docsify/docs/install/kubernetes-use.md

Kubernetes

Namespace

只隔离资源 不隔离网络

• 查看

kubectl get namespace/ns

• 创建

# 创建配置文件
vi hello-namespace.yml

apiVersion: v1
kind: Namespace
metadata:
  name: hello-namespace

kubectl apply -f hello-namespace.yml

• 删除

kubectl delete -f hello-namespace.yml

Pod

是多个容器的组合

• 查看

kubectl get pod [-n <namespace>/ -A] [-owide]

• 创建

vi hello-niginx.yml

apiVersion: v1
kind: Pod
metadata:
  labels:
    run: hello-nginx
  name: hello-nginx
#  namespace: default
spec:
  containers:
  - image: nginx
    name: hello-nginx

kubectl apply -f hello-niginx.yml

• 删除

kubectl delete -f hello-niginx.yml

Deployment

• 查看

kubectl get deploys [-n <namespace>/ -A]

• 创建

vi hello-deploy.yml

apiVersion: apps/v1
kind: Deployment
metadata:
  labels:
    app: hello-deploy
  name: hello-deploy
spec:
  replicas: 3 # 创建三个副本
  selector:
    matchLabels:
      app: hello-deploy
  template:
    metadata:
      labels:
        app: hello-deploy
    spec:
      containers:
      - image: nginx
        name: hello-nginx

kubectl apply -f hello-deploy.yml

• 删除

kubectl delete -f hello-deploy.yml

Pod

查看

查看指定命名空间的 pod

kubectl get pods -n default
kubectl get pods -n kube-system

查看所有命名空间的 pod

kubectl get pods -A

查看 pod 详细信息

kubectl get pods -o wide -A

实时监控 pod 详细信息

kubectl get pods -o wide -A -w

描述 pod 详细信息

kubectl describe pod xxxxx

查看 pod 命名帮助信息

kubectl get pods --help

创建

命令行创建

kubectl run nginx --image=nginx

创建路径

mkdir -p /usr/local/kubernetes/config/ && cd /usr/local/kubernetes/config/

配置文件创建

cat > nginx-pod.yml <<'EOF'
apiVersion: v1
kind: Pod
metadata:
  name: nginx
spec:
  containers:
    - name: nginx
      image: nginx
      ports: 
        - containerPort: 80
EOF