【K8s】专题四：Kubernetes 安装方法之 Sealos

# AMD架构
wget https://github.com/labring/sealos/releases/download/v4.3.7/sealos_4.3.7_linux_amd64.tar.gz
tar -xzf sealos_4.3.7_linux_amd64.tar.gz -C /usr/bin
chmod +x /usr/bin/sealos

# ARM架构
wget https://github.com/labring/sealos/releases/download/v4.3.7/sealos_4.3.7_linux_arm64.tar.gz
tar -xzf sealos_4.3.7_linux_arm64.tar.gz -C /usr/bin
chmod +x /usr/bin/sealos

# 查看版本信息
sealos version

# 关闭防火墙
systemctl disable --now firewalld

# 关闭 selinxu
setenforce 0
sed -i ’s/SELINUX=enforcing/SELINUX=disabled/g’ /etc/selinux/config

# 清空 iptables 规则
iptables -F && iptables -t nat -F

# 禁用 swap 分区
swapoff -a
sed -i '/swap / s/^\(.*\)$/#\1/g' /etc/fstab

# /etc/hosts 文件添加条目（需要保证主机的 hostname 唯一）
172.16.200.166  master
172.16.200.167  node

# 配置主机间 SSH 免密（详细过程略）

sealos run labring/kubernetes:v1.26.0 labring/calico:v3.24.1 --masters 172.16.200.166 --nodes 172.16.200.167
 
🔔 提示一
# labring/kubernetes:v1.26.0：指定集群镜像名称，可以通过 https://explore.ggcr.dev 查询
# labring/calico:v3.24.1：指定 Calico 镜像名称
# --masters：指定集群 Master 节点的 IP 地址，多个 IP 通过 ，进行分隔
# --nodes：指定集群 Node 节点的 IP 地址，多个 IP 通过 ，进行分隔
 
🔔 提示二
# Nginx-Ingress-Controller 等组件需要自行安装

sealos apply -f Clusterfile.yaml
 
🔔 提示
可以通过 clusterfile.yaml 自定义部署配置，如 kubeadm 配置、Docker 配置等

🔔 定义集群信息
---
apiVersion: apps.sealos.io/v1beta1
kind: Cluster
metadata:
  name: mycluster
spec:
  image:
    - labring/kubernetes:v1.26.0
    - labring/calico:v3.24.1
  ssh:
    user: root
    pk: /root/.ssh/id_rsa
    passwd: xxxx
    port: 22
  hosts:
    - ips:
        - 172.16.200.166:22
      roles:
        - master
        - amd64
    - ips:
        - 172.16.200.167:22
      roles:
        - node
        - amd64
 
🔔 定义 Calico 配置
---
apiVersion: apps.sealos.io/v1beta1
kind: Config
metadata:
  name: calico
spec:
  path: charts/calico/values.yaml
  strategy: merge
  data: |
    installation:
      enabled: true
      kubernetesProvider: ""
      calicoNetwork:
        ipPools:
        - blockSize: 26
          cidr: 10.160.0.0/12
          encapsulation: IPIP
          natOutgoing: Enabled
          nodeSelector: all()
        nodeAddressAutodetectionV4:
          interface: "eth.*|en.*"

sealos --help
 
sealos is a Kubernetes distribution, a unified OS to manage cloud native applications.
 
Cluster Management Commands:
  apply         Run cloud images within a kubernetes cluster with Clusterfile
  cert          update Kubernetes API server's cert
  run           Run cloud native applications with ease, with or without a existing cluster
  reset         Reset all, everything in the cluster
  status        state of sealos
Node Management Commands:
  add           Add nodes into cluster
  delete        Remove nodes from cluster
Remote Operation Commands:
  exec          Execute shell command or script on specified nodes
  scp           Copy file to remote on specified nodes
Experimental Commands:
  registry      registry related
Container and Image Commands:
  build         Build an image using instructions in a Containerfile or Kubefile
  create        Create a cluster without running the CMD, for inspecting image
  diff          Inspect changes to the object's file systems
  inspect       Inspect the configuration of a container or image
  images        List images in local storage
  load          Load image(s) from archive file
  login         Login to a container registry
  logout        Logout of a container registry
  manifest      Manipulate manifest lists and image indexes
  merge         merge multiple images into one
  pull          Pull images from the specified location
  push          Push an image to a specified destination
  rmi           Remove one or more images from local storage
  save          Save image into archive file
  tag           Add an additional name to a local image
 
Other Commands:
  completion    Generate the autocompletion script for the specified shell
  docs          generate API reference
  env           prints out all the environment information in use by sealos
  gen           generate a Clusterfile with all default settings
  version       Print version info
 
Use "sealos <command> --help" for more information about a given command.

# 查看集群镜像
sealos images
 
# 添加 Master 节点
sealos add --masters 172.16.200.168
 
# 删除 Master 节点
sealos delete --masters 172.16.200.168
 
# 添加 Node 节点
sealos add --nodes 172.16.200.168
 
# 删除 Node 节点
sealos delete --nodes 172.16.200.168
 
# 在集群节点上批量执行 shell 命令
sealos exec "cat /etc/hosts"
 
# 查看集群统计信息
sealos status
 
# 删除集群
sealos reset --force

FROM labring/kubernetes:v1.26.0
 
COPY daemon.json etc/

sealos build -t labring/kubernetes:v1.26.0-fix -f kubefile .