

# 查看/usr/local/bin下内容

ls /usr/local/bin/
containerd               crictl       etcdctl                  kube-proxy
containerd-shim          critest      kube-apiserver           kube-scheduler
containerd-shim-runc-v1  ctd-decoder  kube-controller-manager
containerd-shim-runc-v2  ctr          kubectl
containerd-stress        etcd         kubelet

# 查看版本

[root@k8s-master01 ~]#  kubelet --version
Kubernetes v1.27.1
[root@k8s-master01 ~]# etcdctl version
etcdctl version: 3.5.8
API version: 3.5
[root@k8s-master01 ~]#

# 将组件发送至其他 k8s 节点

Master='k8s-master02 k8s-master03'
Work='k8s-node01 k8s-node02'

for NODE in $Master; do echo $NODE; scp /usr/local/bin/kube{let,ctl,-apiserver,-controller-manager,-scheduler,-proxy} $NODE:/usr/local/bin/; scp /usr/local/bin/etcd* $NODE:/usr/local/bin/; done

for NODE in $Work; do     scp /usr/local/bin/kube{let,-proxy} $NODE:/usr/local/bin/ ; done

mkdir -p /opt/cni/bin

# 创建证书相关文件

mkdir pki
cd pki
cat > admin-csr.json << EOF 
{
  "CN": "admin",
  "key": {
    "algo": "rsa",
    "size": 2048
  },
  "names": [
    {
      "C": "CN",
      "ST": "Beijing",
      "L": "Beijing",
      "O": "system:masters",
      "OU": "Kubernetes-manual"
    }
  ]
}
EOF

cat > ca-config.json << EOF 
{
  "signing": {
    "default": {
      "expiry": "876000h"
    },
    "profiles": {
      "kubernetes": {
        "usages": [
            "signing",
            "key encipherment",
            "server auth",
            "client auth"
        ],
        "expiry": "876000h"
      }
    }
  }
}
EOF

cat > etcd-ca-csr.json  << EOF 
{
  "CN": "etcd",
  "key": {
    "algo": "rsa",
    "size": 2048
  },
  "names": [
    {
      "C": "CN",
      "ST": "Beijing",
      "L": "Beijing",
      "O": "etcd",
      "OU": "Etcd Security"
    }
  ],
  "ca": {
    "expiry": "876000h"
  }
}
EOF

cat > front-proxy-ca-csr.json  << EOF 
{
  "CN": "kubernetes",
  "key": {
     "algo": "rsa",
     "size": 2048
  },
  "ca": {
    "expiry": "876000h"
  }
}
EOF

cat > kubelet-csr.json  << EOF 
{
  "CN": "system:node:\$NODE",
  "key": {
    "algo": "rsa",
    "size": 2048
  },
  "names": [
    {
      "C": "CN",
      "L": "Beijing",
      "ST": "Beijing",
      "O": "system:nodes",
      "OU": "Kubernetes-manual"
    }
  ]
}
EOF

cat > manager-csr.json << EOF 
{
  "CN": "system:kube-controller-manager",
  "key": {
    "algo": "rsa",
    "size": 2048
  },
  "names": [
    {
      "C": "CN",
      "ST": "Beijing",
      "L": "Beijing",
      "O": "system:kube-controller-manager",
      "OU": "Kubernetes-manual"
    }
  ]
}
EOF

cat > apiserver-csr.json << EOF 
{
  "CN": "kube-apiserver",
  "key": {
    "algo": "rsa",
    "size": 2048
  },
  "names": [
    {
      "C": "CN",
      "ST": "Beijing",
      "L": "Beijing",
      "O": "Kubernetes",
      "OU": "Kubernetes-manual"
    }
  ]
}
EOF


cat > ca-csr.json   << EOF 
{
  "CN": "kubernetes",
  "key": {
    "algo": "rsa",
    "size": 2048
  },
  "names": [
    {
      "C": "CN",
      "ST": "Beijing",
      "L": "Beijing",
      "O": "Kubernetes",
      "OU": "Kubernetes-manual"
    }
  ],
  "ca": {
    "expiry": "876000h"
  }
}
EOF

cat > etcd-csr.json << EOF 
{
  "CN": "etcd",
  "key": {
    "algo": "rsa",
    "size": 2048
  },
  "names": [
    {
      "C": "CN",
      "ST": "Beijing",
      "L": "Beijing",
      "O": "etcd",
      "OU": "Etcd Security"
    }
  ]
}
EOF


cat > front-proxy-client-csr.json  << EOF 
{
  "CN": "front-proxy-client",
  "key": {
     "algo": "rsa",
     "size": 2048
  }
}
EOF


cat > kube-proxy-csr.json  << EOF 
{
  "CN": "system:kube-proxy",
  "key": {
    "algo": "rsa",
    "size": 2048
  },
  "names": [
    {
      "C": "CN",
      "ST": "Beijing",
      "L": "Beijing",
      "O": "system:kube-proxy",
      "OU": "Kubernetes-manual"
    }
  ]
}
EOF


cat > scheduler-csr.json << EOF 
{
  "CN": "system:kube-scheduler",
  "key": {
    "algo": "rsa",
    "size": 2048
  },
  "names": [
    {
      "C": "CN",
      "ST": "Beijing",
      "L": "Beijing",
      "O": "system:kube-scheduler",
      "OU": "Kubernetes-manual"
    }
  ]
}
EOF

cd ..
mkdir bootstrap
cd bootstrap
cat > bootstrap.secret.yaml << EOF 
apiVersion: v1
kind: Secret
metadata:
  name: bootstrap-token-c8ad9c
  namespace: kube-system
type: bootstrap.kubernetes.io/token
stringData:
  description: "The default bootstrap token generated by 'kubelet '."
  token-id: c8ad9c
  token-secret: 2e4d610cf3e7426e
  usage-bootstrap-authentication: "true"
  usage-bootstrap-signing: "true"
  auth-extra-groups:  system:bootstrappers:default-node-token,system:bootstrappers:worker,system:bootstrappers:ingress
 
---
apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRoleBinding
metadata:
  name: kubelet-bootstrap
roleRef:
  apiGroup: rbac.authorization.k8s.io
  kind: ClusterRole
  name: system:node-bootstrapper
subjects:
- apiGroup: rbac.authorization.k8s.io
  kind: Group
  name: system:bootstrappers:default-node-token
---
apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRoleBinding
metadata:
  name: node-autoapprove-bootstrap
roleRef:
  apiGroup: rbac.authorization.k8s.io
  kind: ClusterRole
  name: system:certificates.k8s.io:certificatesigningrequests:nodeclient
subjects:
- apiGroup: rbac.authorization.k8s.io
  kind: Group
  name: system:bootstrappers:default-node-token
---
apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRoleBinding
metadata:
  name: node-autoapprove-certificate-rotation
roleRef:
  apiGroup: rbac.authorization.k8s.io
  kind: ClusterRole
  name: system:certificates.k8s.io:certificatesigningrequests:selfnodeclient
subjects:
- apiGroup: rbac.authorization.k8s.io
  kind: Group
  name: system:nodes
---
apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRole
metadata:
  annotations:
    rbac.authorization.kubernetes.io/autoupdate: "true"
  labels:
    kubernetes.io/bootstrapping: rbac-defaults
  name: system:kube-apiserver-to-kubelet
rules:
  - apiGroups:
      - ""
    resources:
      - nodes/proxy
      - nodes/stats
      - nodes/log
      - nodes/spec
      - nodes/metrics
    verbs:
      - "*"
---
apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRoleBinding
metadata:
  name: system:kube-apiserver
  namespace: ""
roleRef:
  apiGroup: rbac.authorization.k8s.io
  kind: ClusterRole
  name: system:kube-apiserver-to-kubelet
subjects:
  - apiGroup: rbac.authorization.k8s.io
    kind: User
    name: kube-apiserver
EOF


cd ..
mkdir coredns
cd coredns
cat > coredns.yaml << EOF 
apiVersion: v1
kind: ServiceAccount
metadata:
  name: coredns
  namespace: kube-system
---
apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRole
metadata:
  labels:
    kubernetes.io/bootstrapping: rbac-defaults
  name: system:coredns
rules:
  - apiGroups:
    - ""
    resources:
    - endpoints
    - services
    - pods
    - namespaces
    verbs:
    - list
    - watch
  - apiGroups:
    - discovery.k8s.io
    resources:
    - endpointslices
    verbs:
    - list
    - watch
---
apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRoleBinding
metadata:
  annotations:
    rbac.authorization.kubernetes.io/autoupdate: "true"
  labels:
    kubernetes.io/bootstrapping: rbac-defaults
  name: system:coredns
roleRef:
  apiGroup: rbac.authorization.k8s.io
  kind: ClusterRole
  name: system:coredns
subjects:
- kind: ServiceAccount
  name: coredns
  namespace: kube-system
---
apiVersion: v1
kind: ConfigMap
metadata:
  name: coredns
  namespace: kube-system
data:
  Corefile: |
    .:53 {
        errors
        health {
          lameduck 5s
        }
        ready
        kubernetes cluster.local in-addr.arpa ip6.arpa {
          fallthrough in-addr.arpa ip6.arpa
        }
        prometheus :9153
        forward . /etc/resolv.conf {
          max_concurrent 1000
        }
        cache 30
        loop
        reload
        loadbalance
    }
---
apiVersion: apps/v1
kind: Deployment
metadata:
  name: coredns
  namespace: kube-system
  labels:
    k8s-app: kube-dns
    kubernetes.io/name: "CoreDNS"
spec:
  # replicas: not specified here:
  # 1. Default is 1.
  # 2. Will be tuned in real time if DNS horizontal auto-scaling is turned on.
  strategy:
    type: RollingUpdate
    rollingUpdate:
      maxUnavailable: 1
  selector:
    matchLabels:
      k8s-app: kube-dns
  template:
    metadata:
      labels:
        k8s-app: kube-dns
    spec:
      priorityClassName: system-cluster-critical
      serviceAccountName: coredns
      tolerations:
        - key: "CriticalAddonsOnly"
          operator: "Exists"
      nodeSelector:
        kubernetes.io/os: linux
      affinity:
         podAntiAffinity:
           preferredDuringSchedulingIgnoredDuringExecution:
           - weight: 100
             podAffinityTerm:
               labelSelector:
                 matchExpressions:
                   - key: k8s-app
                     operator: In
                     values: ["kube-dns"]
               topologyKey: kubernetes.io/hostname
      containers:
      - name: coredns
        image: registry.cn-hangzhou.aliyuncs.com/chenby/coredns:v1.10.0
        imagePullPolicy: IfNotPresent
        resources:
          limits:
            memory: 170Mi
          requests:
            cpu: 100m
            memory: 70Mi
        args: [ "-conf", "/etc/coredns/Corefile" ]
        volumeMounts:
        - name: config-volume
          mountPath: /etc/coredns
          readOnly: true
        ports:
        - containerPort: 53
          name: dns
          protocol: UDP
        - containerPort: 53
          name: dns-tcp
          protocol: TCP
        - containerPort: 9153
          name: metrics
          protocol: TCP
        securityContext:
          allowPrivilegeEscalation: false
          capabilities:
            add:
            - NET_BIND_SERVICE
            drop:
            - all
          readOnlyRootFilesystem: true
        livenessProbe:
          httpGet:
            path: /health
            port: 8080
            scheme: HTTP
          initialDelaySeconds: 60
          timeoutSeconds: 5
          successThreshold: 1
          failureThreshold: 5
        readinessProbe:
          httpGet:
            path: /ready
            port: 8181
            scheme: HTTP
      dnsPolicy: Default
      volumes:
        - name: config-volume
          configMap:
            name: coredns
            items:
            - key: Corefile
              path: Corefile
---
apiVersion: v1
kind: Service
metadata:
  name: kube-dns
  namespace: kube-system
  annotations:
    prometheus.io/port: "9153"
    prometheus.io/scrape: "true"
  labels:
    k8s-app: kube-dns
    kubernetes.io/cluster-service: "true"
    kubernetes.io/name: "CoreDNS"
spec:
  selector:
    k8s-app: kube-dns
  clusterIP: 10.96.0.10 
  ports:
  - name: dns
    port: 53
    protocol: UDP
  - name: dns-tcp
    port: 53
    protocol: TCP
  - name: metrics
    port: 9153
    protocol: TCP
EOF


cd ..
mkdir metrics-server
cd metrics-server
cat > metrics-server.yaml << EOF 
apiVersion: v1
kind: ServiceAccount
metadata:
  labels:
    k8s-app: metrics-server
  name: metrics-server
  namespace: kube-system
---
apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRole
metadata:
  labels:
    k8s-app: metrics-server
    rbac.authorization.k8s.io/aggregate-to-admin: "true"
    rbac.authorization.k8s.io/aggregate-to-edit: "true"
    rbac.authorization.k8s.io/aggregate-to-view: "true"
  name: system:aggregated-metrics-reader
rules:
- apiGroups:
  - metrics.k8s.io
  resources:
  - pods
  - nodes
  verbs:
  - get
  - list
  - watch
---
apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRole
metadata:
  labels:
    k8s-app: metrics-server
  name: system:metrics-server
rules:
- apiGroups:
  - ""
  resources:
  - pods
  - nodes
  - nodes/stats
  - namespaces
  - configmaps
  verbs:
  - get
  - list
  - watch
---
apiVersion: rbac.authorization.k8s.io/v1
kind: RoleBinding
metadata:
  labels:
    k8s-app: metrics-server
  name: metrics-server-auth-reader
  namespace: kube-system
roleRef:
  apiGroup: rbac.authorization.k8s.io
  kind: Role
  name: extension-apiserver-authentication-reader
subjects:
- kind: ServiceAccount
  name: metrics-server
  namespace: kube-system
---
apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRoleBinding
metadata:
  labels:
    k8s-app: metrics-server
  name: metrics-server:system:auth-delegator
roleRef:
  apiGroup: rbac.authorization.k8s.io
  kind: ClusterRole
  name: system:auth-delegator
subjects:
- kind: ServiceAccount
  name: metrics-server
  namespace: kube-system
---
apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRoleBinding
metadata:
  labels:
    k8s-app: metrics-server
  name: system:metrics-server
roleRef:
  apiGroup: rbac.authorization.k8s.io
  kind: ClusterRole
  name: system:metrics-server
subjects:
- kind: ServiceAccount
  name: metrics-server
  namespace: kube-system
---
apiVersion: v1
kind: Service
metadata:
  labels:
    k8s-app: metrics-server
  name: metrics-server
  namespace: kube-system
spec:
  ports:
  - name: https
    port: 443
    protocol: TCP
    targetPort: https
  selector:
    k8s-app: metrics-server
---
apiVersion: apps/v1
kind: Deployment
metadata:
  labels:
    k8s-app: metrics-server
  name: metrics-server
  namespace: kube-system
spec:
  selector:
    matchLabels:
      k8s-app: metrics-server
  strategy:
    rollingUpdate:
      maxUnavailable: 0
  template:
    metadata:
      labels:
        k8s-app: metrics-server
    spec:
      containers:
      - args:
        - --cert-dir=/tmp
        - --secure-port=4443
        - --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname
        - --kubelet-use-node-status-port
        - --metric-resolution=15s
        - --kubelet-insecure-tls
        - --requestheader-client-ca-file=/etc/kubernetes/pki/front-proxy-ca.pem # change to front-proxy-ca.crt for kubeadm
        - --requestheader-username-headers=X-Remote-User
        - --requestheader-group-headers=X-Remote-Group
        - --requestheader-extra-headers-prefix=X-Remote-Extra-
        image: registry.cn-hangzhou.aliyuncs.com/chenby/metrics-server:v0.5.2
        imagePullPolicy: IfNotPresent
        livenessProbe:
          failureThreshold: 3
          httpGet:
            path: /livez
            port: https
            scheme: HTTPS
          periodSeconds: 10
        name: metrics-server
        ports:
        - containerPort: 4443
          name: https
          protocol: TCP
        readinessProbe:
          failureThreshold: 3
          httpGet:
            path: /readyz
            port: https
            scheme: HTTPS
          initialDelaySeconds: 20
          periodSeconds: 10
        resources:
          requests:
            cpu: 100m
            memory: 200Mi
        securityContext:
          readOnlyRootFilesystem: true
          runAsNonRoot: true
          runAsUser: 1000
        volumeMounts:
        - mountPath: /tmp
          name: tmp-dir
        - name: ca-ssl
          mountPath: /etc/kubernetes/pki
      nodeSelector:
        kubernetes.io/os: linux
      priorityClassName: system-cluster-critical
      serviceAccountName: metrics-server
      volumes:
      - emptyDir: {}
        name: tmp-dir
      - name: ca-ssl
        hostPath:
          path: /etc/kubernetes/pki

---
apiVersion: apiregistration.k8s.io/v1
kind: APIService
metadata:
  labels:
    k8s-app: metrics-server
  name: v1beta1.metrics.k8s.io
spec:
  group: metrics.k8s.io
  groupPriorityMinimum: 100
  insecureSkipTLSVerify: true
  service:
    name: metrics-server
    namespace: kube-system
  version: v1beta1
  versionPriority: 100
EOF

4.4 相关证书生成

# master01节点下载证书生成工具	( Master01 节点 )

# wget "https://github.com/cloudflare/cfssl/releases/download/v1.6.1/cfssl_1.6.2_linux_amd64" -O /usr/local/bin/cfssl
# wget "https://github.com/cloudflare/cfssl/releases/download/v1.6.1/cfssljson_1.6.2_linux_amd64" -O /usr/local/bin/cfssljson

# 软件包内有
cp cfssl /usr/local/bin/cfssl
cp cfssljson /usr/local/bin/cfssljson

chmod +x /usr/local/bin/cfssl /usr/local/bin/cfssljson

# 特别说明除外，以下操作在所有 master 节点操作	( 所有节点 )

# 所有 master 节点创建证书存放目录
mkdir /etc/etcd/ssl -p

# master01 节点生成 etcd 证书	( Master01 )
cd pki
# 生成etcd证书和etcd证书的key（如果你觉得以后可能会扩容，可以在ip那多写几个预留出来）
# 若没有IPv6 可删除可保留 
cfssl gencert -initca etcd-ca-csr.json | cfssljson -bare /etc/etcd/ssl/etcd-ca
cfssl gencert \
   -ca=/etc/etcd/ssl/etcd-ca.pem \
   -ca-key=/etc/etcd/ssl/etcd-ca-key.pem \
   -config=ca-config.json \
   -hostname=127.0.0.1,k8s-master01,k8s-master02,k8s-master03,192.168.0.31,192.168.0.32,192.168.0.33,fc00:43f4:1eea:1::10,fc00:43f4:1eea:1::20,fc00:43f4:1eea:1::30,::1 \
   -profile=kubernetes \
   etcd-csr.json | cfssljson -bare /etc/etcd/ssl/etcd
   
# 将证书复制到其他节点
Master='k8s-master02 k8s-master03'
for NODE in $Master; do ssh $NODE "mkdir -p /etc/etcd/ssl"; for FILE in etcd-ca-key.pem  etcd-ca.pem  etcd-key.pem  etcd.pem; do scp /etc/etcd/ssl/${FILE} $NODE:/etc/etcd/ssl/${FILE}; done; done

# 生成 k8s 相关证书	( 所有 master 节点 )

# 所有 k8s 节点创建证书存放目录
mkdir -p /etc/kubernetes/pki

# master01 节点生成 k8s 证书
cfssl gencert -initca ca-csr.json | cfssljson -bare /etc/kubernetes/pki/ca

# 生成一个根证书 ，多写了一些IP作为预留IP，为将来添加node做准备
# 10.96.0.1是service网段的第一个地址，需要计算，192.168.0.36为高可用vip地址
# 若没有IPv6 可删除可保留 

cfssl gencert   \
-ca=/etc/kubernetes/pki/ca.pem   \
-ca-key=/etc/kubernetes/pki/ca-key.pem   \
-config=ca-config.json   \
-hostname=10.96.0.1,192.168.0.36,127.0.0.1,kubernetes,kubernetes.default,kubernetes.default.svc,kubernetes.default.svc.cluster,kubernetes.default.svc.cluster.local,x.oiox.cn,k.oiox.cn,l.oiox.cn,o.oiox.cn,192.168.0.31,192.168.0.32,192.168.0.33,192.168.0.34,192.168.0.35,192.168.0.36,192.168.0.37,192.168.0.38,192.168.0.39,192.168.1.70,fc00:43f4:1eea:1::10,fc00:43f4:1eea:1::20,fc00:43f4:1eea:1::30,fc00:43f4:1eea:1::40,fc00:43f4:1eea:1::50,fc00:43f4:1eea:1::60,fc00:43f4:1eea:1::70,fc00:43f4:1eea:1::80,fc00:43f4:1eea:1::90,fc00:43f4:1eea:1::100,::1   \
-profile=kubernetes   apiserver-csr.json | cfssljson -bare /etc/kubernetes/pki/apiserver

# 生成 apiserver 聚合证书

cfssl gencert   -initca front-proxy-ca-csr.json | cfssljson -bare /etc/kubernetes/pki/front-proxy-ca 

# 有一个警告，可以忽略

cfssl gencert  \
-ca=/etc/kubernetes/pki/front-proxy-ca.pem   \
-ca-key=/etc/kubernetes/pki/front-proxy-ca-key.pem   \
-config=ca-config.json   \
-profile=kubernetes   front-proxy-client-csr.json | cfssljson -bare /etc/kubernetes/pki/front-proxy-client

# 生成 controller-manage 的证书

# 选择使用那种高可用方案 若使用 haproxy、keepalived 那么为 --server=https://192.168.0.36:8443 若使用 nginx方案，那么为 --server=https://127.0.0.1:8443

cfssl gencert \
   -ca=/etc/kubernetes/pki/ca.pem \
   -ca-key=/etc/kubernetes/pki/ca-key.pem \
   -config=ca-config.json \
   -profile=kubernetes \
   manager-csr.json | cfssljson -bare /etc/kubernetes/pki/controller-manager

# 设置一个集群项
# 若使用 haproxy、keepalived 那么为 `--server=https://192.168.0.36:8443`
# 若使用 nginx方案，那么为 `--server=https://127.0.0.1:8443`

kubectl config set-cluster kubernetes \
     --certificate-authority=/etc/kubernetes/pki/ca.pem \
     --embed-certs=true \
     --server=https://127.0.0.1:8443 \
     --kubeconfig=/etc/kubernetes/controller-manager.kubeconfig

# 设置一个环境项，一个上下文

kubectl config set-context system:kube-controller-manager@kubernetes \
    --cluster=kubernetes \
    --user=system:kube-controller-manager \
    --kubeconfig=/etc/kubernetes/controller-manager.kubeconfig

# 设置一个用户项

kubectl config set-credentials system:kube-controller-manager \
     --client-certificate=/etc/kubernetes/pki/controller-manager.pem \
     --client-key=/etc/kubernetes/pki/controller-manager-key.pem \
     --embed-certs=true \
     --kubeconfig=/etc/kubernetes/controller-manager.kubeconfig

# 设置默认环境

kubectl config use-context system:kube-controller-manager@kubernetes \
     --kubeconfig=/etc/kubernetes/controller-manager.kubeconfig

cfssl gencert \
   -ca=/etc/kubernetes/pki/ca.pem \
   -ca-key=/etc/kubernetes/pki/ca-key.pem \
   -config=ca-config.json \
   -profile=kubernetes \
   scheduler-csr.json | cfssljson -bare /etc/kubernetes/pki/scheduler

# 在《5.高可用配置》选择使用那种高可用方案
# 若使用 haproxy、keepalived 那么为 `--server=https://192.168.0.36:8443`
# 若使用 nginx方案，那么为 `--server=https://127.0.0.1:8443`

kubectl config set-cluster kubernetes \
     --certificate-authority=/etc/kubernetes/pki/ca.pem \
     --embed-certs=true \
     --server=https://127.0.0.1:8443 \
     --kubeconfig=/etc/kubernetes/scheduler.kubeconfig

kubectl config set-credentials system:kube-scheduler \
     --client-certificate=/etc/kubernetes/pki/scheduler.pem \
     --client-key=/etc/kubernetes/pki/scheduler-key.pem \
     --embed-certs=true \
     --kubeconfig=/etc/kubernetes/scheduler.kubeconfig

kubectl config set-context system:kube-scheduler@kubernetes \
     --cluster=kubernetes \
     --user=system:kube-scheduler \
     --kubeconfig=/etc/kubernetes/scheduler.kubeconfig

kubectl config use-context system:kube-scheduler@kubernetes \
     --kubeconfig=/etc/kubernetes/scheduler.kubeconfig

cfssl gencert \
   -ca=/etc/kubernetes/pki/ca.pem \
   -ca-key=/etc/kubernetes/pki/ca-key.pem \
   -config=ca-config.json \
   -profile=kubernetes \
   admin-csr.json | cfssljson -bare /etc/kubernetes/pki/admin

# 在《5.高可用配置》选择使用那种高可用方案
# 若使用 haproxy、keepalived 那么为 `--server=https://192.168.0.36:8443`
# 若使用 nginx方案，那么为 `--server=https://127.0.0.1:8443`

kubectl config set-cluster kubernetes     \
  --certificate-authority=/etc/kubernetes/pki/ca.pem     \
  --embed-certs=true     \
  --server=https://127.0.0.1:8443     \
  --kubeconfig=/etc/kubernetes/admin.kubeconfig

kubectl config set-credentials kubernetes-admin  \
  --client-certificate=/etc/kubernetes/pki/admin.pem     \
  --client-key=/etc/kubernetes/pki/admin-key.pem     \
  --embed-certs=true     \
  --kubeconfig=/etc/kubernetes/admin.kubeconfig

kubectl config set-context kubernetes-admin@kubernetes    \
  --cluster=kubernetes     \
  --user=kubernetes-admin     \
  --kubeconfig=/etc/kubernetes/admin.kubeconfig

kubectl config use-context kubernetes-admin@kubernetes  --kubeconfig=/etc/kubernetes/admin.kubeconfig

# 创建 kube-proxy 证书

# 选择使用那种高可用方案 若使用 haproxy、keepalived 那么为 --server=https://192.168.0.36:8443 若使用 nginx方案，那么为 --server=https://127.0.0.1:8443

cfssl gencert \
   -ca=/etc/kubernetes/pki/ca.pem \
   -ca-key=/etc/kubernetes/pki/ca-key.pem \
   -config=ca-config.json \
   -profile=kubernetes \
   kube-proxy-csr.json | cfssljson -bare /etc/kubernetes/pki/kube-proxy
   
# 在《5.高可用配置》选择使用那种高可用方案
# 若使用 haproxy、keepalived 那么为 `--server=https://192.168.0.36:8443`
# 若使用 nginx方案，那么为 `--server=https://127.0.0.1:8443`

kubectl config set-cluster kubernetes     \
  --certificate-authority=/etc/kubernetes/pki/ca.pem     \
  --embed-certs=true     \
  --server=https://127.0.0.1:8443     \
  --kubeconfig=/etc/kubernetes/kube-proxy.kubeconfig

kubectl config set-credentials kube-proxy  \
  --client-certificate=/etc/kubernetes/pki/kube-proxy.pem     \
  --client-key=/etc/kubernetes/pki/kube-proxy-key.pem     \
  --embed-certs=true     \
  --kubeconfig=/etc/kubernetes/kube-proxy.kubeconfig

kubectl config set-context kube-proxy@kubernetes    \
  --cluster=kubernetes     \
  --user=kube-proxy     \
  --kubeconfig=/etc/kubernetes/kube-proxy.kubeconfig

kubectl config use-context kube-proxy@kubernetes  --kubeconfig=/etc/kubernetes/kube-proxy.kubeconfig

# 创建 ServiceAccount Key ——secret

openssl genrsa -out /etc/kubernetes/pki/sa.key 2048
openssl rsa -in /etc/kubernetes/pki/sa.key -pubout -out /etc/kubernetes/pki/sa.pub

# 将证书发送到其他 master 节点

#其他节点创建目录
# mkdir  /etc/kubernetes/pki/ -p

for NODE in k8s-master02 k8s-master03; do  for FILE in $(ls /etc/kubernetes/pki | grep -v etcd); do  scp /etc/kubernetes/pki/${FILE} $NODE:/etc/kubernetes/pki/${FILE}; done;  for FILE in admin.kubeconfig controller-manager.kubeconfig scheduler.kubeconfig; do  scp /etc/kubernetes/${FILE} $NODE:/etc/kubernetes/${FILE}; done; done

# 查看证书

ls /etc/kubernetes/pki/
admin.csr          controller-manager.csr      kube-proxy.csr
admin-key.pem      controller-manager-key.pem  kube-proxy-key.pem
admin.pem          controller-manager.pem      kube-proxy.pem
apiserver.csr      front-proxy-ca.csr          sa.key
apiserver-key.pem  front-proxy-ca-key.pem      sa.pub
apiserver.pem      front-proxy-ca.pem          scheduler.csr
ca.csr             front-proxy-client.csr      scheduler-key.pem
ca-key.pem         front-proxy-client-key.pem  scheduler.pem
ca.pem             front-proxy-client.pem

# 一共26个就对了
ls /etc/kubernetes/pki/ |wc -l
26

4.5 k8s 系统组件配置

etcd 配置

# master01 配置

# 如果要用IPv6那么把IPv4地址修改为IPv6即可
cat > /etc/etcd/etcd.config.yml << EOF 
name: 'k8s-master01'
data-dir: /var/lib/etcd
wal-dir: /var/lib/etcd/wal
snapshot-count: 5000
heartbeat-interval: 100
election-timeout: 1000
quota-backend-bytes: 0
listen-peer-urls: 'https://192.168.0.31:2380'
listen-client-urls: 'https://192.168.0.31:2379,http://127.0.0.1:2379'
max-snapshots: 3
max-wals: 5
cors:
initial-advertise-peer-urls: 'https://192.168.0.31:2380'
advertise-client-urls: 'https://192.168.0.31:2379'
discovery:
discovery-fallback: 'proxy'
discovery-proxy:
discovery-srv:
initial-cluster: 'k8s-master01=https://192.168.0.31:2380,k8s-master02=https://192.168.0.32:2380,k8s-master03=https://192.168.0.33:2380'
initial-cluster-token: 'etcd-k8s-cluster'
initial-cluster-state: 'new'
strict-reconfig-check: false
enable-v2: true
enable-pprof: true
proxy: 'off'
proxy-failure-wait: 5000
proxy-refresh-interval: 30000
proxy-dial-timeout: 1000
proxy-write-timeout: 5000
proxy-read-timeout: 0
client-transport-security:
  cert-file: '/etc/kubernetes/pki/etcd/etcd.pem'
  key-file: '/etc/kubernetes/pki/etcd/etcd-key.pem'
  client-cert-auth: true
  trusted-ca-file: '/etc/kubernetes/pki/etcd/etcd-ca.pem'
  auto-tls: true
peer-transport-security:
  cert-file: '/etc/kubernetes/pki/etcd/etcd.pem'
  key-file: '/etc/kubernetes/pki/etcd/etcd-key.pem'
  peer-client-cert-auth: true
  trusted-ca-file: '/etc/kubernetes/pki/etcd/etcd-ca.pem'
  auto-tls: true
debug: false
log-package-levels:
log-outputs: [default]
force-new-cluster: false
EOF

# master02 配置

# 如果要用IPv6那么把IPv4地址修改为IPv6即可
cat > /etc/etcd/etcd.config.yml << EOF 
name: 'k8s-master02'
data-dir: /var/lib/etcd
wal-dir: /var/lib/etcd/wal
snapshot-count: 5000
heartbeat-interval: 100
election-timeout: 1000
quota-backend-bytes: 0
listen-peer-urls: 'https://192.168.0.32:2380'
listen-client-urls: 'https://192.168.0.32:2379,http://127.0.0.1:2379'
max-snapshots: 3
max-wals: 5
cors:
initial-advertise-peer-urls: 'https://192.168.0.32:2380'
advertise-client-urls: 'https://192.168.0.32:2379'
discovery:
discovery-fallback: 'proxy'
discovery-proxy:
discovery-srv:
initial-cluster: 'k8s-master01=https://192.168.0.31:2380,k8s-master02=https://192.168.0.32:2380,k8s-master03=https://192.168.0.33:2380'
initial-cluster-token: 'etcd-k8s-cluster'
initial-cluster-state: 'new'
strict-reconfig-check: false
enable-v2: true
enable-pprof: true
proxy: 'off'
proxy-failure-wait: 5000
proxy-refresh-interval: 30000
proxy-dial-timeout: 1000
proxy-write-timeout: 5000
proxy-read-timeout: 0
client-transport-security:
  cert-file: '/etc/kubernetes/pki/etcd/etcd.pem'
  key-file: '/etc/kubernetes/pki/etcd/etcd-key.pem'
  client-cert-auth: true
  trusted-ca-file: '/etc/kubernetes/pki/etcd/etcd-ca.pem'
  auto-tls: true
peer-transport-security:
  cert-file: '/etc/kubernetes/pki/etcd/etcd.pem'
  key-file: '/etc/kubernetes/pki/etcd/etcd-key.pem'
  peer-client-cert-auth: true
  trusted-ca-file: '/etc/kubernetes/pki/etcd/etcd-ca.pem'
  auto-tls: true
debug: false
log-package-levels:
log-outputs: [default]
force-new-cluster: false
EOF

# master03 配置

# 如果要用IPv6那么把IPv4地址修改为IPv6即可
cat > /etc/etcd/etcd.config.yml << EOF 
name: 'k8s-master03'
data-dir: /var/lib/etcd
wal-dir: /var/lib/etcd/wal
snapshot-count: 5000
heartbeat-interval: 100
election-timeout: 1000
quota-backend-bytes: 0
listen-peer-urls: 'https://192.168.0.33:2380'
listen-client-urls: 'https://192.168.0.33:2379,http://127.0.0.1:2379'
max-snapshots: 3
max-wals: 5
cors:
initial-advertise-peer-urls: 'https://192.168.0.33:2380'
advertise-client-urls: 'https://192.168.0.33:2379'
discovery:
discovery-fallback: 'proxy'
discovery-proxy:
discovery-srv:
initial-cluster: 'k8s-master01=https://192.168.0.31:2380,k8s-master02=https://192.168.0.32:2380,k8s-master03=https://192.168.0.33:2380'
initial-cluster-token: 'etcd-k8s-cluster'
initial-cluster-state: 'new'
strict-reconfig-check: false
enable-v2: true
enable-pprof: true
proxy: 'off'
proxy-failure-wait: 5000
proxy-refresh-interval: 30000
proxy-dial-timeout: 1000
proxy-write-timeout: 5000
proxy-read-timeout: 0
client-transport-security:
  cert-file: '/etc/kubernetes/pki/etcd/etcd.pem'
  key-file: '/etc/kubernetes/pki/etcd/etcd-key.pem'
  client-cert-auth: true
  trusted-ca-file: '/etc/kubernetes/pki/etcd/etcd-ca.pem'
  auto-tls: true
peer-transport-security:
  cert-file: '/etc/kubernetes/pki/etcd/etcd.pem'
  key-file: '/etc/kubernetes/pki/etcd/etcd-key.pem'
  peer-client-cert-auth: true
  trusted-ca-file: '/etc/kubernetes/pki/etcd/etcd-ca.pem'
  auto-tls: true
debug: false
log-package-levels:
log-outputs: [default]
force-new-cluster: false
EOF

# 创建 service（ 所有 master 节点操作 ）

# 创建 etcd.service 并启动
cat > /usr/lib/systemd/system/etcd.service << EOF

[Unit]
Description=Etcd Service
Documentation=https://coreos.com/etcd/docs/latest/
After=network.target

[Service]
Type=notify
ExecStart=/usr/local/bin/etcd --config-file=/etc/etcd/etcd.config.yml
Restart=on-failure
RestartSec=10
LimitNOFILE=65536

[Install]
WantedBy=multi-user.target
Alias=etcd3.service

EOF


# 创建 etcd 证书目录
mkdir /etc/kubernetes/pki/etcd
ln -s /etc/etcd/ssl/* /etc/kubernetes/pki/etcd/
systemctl daemon-reload
systemctl enable --now etcd

# 查看 etcd 状态
# 如果要用IPv6那么把IPv4地址修改为IPv6即可
export ETCDCTL_API=3
etcdctl --endpoints="192.168.0.33:2379,192.168.0.32:2379,192.168.0.31:2379" --cacert=/etc/kubernetes/pki/etcd/etcd-ca.pem --cert=/etc/kubernetes/pki/etcd/etcd.pem --key=/etc/kubernetes/pki/etcd/etcd-key.pem  endpoint status --write-out=table
+-----------------+------------------+---------+---------+-----------+------------+-----------+------------+--------------------+--------+
|    ENDPOINT     |        ID        | VERSION | DB SIZE | IS LEADER | IS LEARNER | RAFT TERM | RAFT INDEX | RAFT APPLIED INDEX | ERRORS |
+-----------------+------------------+---------+---------+-----------+------------+-----------+------------+--------------------+--------+
| 192.168.0.33:2379 | d58e37898979ae63 |   3.5.7 |   20 kB |     false |      false |         2 |          8 |                  8 |        |
| 192.168.0.32:2379 | ec6b15415e24cb42 |   3.5.7 |   20 kB |     false |      false |         2 |          8 |                  8 |        |
| 192.168.0.31:2379 | 5e5cf1ca5cb2d291 |   3.5.7 |   20 kB |      true |      false |         2 |          8 |                  8 |        |
+-----------------+------------------+---------+---------+-----------+------------+-----------+------------+--------------------+--------+
[root@k8s-master01 pki]#

4.6 高可用配置

Nginx 高可用方案（与 haproxy 方案二选一）（在所有节点执行）

# 安装编译环境
yum install gcc -y

# 下载解压nginx二进制文件
# wget http://nginx.org/download/nginx-1.22.1.tar.gz
tar xvf nginx-*.tar.gz
cd nginx-*

# 进行编译
./configure --with-stream --without-http --without-http_uwsgi_module --without-http_scgi_module --without-http_fastcgi_module
make && make install 

# 拷贝编译好的nginx
node='k8s-master02 k8s-master03 k8s-node01 k8s-node02'
for NODE in $node; do scp -r /usr/local/nginx/ $NODE:/usr/local/nginx/; done

# 写入启动配置

# 写入nginx配置文件
cat > /usr/local/nginx/conf/kube-nginx.conf <<EOF
worker_processes 1;
events {
    worker_connections  1024;
}
stream {
    upstream backend {
    	least_conn;
        hash $remote_addr consistent;
        server 192.168.0.31:6443        max_fails=3 fail_timeout=30s;
        server 192.168.0.32:6443        max_fails=3 fail_timeout=30s;
        server 192.168.0.33:6443        max_fails=3 fail_timeout=30s;
    }
    server {
        listen 127.0.0.1:8443;
        proxy_connect_timeout 1s;
        proxy_pass backend;
    }
}
EOF

# 写入启动配置文件
cat > /etc/systemd/system/kube-nginx.service <<EOF
[Unit]
Description=kube-apiserver nginx proxy
After=network.target
After=network-online.target
Wants=network-online.target

[Service]
Type=forking
ExecStartPre=/usr/local/nginx/sbin/nginx -c /usr/local/nginx/conf/kube-nginx.conf -p /usr/local/nginx -t
ExecStart=/usr/local/nginx/sbin/nginx -c /usr/local/nginx/conf/kube-nginx.conf -p /usr/local/nginx
ExecReload=/usr/local/nginx/sbin/nginx -c /usr/local/nginx/conf/kube-nginx.conf -p /usr/local/nginx -s reload
PrivateTmp=true
Restart=always
RestartSec=5
StartLimitInterval=0
LimitNOFILE=65536
 
[Install]
WantedBy=multi-user.target
EOF

# 设置开机自启
systemctl enable --now  kube-nginx 
systemctl restart kube-nginx
systemctl status kube-nginx

4.7 k8s 组件配置

创建 apiserver（所有master节点）

# 所有 k8s 节点创建以下目录

mkdir -p /etc/kubernetes/manifests/ /etc/systemd/system/kubelet.service.d /var/lib/kubelet /var/log/kubernetes

# 创建 apiserver（所有master节点）

# master01节点配置
cat > /usr/lib/systemd/system/kube-apiserver.service << EOF

[Unit]
Description=Kubernetes API Server
Documentation=https://github.com/kubernetes/kubernetes
After=network.target

[Service]
ExecStart=/usr/local/bin/kube-apiserver \\
      --v=2  \\
      --allow-privileged=true  \\
      --bind-address=0.0.0.0  \\
      --secure-port=6443  \\
      --advertise-address=192.168.0.31 \\
      --service-cluster-ip-range=10.96.0.0/12,fd00:1111::/112  \\
      --service-node-port-range=30000-32767  \\
      --etcd-servers=https://192.168.0.31:2379,https://192.168.0.32:2379,https://192.168.0.33:2379 \\
      --etcd-cafile=/etc/etcd/ssl/etcd-ca.pem  \\
      --etcd-certfile=/etc/etcd/ssl/etcd.pem  \\
      --etcd-keyfile=/etc/etcd/ssl/etcd-key.pem  \\
      --client-ca-file=/etc/kubernetes/pki/ca.pem  \\
      --tls-cert-file=/etc/kubernetes/pki/apiserver.pem  \\
      --tls-private-key-file=/etc/kubernetes/pki/apiserver-key.pem  \\
      --kubelet-client-certificate=/etc/kubernetes/pki/apiserver.pem  \\
      --kubelet-client-key=/etc/kubernetes/pki/apiserver-key.pem  \\
      --service-account-key-file=/etc/kubernetes/pki/sa.pub  \\
      --service-account-signing-key-file=/etc/kubernetes/pki/sa.key  \\
      --service-account-issuer=https://kubernetes.default.svc.cluster.local \\
      --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname  \\
      --enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,NodeRestriction,ResourceQuota  \
      --authorization-mode=Node,RBAC  \\
      --enable-bootstrap-token-auth=true  \\
      --requestheader-client-ca-file=/etc/kubernetes/pki/front-proxy-ca.pem  \\
      --proxy-client-cert-file=/etc/kubernetes/pki/front-proxy-client.pem  \\
      --proxy-client-key-file=/etc/kubernetes/pki/front-proxy-client-key.pem  \\
      --requestheader-allowed-names=aggregator  \\
      --requestheader-group-headers=X-Remote-Group  \\
      --requestheader-extra-headers-prefix=X-Remote-Extra-  \\
      --requestheader-username-headers=X-Remote-User \\
      --enable-aggregator-routing=true
      # --feature-gates=IPv6DualStack=true
      # --token-auth-file=/etc/kubernetes/token.csv

Restart=on-failure
RestartSec=10s
LimitNOFILE=65535

[Install]
WantedBy=multi-user.target

EOF

# master02节点配置

cat > /usr/lib/systemd/system/kube-apiserver.service << EOF
[Unit]
Description=Kubernetes API Server
Documentation=https://github.com/kubernetes/kubernetes
After=network.target

[Service]
ExecStart=/usr/local/bin/kube-apiserver \\
      --v=2  \\
      --allow-privileged=true  \\
      --bind-address=0.0.0.0  \\
      --secure-port=6443  \\
      --advertise-address=192.168.0.32 \\
      --service-cluster-ip-range=10.96.0.0/12,fd00:1111::/112  \\
      --service-node-port-range=30000-32767  \\
      --etcd-servers=https://192.168.0.31:2379,https://192.168.0.32:2379,https://192.168.0.33:2379 \\
      --etcd-cafile=/etc/etcd/ssl/etcd-ca.pem  \\
      --etcd-certfile=/etc/etcd/ssl/etcd.pem  \\
      --etcd-keyfile=/etc/etcd/ssl/etcd-key.pem  \\
      --client-ca-file=/etc/kubernetes/pki/ca.pem  \\
      --tls-cert-file=/etc/kubernetes/pki/apiserver.pem  \\
      --tls-private-key-file=/etc/kubernetes/pki/apiserver-key.pem  \\
      --kubelet-client-certificate=/etc/kubernetes/pki/apiserver.pem  \\
      --kubelet-client-key=/etc/kubernetes/pki/apiserver-key.pem  \\
      --service-account-key-file=/etc/kubernetes/pki/sa.pub  \\
      --service-account-signing-key-file=/etc/kubernetes/pki/sa.key  \\
      --service-account-issuer=https://kubernetes.default.svc.cluster.local \\
      --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname  \\
      --enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,NodeRestriction,ResourceQuota  \\
      --authorization-mode=Node,RBAC  \\
      --enable-bootstrap-token-auth=true  \\
      --requestheader-client-ca-file=/etc/kubernetes/pki/front-proxy-ca.pem  \\
      --proxy-client-cert-file=/etc/kubernetes/pki/front-proxy-client.pem  \\
      --proxy-client-key-file=/etc/kubernetes/pki/front-proxy-client-key.pem  \\
      --requestheader-allowed-names=aggregator  \\
      --requestheader-group-headers=X-Remote-Group  \\
      --requestheader-extra-headers-prefix=X-Remote-Extra-  \\
      --requestheader-username-headers=X-Remote-User \\
      --enable-aggregator-routing=true
      # --feature-gates=IPv6DualStack=true
      # --token-auth-file=/etc/kubernetes/token.csv

Restart=on-failure
RestartSec=10s
LimitNOFILE=65535

[Install]
WantedBy=multi-user.target

EOF

# master03 节点配置

cat > /usr/lib/systemd/system/kube-apiserver.service  << EOF

[Unit]
Description=Kubernetes API Server
Documentation=https://github.com/kubernetes/kubernetes
After=network.target

[Service]
ExecStart=/usr/local/bin/kube-apiserver \\
      --v=2  \\
      --allow-privileged=true  \\
      --bind-address=0.0.0.0  \\
      --secure-port=6443  \\
      --advertise-address=192.168.0.33 \\
      --service-cluster-ip-range=10.96.0.0/12,fd00:1111::/112  \\
      --service-node-port-range=30000-32767  \\
      --etcd-servers=https://192.168.0.31:2379,https://192.168.0.32:2379,https://192.168.0.33:2379 \\
      --etcd-cafile=/etc/etcd/ssl/etcd-ca.pem  \\
      --etcd-certfile=/etc/etcd/ssl/etcd.pem  \\
      --etcd-keyfile=/etc/etcd/ssl/etcd-key.pem  \\
      --client-ca-file=/etc/kubernetes/pki/ca.pem  \\
      --tls-cert-file=/etc/kubernetes/pki/apiserver.pem  \\
      --tls-private-key-file=/etc/kubernetes/pki/apiserver-key.pem  \\
      --kubelet-client-certificate=/etc/kubernetes/pki/apiserver.pem  \\
      --kubelet-client-key=/etc/kubernetes/pki/apiserver-key.pem  \\
      --service-account-key-file=/etc/kubernetes/pki/sa.pub  \\
      --service-account-signing-key-file=/etc/kubernetes/pki/sa.key  \\
      --service-account-issuer=https://kubernetes.default.svc.cluster.local \\
      --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname  \\
      --enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,NodeRestriction,ResourceQuota  \\
      --authorization-mode=Node,RBAC  \\
      --enable-bootstrap-token-auth=true  \\
      --requestheader-client-ca-file=/etc/kubernetes/pki/front-proxy-ca.pem  \\
      --proxy-client-cert-file=/etc/kubernetes/pki/front-proxy-client.pem  \\
      --proxy-client-key-file=/etc/kubernetes/pki/front-proxy-client-key.pem  \\
      --requestheader-allowed-names=aggregator  \\
      --requestheader-group-headers=X-Remote-Group  \\
      --requestheader-extra-headers-prefix=X-Remote-Extra-  \\
      --requestheader-username-headers=X-Remote-User \\
      --enable-aggregator-routing=true
      # --feature-gates=IPv6DualStack=true
      # --token-auth-file=/etc/kubernetes/token.csv

Restart=on-failure
RestartSec=10s
LimitNOFILE=65535

[Install]
WantedBy=multi-user.target

EOF

# 启动 apiserver（所有master节点）
systemctl daemon-reload && systemctl enable --now kube-apiserver

# 注意查看状态是否启动正常
# systemctl status kube-apiserver

配置 kube-controller-manager service

# 所有master节点配置，且配置相同
# 172.16.0.0/12为pod网段，按需求设置你自己的网段

cat > /usr/lib/systemd/system/kube-controller-manager.service << EOF

[Unit]
Description=Kubernetes Controller Manager
Documentation=https://github.com/kubernetes/kubernetes
After=network.target

[Service]
ExecStart=/usr/local/bin/kube-controller-manager \\
      --v=2 \\
      --bind-address=0.0.0.0 \\
      --root-ca-file=/etc/kubernetes/pki/ca.pem \\
      --cluster-signing-cert-file=/etc/kubernetes/pki/ca.pem \\
      --cluster-signing-key-file=/etc/kubernetes/pki/ca-key.pem \\
      --service-account-private-key-file=/etc/kubernetes/pki/sa.key \\
      --kubeconfig=/etc/kubernetes/controller-manager.kubeconfig \\
      --leader-elect=true \\
      --use-service-account-credentials=true \\
      --node-monitor-grace-period=40s \\
      --node-monitor-period=5s \\
      --controllers=*,bootstrapsigner,tokencleaner \\
      --allocate-node-cidrs=true \\
      --service-cluster-ip-range=10.96.0.0/12,fd00:1111::/112 \\
      --cluster-cidr=172.16.0.0/12,fc00:2222::/112 \\
      --node-cidr-mask-size-ipv4=24 \\
      --node-cidr-mask-size-ipv6=120 \\
      --requestheader-client-ca-file=/etc/kubernetes/pki/front-proxy-ca.pem 
      # --feature-gates=IPv6DualStack=true

Restart=always
RestartSec=10s

[Install]
WantedBy=multi-user.target

EOF

# 启动 kube-controller-manager，并查看状态

systemctl daemon-reload
systemctl enable --now kube-controller-manager
# systemctl  status kube-controller-manager

配置 kube-scheduler service

# 所有master节点配置，且配置相同

cat > /usr/lib/systemd/system/kube-scheduler.service << EOF

[Unit]
Description=Kubernetes Scheduler
Documentation=https://github.com/kubernetes/kubernetes
After=network.target

[Service]
ExecStart=/usr/local/bin/kube-scheduler \\
      --v=2 \\
      --bind-address=0.0.0.0 \\
      --leader-elect=true \\
      --kubeconfig=/etc/kubernetes/scheduler.kubeconfig

Restart=always
RestartSec=10s

[Install]
WantedBy=multi-user.target

EOF

# 启动并查看服务状态

systemctl daemon-reload
systemctl enable --now kube-scheduler
# systemctl status kube-scheduler

五、TLS Bootstrapping 配置

# 在 master01 上配置

# 在《5.高可用配置》选择使用那种高可用方案
# 若使用 haproxy、keepalived 那么为 `--server=https://192.168.0.36:8443`
# 若使用 nginx方案，那么为 `--server=https://127.0.0.1:8443`

cd bootstrap

kubectl config set-cluster kubernetes     \
--certificate-authority=/etc/kubernetes/pki/ca.pem     \
--embed-certs=true     --server=https://127.0.0.1:8443     \
--kubeconfig=/etc/kubernetes/bootstrap-kubelet.kubeconfig

kubectl config set-credentials tls-bootstrap-token-user     \
--token=c8ad9c.2e4d610cf3e7426e \
--kubeconfig=/etc/kubernetes/bootstrap-kubelet.kubeconfig

kubectl config set-context tls-bootstrap-token-user@kubernetes     \
--cluster=kubernetes     \
--user=tls-bootstrap-token-user     \
--kubeconfig=/etc/kubernetes/bootstrap-kubelet.kubeconfig

kubectl config use-context tls-bootstrap-token-user@kubernetes     \
--kubeconfig=/etc/kubernetes/bootstrap-kubelet.kubeconfig

# token的位置在bootstrap.secret.yaml，如果修改的话到这个文件修改
mkdir -p /root/.kube ; cp /etc/kubernetes/admin.kubeconfig /root/.kube/config

# 查看集群状态，没问题的话继续后续操作

kubectl get cs
Warning: v1 ComponentStatus is deprecated in v1.19+
NAME                 STATUS    MESSAGE                         ERROR
scheduler            Healthy   ok                              
controller-manager   Healthy   ok                              
etcd-0               Healthy   {"health":"true","reason":""}   
etcd-2               Healthy   {"health":"true","reason":""}   
etcd-1               Healthy   {"health":"true","reason":""} 

# 切记执行，别忘记！！！
kubectl create -f bootstrap.secret.yaml

六、node 节点配置

# 在 master01 上将证书复制到 node 节点

cd /etc/kubernetes/
 
for NODE in k8s-master02 k8s-master03 k8s-node01 k8s-node02; do ssh $NODE mkdir -p /etc/kubernetes/pki; for FILE in pki/ca.pem pki/ca-key.pem pki/front-proxy-ca.pem bootstrap-kubelet.kubeconfig kube-proxy.kubeconfig; do scp /etc/kubernetes/$FILE $NODE:/etc/kubernetes/${FILE}; done; done

# kubelet 配置  (与下方二选一)
# 当使用 docker 作为 Runtime

cat > /usr/lib/systemd/system/kubelet.service << EOF

[Unit]
Description=Kubernetes Kubelet
Documentation=https://github.com/kubernetes/kubernetes

[Service]
ExecStart=/usr/local/bin/kubelet \\
    --bootstrap-kubeconfig=/etc/kubernetes/bootstrap-kubelet.kubeconfig  \\
    --kubeconfig=/etc/kubernetes/kubelet.kubeconfig \\
    --config=/etc/kubernetes/kubelet-conf.yml \\
    --container-runtime-endpoint=unix:///run/cri-dockerd.sock  \\
    --node-labels=node.kubernetes.io/node=

[Install]
WantedBy=multi-user.target
EOF

# 当使用 Containerd 作为 Runtime （与上方二选一）

mkdir -p /var/lib/kubelet /var/log/kubernetes /etc/systemd/system/kubelet.service.d /etc/kubernetes/manifests/

# 所有k8s节点配置kubelet service
cat > /usr/lib/systemd/system/kubelet.service << EOF

[Unit]
Description=Kubernetes Kubelet
Documentation=https://github.com/kubernetes/kubernetes
After=containerd.service
Requires=containerd.service

[Service]
ExecStart=/usr/local/bin/kubelet \\
    --bootstrap-kubeconfig=/etc/kubernetes/bootstrap-kubelet.kubeconfig  \\
    --kubeconfig=/etc/kubernetes/kubelet.kubeconfig \\
    --config=/etc/kubernetes/kubelet-conf.yml \\
    --container-runtime-endpoint=unix:///run/containerd/containerd.sock  \\
    --node-labels=node.kubernetes.io/node=
    # --feature-gates=IPv6DualStack=true
    # --container-runtime=remote
    # --runtime-request-timeout=15m
    # --cgroup-driver=systemd

[Install]
WantedBy=multi-user.target
EOF

# 所有 k8s 节点创建 kubelet 的配置文件

cat > /etc/kubernetes/kubelet-conf.yml <<EOF
apiVersion: kubelet.config.k8s.io/v1beta1
kind: KubeletConfiguration
address: 0.0.0.0
port: 10250
readOnlyPort: 10255
authentication:
  anonymous:
    enabled: false
  webhook:
    cacheTTL: 2m0s
    enabled: true
  x509:
    clientCAFile: /etc/kubernetes/pki/ca.pem
authorization:
  mode: Webhook
  webhook:
    cacheAuthorizedTTL: 5m0s
    cacheUnauthorizedTTL: 30s
cgroupDriver: systemd
cgroupsPerQOS: true
clusterDNS:
- 10.96.0.10
clusterDomain: cluster.local
containerLogMaxFiles: 5
containerLogMaxSize: 10Mi
contentType: application/vnd.kubernetes.protobuf
cpuCFSQuota: true
cpuManagerPolicy: none
cpuManagerReconcilePeriod: 10s
enableControllerAttachDetach: true
enableDebuggingHandlers: true
enforceNodeAllocatable:
- pods
eventBurst: 10
eventRecordQPS: 5
evictionHard:
  imagefs.available: 15%
  memory.available: 100Mi
  nodefs.available: 10%
  nodefs.inodesFree: 5%
evictionPressureTransitionPeriod: 5m0s
failSwapOn: true
fileCheckFrequency: 20s
hairpinMode: promiscuous-bridge
healthzBindAddress: 127.0.0.1
healthzPort: 10248
httpCheckFrequency: 20s
imageGCHighThresholdPercent: 85
imageGCLowThresholdPercent: 80
imageMinimumGCAge: 2m0s
iptablesDropBit: 15
iptablesMasqueradeBit: 14
kubeAPIBurst: 10
kubeAPIQPS: 5
makeIPTablesUtilChains: true
maxOpenFiles: 1000000
maxPods: 110
nodeStatusUpdateFrequency: 10s
oomScoreAdj: -999
podPidsLimit: -1
registryBurst: 10
registryPullQPS: 5
resolvConf: /etc/resolv.conf
rotateCertificates: true
runtimeRequestTimeout: 2m0s
serializeImagePulls: true
staticPodPath: /etc/kubernetes/manifests
streamingConnectionIdleTimeout: 4h0m0s
syncFrequency: 1m0s
volumeStatsAggPeriod: 1m0s
EOF

# 启动 kubelet

systemctl daemon-reload
systemctl restart kubelet
systemctl enable --now kubelet

# 查看集群

[root@k8s-master01 ~]# kubectl  get node
NAME           STATUS     ROLES    AGE   VERSION
k8s-master01   Ready    <none>   18s   v1.27.1
k8s-master02   Ready    <none>   16s   v1.27.1
k8s-master03   Ready    <none>   16s   v1.27.1
k8s-node01     Ready    <none>   14s   v1.27.1
k8s-node02     Ready    <none>   14s   v1.27.1
[root@k8s-master01 ~]#

# 查看容器运行时

[root@k8s-master01 ~]# kubectl describe node | grep Runtime
  Container Runtime Version:  containerd://1.6.20
  Container Runtime Version:  containerd://1.6.20
  Container Runtime Version:  containerd://1.6.20
  Container Runtime Version:  containerd://1.6.20
  Container Runtime Version:  containerd://1.6.20
[root@k8s-master01 ~]# kubectl describe node | grep Runtime
  Container Runtime Version:  docker://23.0.3
  Container Runtime Version:  docker://23.0.3
  Container Runtime Version:  docker://23.0.3
  Container Runtime Version:  docker://23.0.3
  Container Runtime Version:  docker://23.0.3

# kube-proxy 配置

# 将 kubeconfig 发送至其他节点
for NODE in k8s-master02 k8s-master03; do scp /etc/kubernetes/kube-proxy.kubeconfig $NODE:/etc/kubernetes/kube-proxy.kubeconfig; done

for NODE in k8s-node01 k8s-node02; do scp /etc/kubernetes/kube-proxy.kubeconfig $NODE:/etc/kubernetes/kube-proxy.kubeconfig;  done

# 所有 k8s 节点添加 kube-proxy 的 service 文件
cat >  /usr/lib/systemd/system/kube-proxy.service << EOF
[Unit]
Description=Kubernetes Kube Proxy
Documentation=https://github.com/kubernetes/kubernetes
After=network.target

[Service]
ExecStart=/usr/local/bin/kube-proxy \\
  --config=/etc/kubernetes/kube-proxy.yaml \\
  --v=2

Restart=always
RestartSec=10s

[Install]
WantedBy=multi-user.target

EOF

# 所有 k8s 节点添加 kube-proxy 的配置

cat > /etc/kubernetes/kube-proxy.yaml << EOF
apiVersion: kubeproxy.config.k8s.io/v1alpha1
bindAddress: 0.0.0.0
clientConnection:
  acceptContentTypes: ""
  burst: 10
  contentType: application/vnd.kubernetes.protobuf
  kubeconfig: /etc/kubernetes/kube-proxy.kubeconfig
  qps: 5
clusterCIDR: 172.16.0.0/12,fc00:2222::/112
configSyncPeriod: 15m0s
conntrack:
  max: null
  maxPerCore: 32768
  min: 131072
  tcpCloseWaitTimeout: 1h0m0s
  tcpEstablishedTimeout: 24h0m0s
enableProfiling: false
healthzBindAddress: 0.0.0.0:10256
hostnameOverride: ""
iptables:
  masqueradeAll: false
  masqueradeBit: 14
  minSyncPeriod: 0s
  syncPeriod: 30s
ipvs:
  masqueradeAll: true
  minSyncPeriod: 5s
  scheduler: "rr"
  syncPeriod: 30s
kind: KubeProxyConfiguration
metricsBindAddress: 127.0.0.1:10249
mode: "ipvs"
nodePortAddresses: null
oomScoreAdj: -999
portRange: ""
udpIdleTimeout: 250ms

EOF

# 启动 kube-proxy

systemctl daemon-reload
systemctl restart kube-proxy
systemctl enable --now kube-proxy

七、安装网络插件

wget https://mirrors.chenby.cn/https://github.com/projectcalico/calico/blob/master/manifests/calico-typha.yaml

cp calico-typha.yaml calico.yaml
cp calico-typha.yaml calico-ipv6.yaml

vim calico.yaml
# calico-config ConfigMap处
    "ipam": {
        "type": "calico-ipam",
    },
    - name: IP
      value: "autodetect"

    - name: CALICO_IPV4POOL_CIDR
      value: "172.16.0.0/12"

# vim calico-ipv6.yaml
# calico-config ConfigMap处
    "ipam": {
        "type": "calico-ipam",
        "assign_ipv4": "true",
        "assign_ipv6": "true"
    },
    - name: IP
      value: "autodetect"

    - name: IP6
      value: "autodetect"

    - name: CALICO_IPV4POOL_CIDR
      value: "172.16.0.0/12"

    - name: CALICO_IPV6POOL_CIDR
      value: "fc00::/48"

    - name: FELIX_IPV6SUPPORT
      value: "true"


# 若docker镜像拉不下来，可以使用我的仓库
# sed -i "s#docker.io/calico/#registry.cn-hangzhou.aliyuncs.com/chenby/#g" calico.yaml 
# sed -i "s#docker.io/calico/#registry.cn-hangzhou.aliyuncs.com/chenby/#g" calico-ipv6.yaml


# 本地没有公网 IPv6 使用 calico.yaml
kubectl apply -f calico.yaml

# 本地有公网 IPv6 使用 calico-ipv6.yaml 
# kubectl apply -f calico-ipv6.yaml

八、Helm 安装

wget https://get.helm.sh/helm-canary-linux-amd64.tar.gz
tar xvf helm-canary-linux-amd64.tar.gz
cp linux-amd64/helm /usr/local/bin/

Core DNS 安装

# 下载tgz包
helm repo add coredns https://coredns.github.io/helm
helm pull coredns/coredns
tar xvf coredns-*.tgz
cd coredns/

# 修改IP地址
vim values.yaml
cat values.yaml | grep clusterIP:
clusterIP: "10.96.0.10"

# 示例
---
service:
# clusterIP: ""
# clusterIPs: []
# loadBalancerIP: ""
# externalIPs: []
# externalTrafficPolicy: ""
# ipFamilyPolicy: ""
  # The name of the Service
  # If not set, a name is generated using the fullname template
  clusterIP: "10.96.0.10"
  name: ""
  annotations: {}
---

# 修改为国内源 docker源可选
sed -i "s#coredns/#registry.cn-hangzhou.aliyuncs.com/chenby/#g" values.yaml
sed -i "s#registry.k8s.io/cpa/#registry.cn-hangzhou.aliyuncs.com/chenby/#g" values.yaml

# 默认参数安装
helm install  coredns ./coredns/ -n kube-system

Kubernetes 二进制版本安装 - 1.27.1 docker+docker-cri+calico

一、环境地址

二、集群网络信息规划

三、基础环境配置

四、Kubernetes 组件安装

4.1 安装 Containerd 作为 Runtime (worker 节点安装即可) (4.1-4.2 二选一)

4.2 安装 docker 作为 Runtime (worker 节点安装即可) (4.1-4.2 二选一)

4.3 k8s 与 etcd 下载及安装（ 仅在 master01 操作 ）

4.4 相关证书生成

4.5 k8s 系统组件配置

etcd 配置

4.6 高可用配置

Nginx 高可用方案（与 haproxy 方案二选一）（ 在所有节点执行 ）

4.7 k8s 组件配置

创建 apiserver（所有master节点）

配置 kube-controller-manager service

配置 kube-scheduler service

五、TLS Bootstrapping 配置

六、node 节点配置

七、安装网络插件

八、Helm 安装

Core DNS 安装

评论区

4.3 k8s 与 etcd 下载及安装（仅在 master01 操作）

Nginx 高可用方案（与 haproxy 方案二选一）（在所有节点执行）