Kubernetes pod 在 crashloopbackoff

Question

我是 Kubernetes 的新手。

以下是我正在運行的 yaml：

---
apiVersion: v1
kind: Service
metadata:
  labels:
    app.kubernetes.io/name: k8-demo-aishwarya
    app.kubernetes.io/version: version1
  name: k8-demo-aishwarya
spec:
  ports:
  - name: http
    port: 80
    targetPort: 80
  selector:
    app.kubernetes.io/name: k8-demo-aishwarya
    app.kubernetes.io/version: version1
  type: ClusterIP
---
apiVersion: apps/v1
kind: Deployment
metadata:
  labels:
    app.kubernetes.io/name: k8-demo-aishwarya
    app.kubernetes.io/version: version1
  name: k8-demo-aishwarya
spec:
  replicas: 1
  selector:
    matchLabels:
      app.kubernetes.io/name: k8-demo-aishwarya
      app.kubernetes.io/version: version1
  template:
    metadata:
      labels:
        app.kubernetes.io/name: k8-demo-aishwarya
        app.kubernetes.io/version: version1
    spec:
      containers:
      - env:
        - name: KUBERNETES_NAMESPACE
          valueFrom:
            fieldRef:
              fieldPath: metadata.namespace
        image: docker.io/aishvaryaps/spring-boot-on-kubernetes-example:0.12-SNAPSHOT
        imagePullPolicy: IfNotPresent
        name: k8-demo-aishwarya
        ports:
        - containerPort: 80
          name: http
          protocol: TCP

---

收到 crashloopbackoff 錯誤

誰能指導我？

圖像沒有問題，它運行正常，我已經在 Docker 上測試過了。

Kubernetes pod 日志如下：

1. Successfully assigned default/k8-demo-aishwarya-fdd8d58c6-lvxp9 to gke-cluster-3-pool-1-997819b9-j3b2
2. Container image "docker.io/aishvaryaps/spring-boot-on-kubernetes-example:0.12-SNAPSHOT" already present on machine
3. Created container k8-demo-aishwarya
4. Started container k8-demo-aishwarya
5. Back-off restarting failed container

Answer 1

請查看 POD 的日志以獲取更多詳細信息，但我認為這是由於處理在容器內結束Hello World by Aishwarya S! 您可以通過日志檢查相同的內容。

您可以通過在 YAML 中添加行來繼續運行 pod：

command: ["/bin/sh", "-ec", "sleep 1000"]

此命令保持 pod 運行

apiVersion: apps/v1
kind: Deployment
metadata:
  labels:
    app.kubernetes.io/name: k8-demo-aishwarya
    app.kubernetes.io/version: version1
  name: k8-demo-aishwarya
spec:
  replicas: 1
  selector:
    matchLabels:
      app.kubernetes.io/name: k8-demo-aishwarya
      app.kubernetes.io/version: version1
  template:
    metadata:
      labels:
        app.kubernetes.io/name: k8-demo-aishwarya
        app.kubernetes.io/version: version1
    spec:
      containers:
      - env:
        - name: KUBERNETES_NAMESPACE
          valueFrom:
            fieldRef:
              fieldPath: metadata.namespace
        image: docker.io/aishvaryaps/spring-boot-on-kubernetes-example:0.12-SNAPSHOT
        command: ["/bin/sh", "-ec", "sleep 1000"]
        imagePullPolicy: IfNotPresent
        name: k8-demo-aishwarya
        ports:
        - containerPort: 80
          name: http
          protocol: TCP

Answer 2

容器正在運行，正在打印 hello world 消息並退出。 請參閱下面的容器日志。

$ docker ps -a
CONTAINER ID        IMAGE                                                         COMMAND                  CREATED             STATUS                      PORTS               NAMES
2b177abdbae1        aishvaryaps/spring-boot-on-kubernetes-example:0.12-SNAPSHOT   "/bin/sh -c 'java ${…"   12 seconds ago      Exited (0) 10 seconds ago                       dummy


$ docker logs -f 2b1
Hello World by Aishwarya S!

如果要保持容器運行，容器內部的進程應該繼續運行。 您可能需要從 while 或 for 循環中打印消息。