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[![Awesome](https://cdn.rawgit.com/sindresorhus/awesome/d7305f38d29fed78fa85652e3a63e154dd8e8829/media/badge.svg)](https://github.com/fanux/sealos)
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[![Awesome](https://cdn.rawgit.com/sindresorhus/awesome/d7305f38d29fed78fa85652e3a63e154dd8e8829/media/badge.svg)](https://github.com/fanux/sealos)
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---
Documentation: https://www.sealyun.com/instructions, Blog: https://fuckcloudnative.io
Organization: _DingTalk(35371178), [Telegram](https://t.me/cloudnativer)
---
# Introduction
Build a production kubernetes HA cluster.
Build a kubernetes HA cluster for a production environment.
[简体中文](README.md)
![](docs/images/arch.png)
* Every node config a ipvs proxy for masters LB, so we needn't haproxy or keepalived any more.
* Each node will be configured with an ipvs proxy for masters LB, so we needn't haproxy or keepalived any more.
* Then run a [lvscare](https://github.com/fanux/lvscare) as a staic pod to check apiserver is aviliable. `/etc/kubernetes/manifests/sealyun-lvscare.yaml`
* If any master is down, lvscare will remove the ipvs realserver, when master recover it will add it back.
* Sealos will send package and apply install commands, so we needn't ansible.
@@ -43,16 +52,18 @@ sealos is currently supported the latest k8s 1.22+
- OS requirements
- SSH can access to all nodes.
- hostname is unique, and satisfied kubernetes requirements.
- These nodes have unique host names that meet the hostname requirements for kubernetes.
- Time synchronization for all nodes.
- network Iface has a stranger name, change it to (eth.*|en.*|em.*)
- kubernetes1.20+, use containerd for default cri. user should not to install containerd or docker-ce. sealos will do it
- kubernetes1.19-, use docker for default cri. user should not to install docker-ce. sealos will do it for you
- Networking and DNS requirements：
- Make sure the DNS address in /etc/resolv.conf is available. Otherwise, it may cause some issues of DNS in cluster。
- if you use aliyun/huawei cloud to deploy kubernetes 。 default pod cidr is confilct with dns cidr， we recommand you install kubernetes init flag to add `--podcidr` to aviod this problem。
- sealos default to disable firewalld ，It's recommended that you turn off the firewall. if you want to use firewalld , remember to allow kubernetes port traffic。
- Network Iface name is unique, it is recommended to change it to a standard NIC name, such as (eth.|en.|em.*).
- Kubernetes1.20+, use containerd for default cri. user should not to install containerd or docker-ce. sealos will do it
- Kubernetes1.19-, use docker for default cri. user should not to install docker-ce. sealos will do it for you
- Networking and DNS requirements：
- Make sure the DNS address in /etc/resolv.conf is available. Otherwise, it may cause some issues of DNS in cluster。
- If you use Ali cloud or Huawei cloud host to deploy. The default pod segment will conflict with AliCloud's dns segment, it is recommended to customize the pod segment by specifying --podcidr during init.
- Sealos disables the firewall by default ，If you need to open the firewall, it is recommended to release the relevant ports manually.
- Kernel requirements:
- The cni component requires a kernel version of not less than 5.4 when selecting cilium
# Tips
- If you use Tencent Cloud Hosting to deploy, calico's IPIP rules are disabled by default, and you need to change to VXLAN rules to use it properly.
@@ -159,22 +170,19 @@ $ sealos init --passwd '123456' \
- [x] Support ARM version offline package, v1.20 version offline package supports containerd integration, completely abandon docker
- [x] 99 years certificate, support cluster backup and upgrade
- [x] Does not rely on ansible haproxy keepalived, a binary tool, 0 dependencies
- [x] No dependency on ansible haproxy keepalived, a binary tool, 0 dependency
- [x] Offline installation, different versions of kubernetes download corresponding to different versions [Resource pack](https://www.sealyun.com/goodsDetail?type=cloud_kernel&name=kubernetes), Offline package contains all binary files configuration files and images
- [x] High-availability local LIB implemented through ipvs, which takes up less resources, is stable and reliable, and is similar to the implementation of kube-proxy
- [x] Almost compatible with all environments that support systemd x86_64 architecture
- [x] Easily add and delete cluster nodes
- [x] Thousands of users use sealos in the online environment, which is stable and reliable
- [x] The resource pack is placed on Alibaba Cloud OSS, so you don’t have to worry about network speed anymore
- [x] dashboard ingress prometheus apps offline packaging, a key installation
# 📊 Stats
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[简体中文](README.md)
[More offline packages](https://sealyun.com)
[Telegram](https://t.me/cloudnativer)