部署一套完整的企业级K8s集群

2021-05-10阅读 1520

目录

部署一套完整的企业级K8s集群

一、准备环境

二、部署Nginx+Keepalived高可用负载均衡器

2.1安装软件包(主/备)

2.2 Nginx配置文件(主/备一样)

2.3 keepalived配置文件(Nginx Master)

2.4 keepalived配置文件(Nginx Backup)

2.5 启动并设置开机启动

2.6 查看keepalived工作状态

2.7 Nginx+Keepalived高可用测试

三、部署Etcd集群

3.1 准备cfssl证书生成工具

3.2 生成Etcd证书

2、使用自签CA签发Etcd HTTPS证书

3.3 从Github下载二进制文件

3.4 部署Etcd集群

四、安装Docker/kubeadm/kubelet【所有节点】

4.1 安装Docker

4.2 添加阿里云YUM软件源

4.3 安装kubeadm,kubelet和kubectl

五、部署Kubernetes Master

5.1 初始化Master1

5.2 初始化Master2、Master3

5.3 访问负载均衡器测试

六、加入Kubernetes Node

七、部署网络组件

八、部署 Dashboard


部署一套完整的企业级K8s集群

一、准备环境

服务器要求:

• 建议最小硬件配置:4核CPU、4G内存、50G硬盘

• 服务器最好可以访问外网,会有从网上拉取镜像需求,如果服务器不能上网,需要提前下载对应镜像并导入节点

软件环境:

软件

版本

操作系统

CentOS7.8_x64

Docker

19+

Kubernetes

1.20

服务器整体规划:

角色

IP

其他单装组件

k8s-master1

192.168.1.1

docker,etcd,nginx,keepalived

k8s-master2

192.168.1.2

docker,etcd,nginx,keepalived

k8s-master3

192.168.1.3

docker,etcd,nginx,keepalived

k8s-node1

192.168.1.4

docker

负载均衡器对外IP

192.168.1.88 (VIP)

操作系统初始化配置

# 关闭防火墙

systemctl stop firewalld

systemctl disable firewalld

# 关闭selinux

sed -i 's/enforcing/disabled/' /etc/selinux/config  # 永久

setenforce 0  # 临时

# 关闭swap

swapoff -a  # 临时

sed -ri 's/.*swap.*/#&/' /etc/fstab    # 永久

# 根据规划设置主机名

hostnamectl set-hostname <hostname>

# 在master添加hosts

cat >> /etc/hosts << EOF192.168.1.1 k8s-master1192.168.1.2 k8s-master2192.168.1.3 k8s-master3192.168.1.4 k8s-node1

EOF

# 将桥接的IPv4流量传递到iptables的链

cat > /etc/sysctl.d/k8s.conf << EOF

net.bridge.bridge-nf-call-ip6tables = 1

net.bridge.bridge-nf-call-iptables = 1

EOF

sysctl --system  # 生效

# 时间同步

yum install ntpdate -y

ntpdate time.windows.com

二、部署Nginx+Keepalived高可用负载均衡

架构图:

2.1安装软件包(主/备)

 yum install epel-release -y

 yum install nginx keepalived -y

2.2 Nginx配置文件(主/备一样)

cat > /etc/nginx/nginx.conf << "EOF"

user nginx;

worker_processes auto;

error_log /var/log/nginx/error.log;

pid /run/nginx.pid;

include /usr/share/nginx/modules/*.conf;

events {

    worker_connections 1024;

}

# 四层负载均衡,为两台Master apiserver组件提供负载均衡

stream {

    log_format  main  '$remote_addr $upstream_addr - [$time_local] $status $upstream_bytes_sent';

    access_log  /var/log/nginx/k8s-access.log  main;

    upstream k8s-apiserver {

       server 192.168.1.1:6443;   # Master1 APISERVER IP:PORT

       server 192.168.1.2:6443;   # Master2 APISERVER IP:PORT

       server 192.168.1.3:6443;   # Master3 APISERVER IP:PORT

    }

    

    server {

       listen 16443;  # 由于nginx与master节点复用,这个监听端口不能是6443,否则会冲突

       proxy_pass k8s-apiserver;

    }

}

http {

    log_format  main  '$remote_addr - $remote_user [$time_local] "$request" '

                      '$status $body_bytes_sent "$http_referer" '

                      '"$http_user_agent" "$http_x_forwarded_for"';

    access_log  /var/log/nginx/access.log  main;

    sendfile            on;

    tcp_nopush          on;

    tcp_nodelay         on;

    keepalive_timeout   65;

    types_hash_max_size 2048;

    include             /etc/nginx/mime.types;

    default_type        application/octet-stream;

    server {

        listen       80 default_server;

        server_name  _;

        location / {

        }

    }

}

EOF

2.3 keepalived配置文件(Nginx Master)

cat > /etc/keepalived/keepalived.conf << EOF

global_defs {

   notification_email {

     acassen@firewall.loc

     failover@firewall.loc

     sysadmin@firewall.loc

   }

   notification_email_from Alexandre.Cassen@firewall.loc  

   smtp_server 127.0.0.1 

   smtp_connect_timeout 30 

   router_id NGINX_MASTER}

vrrp_script check_nginx {

    script "/etc/keepalived/check_nginx.sh"}

vrrp_instance VI_1 {

    state MASTER

    interface eno16780032  # 修改为实际网卡名

    virtual_router_id 51 # VRRP 路由 ID实例,每个实例是唯一的

    priority 100    # 优先级,备服务器设置 90 80

    advert_int 1    # 指定VRRP 心跳包通告间隔时间,默认1

    authentication {

        auth_type PASS      

        auth_pass 1111 

    }  

    # 虚拟IP

    virtual_ipaddress {

        192.168.1.88/24

    }

    track_script {

        check_nginx

    } }

EOF

准备上述配置文件中检查nginx运行状态的脚本:

cat > /etc/keepalived/check_nginx.sh  << "EOF"

#!/bin/bash

count=$(ss -antp |grep 16443 |egrep -cv "grep|$$")

if [ "$count" -eq 0 ];then

    exit 1else

    exit 0

fi

EOF

赋权限:

chmod +x /etc/keepalived/check_nginx.sh

2.4 keepalived配置文件(Nginx Backup)

cat > /etc/keepalived/keepalived.conf << EOF

global_defs {

   notification_email {

     acassen@firewall.loc

     failover@firewall.loc

     sysadmin@firewall.loc

   }

   notification_email_from Alexandre.Cassen@firewall.loc  

   smtp_server 127.0.0.1 

   smtp_connect_timeout 30 

   router_id NGINX_BACKUP}

vrrp_script check_nginx {

    script "/etc/keepalived/check_nginx.sh"}

vrrp_instance VI_1 {

    state BACKUP

    interface eno16780032

    virtual_router_id 51  

    priority 90  #注意优先级

    advert_int 1

    authentication {

        auth_type PASS      

        auth_pass 1111 

    }  

    virtual_ipaddress {

        192.168.1.88/24

    }

    track_script {

        check_nginx

    } }

EOF

准备上述配置文件中检查nginx运行状态的脚本:

cat > /etc/keepalived/check_nginx.sh  << "EOF"

#!/bin/bash

count=$(ss -antp |grep 16443 |egrep -cv "grep|$$")

if [ "$count" -eq 0 ];then

    exit 1else

    exit 0

fi

EOF

赋权限:

chmod +x /etc/keepalived/check_nginx.sh

注:keepalived根据脚本返回状态码(0为工作正常,非0不正常)判断是否故障转移。

2.5 启动并设置开机启动

systemctl daemon-reload

systemctl start nginx ; systemctl enable nginx

systemctl status nginx

systemctl start keepalived ; systemctl enable keepalived

systemctl status keepalived

2.6 查看keepalived工作状态

ip addr

2: eno16780032: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP group default qlen 1000

    link/ether 00:0c:29:04:f7:2c brd ff:ff:ff:ff:ff:ff

    inet 192.168.1.1/24 brd 192.168.1.255 scope global noprefixroute eno16780032

       valid_lft forever preferred_lft forever

    inet 192.168.1.88/24 scope global secondary eno16780032

       valid_lft forever preferred_lft forever

可以看到,在eno16780032网卡绑定了192.168.1.88 虚拟IP,说明工作正常。

2.7 Nginx+Keepalived高可用测试

关闭主节点Nginx,测试VIP是否漂移到备节点服务器。

在Nginx Master执行 pkill nginx

在Nginx Backup,ip addr命令查看已成功绑定VIP。

三、部署Etcd集群

Etcd 是一个分布式键值存储系统,Kubernetes使用Etcd进行数据存储,kubeadm搭建默认情况下只启动一个Etcd Pod,存在单点故障,生产环境强烈不建议,所以我们这里使用3台服务器组建集群,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。

节点名称

IP

etcd-1

192.168.1.1

etcd-2

192.168.1.2

etcd-3

192.168.1.3

注:为了节省机器,这里与K8s节点机器复用。也可以独立于k8s集群之外部署,只要apiserver能连接到就行。

3.1 准备cfssl证书生成工具

cfssl是一个开源的证书管理工具,使用json文件生成证书,相比openssl更方便使用。

找任意一台服务器操作,这里用Master节点。

wget https://pkg.cfssl.org/R1.2/cfssl_linux-amd64

wget https://pkg.cfssl.org/R1.2/cfssljson_linux-amd64

wget https://pkg.cfssl.org/R1.2/cfssl-certinfo_linux-amd64

下载:

链接:https://pan.baidu.com/s/1HkVnrk1BIEtwUunDiRRy9Q

提取码:g6cx

chmod +x cfssl_linux-amd64 cfssljson_linux-amd64 cfssl-certinfo_linux-amd64

mv cfssl_linux-amd64 /usr/local/bin/cfssl

mv cfssljson_linux-amd64 /usr/local/bin/cfssljson

mv cfssl-certinfo_linux-amd64 /usr/bin/cfssl-certinfo

3.2 生成Etcd证书

1、自签证书颁发机构(CA)

创建工作目录:

mkdir -p ~/etcd_tls

cd ~/etcd_tls

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{

    "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。

2、使用自签CA签发Etcd HTTPS证书

创建证书申请文件:

cat > server-csr.json << EOF{

    "CN": "etcd",

    "hosts": [

    "192.168.1.1",

    "192.168.1.2",

    "192.168.1.3"

    ],

    "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。

3.3 从Github下载二进制文件

下载地址:https://github.com/etcd-io/etcd/releases/download/v3.4.9/etcd-v3.4.9-linux-amd64.tar.gz

链接:https://pan.baidu.com/s/17taFEWgUqAT0E7DN7J-Blw

提取码:44v4

3.4 部署Etcd集群

以下在节点1上操作,为简化操作,待会将节点1生成的所有文件拷贝到节点2和节点3。

1、创建工作目录并解压二进制包

mkdir /opt/etcd/{bin,cfg,ssl} -p

tar zxvf etcd-v3.4.9-linux-amd64.tar.gz

mv etcd-v3.4.9-linux-amd64/{etcd,etcdctl} /opt/etcd/bin/

2、创建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://192.168.1.1:2380"

ETCD_LISTEN_CLIENT_URLS="https://192.168.1.1:2379"

#[Clustering]

ETCD_INITIAL_ADVERTISE_PEER_URLS="https://192.168.1.1:2380"

ETCD_ADVERTISE_CLIENT_URLS="https://192.168.1.1:2379"

ETCD_INITIAL_CLUSTER="etcd-1=https://192.168.1.1:2380,etcd-2=https://192.168.1.2:2380,etcd-3=https://192.168.1.3:2380"

ETCD_INITIAL_CLUSTER_TOKEN="etcd-cluster"

ETCD_INITIAL_CLUSTER_STATE="new"

EOF

3、配置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

4、拷贝刚才生成的证书

cp ~/etcd_tls/ca*pem ~/etcd_tls/server*pem /opt/etcd/ssl/

5、启动并设置开机启动(三个节点添加之后可以正常启动)

systemctl daemon-reload

systemctl start etcd ; systemctl enable etcd

6、将上面节点1所有生成的文件拷贝到节点2和节点3

scp -r /opt/etcd/ root@192.168.1.2:/opt/

scp /usr/lib/systemd/system/etcd.service root@192.168.1.2:/usr/lib/systemd/system/

scp -r /opt/etcd/ root@192.168.1.3:/opt/

scp /usr/lib/systemd/system/etcd.service root@192.168.1.3:/usr/lib/systemd/system/

然后在节点2和节点3分别修改etcd.conf配置文件中的节点名称和当前服务器IP:

vim /opt/etcd/cfg/etcd.conf

#[Member]

ETCD_NAME="etcd-1"   # 修改此处,节点2改为etcd-2,节点3改为etcd-3

ETCD_DATA_DIR="/var/lib/etcd/default.etcd"

ETCD_LISTEN_PEER_URLS="https://192.168.31.71:2380"   # 修改此处为当前服务器IP

ETCD_LISTEN_CLIENT_URLS="https://192.168.31.71:2379" # 修改此处为当前服务器IP

#[Clustering]

ETCD_INITIAL_ADVERTISE_PEER_URLS="https://192.168.31.71:2380" # 修改此处为当前服务器IP

ETCD_ADVERTISE_CLIENT_URLS="https://192.168.31.71:2379" # 修改此处为当前服务器IP

ETCD_INITIAL_CLUSTER="etcd-1=https://192.168.31.71:2380,etcd-2=https://192.168.31.72:2380,etcd-3=https://192.168.31.73:2380"

ETCD_INITIAL_CLUSTER_TOKEN="etcd-cluster"

ETCD_INITIAL_CLUSTER_STATE="new"

启动etcd并设置开机启动。

systemctl daemon-reload

systemctl start etcd ; systemctl enable etcd

7、查看集群状态

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://192.168.1.1:2379,https://192.168.1.2:2379,https://192.168.1.3:2379" endpoint health --write-out=table

结果展示为一下表示正常:

+----------------------------+--------+-------------+-------+|          ENDPOINT    | HEALTH |    TOOK     | ERROR |+----------------------------+--------+-------------+-------+| https://192.168.1.1:2379 |   true | 10.301506ms |    || https://192.168.1.3:2379 |   true | 12.87467ms |     || https://192.168.1.2:2379 |   true | 13.225954ms |    |+----------------------------+--------+-------------+-------+

如果有问题第一步先看日志:/var/log/message 或 journalctl -u etcd

四、安装Docker/kubeadm/kubelet【所有节点】

4.1 安装Docker

wget https://mirrors.aliyun.com/docker-ce/linux/centos/docker-ce.repo -O /etc/yum.repos.d/docker-ce.repo

yum -y install docker-ce

systemctl enable docker && systemctl start docker

配置镜像下载加速器:

cat > /etc/docker/daemon.json << EOF{

  "registry-mirrors": ["https://b9pmyelo.mirror.aliyuncs.com"]}

EOF

重启docker:

systemctl daemon-reload

systemctl restart docker

docker info

4.2 添加阿里云YUM软件源

cat > /etc/yum.repos.d/kubernetes.repo << EOF[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

4.3 安装kubeadm,kubelet和kubectl

这里指定版本号部署:

yum install -y kubelet-1.20.4 kubeadm-1.20.4 kubectl-1.20.4

systemctl enable kubelet

五、部署Kubernetes Master

5.1 初始化Master1

生成初始化配置文件:

cat > kubeadm-config.yaml << EOF

apiVersion: kubeadm.k8s.io/v1beta2

bootstrapTokens:- groups:

  - system:bootstrappers:kubeadm:default-node-token

  token: 9037x2.tcaqnpaqkra9vsbw

  ttl: 24h0m0s

  usages:

  - signing

  - authentication

kind: InitConfiguration

localAPIEndpoint:

  advertiseAddress: 192.168.1.1

  bindPort: 6443

nodeRegistration:

  criSocket: /var/run/dockershim.sock

  name: k8s-master1

  taints:

  - effect: NoSchedule

    key: node-role.kubernetes.io/master---

apiServer:

  certSANs:  # 包含所有Master/LB/VIP 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。

  - k8s-master1

  - k8s-master2

  - k8s-master3

  - 192.168.1.1

  - 192.168.1.2

  - 192.168.1.3

  - 127.0.0.1

  extraArgs:

    authorization-mode: Node,RBAC

  timeoutForControlPlane: 4m0s

apiVersion: kubeadm.k8s.io/v1beta2

certificatesDir: /etc/kubernetes/pki

clusterName: kubernetes

controlPlaneEndpoint: 192.168.1.88:16443 # 负载均衡虚拟IP(VIP)和端口

controllerManager: {}

dns:

  type: CoreDNS

etcd:

  external:  # 使用外部etcd

    endpoints:

    - https://192.168.1.1:2379 # etcd集群3个节点

    - https://192.168.1.2:2379

    - https://192.168.1.3:2379

    caFile: /opt/etcd/ssl/ca.pem # 连接etcd所需证书

    certFile: /opt/etcd/ssl/server.pem

    keyFile: /opt/etcd/ssl/server-key.pem

imageRepository: registry.aliyuncs.com/google_containers # 由于默认拉取镜像地址k8s.gcr.io国内无法访问,这里指定阿里云镜像仓库地址

kind: ClusterConfiguration

kubernetesVersion: v1.20.4 # K8s版本,与上面安装的一致

networking:

  dnsDomain: cluster.local

  podSubnet: 10.244.0.0/16  # Pod网络,与下面部署的CNI网络组件yaml中保持一致

  serviceSubnet: 10.96.0.0/12  # 集群内部虚拟网络,Pod统一访问入口

scheduler: {}

EOF

初始化k8s:

kubeadm init --config kubeadm-config.yaml

You can now join any number of control-plane nodes by copying certificate authorities

and service account keys on each node and then running the following as root:

  kubeadm join 192.168.1.88:16443 --token 9037x2.tcaqnpaqkra9vsbw \

    --discovery-token-ca-cert-hash sha256:b1e726042cdd5df3ce62e60a2f86168cd2e64bff856e061e465df10cd36295b8 \

    --control-plane

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

kubeadm join 192.168.1.88:16443 --token 9037x2.tcaqnpaqkra9vsbw \

    --discovery-token-ca-cert-hash sha256:b1e726042cdd5df3ce62e60a2f86168cd2e64bff856e061e465df10cd36295b8

初始化完成后,会有两个join的命令,带有 --control-plane 是用于加入组建多master集群的,不带的是加入节点的。

拷贝kubectl使用的连接k8s认证文件到默认路径:

mkdir -p $HOME/.kube

sudo cp -i /etc/kubernetes/admin.conf $HOME/.kube/config

sudo chown $(id -u):$(id -g) $HOME/.kube/config

kubectl get node

NAME          STATUS     ROLES                  AGE     VERSION

k8s-master1   NotReady   control-plane,master   6m42s   v1.20.4

5.2 初始化Master2、Master3

将Master1节点生成的证书拷贝到Master2、Master3:

 scp -r /etc/kubernetes/pki/ 192.168.1.2:/etc/kubernetes/

 scp -r /etc/kubernetes/pki/ 192.168.1.3:/etc/kubernetes/

复制加入master join命令在master2、master3执行:

  kubeadm join 192.168.1.88:16443 --token 9037x2.tcaqnpaqkra9vsbw \

    --discovery-token-ca-cert-hash sha256:b1e726042cdd5df3ce62e60a2f86168cd2e64bff856e061e465df10cd36295b8 \

    --control-plane

拷贝kubectl使用的连接k8s认证文件到默认路径:

mkdir -p $HOME/.kube

sudo cp -i /etc/kubernetes/admin.conf $HOME/.kube/config

sudo chown $(id -u):$(id -g) $HOME/.kube/config

kubectl get node

NAME          STATUS     ROLES                  AGE     VERSION

k8s-master1   NotReady   control-plane,master   28m     v1.20.4

k8s-master2   NotReady   control-plane,master   2m12s   v1.20.4

k8s-master3   NotReady   control-plane,master   2m10s   v1.20.4

注:由于网络插件还没有部署,还没有准备就绪 NotReady

5.3 访问负载均衡器测试

找K8s集群中任意一个节点,使用curl查看K8s版本测试,使用VIP访问:

curl -k https://192.168.1.88:16443/version

{

  "major": "1",

  "minor": "20",

  "gitVersion": "v1.20.4",

  "gitCommit": "e87da0bd6e03ec3fea7933c4b5263d151aafd07c",

  "gitTreeState": "clean",

  "buildDate": "2021-04-18T16:03:00Z",

  "goVersion": "go1.15.8",

  "compiler": "gc",

  "platform": "linux/amd64"}

可以正确获取到K8s版本信息,说明负载均衡器搭建正常。该请求数据流程:curl -> vip(nginx) -> apiserver

通过查看Nginx日志也可以看到转发apiserver IP:

tail /var/log/nginx/k8s-access.log -f

192.168.1.1 192.168.1.1:6443 - [04/Apr/2021:19:17:57 +0800] 200 423

六、加入Kubernetes Node

在192.168.1.4(Node)执行。

向集群添加新节点,执行在kubeadm init输出的kubeadm join命令:

kubeadm join 192.168.1.88:16443 --token 9037x2.tcaqnpaqkra9vsbw \

    --discovery-token-ca-cert-hash sha256:e6a724bb7ef8bb363762fbaa088f6eb5975e0c654db038560199a7063735a697

后续其他节点也是这样加入。

注:默认token有效期为24小时,当过期之后,该token就不可用了。这时就需要重新创建token,可以直接使用命令快捷生成:kubeadm token create --print-join-command

七、部署网络组件

Calico是一个纯三层的数据中心网络方案,是目前Kubernetes主流的网络方案。

部署Calico:

链接:https://pan.baidu.com/s/1cRF0XRwOhaNfBe3OVKT79Q

提取码:otm5

kubectl apply -f calico.yaml kubectl get pods -n kube-system

等Calico Pod都Running,节点也会准备就绪:

kubectl get node

NAME          STATUS   ROLES                  AGE   VERSION

k8s-master1    Ready    control-plane,master   50m   v1.20.4

k8s-master2    Ready    control-plane,master   24m   v1.20.4

k8s-master3    Ready    control-plane,master   24m   v1.20.4

k8s-node1     Ready    <none>            20m   v1.20.4

八、部署 Dashboard

Dashboard是官方提供的一个UI,可用于基本管理K8s资源。

链接:https://pan.baidu.com/s/1_6v6BuEkpN-DPoyvQjF_nA

提取码:2zh0

kubectl apply -f kubernetes-dashboard.yaml

# 查看部署

kubectl get pods -n kubernetes-dashboard

访问地址:https://NodeIP:30001

创建service account并绑定默认cluster-admin管理员集群角色:

kubectl create serviceaccount dashboard-admin -n kube-system

kubectl create clusterrolebinding dashboard-admin --clusterrole=cluster-admin --serviceaccount=kube-system:dashboard-admin

kubectl describe secrets -n kube-system $(kubectl -n kube-system get secret | awk '/dashboard-admin/{print $1}')

使用输出的token登录Dashboard。

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