All Projects → fanux → Sealos

fanux / Sealos

Licence: apache-2.0
一条命令离线安装高可用kubernetes,3min装完,700M,100年证书,版本不要太全,生产环境稳如老狗

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⚠️ 风险须知

由于sealos可以把一周的工作量缩短到三分钟,可能会导致您工作不饱满而被老板炒鱿鱼

trackgit-views

一条命令部署 Kubernetes 高可用集群 👋

只能用丝滑一词形容的kubernetes高可用安装(kubernetes install)工具,一条命令,离线安装,包含所有依赖,内核负载不依赖haproxy keepalived,纯golang开发,99年证书,支持v1.20.0 v1.19.5 v1.18.13 v1.17.15!

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文档: 官方文档, 博客

加入组织: 钉钉群(35371178), Telegram

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支持的环境

Linux 发行版, CPU架构

  • Debian 9+, x86_64/ arm64
  • Ubuntu 16.04, 18.04, 20.04, x86_64/ arm64
  • Centos/RHEL 7.6+, x86_64/ arm64
  • 其他支持 systemd 的系统环境. x86_64/ arm64
  • Kylin arm64

kubernetes 版本

  • 1.16+
  • 1.17+
  • 1.18+
  • 1.19+
  • 1.20+
  • 1.21+
  • 1.22+

更多版本支持, 详细查看sealyun.com

要求和建议

  • 最低资源要求

    • 2 vCpu
    • 4G Ram
    • 40G+ 存储
  • 操作系统要求

    • ssh 可以访问各安装节点
    • 各节点主机名不相同,并满足kubernetes的主机名要求。
    • 各节点时间同步
    • 网卡名称如果是不常见的,建议修改成规范的网卡名称, 如(eth.|en.|em.*)
    • kubernetes1.20+ 使用containerd作为cri. 不需要用户安装docker/containerd. sealos会安装1.3.9版本containerd。
    • kubernetes1.19及以下 使用docker作为cri。 也不需要用户安装docker。 sealos会安装1.19.03版本docker
  • 网络和 DNS 要求:

    • 确保 /etc/resolv.conf 中的 DNS 地址可用。否则,可能会导致群集中coredns异常。
    • 如果使用阿里云/华为云主机部署。 默认的pod网段会和阿里云的dns网段冲突, 建议自定义修改pod网段, 在init的时候指定--podcidr 来修改。
    • sealos 默认会关闭防火墙, 如果需要打开防火墙, 建议手动放行相关的端口。
  • 内核要求:

    • cni组件选择cilium时要求内核版本不低于5.4

🚀 快速开始

环境信息

主机名 IP地址
master0 192.168.0.2
master1 192.168.0.3
master2 192.168.0.4
node0 192.168.0.5

服务器密码:123456

kubernetes .0版本不建议上生产环境!!!

只需要准备好服务器,在任意一台服务器上执行下面命令即可

# 下载并安装sealos, sealos是个golang的二进制工具,直接下载拷贝到bin目录即可, release页面也可下载
$ wget -c https://sealyun.oss-cn-beijing.aliyuncs.com/latest/sealos && \
    chmod +x sealos && mv sealos /usr/bin 

# 下载离线资源包
$ wget -c https://sealyun.oss-cn-beijing.aliyuncs.com/05a3db657821277f5f3b92d834bbaf98-v1.22.0/kube1.22.0.tar.gz

# 安装一个三master的kubernetes集群
$ sealos init --passwd '123456' \
	--master 192.168.0.2  --master 192.168.0.3  --master 192.168.0.4  \
	--node 192.168.0.5 \
	--pkg-url /root/kube1.22.0.tar.gz \
	--version v1.22.0

参数含义

参数名 含义 示例
passwd 服务器密码 123456
master k8s master节点IP地址 192.168.0.2
node k8s node节点IP地址 192.168.0.3
pkg-url 离线资源包地址,支持下载到本地,或者一个远程地址 /root/kube1.22.0.tar.gz
version 资源包对应的版本 v1.22.0

增加master

🐳 → sealos join --master 192.168.0.6 --master 192.168.0.7
🐳 → sealos join --master 192.168.0.6-192.168.0.9  # 或者多个连续IP

增加node

🐳 → sealos join --node 192.168.0.6 --node 192.168.0.7
🐳 → sealos join --node 192.168.0.6-192.168.0.9  # 或者多个连续IP

删除指定master节点

🐳 → sealos clean --master 192.168.0.6 --master 192.168.0.7
🐳 → sealos clean --master 192.168.0.6-192.168.0.9  # 或者多个连续IP

删除指定node节点

🐳 → sealos clean --node 192.168.0.6 --node 192.168.0.7
🐳 → sealos clean --node 192.168.0.6-192.168.0.9  # 或者多个连续IP

清理集群

🐳 → sealos clean --all

特性

  • 支持ARM版本离线包,v1.20版本离线包支持containerd集成,完全抛弃docker
  • 99年证书, 支持集群备份,升级
  • 不依赖ansible haproxy keepalived, 一个二进制工具,0依赖
  • 离线安装,不同kubernetes版本下载对应不同版本的资源包即可,离线包包含所有二进制文件配置文件和镜像
  • 高可用通过ipvs实现的localLB,占用资源少,稳定可靠,类似kube-proxy的实现
  • 几乎可兼容所有支持systemd的x86_64架构的环境
  • 轻松实现集群节点的增加/删除
  • 上千用户在线上环境使用sealos,稳定可靠
  • 资源包放在阿里云oss上,再也不用担心网速
  • dashboard ingress prometheus等APP 同样离线打包,一键安装

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