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Kubernetes实战指南（三十四）：高可用安装K8s集群1.20.x

2020-12-12 14:27 1166 查看

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1. 安装说明

虽然K8s 1.20版本宣布将在1.23版本之后将不再维护dockershim，意味着K8s将不直接支持Docker，不过大家不必过于担心。一是在1.23版本之前我们仍然可以使用Docker，二是dockershim肯定会有人接盘，我们同样可以使用Docker，三是Docker制作的镜像仍然可以在其他Runtime环境中使用，所以大家不必过于恐慌。

本次安装采用的是Kubeadm安装工具，安装版本是K8s 1.20+，采用的系统为CentOS 7.9，其中Master节点3台，Node节点2台，高可用工具采用HAProxy + KeepAlived，高可用架构视频讲解点我

前沿技术，快人一步，点我了解~

2. 节点规划

主机名	IP地址	角色	配置
k8s-master01 ~ 03	192.168.0.201 ~ 203	Master/Worker节点	2C2G 40G
k8s-node01 ~ 02	192.168.0.204 ~ 205	Worker节点	2C2G 40G
k8s-master-lb	192.168.0.236	VIP	VIP不占用机器

信息	备注
系统版本	CentOS 7.9
Docker版本	19.03.x
K8s版本	1.20.x
Pod网段	172.168.0.0/16
Service网段	10.96.0.0/12

3. 基本配置

所有节点配置hosts

[root@k8s-master01 ~]# cat /etc/hosts
192.168.0.201 k8s-master01
192.168.0.202 k8s-master02
192.168.0.203 k8s-master03
192.168.0.236 k8s-master-lb # 如果不是高可用集群，该IP为Master01的IP
192.168.0.204 k8s-node01
192.168.0.205 k8s-node02

yum源配置

curl -o /etc/yum.repos.d/CentOS-Base.repo https://mirrors.aliyun.com/repo/Centos-7.repo
yum install -y yum-utils device-mapper-persistent-data lvm2
yum-config-manager --add-repo https://mirrors.aliyun.com/docker-ce/linux/centos/docker-ce.repo
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=1
repo_gpgcheck=1
gpgkey=https://mirrors.aliyun.com/kubernetes/yum/doc/yum-key.gpg https://mirrors.aliyun.com/kubernetes/yum/doc/rpm-package-key.gpg
EOF
sed -i -e '/mirrors.cloud.aliyuncs.com/d' -e '/mirrors.aliyuncs.com/d' /etc/yum.repos.d/CentOS-Base.repo

必备工具安装

yum install wget jq psmisc vim net-tools telnet yum-utils device-mapper-persistent-data lvm2 git -y

成为K8s架构师只需一步，点我了解~

所有节点关闭防火墙、selinux、dnsmasq、swap。服务器配置如下：

systemctl disable --now firewalld
systemctl disable --now dnsmasq
systemctl disable --now NetworkManager

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

关闭swap分区

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

安装ntpdate

rpm -ivh http://mirrors.wlnmp.com/centos/wlnmp-release-centos.noarch.rpm
yum install ntpdate -y

所有节点同步时间。时间同步配置如下：

ln -sf /usr/share/zoneinfo/Asia/Shanghai /etc/localtime
echo 'Asia/Shanghai' >/etc/timezone
ntpdate time2.aliyun.com

加入到crontab

*/5 * * * * ntpdate time2.aliyun.com

所有节点配置limit：

ulimit -SHn 65535

vim /etc/security/limits.conf
# 末尾添加如下内容
* soft nofile 655360
* hard nofile 131072
* soft nproc 655350
* hard nproc 655350
* soft memlock unlimited
* hard memlock unlimited

Master01节点免密钥登录其他节点：

ssh-keygen -t rsa
for i in k8s-master01 k8s-master02 k8s-master03 k8s-node01 k8s-node02;do ssh-copy-id -i .ssh/id_rsa.pub $i;done

下载安装所有的源码文件：

cd /root/ ; git clone https://github.com/dotbalo/k8s-ha-install.git

所有节点升级系统并重启：

yum update -y  && reboot

掌握K8s就是掌握云计算的未来，点我了解~

4. 内核配置

所有节点安装ipvsadm：

yum install ipvsadm ipset sysstat conntrack libseccomp -y

所有节点配置ipvs模块

vim /etc/modules-load.d/ipvs.conf
# 加入以下内容
ip_vs
ip_vs_lc
ip_vs_wlc
ip_vs_rr
ip_vs_wrr
ip_vs_lblc
ip_vs_lblcr
ip_vs_dh
ip_vs_sh
ip_vs_fo
ip_vs_nq
ip_vs_sed
ip_vs_ftp
ip_vs_sh
nf_conntrack_ipv4
ip_tables
ip_set
xt_set
ipt_set
ipt_rpfilter
ipt_REJECT
ipip

加载内核配置

systemctl enable --now systemd-modules-load.service

开启一些k8s集群中必须的内核参数，所有节点配置k8s内核

cat <<EOF > /etc/sysctl.d/k8s.conf
net.ipv4.ip_forward = 1
net.bridge.bridge-nf-call-iptables = 1
net.bridge.bridge-nf-call-ip6tables = 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
EOF
sysctl --system

5. 基本组件安装

所有节点安装Docker-ce 19.03

yum install docker-ce-19.03.* -y

所有节点设置开机自启动Docker

systemctl daemon-reload && systemctl enable --now docker

安装k8s组件

yum list kubeadm.x86_64 --showduplicates | sort -r

所有节点安装最新版本kubeadm

yum install kubeadm -y

默认配置的pause镜像使用gcr.io仓库，国内可能无法访问，所以这里配置Kubelet使用阿里云的pause镜像：

cat >/etc/sysconfig/kubelet<<EOF
KUBELET_EXTRA_ARGS="--pod-infra-container-image=registry.cn-hangzhou.aliyuncs.com/google_containers/pause-amd64:3.2"
EOF

设置Kubelet开机自启动

systemctl daemon-reload
systemctl enable --now kubelet

高薪职业，永不失业，点我了解~

6. 高可用组件安装

注意：如果不是高可用集群或者在云上安装，haproxy和keepalived无需安装
所有Master节点通过yum安装HAProxy和KeepAlived：

yum install keepalived haproxy -y

所有Master节点配置HAProxy（详细配置参考HAProxy文档，所有Master节点的HAProxy配置相同）：

[root@k8s-master01 etc]# mkdir /etc/haproxy
[root@k8s-master01 etc]# 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 monitor-in
bind *:33305
mode http
option httplog
monitor-uri /monitor

frontend k8s-master
bind 0.0.0.0:16443
bind 127.0.0.1:16443
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   192.168.0.201:6443  check
server k8s-master02   192.168.0.202:6443  check
server k8s-master03   192.168.0.203:6443  check

所有Master节点配置KeepAlived，配置不一样，注意区分
注意每个节点的IP和网卡（interface参数）
Master01节点的配置：

[root@k8s-master01 etc]# mkdir /etc/keepalived

[root@k8s-master01 ~]# vim /etc/keepalived/keepalived.conf
! Configuration File for keepalived
global_defs {
router_id LVS_DEVEL
script_user root
enable_script_security
}
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 ens192
mcast_src_ip 192.168.0.201
virtual_router_id 51
priority 101
advert_int 2
authentication {
auth_type PASS
auth_pass K8SHA_KA_AUTH
}
virtual_ipaddress {
192.168.0.236
}
#    track_script {
#       chk_apiserver
#    }
}

Master02节点的配置：

! Configuration File for keepalived
global_defs {
router_id LVS_DEVEL
script_user root
enable_script_security
}
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 ens192
mcast_src_ip 192.168.0.202
virtual_router_id 51
priority 100
advert_int 2
authentication {
auth_type PASS
auth_pass K8SHA_KA_AUTH
}
virtual_ipaddress {
192.168.0.236
}
#    track_script {
#       chk_apiserver
#    }
}

Master03节点的配置：

! Configuration File for keepalived
global_defs {
router_id LVS_DEVEL
script_user root
enable_script_security
}
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 ens192
mcast_src_ip 192.168.0.203
virtual_router_id 51
priority 100
advert_int 2
authentication {
auth_type PASS
auth_pass K8SHA_KA_AUTH
}
virtual_ipaddress {
192.168.0.236
}
#    track_script {
#       chk_apiserver
#    }
}

注意上述的健康检查是关闭的，集群建立完成后再开启：

#    track_script {
#       chk_apiserver
#    }

配置KeepAlived健康检查文件：

[root@k8s-master01 keepalived]# cat /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

chmod +x /etc/keepalived/check_apiserver.sh
启动haproxy和keepalived
[root@k8s-master01 keepalived]# systemctl daemon-reload
[root@k8s-master01 keepalived]# systemctl enable --now haproxy
[root@k8s-master01 keepalived]# systemctl enable --now keepalived

测试VIP

[root@k8s-master01 ~]# ping 192.168.0.236 -c 4
PING 192.168.0.236 (192.168.0.236) 56(84) bytes of data.
64 bytes from 192.168.0.236: icmp_seq=1 ttl=64 time=0.464 ms
64 bytes from 192.168.0.236: icmp_seq=2 ttl=64 time=0.063 ms
64 bytes from 192.168.0.236: icmp_seq=3 ttl=64 time=0.062 ms
64 bytes from 192.168.0.236: icmp_seq=4 ttl=64 time=0.063 ms

方向比努力更重要，点我了解~

7. 集群初始化

Master01节点创建new.yaml配置文件如下：

apiVersion: kubeadm.k8s.io/v1beta2
bootstrapTokens:
- groups:
- system:bootstrappers:kubeadm:default-node-token
token: 7t2weq.bjbawausm0jaxury
ttl: 24h0m0s
usages:
- signing
- authentication
kind: InitConfiguration
localAPIEndpoint:
advertiseAddress: 192.168.0.201
bindPort: 6443
nodeRegistration:
criSocket: /var/run/dockershim.sock
name: k8s-master01
taints:
- effect: NoSchedule
key: node-role.kubernetes.io/master
---
apiServer:
certSANs:
- 192.168.0.236
timeoutForControlPlane: 4m0s
apiVersion: kubeadm.k8s.io/v1beta2
certificatesDir: /etc/kubernetes/pki
clusterName: kubernetes
controlPlaneEndpoint: 192.168.0.236:16443
controllerManager: {}
dns:
type: CoreDNS
etcd:
local:
dataDir: /var/lib/etcd
imageRepository: registry.cn-hangzhou.aliyuncs.com/google_containers
kind: ClusterConfiguration
kubernetesVersion: v1.20.0
networking:
dnsDomain: cluster.local
podSubnet: 172.168.0.0/16
serviceSubnet: 10.96.0.0/12
scheduler: {}

注意：如果不是高可用集群，192.168.0.236:16443改为master01的地址，16443改为apiserver的端口，默认是6443，注意更改v1.20.0为自己服务器kubeadm的版本：kubeadm version
将new.yaml文件复制到其他master节点，之后所有Master节点提前下载镜像，可以节省初始化时间：

kubeadm config images pull --config /root/new.yaml

所有节点设置开机自启动kubelet

systemctl enable --now kubelet（如果启动失败无需管理，初始化成功以后即可启动）

Master01节点初始化，初始化以后会在/etc/kubernetes目录下生成对应的证书和配置文件，之后其他Master节点加入Master01即可：

kubeadm init --config /root/new.yaml  --upload-certs

初始化成功以后，会产生Token值，用于其他节点加入时使用，因此要记录下初始化成功生成的token值（令牌值）：

Your Kubernetes control-plane has initialized successfully!

To start using your cluster, you need to run the following as a regular user:

mkdir -p $HOME/.kube
sudo cp -i /etc/kubernetes/admin.conf $HOME/.kube/config
sudo chown $(id -u):$(id -g) $HOME/.kube/config

Alternatively, if you are the root user, you can run:

export KUBECONFIG=/etc/kubernetes/admin.conf

You should now deploy a pod network to the cluster.
Run "kubectl apply -f [podnetwork].yaml" with one of the options listed at:
https://kubernetes.io/docs/concepts/cluster-administration/addons/

You can now join any number of the control-plane node running the following command on each as root:

kubeadm join 192.168.0.236:16443 --token 7t2weq.bjbawausm0jaxury \
--discovery-token-ca-cert-hash sha256:8c92ecb336be2b9372851a9af2c7ca1f7f60c12c68f6ffe1eb513791a1b8a908 \
--control-plane --certificate-key ac2854de93aaabdf6dc440322d4846fc230b290c818c32d6ea2e500fc930b0aa

Please note that the certificate-key gives access to cluster sensitive data, keep it secret!
As a safeguard, uploaded-certs will be deleted in two hours; If necessary, you can use
"kubeadm init phase upload-certs --upload-certs" to reload certs afterward.

Then you can join any number of worker nodes by running the following on each as root:

kubeadm join 192.168.0.236:16443 --token 7t2weq.bjbawausm0jaxury \
--discovery-token-ca-cert-hash sha256:8c92ecb336be2b9372851a9af2c7ca1f7f60c12c68f6ffe1eb513791a1b8a908

Master01节点配置环境变量，用于访问Kubernetes集群：

cat <<EOF >> /root/.bashrc
export KUBECONFIG=/etc/kubernetes/admin.conf
EOF
source /root/.bashrc

查看节点状态：

[root@k8s-master01 ~]# kubectl get nodes
NAME           STATUS     ROLES                  AGE   VERSION
k8s-master01   NotReady   control-plane,master   74s   v1.20.0

采用初始化安装方式，所有的系统组件均以容器的方式运行并且在kube-system命名空间内，此时可以查看Pod状态：

[root@k8s-master01 ~]# kubectl get pods -n kube-system -o wide
NAME                                   READY     STATUS    RESTARTS   AGE       IP              NODE
coredns-777d78ff6f-kstsz               0/1       Pending   0          14m       <none>          <none>
coredns-777d78ff6f-rlfr5               0/1       Pending   0          14m       <none>          <none>
etcd-k8s-master01                      1/1       Running   0          14m       192.168.0.201   k8s-master01
kube-apiserver-k8s-master01            1/1       Running   0          13m       192.168.0.201   k8s-master01
kube-controller-manager-k8s-master01   1/1       Running   0          13m       192.168.0.201   k8s-master01
kube-proxy-8d4qc                       1/1       Running   0          14m       192.168.0.201   k8s-master01
kube-scheduler-k8s-master01            1/1       Running   0          13m       192.168.0.201   k8s-master01

8. 高可用Master

初始化其他master加入集群

kubeadm join 192.168.0.236:16443 --token 7t2weq.bjbawausm0jaxury \
--discovery-token-ca-cert-hash sha256:8c92ecb336be2b9372851a9af2c7ca1f7f60c12c68f6ffe1eb513791a1b8a908 \
--control-plane --certificate-key ac2854de93aaabdf6dc440322d4846fc230b290c818c32d6ea2e500fc930b0aa

9. 添加Node节点

kubeadm join 192.168.0.236:16443 --token 7t2weq.bjbawausm0jaxury \
--discovery-token-ca-cert-hash sha256:8c92ecb336be2b9372851a9af2c7ca1f7f60c12c68f6ffe1eb513791a1b8a908

查看集群状态：

[root@k8s-master01]# kubectl  get node
NAME           STATUS     ROLES                  AGE     VERSION
k8s-master01   NotReady   control-plane,master   8m53s   v1.20.0
k8s-master02   NotReady   control-plane,master   2m25s   v1.20.0
k8s-master03   NotReady   control-plane,master   31s     v1.20.0
k8s-node01     NotReady   <none>                 32s     v1.20.0
k8s-node02     NotReady   <none>                 88s     v1.20.0

10. Calico安装

K8s架构师学习路径，点我了解~

以下步骤只在master01执行

cd /root/k8s-ha-install && git checkout manual-installation-v1.20.x && cd calico/

修改calico-etcd.yaml的以下位置

sed -i 's#etcd_endpoints: "http://<ETCD_IP>:<ETCD_PORT>"#etcd_endpoints: "https://192.168.0.201:2379,https://192.168.0.202:2379,https://192.168.0.203:2379"#g' calico-etcd.yaml

ETCD_CA=`cat /etc/kubernetes/pki/etcd/ca.crt | base64 | tr -d '\n'`
ETCD_CERT=`cat /etc/kubernetes/pki/etcd/server.crt | base64 | tr -d '\n'`
ETCD_KEY=`cat /etc/kubernetes/pki/etcd/server.key | base64 | tr -d '\n'`
sed -i "s@# etcd-key: null@etcd-key: ${ETCD_KEY}@g; s@# etcd-cert: null@etcd-cert: ${ETCD_CERT}@g; s@# etcd-ca: null@etcd-ca: ${ETCD_CA}@g" calico-etcd.yaml

sed -i 's#etcd_ca: ""#etcd_ca: "/calico-secrets/etcd-ca"#g; s#etcd_cert: ""#etcd_cert: "/calico-secrets/etcd-cert"#g; s#etcd_key: "" #etcd_key: "/calico-secrets/etcd-key" #g' calico-etcd.yaml

POD_SUBNET=`cat /etc/kubernetes/manifests/kube-controller-manager.yaml | grep cluster-cidr= | awk -F= '{print $NF}'`

sed -i 's@# - name: CALICO_IPV4POOL_CIDR@- name: CALICO_IPV4POOL_CIDR@g; s@#   value: "192.168.0.0/16"@  value: '"${POD_SUBNET}"'@g' calico-etcd.yaml

创建calico

kubectl apply -f calico-etcd.yaml

11. Metrics Server部署

在新版的Kubernetes中系统资源的采集均使用Metrics-server，可以通过Metrics采集节点和Pod的内存、磁盘、CPU和网络的使用率。
将Master01节点的front-proxy-ca.crt复制到所有Node节点

scp /etc/kubernetes/pki/front-proxy-ca.crt k8s-node01:/etc/kubernetes/pki/front-proxy-ca.crt
scp /etc/kubernetes/pki/front-proxy-ca.crt k8s-node(其他节点自行拷贝):/etc/kubernetes/pki/front-proxy-ca.crt

安装metrics server

cd /root/k8s-ha-install/metrics-server-0.4.x-kubeadm/

[root@k8s-master01 metrics-server-0.4.x-kubeadm]# kubectl  create -f comp.yaml
serviceaccount/metrics-server cr
8000
eated
clusterrole.rbac.authorization.k8s.io/system:aggregated-metrics-reader created
clusterrole.rbac.authorization.k8s.io/system:metrics-server created
rolebinding.rbac.authorization.k8s.io/metrics-server-auth-reader created
clusterrolebinding.rbac.authorization.k8s.io/metrics-server:system:auth-delegator created
clusterrolebinding.rbac.authorization.k8s.io/system:metrics-server created
service/metrics-server created
deployment.apps/metrics-server created
apiservice.apiregistration.k8s.io/v1beta1.metrics.k8s.io created

等待kube-system命令空间下的Pod全部启动后，查看状态

[root@k8s-master01 metrics-server-0.4.x-kubeadm]# kubectl  top node
NAME           CPU(cores)   CPU%   MEMORY(bytes)   MEMORY%
k8s-master01   109m         2%     1296Mi          33%
k8s-master02   99m          2%     1124Mi          29%
k8s-master03   104m         2%     1082Mi          28%
k8s-node01     55m          1%     761Mi           19%
k8s-node02     53m          1%     663Mi           17%

12. Dashboard部署

cd /root/k8s-ha-install/dashboard/

[root@k8s-master01 dashboard]# kubectl  create -f .
serviceaccount/admin-user created
clusterrolebinding.rbac.authorization.k8s.io/admin-user created
namespace/kubernetes-dashboard created
serviceaccount/kubernetes-dashboard created
service/kubernetes-dashboard created
secret/kubernetes-dashboard-certs created
secret/kubernetes-dashboard-csrf created
secret/kubernetes-dashboard-key-holder created
configmap/kubernetes-dashboard-settings created
role.rbac.authorization.k8s.io/kubernetes-dashboard created
clusterrole.rbac.authorization.k8s.io/kubernetes-dashboard created
rolebinding.rbac.authorization.k8s.io/kubernetes-dashboard created
clusterrolebinding.rbac.authorization.k8s.io/kubernetes-dashboard created
deployment.apps/kubernetes-dashboard created
service/dashboard-metrics-scraper created
deployment.apps/dashboard-metrics-scraper created

在谷歌浏览器（Chrome）启动文件中加入启动参数，用于解决无法访问Dashboard的问题，参考图：

--test-type --ignore-certificate-errors

更改dashboard的svc为NodePort：

kubectl edit svc kubernetes-dashboard -n kubernetes-dashboard

将ClusterIP更改为NodePort（如果已经为NodePort忽略此步骤）：
查看端口号：

根据自己的实例端口号，通过任意安装了kube-proxy的宿主机或者VIP的IP+端口即可访问到dashboard：
访问Dashboard：https://192.168.0.236:18282（请更改18282为自己的端口），选择登录方式为令牌（即token方式）

查看token值：

[root@k8s-master01 1.1.1]# kubectl -n kube-system describe secret $(kubectl -n kube-system get secret | grep admin-user | awk '{print $1}')
Name:         admin-user-token-r4vcp
Namespace:    kube-system
Labels:       <none>
Annotations:  kubernetes.io/service-account.name: admin-user
kubernetes.io/service-account.uid: 2112796c-1c9e-11e9-91ab-000c298bf023

Type:  kubernetes.io/service-account-token

Data
====
ca.crt:     1025 bytes
namespace:  11 bytes
token:      eyJhbGciOiJSUzI1NiIsImtpZCI6IiJ9.eyJpc3MiOiJrdWJlcm5ldGVzL3NlcnZpY2VhY2NvdW50Iiwia3ViZXJuZXRlcy5pby9zZXJ2aWNlYWNjb3VudC9uYW1lc3BhY2UiOiJrdWJlLXN5c3RlbSIsImt1YmVybmV0ZXMuaW8vc2VydmljZWFjY291bnQvc2VjcmV0Lm5hbWUiOiJhZG1pbi11c2VyLXRva2VuLXI0dmNwIiwia3ViZXJuZXRlcy5pby9zZXJ2aWNlYWNjb3VudC9zZXJ2aWNlLWFjY291bnQubmFtZSI6ImFkbWluLXVzZXIiLCJrdWJlcm5ldGVzLmlvL3NlcnZpY2VhY2NvdW50L3NlcnZpY2UtYWNjb3VudC51aWQiOiIyMTEyNzk2Yy0xYzllLTExZTktOTFhYi0wMDBjMjk4YmYwMjMiLCJzdWIiOiJzeXN0ZW06c2VydmljZWFjY291bnQ6a3ViZS1zeXN0ZW06YWRtaW4tdXNlciJ9.bWYmwgRb-90ydQmyjkbjJjFt8CdO8u6zxVZh-19rdlL_T-n35nKyQIN7hCtNAt46u6gfJ5XXefC9HsGNBHtvo_Ve6oF7EXhU772aLAbXWkU1xOwQTQynixaypbRIas_kiO2MHHxXfeeL_yYZRrgtatsDBxcBRg-nUQv4TahzaGSyK42E_4YGpLa3X3Jc4t1z0SQXge7lrwlj8ysmqgO4ndlFjwPfvg0eoYqu9Qsc5Q7tazzFf9mVKMmcS1ppPutdyqNYWL62P1prw_wclP0TezW1CsypjWSVT4AuJU8YmH8nTNR1EXn8mJURLSjINv6YbZpnhBIPgUGk1JYVLcn47w

将token值输入到令牌后，单击登录即可访问Dashboard

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Kubernetes实战指南（三十四）： 高可用安装K8s集群1.20.x