开篇
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
- 数据备份
- 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
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
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
- 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
- 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
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
- 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
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>
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
- 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`"
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