kubeadm部署k8s1.27.2版本高可用集群(外部etcd集群带TLS认证）

文章目录

环境
软件版本
服务器系统初始化
etcd 证书生成
etcd集群部署
负载均衡器部署
部署k8s集群
部署网络组件
FAQ

环境

控制平面节点主机的配置最少是2C2G,否则kubeadm init的时候会报错

主机名	IP	组件	系统
os128	192.168.177.128	etcd、kube-apiserver、kube-controller-manager、kube-scheduler、kubelet、kube-proxy、docker、cri-dockerd
os129	192.168.177.129	etcd、kube-apiserver、kube-controller-manager、kube-scheduler、kubelet、kube-proxy、docker、cri-dockerd	CentOS7.9
os130	192.168.177.130	etcd、kube-apiserver、kube-controller-manager、kube-scheduler、kubelet、kube-proxy、docker、cri-dockerd
worker131	192.168.177.131	haproxy、keepalived、kubelet、kube-proxy、docker、cri-dockerd	CentOS7.9
worker132	192.168.177.132	haproxy、keepalived、kubelet、kube-proxy、docker、cri-dockerd	CentOS7.9
VIP	192.168.177.127

软件版本

软件版本明细

软件	版本	备注
CentOS	7.9.2009
kernel	6.7.1-1.el7.elrepo.x86_64
kube-apiserver,kube-controller-manager,kube-schedule,kubelet,kube-proxy	v1.27.2
etcd	v3.5.5
docker	25.0.0
cri-dokcer	0.3.6
haproxy	1.5	系统默认yum源安装
keepalived	1.3.5	系统默认yum源安装
calico	v3.25.0

服务器系统初始化

所有主机都需要

echo "step1 关闭防火墙"
systemctl disable firewalld
systemctl stop firewalld
echo "success 关闭防火墙"

echo "step2 安装iptables"
yum -y install iptables-services
systemctl start iptables
systemctl enable iptables
iptables -F
service iptables save
iptables -L
echo "success 安装iptables"
echo "step3 关闭selinux"
# 临时禁用selinux
setenforce 0
# 永久关闭 修改/etc/sysconfig/selinux文件设置
sed -i 's/SELINUX=enforcing/SELINUX=disabled/g' /etc/sysconfig/selinux
sed -i "s/SELINUX=enforcing/SELINUX=disabled/g" /etc/selinux/config
echo "success 关闭selinux"

echo "step4 禁用交换分区"
swapoff -a
# 永久禁用，打开/etc/fstab注释掉swap那一行。
sed -i 's/.*swap.*/#&/g' /etc/fstab
echo "success 禁用交换分区"

echo "step5 执行配置CentOS阿里云源"
rm -rfv /etc/yum.repos.d/*
curl -o /etc/yum.repos.d/CentOS-Base.repo http://mirrors.aliyun.com/repo/Centos-7.repo
echo "success 执行配置CentOS阿里云源"

echo "step6 时间同步"
yum install -y chrony
systemctl enable chronyd.service
systemctl restart chronyd.service
systemctl status chronyd.service

echo "step7 更新内核"
curl -o /etc/yum.repos.d/epel.repo http://mirrors.aliyun.com/repo/epel-7.repo
rpm --import https://www.elrepo.org/RPM-GPG-KEY-elrepo.org
yum install -y https://www.elrepo.org/elrepo-release-7.0-4.el7.elrepo.noarch.rpm
# 设置内核
#更新yum源仓库
yum -y update
#查看可用的系统内核包
yum --disablerepo="*" --enablerepo=elrepo-kernel list available
#安装内核，注意先要查看可用内核，我安装的是5.19版本的内核
#安装kernel-lt版本，ml为最新稳定版本，lt为长期维护版本
yum --enablerepo=elrepo-kernel install  kernel-ml -y
# yum --enablerepo=elrepo-kernel install kernel-ml -y 
#查看目前可用内核
awk -F\' '$1=="menuentry " {print i++ " : " $2}' /etc/grub2.cfg
echo "使用序号为0的内核，序号0是前面查出来的可用内核编号"
grub2-set-default 0
grub2-mkconfig -o /boot/grub2/grub.cfg
echo "success 更新内核"

echo "step8 配置服务器支持开启ipvs"
cat > /etc/sysconfig/modules/ipvs.modules <<EOF
#!/bin/bash
modprobe -- ip_vs
modprobe -- ip_vs_rr
modprobe -- ip_vs_wrr
modprobe -- ip_vs_sh
modprobe -- nf_conntrack_ipv4
EOF
chmod 755 /etc/sysconfig/modules/ipvs.modules && bash /etc/sysconfig/modules/ipvs.modules && lsmod | grep -e ip_vs -e nf_conntrack_ipv4

yum install -y ipset ipvsadm
echo "success 配置服务器支持开启ipvs"

cat <<EOF | sudo tee /etc/modules-load.d/k8s.conf
overlay
br_netfilter
EOF

sudo modprobe overlay
sudo modprobe br_netfilter

# sysctl params required by setup, params persist across reboots
cat <<EOF | sudo tee /etc/sysctl.d/k8s.conf
net.bridge.bridge-nf-call-iptables  = 1
net.bridge.bridge-nf-call-ip6tables = 1
net.ipv4.ip_forward                 = 1
EOF

# Apply sysctl params without reboot
sudo sysctl --system

echo "step9 重启主机, 使用新升级的内核"
reboot

etcd 证书生成

准备签名证书需要的工具 cfssl、cfssljson、cfssl-certinfo

    wget https://github.com/cloudflare/cfssl/releases/download/v1.6.1/cfssl_1.6.1_linux_amd64
	wget https://github.com/cloudflare/cfssl/releases/download/v1.6.1/cfssljson_1.6.1_linux_amd64
	wget https://github.com/cloudflare/cfssl/releases/download/v1.6.1/cfssl-certinfo_1.6.1_linux_amd64
	
	mv cfssl_1.6.1_linux_amd64  /usr/bin/cfssl
	mv cfssljson_1.6.1_linux_amd64 /usr/bin/cfssljson
	mv cfssl-certinfo_1.6.1_linux_amd64 /usr/bin/cfssl-certinfo
	chmod +x /usr/bin/cfssl*

自签etcd 的CA

mkdir -p ~/TLS/etcd

cd ~/TLS/etcd
#自签CA：
cat > ca-config.json << EOF
{
  "signing": {
    "default": {
      "expiry": "87600h"
    },
    "profiles": {
      "www": {
         "expiry": "87600h",
         "usages": [
            "signing",
            "key encipherment",
            "server auth",
            "client auth"
        ]
      }
    }
  }
}
EOF

cat > ca-csr.json << EOF
{
    "CA": {"expiry": "87600h"},
    "CN": "etcd CA",
    "key": {
        "algo": "rsa",
        "size": 2048
    },
    "names": [
        {
            "C": "CN",
            "L": "Beijing",
            "ST": "Beijing"
        }
    ]
}
EOF

#生成证书：
cfssl gencert -initca ca-csr.json | cfssljson -bare ca -

会生成ca.pem和ca-key.pem文件

使用自签CA签发Etcd HTTPS证书


#创建证书申请文件：
cd ~/TLS/etcd
cat > server-csr.json << EOF
{
    "CN": "etcd",
    "hosts": [
    "192.168.177.128",
    "192.168.177.129",
    "192.168.177.130"
    ],
    "key": {
        "algo": "rsa",
        "size": 2048
    },
    "names": [
        {
            "C": "CN",
            "L": "BeiJing",
            "ST": "BeiJing"
        }
    ]
}
EOF

#注：上述文件hosts字段中IP为所有etcd节点的集群内部通信IP，一个都不能少！为了方便后期扩容可以多写几个预留的IP。
#生成证书：
cfssl gencert -ca=ca.pem -ca-key=ca-key.pem -config=ca-config.json -profile=www server-csr.json | cfssljson -bare server

#会生成server.pem和server-key.pem文件。

etcd集群部署

Etcd 的概念：
Etcd 是一个分布式键值存储系统，Kubernetes使用Etcd进行数据存储，所以先准备一个Etcd数据库，为解决Etcd单点故障，应采用集群方式部署，这里使用3台组建集群，可容忍1台机器故障，当然，你也可以使用5台组建集群，可容忍2台机器故障。
以下在节点os128上操作，为简化操作，待会将节点os128生成的所有文件拷贝到节点os129和节点os130

# 准备etcd的安装包
wget  https://github.com/etcd-io/etcd/releases/download/v3.5.5/etcd-v3.5.5-linux-amd64.tar.gz 

mkdir -pv /opt/etcd/{bin,cfg,ssl}
tar zxvf etcd-v3.5.5-linux-amd64.tar.gz
mv etcd-v3.5.5-linux-amd64/{etcd,etcdctl} /opt/etcd/bin/

准备etcd的配置文件

#os128主机 etcd 配置文件
cat > /opt/etcd/cfg/etcd.conf << EOF
#[Member]
ETCD_NAME="etcd-1"
ETCD_DATA_DIR="/var/lib/etcd/default.etcd"
ETCD_LISTEN_PEER_URLS="https://192.168.177.128:2380"
ETCD_LISTEN_CLIENT_URLS="https://192.168.177.128:2379"
#[Clustering]
ETCD_INITIAL_ADVERTISE_PEER_URLS="https://192.168.177.128:2380"
ETCD_ADVERTISE_CLIENT_URLS="https://192.168.177.128:2379"
ETCD_INITIAL_CLUSTER="etcd-1=https://192.168.177.128:2380,etcd-2=https://192.168.177.129:2380,etcd-3=https://192.168.177.130:2380"
ETCD_INITIAL_CLUSTER_TOKEN="etcd-cluster"
ETCD_INITIAL_CLUSTER_STATE="new"
EOF

# systemd管理etcd
cat > /usr/lib/systemd/system/etcd.service << EOF
[Unit]
Description=Etcd Server
After=network.target
After=network-online.target
Wants=network-online.target

[Service]
Type=notify
EnvironmentFile=/opt/etcd/cfg/etcd.conf
ExecStart=/opt/etcd/bin/etcd \
--cert-file=/opt/etcd/ssl/server.pem \
--key-file=/opt/etcd/ssl/server-key.pem \
--peer-cert-file=/opt/etcd/ssl/server.pem \
--peer-key-file=/opt/etcd/ssl/server-key.pem \
--trusted-ca-file=/opt/etcd/ssl/ca.pem \
--peer-trusted-ca-file=/opt/etcd/ssl/ca.pem \
--logger=zap
Restart=on-failure
LimitNOFILE=65536

[Install]
WantedBy=multi-user.target
EOF

安装etcd集群

#拷贝刚才生成的证书
#把刚才生成的证书拷贝到配置文件中的路径：
cp ~/TLS/etcd/ca*pem ~/TLS/etcd/server*pem /opt/etcd/ssl/

# 同步所有主机
scp -r /opt/etcd/ root@192.168.177.129:/opt/
scp -r /opt/etcd/ root@192.168.177.130:/opt/
scp /usr/lib/systemd/system/etcd.service root@192.168.177.129:/usr/lib/systemd/system/
scp /usr/lib/systemd/system/etcd.service root@192.168.177.130:/usr/lib/systemd/system/

# os129 主机etcd的配置文件
cat > /opt/etcd/cfg/etcd.conf << EOF
#[Member]
ETCD_NAME="etcd-2"
ETCD_DATA_DIR="/var/lib/etcd/default.etcd"
ETCD_LISTEN_PEER_URLS="https://192.168.177.129:2380"
ETCD_LISTEN_CLIENT_URLS="https://192.168.177.129:2379"
#[Clustering]
ETCD_INITIAL_ADVERTISE_PEER_URLS="https://192.168.177.129:2380"
ETCD_ADVERTISE_CLIENT_URLS="https://192.168.177.129:2379"
ETCD_INITIAL_CLUSTER="etcd-1=https://192.168.177.128:2380,etcd-2=https://192.168.177.129:2380,etcd-3=https://192.168.177.130:2380"
ETCD_INITIAL_CLUSTER_TOKEN="etcd-cluster"
ETCD_INITIAL_CLUSTER_STATE="new"
EOF

# os130主机etcd配置文件
cat > /opt/etcd/cfg/etcd.conf << EOF
#[Member]
ETCD_NAME="etcd-3"
ETCD_DATA_DIR="/var/lib/etcd/default.etcd"
ETCD_LISTEN_PEER_URLS="https://192.168.177.130:2380"
ETCD_LISTEN_CLIENT_URLS="https://192.168.177.130:2379"
#[Clustering]
ETCD_INITIAL_ADVERTISE_PEER_URLS="https://192.168.177.130:2380"
ETCD_ADVERTISE_CLIENT_URLS="https://192.168.177.130:2379"
ETCD_INITIAL_CLUSTER="etcd-1=https://192.168.177.128:2380,etcd-2=https://192.168.177.129:2380,etcd-3=https://192.168.177.130:2380"
ETCD_INITIAL_CLUSTER_TOKEN="etcd-cluster"
ETCD_INITIAL_CLUSTER_STATE="new"
EOF

启动etcd并设置开启自启

启动etcd:
systemctl daemon-reload
systemctl start etcd
systemctl enable etcd

使用etcdctl验证etcd集群

 ETCDCTL_API=3 /opt/etcd/bin/etcdctl --cacert=/opt/etcd/ssl/ca.pem --cert=/opt/etcd/ssl/server.pem --key=/opt/etcd/ssl/server-key.pem --endpoints="https://192.168.177.128:2379,https://192.168.177.129:2379,https://192.168.177.130:2379" endpoint health --write-out=table

负载均衡器部署

worker131、worker132主机上执行

安装haproxy、keepalived

 yum install haproxy keepalived -y

haproxy 配置

cat > /etc/haproxy/haproxy.cfg <<EOF
global
    log         127.0.0.1 local2
    chroot      /var/lib/haproxy
    pidfile     /var/run/haproxy.pid
    maxconn     6000
    user        haproxy
    group       haproxy
    daemon
    stats socket /var/lib/haproxy/stats
#---------------------------------------------------------------------
defaults
    mode                    tcp
    log                     global
    option                  tcplog
    option                  dontlognull
    option                  redispatch
    retries                 3
    timeout http-request    10s
    timeout queue           1m
    timeout connect         10s
    timeout client          1m
    timeout server          1m
    timeout http-keep-alive 10s
    timeout check           10s
    maxconn                 3000
#---------------------------------------------------------------------
listen stats
    bind 0.0.0.0:9100
    mode  http
    option httplog
    stats uri /status
    stats refresh 30s
    stats realm "Haproxy Manager"
    stats auth admin:password
    stats hide-version
    stats admin if TRUE
#---------------------------------------------------------------------
frontend  k8s-master-default-nodepool-apiserver
    bind *:6443
    mode tcp
    default_backend             k8s-master-default-nodepool
#---------------------------------------------------------------------
backend k8s-master-default-nodepool
    balance     roundrobin
    mode tcp
    server  k8s-apiserver-1 192.168.177.128:6443 check weight 1 maxconn 2000 check inter 2000 rise 2 fall 3
    server  k8s-apiserver-2 192.168.177.129:6443 check weight 1 maxconn 2000 check inter 2000 rise 2 fall 3
    server  k8s-apiserver-3 192.168.177.130:6443 check weight 1 maxconn 2000 check inter 2000 rise 2 fall 3
EOF

keepalived配置

worker131 主机配置

cat > /etc/keepalived/keepalived.conf  << EOF
! Configuration File for keepalived
global_defs {
   router_id LVS_DEVEL
   script_user root
   enable_script_security
}
vrrp_script check_haproxy {
   script "/etc/keepalived/check_haproxy.sh"
   interval 5
   weight -5
   fall 2 
rise 1
}
vrrp_instance VI_1 {
   state BACKUP
   interface ens33
   # 非抢占vip模式
   nopreempt
   # 单播
   unicast_src_ip 192.168.177.131
   unicast_peer {
    192.168.177.132
    }
   virtual_router_id 51
   #优先级100大于从服务的99
   priority 100
   advert_int 2
   authentication {
       auth_type PASS
       auth_pass K8SHA_KA_AUTH
   }
   virtual_ipaddress {
       #配置规划的虚拟ip
       192.168.177.127
   }
   #配置对worker131主机haproxy进行监控的脚本
   track_script {
      #指定执行脚本的名称(vrrp_script check_haproxy此处做了配置)
      check_haproxy
   }
}
EOF

worker132 主机配置

cat  > /etc/keepalived/keepalived.conf << EOF
! Configuration File for keepalived
global_defs {
   router_id LVS_DEVEL
script_user root
   enable_script_security
}
vrrp_script check_haproxy {
   script "/etc/keepalived/check_haproxy.sh"
  interval 5
   weight -5
   fall 2 
rise 1
}
vrrp_instance VI_1 {
   state BACKUP
   interface ens33
   nopreempt
   unicast_src_ip 192.168.177.132
   unicast_peer {
    192.168.177.131
    }
   virtual_router_id 51
   priority 99
   advert_int 2
   authentication {
       auth_type PASS
       auth_pass K8SHA_KA_AUTH
   }
   virtual_ipaddress {
       192.168.177.127
   }
   #配置对worker132主机haproxy进行监控的脚本
   track_script {
      #指定执行脚本的名称(vrrp_script check_haproxy此处做了配置)
      check_haproxy
   }
}
EOF

健康检查脚本

cat > /etc/keepalived/check_haproxy.sh <<EOF 
#!/bin/bash
err=0
for k in $(seq 1 3)
do
   check_code=$(pgrep haproxy)
   if [[ $check_code == "" ]]; then
       err=$(expr $err + 1)
       sleep 1
       continue
   else
       err=0
       break
   fi
done

if [[ $err != "0" ]]; then
   echo "systemctl stop keepalived"
   /usr/bin/systemctl stop keepalived
   exit 1
else
   exit 0
fi
EOF
chmod +x /etc/keepalived/check_haproxy.sh

设置开启自启并验证高可用VIP

systemctl daemon-reload
systemctl enable --now haproxy
systemctl enable --now keepalived
#查看启动状态
systemctl status keepalived haproxy
#查看虚拟ip是否配置成功了
ip address show

部署k8s集群

安装kubernets相关软件

cat <<EOF > /etc/yum.repos.d/kubernetes.repo
[kubernetes]
name=Kubernetes
baseurl=https://mirrors.aliyun.com/kubernetes/yum/repos/kubernetes-el7-x86_64/
enabled=1
gpgcheck=0
repo_gpgcheck=0
gpgkey=https://mirrors.aliyun.com/kubernetes/yum/doc/yum-key.gpg https://mirrors.aliyun.com/kubernetes/yum/doc/rpm-package-key.gpg
EOF
# 安装kubeadm、kubectl、kubelet
version=1.27.2-0
yum install -y kubectl-$version kubeadm-$version kubelet-$version --disableexcludes=kubernetes
# kubelet服务
systemctl enable kubelet

安装docker

# 使用docker engine作为CRI, 使用docker进行容器管理
# 安装docker所需的工具
yum install -y yum-utils device-mapper-persistent-data lvm2 bash-completion net-tools gcc
# 配置阿里云的docker源
yum-config-manager --add-repo http://mirrors.aliyun.com/docker-ce/linux/centos/docker-ce.repo
yum install -y docker-ce
mkdir  -p /etc/docker
cat > /etc/docker/daemon.json <<EOF
{
    "exec-opts": ["native.cgroupdriver=systemd"],
    "log-driver": "json-file",
    "log-opts": {
    "max-size": "100m"
    },
    "storage-driver": "overlay2",  
    "data-root": "/var/lib/docker"
}
EOF
echo "启动docker"
systemctl daemon-reload
systemctl enable docker && systemctl start docker && systemctl status docker

安装cri-docker

# yum 从远程地址安装
yum install -y https://github.com/Mirantis/cri-dockerd/releases/download/v0.3.6/cri-dockerd-0.3.6.20231018204925.877dc6a4-0.el7.x86_64.rpm
# 更换container-image的镜像地址
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 --container-runtime-endpoint fd://
ExecStart=/usr/bin/cri-dockerd --network-plugin=cni --pod-infra-container-image=registry.aliyuncs.com/google_containers/pause:3.9
ExecReload=/bin/kill -s HUP $MAINPID
TimeoutSec=0
RestartSec=2
Restart=always

# Note that StartLimit* options were moved from "Service" to "Unit" in systemd 229.
# Both the old, and new location are accepted by systemd 229 and up, so using the old location
# to make them work for either version of systemd.
StartLimitBurst=3

# Note that StartLimitInterval was renamed to StartLimitIntervalSec in systemd 230.
# Both the old, and new name are accepted by systemd 230 and up, so using the old name to make
# this option work for either version of systemd.
StartLimitInterval=60s

# Having non-zero Limit*s causes performance problems due to accounting overhead
# in the kernel. We recommend using cgroups to do container-local accounting.
LimitNOFILE=infinity
LimitNPROC=infinity
LimitCORE=infinity

# Comment TasksMax if your systemd version does not support it.
# Only systemd 226 and above support this option.
TasksMax=infinity
Delegate=yes
KillMode=process

[Install]
WantedBy=multi-user.target
EOF

systemctl daemon-reload
systemctl enable   --now  cri-docker
# 验证cri运行时使用有木有问题
crictl config runtime-endpoint unix:///var/run/cri-dockerd.sock
crictl ps

生成集群init配置文件

#查看默认的KubeletConfiguration配置
kubeadm config print init-defaults --component-configs KubeletConfiguration
# 查看默认的KubeProxyConfiguration的配置
kubeadm config print init-defaults --component-configs KubeProxyConfiguration
# 查看默认配置
kubeadm config print init-defaults

cat >config.yml <<EOF
apiVersion: kubeadm.k8s.io/v1beta3
bootstrapTokens:
- groups:
  - system:bootstrappers:kubeadm:default-node-token
  token: abcdef.0123456789abcdef
  ttl: 24h0m0s
  usages:
  - signing
  - authentication
kind: InitConfiguration
localAPIEndpoint:
  advertiseAddress: 192.168.177.128
  bindPort: 6443
nodeRegistration:
  criSocket:  unix:///var/run/cri-dockerd.sock  #由于是用的docker这里必须修改，否则初始化会报错
  imagePullPolicy: IfNotPresent
  name: os128    #节点名字 一般和主机名对应
  taints: null
---
apiServer:
  timeoutForControlPlane: 4m0s
apiVersion: kubeadm.k8s.io/v1beta3
certificatesDir: /etc/kubernetes/pki
clusterName: kubernetes
controllerManager: {}
dns: {}
controlPlaneEndpoint: "192.168.177.127:6443"
etcd:
  external:                                                     #这里默认是local，由于我们用的外部etcd，所以需要修改
    endpoints:
      - https://192.168.177.128:2379
      - https://192.168.177.129:2379
      - https://192.168.177.130:2379
    #搭建etcd集群时生成的ca证书
    caFile: /opt/etcd/ssl/ca.pem
    #搭建etcd集群时生成的客户端证书
    certFile: /opt/etcd/ssl/server.pem
    #搭建etcd集群时生成的客户端密钥
    keyFile: /opt/etcd/ssl/server-key.pem
imageRepository: registry.aliyuncs.com/google_containers
kind: ClusterConfiguration
kubernetesVersion: 1.27.2               #和版本需要一一对应
networking:
  dnsDomain: cluster.local
  podSubnet: 10.244.0.0/16      #pod的CIDR地址，不要和别的有交叉
  serviceSubnet: 10.96.0.0/12    #service的CIDR地址，不要和别的有交叉
scheduler: {}
EOF

初始化第一个控制平面节点
kubeadm init --config config.yml --upload-certs --v=9
初始化成功截图：

若是启动失败则执行： kubeadm reset --cri-socket unix:///var/run/cri-dockerd.sock 可以调整相应的配置再次执行init 操作。
其他的控制节点加入

kubeadm join 192.168.177.127:6443 --token abcdef.0123456789abcdef --discovery-token-ca-cert-hash sha256:64d45ed9871fef66926dfcfb864c9b3acf9e74598a9e9a737a34699618229f91 --control-plane --certificate-key 6bda0e68648b0c60222bee6faf3cfeefc4bee2d007a265f3267a30d9ef055fff   --cri-socket  unix:///var/run/cri-dockerd.sock

其他数据平面节点加入

kubeadm join 192.168.177.127:6443 --token abcdef.0123456789abcdef --discovery-token-ca-cert-hash sha256:64d45ed9871fef66926dfcfb864c9b3acf9e74598a9e9a737a34699618229f91  --cri-socket  unix:///var/run/cri-dockerd.sock

节点加入集群后，默认都是NotReady状态，需要安装网络插件后才会Ready
在这里插入图片描述

部署网络组件

下载calico

wget https://docs.tigera.io/archive/v3.25/manifests/calico.yaml

修改默认网段

# 把calico.yaml里pod所在网段改成 --cluster-cidr=10.244.0.0/16 时选项所指定的网段，
#直接用vim编辑打开此文件查找192，按如下标记进行修改：
# no effect. This should fall within `--cluster-cidr`.
# - name: CALICO_IPV4POOL_CIDR
#   value: "192.168.1.0/16"
# Disable file logging so `kubectl logs` works.
- name: CALICO_DISABLE_FILE_LOGGING
  value: "true"
  
把两个#及#后面的空格去掉，并把192.168.1.0/16改成10.244.0.0/16
# no effect. This should fall within `--cluster-cidr`.
- name: CALICO_IPV4POOL_CIDR
  value: "10.244.0.0/16"  #与kubeadm init所用的配置文件定义的 pod网段保持一致。
# Disable file logging so `kubectl logs` works.
- name: CALICO_DISABLE_FILE_LOGGING
  value: "true"

部署calico
kubectl apply -f calico.yaml
验证node节点是否Ready
kubectl get node

FAQ

worker131 一块网卡上有两个IP，kubelet 使用了一个keepalived 的vip,需要修改成131的IP解决方案：在worker131 主机上/var/lib/kubelet/kubeadm-flags.env 中使用-node-ip 指定要使用的IP,然后重启kubelet即可

KUBELET_KUBEADM_ARGS="--node-ip=192.168.177.131 --container-runtime-endpoint=unix:///var/run/cri-dockerd.sock --pod-infra-container-image=registry.aliyuncs.com/google_containers/pause:3.9"