K3S系列文章-使用AutoK3s在腾讯云上安装高可用K3S集群

标签：K3S k3s level -- AutoK3s tencent msg 云上 autok3s

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《K3s 系列文章》
《Rancher 系列文章》

方案

在腾讯云上安装 K3S

后续会在这套 K3S 集群上安装 Rancher

方案目标

高可用
1. 3 台master 的 k3s 集群
数据备份
1. k3s 数据备份到腾讯云对象存储 cos
尽量复用公有云的能力
1. ~~Tencent Cloud Controller Manager~~ (❌ 因为腾讯云已经放弃维护相关源码, 所以无法复用)
2. ~~SVC LoadBalancer 调用 CLB~~ (❌ 因为腾讯云已经放弃维护相关源码, 所以无法复用)
3. 备份 - 使用腾讯云 COS

前提条件

有腾讯云账户，账户至少拥有如下权限：auto k3s 安装 - 设置 CAM 以及这些权限:
1. QcloudTAGFullAccess
该腾讯云账号有对应的 API 密钥，地址：访问密钥 - 控制台 (tencent.com) ，或者拥有相关权限：cam:QueryCollApiKey 和 cam:CreateCollApiKey
一台 linux 操作机，用于部署 autok3s
一个对象存储通 cos，用于备份
已有的镜像仓库的一些账号密码或认证信息，包括：quay，docker，腾讯云（用于加速 pull push镜像）

ℹ️ Info:

腾讯云 tcr 广州提供免费个人版实例，可以使用并添加：

https://ccr.ccs.tencentyun.com

K3S 安装注意事项

通过autok3s部署
通过 autok3s 安装后, 默认 k8s api 通过公网 IP 进行通信, 需要调整 systemd 配置使其通过内网进行通信.
⚠️付费模式，安装后可根据具体情况在将付费模式控制台改为：包年包月

K3S 安装参数

本次 K3s 安装参数如下：

Master 3台
Worker: 0
Region：shanghai （ap-shanghai）
zone：二区（ap-shanghai-2）
Instance Type：S5.MEDIUM8
Image: img-22trbn9x (ubuntu 20.04)
instanceChargeType：默认后付费，且无法调整。⚠️安装后控制台改为：PREPAID
Disk: CLOUD_SSD (ℹ️ CLOUD_PREMIUM(高性能云盘), CLOUD_SSD(SSD云硬盘))
Disk Size: 50 G
VPC ID: 空（autok3s 会自动创建）
Subnet ID: 空（autok3s 会自动创建）
Internet Max Bandwidth Out：5 (可以按需调小)
Security Group Ids：空, 让 autok3s 自动创建, 集群创建好之后再调整安全组, 缩小入口范围
EIP：是否使用弹性公网IP false
Tags (见下文)
K3s Version: v1.21.7+k3s1
Cluster: true
Master Extra Args: 见下文
Cluster模式: true
Registry(见下文)
UI：true

⚠️ Warning:

执行 autok3s 创建前, 如果选择已有的安全组, 那么 CVM 实例至少需要应用以下安全组规则:
Rule        Protocol    Port      Source             Description
InBound     TCP         22        ALL                SSH Connect Port
InBound     TCP         6443      K3s agent nodes    Kubernetes API
InBound     TCP         10250     K3s server & agent Kubelet
InBound     UDP         8472      K3s server & agent (Optional) Required only for Flannel VXLAN
InBound     TCP         2379,2380 K3s server nodes   (Optional) Required only for embedded ETCD
OutBound    ALL         ALL       ALL                Allow All
特别是: 22 端口必须要对操作机的公网IP 开放

原因: autok3s 自动部署公有云时, 通过公网IP 上传 KeyPair, 如果没有以上安全组, autok3s 会执行失败. 报错如下: (101.34.46.218 就是公网 IP)
level=error msg="[ssh-dialer] init dialer [101.34.46.218:22] error: [tencent] calling getInstanceStatus error. region: ap-shanghai, zone: ap-shanghai-2, instanceName: [ins-ggxozpyl ins-cfi2vio1 ins-78rkem0b], message: not `RUNNING` status"

安装步骤

AutoK3s

在操作机上安装，命令如下：

curl -sS http://rancher-mirror.cnrancher.com/autok3s/install.sh  | INSTALL_AUTOK3S_MIRROR=cn sh

过程如下：

Downloading package http://rancher-mirror.rancher.cn/autok3s/v0.4.6/autok3s_linux_amd64 as /tmp/autok3s_linux_amd64
Download complete.

Running with sufficient permissions to attempt to move autok3s to /usr/local/bin
New version of autok3s installed to /usr/local/bin
Version: {"gitVersion":"v0.4.6","gitCommit":"4537e6ee2aea8b204a72f7b6c377edb154f7c058","gitTreeState":"","buildDate":"2021-12-28T04:15:30Z","goVersion":"go1.16.2","compiler":"gc","platform":"linux/amd64"}
Downloading package http://rancher-mirror.rancher.cn/kube-explorer/v0.2.7/kube-explorer-linux-amd64 as /tmp/kube-explorer-linux-amd64
Download complete.

Running with sufficient permissions to attempt to move kube-explorer to /usr/local/bin
New version of kube-explorer installed to /usr/local/bin
Skipping /usr/local/bin/kubectl symlink to autok3s, already exists

您可以通过以下 CLI 命令启动本地 UI。

autok3s serve --bind-address 0.0.0.0 --bind-port 8087

⚠️ Warning:

页面无登录认证，确保最小权限开放以及用完后及时关闭。

输出如下：

INFO[0000] run as daemon, listening on 127.0.0.1:8087

访问 UI：http://<操作机IP>:8087

AutoK3s UI 模板

如果今后要多次安装，可以在 UI 上创建可复用的模板，模板包括如下固定参数：

Credential Options：
1. 腾讯云 Secret Id
2. 腾讯云 Secret Key
Instance Options
1. Basic
  1. Region：ap-shanghai
  2. Zone：ap-shanghai-2
  3. Instance Type: S5.MEDIUM8
  4. Image: img-22trbn9x (ubuntu 20.04)
  5. Disk Category: CLOUD_SSD
  6. Disk Size: 50 G
2. Network
  1. Internet Max Bandwidth Out：5
  2. EIP: Disable
  3. ⚠️ 注意：另外 3 个参数：VPC ID、SubnetID、Security Group Ids 每次创建时需要按需填写或留空
3. SSH Public
  1. SSH User：ubuntu
  2. SSH Port：22
  3. Keypair Id : 留空(⚠️ 注意：如果 Keypair Id 留空，会自动生成 Keypair)
4. SSH Private
  1. SSH Agent Auth：Disable
  2. SSH Key Path: 留空(⚠️ 注意：如果上面选择了 Keypair Id, 那么对应的SSH Key Path 也要填写)
5. Advance
  1. 打了 3 个 tags，方便后续管理：
    1. app=rancher
    2. env=prod
    3. provider=k3s
K3s Options
1. Basic
  1. K3s Channel: stable
  2. K3s Version: v1.21.7+k3s1 (ℹ️ Info: 202201 根据 suse 官网选型的最新稳定版，k3s v1.21.7+k3s1，后面会按需调整版本)
  3. Cluster： Enable(启用集群模式，使用 etcd 组成高可用集群)
  4. K3s Install Script：http://rancher-mirror.cnrancher.com/k3s/k3s-install.sh
2. Master
  1. Master: 3
  2. Master Extra Args：
```
--write-kubeconfig-mode "644" --pause-image registry.cn-hangzhou.aliyuncs.com/rancher/pause:3.6 --etcd-s3 --etcd-snapshot-schedule-cron 0 0 * * * --etcd-s3-endpoint cos.ap-shanghai.myqcloud.com --etcd-s3-access-key <your-cos-access-key> --etcd-s3-secret-key  <your-cos-secret-key> --etcd-s3-bucket  <your-cos-bucket> --etcd-s3-folder /rancher/k3s
```
3. Worker
  1. Worker: 0
4. Advance: 留空
5. TLS Sans: 留空 (⚠️ 如果前面会使用 CLB 作为负载均衡，那么建议填上 CLB VIP)
6. Registry, 见下面registries.yaml
Additional Options
1. UI: explorer

registries.yaml:

mirrors:
  docker.io:
    endpoint:
      - "https://mirror.ccs.tencentyun.com"
      - "https://registry.cn-hangzhou.aliyuncs.com"
      - "https://docker.mirrors.ustc.edu.cn"
  quay.io:
    endpoint:
      - "https://mirror.ccs.tencentyun.com"    
configs:
  'ccr.ccs.tencentyun.com':
    auth:
      username: <your-account-id>
      password: <your-registry-password>

AutoK3s 通过 UI 创建 K3S 集群

访问 UI 界面, 点击 Quick Start, Provider 选择 tencent;

然后在下方填入自定义的信息, 主要是填写 Network 的信息, 如下图:

点击 Create, 等待返回结果即可.

AutoK3s CLI 命令

您也可以通过以下 CLI 在腾讯云上快速创建一个 3 master, 0 worker 节点的 K3s 高可用集群。

autok3s create --provider tencent --cluster --enable [ "explorer" ] --k3s-channel stable --k3s-install-mirror INSTALL_K3S_MIRROR=cn --k3s-install-script http://rancher-mirror.cnrancher.com/k3s/k3s-install.sh --k3s-version v1.21.7+k3s1 --master 3 --master-extra-args '--write-kubeconfig-mode "644" --pause-image registry.cn-hangzhou.aliyuncs.com/rancher/pause:3.6 --etcd-s3 --etcd-snapshot-schedule-cron 0 0 * * * --etcd-s3-endpoint cos.ap-shanghai.myqcloud.com --etcd-s3-access-key <your-cos-access-key> --etcd-s3-secret-key <your-cos-secret-key> --etcd-s3-bucket <your-cos-bucket> --etcd-s3-folder /rancher/k3s' --name rancher-1 --ssh-port 22 --ssh-user ubuntu --tls-sans <your-clb-ip> --worker 0 --disk-category CLOUD_SSD --disk-size 50 --image img-22trbn9x --instance-type S5.MEDIUM8 --internet-max-bandwidth-out 5 --keypair-id <your-keypair-id> --region ap-shanghai --secret-id <your-tencent-secret-id> --secret-key <your-tencent-secret-key> --tags 'app=rancher' --tags 'env=prod' --tags 'provider=k3s' --zone ap-shanghai-2 --vpc <your-vpc-id> --subnet <your-subnet-id> --registry /etc/autok3s/registries.yaml

安装成功日志显示如下:

time="2022-02-12T14:52:16+08:00" level=info msg="[tencent] executing create logic..."
INFO[0000] [tencent] use existing key pair 
time="2022-02-12T14:52:16+08:00" level=info msg="[tencent] 3 masters and 0 workers will be added"
time="2022-02-12T14:52:16+08:00" level=info msg="[tencent] check default security group autok3s in region ap-shanghai"
time="2022-02-12T14:52:16+08:00" level=info msg="[tencent] create default security group autok3s in region ap-shanghai"
time="2022-02-12T14:52:16+08:00" level=info msg="[tencent] check rules of security group autok3s"
time="2022-02-12T14:52:18+08:00" level=info msg="[tencent] 3 number of master instances will be created"
time="2022-02-12T14:52:23+08:00" level=info msg="[tencent] 3 number of master instances successfully created"
time="2022-02-12T14:52:23+08:00" level=info msg="[tencent] waiting for the instances [ins-xxxxx] to be in `RUNNING` status..."
time="2022-02-12T14:52:54+08:00" level=info msg="[tencent] instances [ins-xxxxx] are in `RUNNING` status"
time="2022-02-12T14:52:54+08:00" level=info msg="[tencent] executing init k3s cluster logic..."
time="2022-02-12T14:52:54+08:00" level=info msg="[tencent] creating k3s master-1..."
mirrors:
    docker.io:
        endpoint:
            - https://mirror.ccs.tencentyun.com
            - https://registry.cn-hangzhou.aliyuncs.com
            - https://docker.mirrors.ustc.edu.cn
    quay.io:
        endpoint:
            - https://mirror.ccs.tencentyun.com
configs:
    ccr.ccs.tencentyun.com:
        auth:
            username: 
            password: 
            auth: ""
            identity_token: ""
        tls: null
auths: {}
time="2022-02-12T14:53:26+08:00" level=info msg="[cluster] k3s master command: curl -sLS http://rancher-mirror.cnrancher.com/k3s/k3s-install.sh | INSTALL_K3S_MIRROR=cn K3S_TOKEN='xxxxxxx' INSTALL_K3S_EXEC='server  --tls-san xxxxx --tls-san xxxxxxxx --tls-san xxxxxxx --node-external-ip xxxxxx --write-kubeconfig-mode \"644\" --pause-image registry.cn-hangzhou.aliyuncs.com/rancher/pause:3.6 --disable-cloud-controller --cluster-cidr 10.42.0.0/16 --cluster-init' INSTALL_K3S_VERSION='v1.21.7+k3s1' sh -"
[INFO]  Using v1.21.7+k3s1 as release
[INFO]  Downloading hash http://rancher-mirror.cnrancher.com/k3s/v1.21.7-k3s1/sha256sum-amd64.txt
[INFO]  Downloading binary http://rancher-mirror.cnrancher.com/k3s/v1.21.7-k3s1/k3s
[INFO]  Verifying binary download
[INFO]  Installing k3s to /usr/local/bin/k3s
[INFO]  Creating /usr/local/bin/kubectl symlink to k3s
[INFO]  Creating /usr/local/bin/crictl symlink to k3s
[INFO]  Creating /usr/local/bin/ctr symlink to k3s
[INFO]  Creating killall script /usr/local/bin/k3s-killall.sh
[INFO]  Creating uninstall script /usr/local/bin/k3s-uninstall.sh
[INFO]  env: Creating environment file /etc/systemd/system/k3s.service.env
[INFO]  systemd: Creating service file /etc/systemd/system/k3s.service
[INFO]  systemd: Enabling k3s unit
[INFO]  systemd: Starting k3s
time="2022-02-12T14:53:59+08:00" level=info msg="[tencent] successfully created k3s master-1"
time="2022-02-12T14:53:59+08:00" level=info msg="[tencent] creating k3s master-2..."
...
time="2022-02-12T14:54:35+08:00" level=info msg="[tencent] successfully created k3s master-2"
time="2022-02-12T14:54:35+08:00" level=info msg="[tencent] creating k3s master-3..."
...
time="2022-02-12T14:55:06+08:00" level=info msg="[tencent] successfully created k3s master-3"
apiVersion: v1
clusters:
- cluster:
    certificate-authority-data: ......
    server: https://127.0.0.1:6443
  name: default
contexts:
- context:
    cluster: default
    user: default
  name: default
current-context: default
kind: Config
preferences: {}
users:
- name: default
  user:
    client-certificate-data: ......
    client-key-data: ......
time="2022-02-12T14:55:06+08:00" level=info msg="[tencent] deploying additional manifests"
time="2022-02-12T14:55:06+08:00" level=info msg="[tencent] successfully deployed additional manifests"
time="2022-02-12T14:55:06+08:00" level=info msg="[tencent] successfully executed init k3s cluster logic"
---
time="2022-02-12T14:55:07+08:00" level=info msg="[tencent] successfully deployed manifests"
time="2022-02-12T14:55:07+08:00" level=info msg="=========================== Prompt Info ==========================="
time="2022-02-12T14:55:07+08:00" level=info msg="Use 'autok3s kubectl config use-context prod-ha.ap-shanghai.tencent'"
time="2022-02-12T14:55:07+08:00" level=info msg="Use 'autok3s kubectl get pods -A' get POD status`"

标签：K3S,k3s,level,--,AutoK3s,tencent,msg,云上,autok3s
From： https://www.cnblogs.com/east4ming/p/17154914.html