基于centos7.9二进制部署kubernetes1.25.4（中）

4、配置etcd

4-1、配置etcd

说明：etcd配置大致相同，注意修改每个Master节点的etcd配置的主机名和IP地址

# master01:
[root@k8s-master01 ~]# vim /etc/etcd/etcd.config.yml
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://192.168.100.153:2380'
listen-client-urls: 'https://192.168.100.153:2379,http://127.0.0.1:2379'
max-snapshots: 3
max-wals: 5
cors:
initial-advertise-peer-urls: 'https://192.168.100.153:2380'
advertise-client-urls: 'https://192.168.100.153:2379'
discovery:
discovery-fallback: 'proxy'
discovery-proxy:
discovery-srv:
initial-cluster: 'k8s-master01=https://192.168.100.153:2380,k8s-master02=https://192.168.100.154:2380,k8s-master03=https://192.168.100.155:2380'
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

# master02：
[root@k8s-master02 ~]# vim /etc/etcd/etcd.config.yml
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://192.168.100.154:2380'
listen-client-urls: 'https://192.168.100.154:2379,http://127.0.0.1:2379'
max-snapshots: 3
max-wals: 5
cors:
initial-advertise-peer-urls: 'https://192.168.100.154:2380'
advertise-client-urls: 'https://192.168.100.154:2379'
discovery:
discovery-fallback: 'proxy'
discovery-proxy:
discovery-srv:
initial-cluster: 'k8s-master01=https://192.168.100.153:2380,k8s-master02=https://192.168.100.154:2380,k8s-master03=https://192.168.100.155:2380'
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

# master03：
[root@k8s-master03 ~]# vim /etc/etcd/etcd.config.yml
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://192.168.100.155:2380'
listen-client-urls: 'https://192.168.100.155:2379,http://127.0.0.1:2379'
max-snapshots: 3
max-wals: 5
cors:
initial-advertise-peer-urls: 'https://192.168.100.155:2380'
advertise-client-urls: 'https://192.168.100.155:2379'
discovery:
discovery-fallback: 'proxy'
discovery-proxy:
discovery-srv:
initial-cluster: 'k8s-master01=https://192.168.100.153:2380,k8s-master02=https://192.168.100.154:2380,k8s-master03=https://192.168.100.155:2380'
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

4-2、创建用于etcd的service

# 所有Master节点创建etcd service并启动
[root@k8s-master01 ~]# vim /usr/lib/systemd/system/etcd.service
[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

# 所有Master节点创建etcd的证书目录
[root@k8s-master01 ~]# mkdir /etc/kubernetes/pki/etcd
[root@k8s-master01 ~]# ln -s /etc/etcd/ssl/* /etc/kubernetes/pki/etcd/
[root@k8s-master01 ~]# systemctl daemon-reload
[root@k8s-master01 ~]# systemctl enable --now etcd


# 查看etcd状态
[root@k8s-master01 ~]# export ETCDCTL_API=3
[root@k8s-master01 ~]#  etcdctl --endpoints="192.168.100.153:2379,192.168.100.154:2379,192.168.100.155:2379" --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 |
+----------------------+------------------+---------+---------+-----------+------------+-----------+------------+--------------------+--------+
| 192.168.100.153:2379 | e9f58d0912257160 |   3.5.4 |   20 kB |      true |      false |         2 |          9 |                  9 |        |
| 192.168.100.154:2379 | 7b304cf1777afde5 |   3.5.4 |   25 kB |     false |      false |         2 |          9 |                  9 |        |
| 192.168.100.155:2379 | a3e2564921c8f7ea |   3.5.4 |   25 kB |     false |      false |         2 |          9 |                  9 |        |
+----------------------+------------------+---------+---------+-----------+------------+-----------+------------+--------------------+--------+

5、配置高可用

说明：如果不是高可用集群，haproxy和keepalived无需安装

5-1、配置haproxy

# 所有Master节点安装keepalived和haproxy
[root@k8s-master01 ~]# yum install keepalived haproxy -y

# 所有Master配置HAProxy，配置一样,删掉默认所有内容后复制下列内容
[root@k8s-master01 ~]# vim /etc/haproxy/haproxy.cfg
global
  maxconn  2000
  ulimit-n  16384
  log  127.0.0.1 local0 err
  stats timeout 30s

defaults
  log global
  mode  http
  option  httplog
  timeout connect 5000
  timeout client  50000
  timeout server  50000
  timeout http-request 15s
  timeout http-keep-alive 15s

frontend k8s-master
  bind 0.0.0.0:8443
  bind 127.0.0.1:8443
  mode tcp
  option tcplog
  tcp-request inspect-delay 5s
  default_backend k8s-master

backend k8s-master
  mode tcp
  option tcplog
  option tcp-check
  balance roundrobin
  default-server inter 10s downinter 5s rise 2 fall 2 slowstart 60s maxconn 250 maxqueue 256 weight 100
  server k8s-master01    192.168.100.153:6443  check
  server k8s-master02    192.168.100.154:6443  check
  server k8s-master03    192.168.100.155:6443  check


[root@k8s-master01 ~]# scp /etc/haproxy/haproxy.cfg 192.168.100.154:/etc/haproxy/haproxy.cfg

[root@k8s-master01 ~]# scp /etc/haproxy/haproxy.cfg 192.168.100.155:/etc/haproxy/haproxy.cfg

5-2、配置keepalived

# 所有Master节点配置KeepAlived，配置不一样，注意区分，默认内容删除后复制下列内容
# 下列内容interface eth0网卡名修改成自己Master机器的网卡名
# 注意每个节点的IP和网卡（interface后的网卡名参数）

# master01
[root@k8s-master01 ~]# vim /etc/keepalived/keepalived.conf
global_defs {
    router_id LVS_DEVEL
}
vrrp_script chk_apiserver {
    script "/etc/keepalived/check_apiserver.sh"
    interval 5 
    weight -5
    fall 2
    rise 1
}
vrrp_instance VI_1 {
    state MASTER
    interface eth0
#   mcast_src_ip 224.8.8.8
    virtual_router_id 51
    priority 101
    nopreempt
    advert_int 2
    authentication {
        auth_type PASS
        auth_pass 1111
    }
    virtual_ipaddress {
        192.168.100.99
    }
    unicast_src_ip 192.168.100.153
    unicast_peer {
        192.168.100.154
        192.168.100.155
    }
    track_script {
      chk_apiserver 
    } 
}


[root@k8s-master01 ~]# vim /etc/keepalived/check_apiserver.sh 
[root@k8s-master01 ~]# chmod +x /etc/keepalived/check_apiserver.sh
[root@k8s-master01 ~]# scp /etc/keepalived/check_apiserver.sh 192.168.100.154:/etc/keepalived/check_apiserver.sh
[root@k8s-master01 ~]# scp /etc/keepalived/check_apiserver.sh 192.168.100.155:/etc/keepalived/check_apiserver.sh

# master02
[root@k8s-master02 ~]# vim /etc/keepalived/keepalived.conf
global_defs {
    router_id LVS_DEVEL
}
vrrp_script chk_apiserver {
    script "/etc/keepalived/check_apiserver.sh"
    interval 5 
    weight -5
    fall 2
    rise 1

}
vrrp_instance VI_1 {
    state BACKUP
    interface eth0
#    mcast_src_ip 224.8.8.8
    virtual_router_id 51
    priority 100
    nopreempt
    advert_int 2
    authentication {
        auth_type PASS
        auth_pass 1111
    }
    virtual_ipaddress {
        192.168.100.99
    }
    unicast_src_ip 192.168.100.154
    unicast_peer {
        192.168.100.153
        192.168.100.155
    }

    track_script {
      chk_apiserver 
    } 
}

# master03
[root@k8s-master03 ~]# vim /etc/keepalived/keepalived.conf
global_defs {
    router_id LVS_DEVEL
}
vrrp_script chk_apiserver {
    script "/etc/keepalived/check_apiserver.sh"
    interval 5
    weight -5
    fall 2  
    rise 1
}
vrrp_instance VI_1 {
    state BACKUP
    interface eth0
#    mcast_src_ip 224.8.8.8
    virtual_router_id 51
    priority 100
    nopreempt
    advert_int 2
    authentication {
        auth_type PASS
        auth_pass 1111
    }
    virtual_ipaddress {
        192.168.100.99
    }
    unicast_src_ip 192.168.100.155
    unicast_peer {
        192.168.100.153
        192.168.100.155
    }

    track_script {
      chk_apiserver 
    }
}

# 所有master节点
# 创建健康性检查脚本：
[root@k8s-master01 keepalived]# vim /etc/keepalived/check_apiserver.sh 
#!/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

[root@k8s-master01 ~]# chmod +x /etc/keepalived/check_apiserver.sh

# 所有master节点启动haproxy和keepalived
[root@k8s-master01 ~]# systemctl daemon-reload && systemctl enable --now haproxy && systemctl enable --now keepalived

[root@k8s-master01 ~]# systemctl status haproxy keepalived

[root@k8s-master02 ~]# ping 192.168.100.99
PING 192.168.100.99 (192.168.100.99) 56(84) bytes of data.
64 bytes from 192.168.100.99: icmp_seq=1 ttl=64 time=1.23 ms

[root@k8s-master02 ~]# telnet 192.168.100.99 8443

# 重要：如果安装了keepalived和haproxy，需要测试keepalived是否是正常的
# 如果ping不通且telnet没有出现 ]，则认为VIP不可以，不可在继续往下执行，需要排查keepalived的问题，比如防火墙和selinux，haproxy和keepalived的状态，监听端口等

6、配置k8s组件

# 所有节点
[root@k8s-master01 ~]# mkdir -p /etc/kubernetes/manifests/ /etc/systemd/system/kubelet.service.d /var/lib/kubelet /var/log/kubernetes

注意本文档使用的k8s service网段为192.168.0.0/16，该网段不能和宿主机的网段、Pod网段的重复，请按需修改

# master01:
[root@k8s-master01 ~]# vim /usr/lib/systemd/system/kube-apiserver.service 

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

[Service]
ExecStart=/usr/local/bin/kube-apiserver \
      --v=2  \
      --logtostderr=true  \
      --allow-privileged=true  \
      --bind-address=0.0.0.0  \
      --secure-port=6443  \
      --advertise-address=192.168.100.153 \
      --service-cluster-ip-range=10.96.0.0/16  \
      --service-node-port-range=30000-32767  \
      --etcd-servers=https://192.168.100.153:2379,https://192.168.100.154:2379,https://192.168.100.155:2379 \
      --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  \
    --feature-gates=LegacyServiceAccountTokenNoAutoGeneration=false \
      --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
      # --token-auth-file=/etc/kubernetes/token.csv

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

[Install]
WantedBy=multi-user.target

# master02:
[root@k8s-master02 ~]# vim  /usr/lib/systemd/system/kube-apiserver.service 

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

[Service]
ExecStart=/usr/local/bin/kube-apiserver \
      --v=2  \
      --logtostderr=true  \
      --allow-privileged=true  \
      --bind-address=0.0.0.0  \
      --secure-port=6443  \
      --advertise-address=192.168.100.154 \
      --service-cluster-ip-range=10.96.0.0/16  \
      --service-node-port-range=30000-32767  \
      --etcd-servers=https://192.168.100.153:2379,https://192.168.100.154:2379,https://192.168.100.155:2379 \
      --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  \
    --feature-gates=LegacyServiceAccountTokenNoAutoGeneration=false \
      --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
      # --token-auth-file=/etc/kubernetes/token.csv

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

[Install]
WantedBy=multi-user.target

# master03:
[root@k8s-master03 ~]# vim  /usr/lib/systemd/system/kube-apiserver.service 
[Unit]
Description=Kubernetes API Server
Documentation=https://github.com/kubernetes/kubernetes
After=network.target

[Service]
ExecStart=/usr/local/bin/kube-apiserver \
      --v=2  \
      --logtostderr=true  \
      --allow-privileged=true  \
      --bind-address=0.0.0.0  \
      --secure-port=6443  \
      --advertise-address=192.168.100.155 \
      --service-cluster-ip-range=10.96.0.0/16  \
      --service-node-port-range=30000-32767  \
      --etcd-servers=https://192.168.100.153:2379,https://192.168.100.154:2379,https://192.168.100.155:2379 \
      --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  \
    --feature-gates=LegacyServiceAccountTokenNoAutoGeneration=false \
      --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
      # --token-auth-file=/etc/kubernetes/token.csv

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

[Install]
WantedBy=multi-user.target

6-1、启动kube-apiserver

# 所有Master节点开启kube-apiserver
[root@k8s-master01 ~]# systemctl daemon-reload && systemctl enable --now kube-apiserver

[root@k8s-master01 ~]# systemctl status kube-apiserver

6-2、ControllerManager

说明：所有Master节点配置kube-controller-manager service（所有master节点配置一样）

注意本文档使用的k8s Pod网段为172.16.0.0/12，该网段不能和宿主机的网段、k8s Service网段的重复，请按需修改

# 所有Master节点:
[root@k8s-master01 ~]# vim /usr/lib/systemd/system/kube-controller-manager.service

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

[Service]
ExecStart=/usr/local/bin/kube-controller-manager \
      --v=2 \
      --logtostderr=true \
      --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 \
    --feature-gates=LegacyServiceAccountTokenNoAutoGeneration=false \
      --leader-elect=true \
      --use-service-account-credentials=true \
      --node-monitor-grace-period=40s \
      --node-monitor-period=5s \
      --pod-eviction-timeout=2m0s \
      --controllers=*,bootstrapsigner,tokencleaner \
      --allocate-node-cidrs=true \
      --cluster-cidr=172.16.0.0/12 \
      --requestheader-client-ca-file=/etc/kubernetes/pki/front-proxy-ca.pem \
      --node-cidr-mask-size=24

Restart=always
RestartSec=10s

[Install]
WantedBy=multi-user.target

# 所有Master节点启动kube-controller-manager
[root@k8s-master01 ~]# systemctl daemon-reload && systemctl enable --now kube-controller-manager && systemctl status kube-controller-manager

6-3、Schedule

说明：所有Master节点配置kube-scheduler service（所有master节点配置一样）

#所有master节点：
[root@k8s-master01 ~]# vim /usr/lib/systemd/system/kube-scheduler.service
[Unit]
Description=Kubernetes Scheduler
Documentation=https://github.com/kubernetes/kubernetes
After=network.target

[Service]
ExecStart=/usr/local/bin/kube-scheduler \
      --v=2 \
      --logtostderr=true \
      --leader-elect=true \
      --authentication-kubeconfig=/etc/kubernetes/scheduler.kubeconfig \
      --authorization-kubeconfig=/etc/kubernetes/scheduler.kubeconfig \
      --kubeconfig=/etc/kubernetes/scheduler.kubeconfig

Restart=always
RestartSec=10s

[Install]
WantedBy=multi-user.target

[root@k8s-master01 ~]# systemctl daemon-reload && systemctl enable --now kube-scheduler && systemctl status kube-scheduler

6-4、TLS Bootstrapping配置

说明：只需要在Master01创建bootstrap

注意，如果不是高可用集群，192.168.100.99:8443改为master01的地址，8443改为apiserver的端口，默认是6443

# master01：
[root@k8s-master01 ~]# cd /root/k8s-ha-install/bootstrap

[root@k8s-master01 bootstrap]#  kubectl config set-cluster kubernetes     --certificate-authority=/etc/kubernetes/pki/ca.pem     --embed-certs=true     --server=https://192.168.100.99:8443     --kubeconfig=/etc/kubernetes/bootstrap-kubelet.kubeconfig

[root@k8s-master01 bootstrap]# kubectl config set-credentials tls-bootstrap-token-user     --token=c8ad9c.2e4d610cf3e7426e --kubeconfig=/etc/kubernetes/bootstrap-kubelet.kubeconfig

[root@k8s-master01 bootstrap]# kubectl config set-context tls-bootstrap-token-user@kubernetes     --cluster=kubernetes     --user=tls-bootstrap-token-user     --kubeconfig=/etc/kubernetes/bootstrap-kubelet.kubeconfig

[root@k8s-master01 bootstrap]# kubectl config use-context tls-bootstrap-token-user@kubernetes     --kubeconfig=/etc/kubernetes/bootstrap-kubelet.kubeconfig

注意：如果要修改bootstrap.secret.yaml的token-id和token-secret，需要保证下图红圈内的字符串一致的，并且位数是一样的。还要保证上个命令的黄色字体：c8ad9c.2e4d610cf3e7426e与你修改的字符串要一致

[root@k8s-master01 bootstrap]# mkdir -p /root/.kube ; cp /etc/kubernetes/admin.kubeconfig /root/.kube/config

# 可以正常查询集群状态，才可以继续往下，否则不行，需要排查k8s组件是否有故障
[root@k8s-master01 bootstrap]# kubectl get cs
Warning: v1 ComponentStatus is deprecated in v1.19+
NAME                 STATUS      MESSAGE                                                                                        ERROR
controller-manager   Unhealthy   Get "https://127.0.0.1:10257/healthz": dial tcp 127.0.0.1:10257: connect: connection refused   
scheduler            Unhealthy   Get "https://127.0.0.1:10259/healthz": dial tcp 127.0.0.1:10259: connect: connection refused   
etcd-1               Healthy     {"health":"true","reason":""}                                                                  
etcd-0               Healthy     {"health":"true","reason":""}                                                                  
etcd-2               Healthy     {"health":"true","reason":""}    

[root@k8s-master01 bootstrap]# kubectl create -f bootstrap.secret.yaml 
secret/bootstrap-token-c8ad9c created
clusterrolebinding.rbac.authorization.k8s.io/kubelet-bootstrap created
clusterrolebinding.rbac.authorization.k8s.io/node-autoapprove-bootstrap created
clusterrolebinding.rbac.authorization.k8s.io/node-autoapprove-certificate-rotation created
clusterrole.rbac.authorization.k8s.io/system:kube-apiserver-to-kubelet created
clusterrolebinding.rbac.authorization.k8s.io/system:kube-apiserver created

7、配置node节点

7-1、复制证书

# Master01节点复制证书至Node节点
[root@k8s-master01 bootstrap]# cd /etc/kubernetes/
[root@k8s-master01 kubernetes]#for NODE in k8s-master02 k8s-master03 k8s-node01 k8s-node02; do
     ssh $NODE mkdir -p /etc/kubernetes/pki
     for FILE in pki/ca.pem pki/ca-key.pem pki/front-proxy-ca.pem bootstrap-kubelet.kubeconfig; do
       scp /etc/kubernetes/$FILE $NODE:/etc/kubernetes/${FILE}
 done
 done

7-2、配置Kubelet

# 所有节点创建相关目录
[root@k8s-master01 kubernetes]# mkdir -p /var/lib/kubelet /var/log/kubernetes /etc/systemd/system/kubelet.service.d /etc/kubernetes/manifests/

# 所有节点配置kubelet service
[root@k8s-master01 kubernetes]# vim  /usr/lib/systemd/system/kubelet.service
[Unit]
Descriptinotallow=Kubernetes Kubelet
Documentatinotallow=https://github.com/kubernetes/kubernetes

[Service]
ExecStart=/usr/local/bin/kubelet

Restart=always
StartLimitInterval=0
RestartSec=10

[Install]
WantedBy=multi-user.target

# 所有节点配置kubelet service的配置文件（也可以写到kubelet.service）
[root@k8s-master01 kubernetes]# vim /etc/systemd/system/kubelet.service.d/10-kubelet.conf

[Service]
Envirnotallow="KUBELET_KUBECONFIG_ARGS=--bootstrap-kubecnotallow=/etc/kubernetes/bootstrap-kubelet.kubeconfig --kubecnotallow=/etc/kubernetes/kubelet.kubeconfig"
Envirnotallow="KUBELET_SYSTEM_ARGS=--container-runtime=remote --runtime-request-timeout=15m --container-runtime-endpoint=unix:///run/containerd/containerd.sock"
Envirnotallow="KUBELET_CONFIG_ARGS=--cnotallow=/etc/kubernetes/kubelet-conf.yml"
Envirnotallow="KUBELET_EXTRA_ARGS=--node-labels=node.kubernetes.io/node='' "
ExecStart=
ExecStart=/usr/local/bin/kubelet $KUBELET_KUBECONFIG_ARGS $KUBELET_CONFIG_ARGS $KUBELET_SYSTEM_ARGS $KUBELET_EXTRA_ARGS

# 创建kubelet的配置文件
注意：如果更改了k8s的service网段，需要更改kubelet-conf.yml 的clusterDNS:配置，改成k8s Service网段的第十个地址，比如10.96.0.10
[root@k8s-master01 kubernetes]# vim /etc/kubernetes/kubelet-conf.yml
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


[root@k8s-master01 kubernetes]# systemctl daemon-reload && systemctl enable --now 
[root@k8s-master01 kubernetes]# systemctl status kubelet

7-3、kube-proxy配置

注意，如果不是高可用集群，192.168.100.99:8443改为master01的地址，8443改为apiserver的端口，默认是6443

# 以下操作只在Master01执行
[root@k8s-master01 kubernetes]# cd /root/k8s-ha-install
[root@k8s-master01 k8s-ha-install]# kubectl -n kube-system create serviceaccount kube-proxy

[root@k8s-master01 k8s-ha-install]# kubectl create clusterrolebinding system:kube-proxy         --clusterrole system:node-proxier         --serviceaccount kube-system:kube-proxy

[root@k8s-master01 k8s-ha-install]# SECRET=$(kubectl -n kube-system get sa/kube-proxy \
 --output=jsnotallow='{.secrets[0].name}')

[root@k8s-master01 k8s-ha-install]# JWT_TOKEN=$(kubectl -n kube-system get secret/$SECRET \
 --output=jsnotallow='{.data.token}' | base64 -d)

[root@k8s-master01 k8s-ha-install]# PKI_DIR=/etc/kubernetes/pki

[root@k8s-master01 k8s-ha-install]# K8S_DIR=/etc/kubernetes

[root@k8s-master01 k8s-ha-install]#  kubectl config set-cluster kubernetes     --certificate-authority=/etc/kubernetes/pki/ca.pem     --embed-certs=true     --server=https://192.168.100.99:8443     --kubecnotallow=${K8S_DIR}/kube-proxy.kubeconfig

[root@k8s-master01 k8s-ha-install]# kubectl config set-credentials kubernetes     --token=${JWT_TOKEN}     --kubecnotallow=/etc/kubernetes/kube-proxy.kubeconfig

[root@k8s-master01 k8s-ha-install]# kubectl config set-context kubernetes     --cluster=kubernetes     --user=kubernetes     --kubecnotallow=/etc/kubernetes/kube-proxy.kubeconfig

[root@k8s-master01 k8s-ha-install]# kubectl config use-context kubernetes     --kubecnotallow=/etc/kubernetes/kube-proxy.kubeconfig

# 将kubeconfig发送至其他节点
[root@k8s-master01 k8s-ha-install]# for NODE in k8s-master02 k8s-master03; do
scp /etc/kubernetes/kube-proxy.kubeconfig  $NODE:/etc/kubernetes/kube-proxy.kubeconfig
done

[root@k8s-master01 k8s-ha-install]# for NODE in k8s-node01 k8s-node02; do
scp /etc/kubernetes/kube-proxy.kubeconfig $NODE:/etc/kubernetes/kube-proxy.kubeconfig
done

# 所有节点添加kube-proxy的配置和service文件：
[root@k8s-master01 k8s-ha-install]# vim /usr/lib/systemd/system/kube-proxy.service
[Unit]
Descriptinotallow=Kubernetes Kube Proxy
Documentatinotallow=https://github.com/kubernetes/kubernetes
After=network.target

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

Restart=always
RestartSec=10s

[Install]
WantedBy=multi-user.target


# 如果更改了集群Pod的网段，需要更改kube-proxy.yaml的clusterCIDR为自己的Pod网段：
[root@k8s-master01 k8s-ha-install]# vim /etc/kubernetes/kube-proxy.yaml
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 
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

# 所有节点启动kube-proxy
[root@k8s-master01 k8s-ha-install]# systemctl daemon-reload && systemctl enable --now kube-proxy && systemctl status kube-proxy