seals部署kubernetes1.14.1

Posted 2022-09-05 冬眠的熊哎

注意事项

1.需要纯净的linux系统、ubunt16.04，centos7
2.新版本sealos离线包自带docker、如没安装docker，会自动安装
3.尽量使用新版本sealos
4.必须同步服务器时间，时间保持一致
5.master节点CPU必须2c以上
6.cni组件选择cilium时要求内核版本不低于5.4

网络参数：

pod的IP地址段，也称为cidr
#podcidr参数指定自定义pod网段 如
--podcidr 10.244.0.0/16

#svccidr参数指定clusterip网段 如
--svccidr 10.93.0.0/12

seals 架构

使用sealos部署k8s

1、环境准备

关闭firwalld（所有节点执行）

[root@VM-4-11-centos ~]# systemctl stop firewalld
[root@VM-4-11-centos ~]# systemctl disable firewalld

关闭selinux（所有节点执行）

[root@VM-4-11-centos ~]# setenforce 0
[root@VM-4-11-centos ~]# vim /etc/selinux/config
修改SELINUX=enforcing 为 SELINUX=disabled

配置所有主机名，主机名不允许重复

timedatectl set-timezone Asia/Shanghai  #都要执行
hostnamectl set-hostname master1   #master1执行
hostnamectl set-hostname node1    #node1执行

所有节点在 /etc/hosts 中添加解析

cat <<EOF >  /etc/hosts
127.0.0.1   localhost localhost.localdomain localhost4 localhost4.localdomain4
::1         localhost localhost.localdomain localhost6 localhost6.localdomain6
172.17.100.136 matser1
172.17.118.213 node1
EOF

2、配置时间同步

timedatectl set-timezone Asia/Shanghai
chronyc -a makestep

3、安装docker

cd /tmp
tar -zxf docker-18.06.3-ce.tgz -C /usr/local/bin
cd /usr/local/bin
mv docker dockerad
mv dockerad/* ./
rm -rf dockerad

vim /usr/lib/systemd/system/docker.service
[Unit]
Description=Docker Application Container Engine
Documentation=http://docs.docker.com

[Service]
Environment=PATH=/usr/local/bin:/usr/bin:/usr/sbin
EnvironmentFile=-/run/flannel/docker
ExecStart=/usr/local/bin/dockerd --graph=/data/docker --log-level=error $DOCKER_NETWORK_OPTIONS
ExecReload=/bin/kill -s HUP $MAINPID
Restart=on-failure
RestartSec=5
LimitNOFILE=infinity
LimitNPROC=infinity
LimitCORE=infinity
Delegate=yes
KillMode=process
ExecStartPost=/sbin/iptables -I FORWARD -s 0.0.0.0/0 -j ACCEPT
[Install]
WantedBy=multi-user.target

systemctl start docker
systemctl enable docker
systemctl status docker

4、下载安装sealos

wget -c https://github.com/fanux/sealos/releases/download/v3.3.8/sealos && chmod +x sealos && mv sealos /usr/bin/

5、下载k8s安装包

wget https://github.com/sealstore/cloud-kernel/releases/download/offline/kube1.14.1.tar.gz

6、部署单master多node集群（admin 是服务器的密码）

[root@master1 ~]# sealos init --passwd admin \\
> --master 172.17.100.x \\
> --node 172.17.100.x \\
> --pkg-url /root/kube1.14.1.tar.gz \\    #/root/kube1.14.1.tar.gz 是安装包的目录
> --version v1.14.1

7、配置多master节点多node集群

sealos init --passwd admin \\
    --master 192.168.200.x \\
    --master 192.168.200.x \\
    --master 192.168.200.x \\
    --node 192.168.200.x \\
    --pkg-url /root/kube1.14.1.tar.gz \\
    --version v1.14.1

8、查看node状态、pod状态

[root@master1 ~]# kubectl get node 
NAME      STATUS   ROLES    AGE   VERSION
master1   Ready    master   44m   v1.14.1
node1     Ready    <none>   43m   v1.14.1

[root@master1 ~]# kubectl get pod -n kube-system
NAME                                       READY   STATUS    RESTARTS   AGE
calico-kube-controllers-7cc5c56498-vgbks   1/1     Running   0          46m
calico-node-4qh22                          1/1     Running   0          27m
calico-node-zk9q7                          1/1     Running   0          46m
coredns-fb8b8dccf-lqpwf                    1/1     Running   0          46m
coredns-fb8b8dccf-vt7nj                    1/1     Running   0          46m
etcd-master1                               1/1     Running   0          45m
kube-apiserver-master1                     1/1     Running   0          45m
kube-controller-manager-master1            1/1     Running   0          45m
kube-proxy-6f8cp                           1/1     Running   0          46m
kube-proxy-6n4rh                           1/1     Running   0          46m
kube-scheduler-master1                     1/1     Running   0          45m
kube-sealyun-lvscare-node1                 1/1     Running   0          46m

9、验证

创建一个deployment和pod

[root@master1 ~]# kubectl create deployment my-tomcat --image=tomcat:7.0.75
deployment.apps/my-tomcat created

查看一下deployment和pod的信息

[root@master1 ~]# kubectl get deployment
NAME        READY   UP-TO-DATE   AVAILABLE   AGE
my-tomcat   1/1     1            1           30m

创建一个svc使应用在外部客户端访问

[root@master1 ~]# kubectl expose deployment my-tomcat --name=tomcat --port=8080 --type=NodePort
service/tomcat exposed

使用宿主机节点的IP加上暴露的端口进行访问

验证完成，部署完成