Kubernetes practice

核心概念

1. 创建命名空间与 pod

# List namespaces
kubectl get namespaces
kubectl get ns

# Create namespace
kubectl create namespace mynamespace
kubectl create ns mynamespace

# run nginx pod
kubectl run nginx --image=nginx -n mynamespace

kubectl get pods --namespace mynamespace

2. 利用 yaml 创建 pod

apiVersion: v1
kind: Pod
metadata:
  name: nginx-yaml-file
  namespace: mynamespace
spec:
  containers:
    - name: nginx
      image: nginx

kubectl create -f nginx_pod.yaml

# 自动生成 yaml 文件
kubectl run nginx --image=nginx --dry-run=client -n mynamespace -o yaml > pod.yaml

3. 使用命令创建执行某一条命令的 pod, 并查看日志

kubectl run busybox --image=busybox --command -- env
kubectl logs busybox

4. 使用 yaml 创建执行某一条命令的 pod

apiVersion: v1
kind: Pod
metadata:
    createionTimestamp: null
    labels:
        run: busybox
    name: busybox
spec:
    containers:
    - command:
        - env
        image: busybox
        name: busybox
        resources: {}
    dnsPolicy: ClusterFirst
    restartPolicy: Always
status: {}

kubectl create -f pod.yaml