开发 k8s 管理平台 - k8sailor - 01. 使用 k3s 快速搭建项目环境
原文地址: https://tangx.in/posts/books/k8sailor/chapter01/01-install-k3s-cluster/
安装
k3s 安装过程参考
https://tangx.in/2021/06/07/k3s-architecture-single-server/
k3s 集群版本为 v1.21.4。 因此 k8s client-go sdk 的版本也需要安装对应版本
# curl -sfL http://rancher-mirror.cnrancher.com/k3s/k3s-install.sh | INSTALL_K3S_MIRROR=cn sh -
[INFO] Finding release for channel stable
[INFO] Using v1.21.4+k3s1 as release
[INFO] Downloading hash http://rancher-mirror.cnrancher.com/k3s/v1.21.4-k3s1/sha256sum-amd64.txt
[INFO] Downloading binary http://rancher-mirror.cnrancher.com/k3s/v1.21.4-k3s1/k3s
[INFO] Verifying binary download
[INFO] Installing k3s to /usr/local/bin/k3s
... 省略初始化环境
通过命令创建一些工作负载， 以便后续 k8s api 调用查看
这里创建了两个 deployment:
- my-nginx-1 : 1 个 pod
- my-nginx-2 : 2 个 pod
# kubectl create deployment my-nginx-1 --image=nginx:alpine
deployment.apps/my-nginx-1 created
# kubectl create deployment my-nginx-2 --image=nginx:alpine --replicas=2
deployment.apps/my-nginx-2 created通过 kubectl 命令查看结果
# kubectl get pod
NAME READY STATUS RESTARTS AGE
my-nginx-1-6d9577949b-98hzv 1/1 Running 0 105s
my-nginx-2-cd544c6f7-sf68x 1/1 Running 0 91s
my-nginx-2-cd544c6f7-zm974 1/1 Running 0 91s复制 k3s config 文件
之后将使用 config 文件的访问链接访问 k3s 集群。
下载 config /etc/rancher/k3s/k3s.yaml 文件到本地， 并修改链接地址。
apiVersion: v1
clusters:
- cluster:
certificate-authority-data: XXXXXXyyyyzzzzz
server: https://your-k3s-host:6443
name: default
# ... 省略目录结构
# tree
.
├── README.md
├── cmd
│ └── k8sailor
│ ├── k8sconfig
│ │ └── config.yml
│ └── main.go