K3S系列文章-使用AutoK3s在腾讯云上安装高可用K3S集群
开篇[*]《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
[*]3 台master 的 k3s 集群
[*]数据备份
[*]k3s 数据备份到 腾讯云对象存储 cos
[*]尽量复用公有云的能力
[*]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)
[*]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)
[*]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:
[*]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=" init dialer error: calling getInstanceStatus error. region: ap-shanghai, zone: ap-shanghai-2, instanceName: , 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 run as daemon, listening on 127.0.0.1:8087访问 UI：http://: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：
[*]腾讯云 Secret Id
[*]腾讯云 Secret Key
[*]Instance Options
[*]Basic
[*]Region：ap-shanghai
[*]Zone：ap-shanghai-2
[*]Instance Type: S5.MEDIUM8
[*]Image: img-22trbn9x (ubuntu 20.04)
[*]Disk Category: CLOUD_SSD
[*]Disk Size: 50 G
[*]Network
[*]Internet Max Bandwidth Out：5
[*]EIP: Disable
[*]⚠️ 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
[*]SSH Public
[*]SSH User：ubuntu
[*]SSH Port：22
[*]Keypair Id : 留空(⚠️ 注意：如果 Keypair Id 留空，会自动生成 Keypair)
[*]SSH Private
[*]SSH Agent Auth：Disable
[*]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)
[*]Advance
[*]打了 3 个 tags，方便后续管理：
[*]app=rancher
[*]env=prod
[*]provider=k3s
[*]K3s Options
[*]Basic
[*]K3s Channel: stable
[*]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)
[*]Cluster： Enable(启用集群模式，使用 etcd 组成高可用集群)
[*]K3s Install Script：http://rancher-mirror.cnrancher.com/k3s/k3s-install.sh
[*]Master
[*]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
[*]Worker
[*]Worker: 0
[*]Advance: 留空
[*]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)
[*]Registry, 见下面registries.yaml
[*]Additional Options
[*]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:
https://img2023.cnblogs.com/other/3034537/202302/3034537-20230225174943483-1203545847.png
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=" executing create logic..."
INFO use existing key pair
time="2022-02-12T14:52:16+08:00" level=info msg=" 3 masters and 0 workers will be added"
time="2022-02-12T14:52:16+08:00" level=info msg=" check default security group autok3s in region ap-shanghai"
time="2022-02-12T14:52:16+08:00" level=info msg=" create default security group autok3s in region ap-shanghai"
time="2022-02-12T14:52:16+08:00" level=info msg=" check rules of security group autok3s"
time="2022-02-12T14:52:18+08:00" level=info msg=" 3 number of master instances will be created"
time="2022-02-12T14:52:23+08:00" level=info msg=" 3 number of master instances successfully created"
time="2022-02-12T14:52:23+08:00" level=info msg=" waiting for the instances to be in `RUNNING` status..."
time="2022-02-12T14:52:54+08:00" level=info msg=" instances are in `RUNNING` status"
time="2022-02-12T14:52:54+08:00" level=info msg=" executing init k3s cluster logic..."
time="2022-02-12T14:52:54+08:00" level=info msg=" 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=" 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 -"
Using v1.21.7+k3s1 as release
Downloading hash http://rancher-mirror.cnrancher.com/k3s/v1.21.7-k3s1/sha256sum-amd64.txt
Downloading binary http://rancher-mirror.cnrancher.com/k3s/v1.21.7-k3s1/k3s
Verifying binary download
Installing k3s to /usr/local/bin/k3s
Creating /usr/local/bin/kubectl symlink to k3s
Creating /usr/local/bin/crictl symlink to k3s
Creating /usr/local/bin/ctr symlink to k3s
Creating killall script /usr/local/bin/k3s-killall.sh
Creating uninstall script /usr/local/bin/k3s-uninstall.sh
env: Creating environment file /etc/systemd/system/k3s.service.env
systemd: Creating service file /etc/systemd/system/k3s.service
systemd: Enabling k3s unit
systemd: Starting k3s
time="2022-02-12T14:53:59+08:00" level=info msg=" successfully created k3s master-1"
time="2022-02-12T14:53:59+08:00" level=info msg=" creating k3s master-2..."
...
time="2022-02-12T14:54:35+08:00" level=info msg=" successfully created k3s master-2"
time="2022-02-12T14:54:35+08:00" level=info msg=" creating k3s master-3..."
...
time="2022-02-12T14:55:06+08:00" level=info msg=" 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=" deploying additional manifests"
time="2022-02-12T14:55:06+08:00" level=info msg=" successfully deployed additional manifests"
time="2022-02-12T14:55:06+08:00" level=info msg=" successfully executed init k3s cluster logic"
---
time="2022-02-12T14:55:07+08:00" level=info msg=" 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`"
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