# 1. 创建 YAML 文件
# deployment.yaml

# 2. 应用配置
$ kubectl apply -f deployment.yaml

# 3. 查看 Deployment
$ kubectl get deployments

# 4. 查看 Pod
$ kubectl get pods

# 基础创建
$ kubectl create deployment nginx --image=nginx

# 指定副本数
$ kubectl create deployment nginx --image=nginx --replicas=3

# 指定端口
$ kubectl create deployment nginx --image=nginx --port=80

# 导出 YAML（不执行，只生成配置）
$ kubectl create deployment nginx --image=nginx --dry-run=client -o yaml > deployment.yaml

# 1. 创建 deployment.yaml
cat <<EOF > deployment.yaml
apiVersion: apps/v1
kind: Deployment
metadata:
  name: nginx-deployment
spec:
  replicas: 3
  selector:
    matchLabels:
      app: nginx
  template:
    metadata:
      labels:
        app: nginx
    spec:
      containers:
      - name: nginx
        image: nginx:1.24
        ports:
        - containerPort: 80
EOF

# 2. 应用配置
$ kubectl apply -f deployment.yaml
deployment.apps/nginx-deployment created

# 3. 查看 Deployment
$ kubectl get deployment nginx-deployment
NAME               READY   UP-TO-DATE   AVAILABLE   AGE
nginx-deployment   3/3     3            3           10s

# 4. 查看 ReplicaSet
$ kubectl get rs
NAME                          DESIRED   CURRENT   READY   AGE
nginx-deployment-5d8f4c4c5    3         3         3       10s

# 5. 查看 Pod
$ kubectl get pods
NAME                                READY   STATUS    RESTARTS   AGE
nginx-deployment-5d8f4c4c5-abc12   1/1     Running   0          10s
nginx-deployment-5d8f4c4c5-def34   1/1     Running   0          10s
nginx-deployment-5d8f4c4c5-ghi56   1/1     Running   0          10s

# 查看 Deployment 详情
$ kubectl describe deployment nginx-deployment

# 查看 YAML 配置（运行中的）
$ kubectl get deployment nginx-deployment -o yaml

# 查看事件
$ kubectl get events --field-selector involvedObject.name=nginx-deployment

# 等待 Deployment 完全就绪
$ kubectl rollout status deployment/nginx-deployment

# 设置超时时间
$ kubectl rollout status deployment/nginx-deployment --timeout=60s

# 你的命令

# 查看 Pod 事件
$ kubectl describe pod <pod-name>

# 常见原因：
# - 资源不足
# - 节点有 taint
# - PVC 未绑定

# 查看日志
$ kubectl logs <pod-name>

# 查看前一个容器的日志
$ kubectl logs <pod-name> --previous

# 常见原因：
# - 镜像不存在
# - 应用启动失败
# - 配置错误

# 查看事件
$ kubectl describe pod <pod-name>

# 常见原因：
# - 镜像名称错误
# - 私有仓库需要 imagePullSecrets
# - 网络问题