kubernetes - pod 应用程序存储在 PV 持久存储上的文件在主机上不可见 [GKE]

Question

pod 应用程序存储在 PV 持久存储上的文件在主机上不可见。配置显示没有错误。配置 - 单个 pv、pvc、pod。 我对这个环境还很陌生。

PV:

apiVersion: v1
kind: PersistentVolume
metadata:
  name: notowania-pv
spec:
  storageClassName: manual
  capacity:
    storage: 10Gi #Size of the volume
  accessModes:
    - ReadWriteOnce #type of access
  hostPath:
    path: "/home/user1684/dane" #host location

光伏状态:

NAME           CAPACITY   ACCESS MODES   RECLAIM POLICY   STATUS   CLAIM                  STORAGECLASS   REASON   AGE
notowania-pv   10Gi       RWO            Retain           Bound    default/notowania-pv   manual                  22m

聚氯乙烯:

apiVersion: v1
kind: PersistentVolumeClaim
metadata:
  name: notowania-pv
spec:
  storageClassName: manual
  accessModes:
    - ReadWriteOnce
  resources:
    requests:
      storage: 10Gi

PVC状态:

NAME           STATUS   VOLUME         CAPACITY   ACCESS MODES   STORAGECLASS   AGE
notowania-pv   Bound    notowania-pv   10Gi       RWO            manual         24m

pods :

apiVersion: "apps/v1"
kind: "Deployment"
metadata:
  name: "notowania"
  namespace: "default"
  labels:
    app: "notowania"
spec:
  replicas: 1
  selector:
    matchLabels:
      app: "notowania"
  template:
    metadata:
      labels:
        app: "notowania"
    spec:
      containers:
      - name: "selenium-docker-sha256"
        image: "eu.gcr.io/firstapp-249912/selenium_docker@sha256:da15e666c3472e93979d821c912c2855951e579a91238f35f0e339b85343ed6b"
        volumeMounts:
        - name: notowania
          mountPath: /notowania
      volumes:
      - name: notowania 
        persistentVolumeClaim:
          claimName: notowania-pv

容器状态:

NAME                         READY   STATUS    RESTARTS   AGE
notowania-79d68c8c56-79q55   1/1     Running   0          25m

pod 上的文件:

user1684@cloudshell:~ (firstapp-249912)$ kubectl exec -it  notowania-79d68c8c56-79q55 -- /bin/bash
root@notowania-79d68c8c56-79q55:/usr/src/app# ll /notowania/
total 8
drwxr-xr-x 2 root root 4096 Sep 18 12:54 ./
drwxr-xr-x 1 root root 4096 Sep 18 12:51 ../
-rw-r--r-- 1 root root    0 Sep 18 12:54 aaa

主机上的文件:

user1684@cloudshell:~ (firstapp-249912)$ pwd
/home/user1684
user1684@cloudshell:~ (firstapp-249912)$ ll dane
total 8
drwxr-xr-x  2 user1684 user1684 4096 Sep 17 23:13 ./
drwxr-xr-x 15 user1684 user1684 4096 Sep 18 14:47 ../

所以我不知道为什么 aaa 在谷歌云的主机上不可见 - 因为我认为“aaa”文件应该在这里。

Answer 1

我认为问题是由您在哪个主机上检查目录内容引起的。

• 您已在“cloudshell”虚拟机上执行了最后一条命令，该虚拟机仅用于与 GCP 交互，并非集群节点。
• 您应该在集群节点上检查它。
• 要检查集群节点的状态，您应该执行以下操作:

$ gcloud compute instances list 
NAME                                     ZONE            MACHINE_TYPE  PREEMPTIBLE  INTERNAL_IP  EXTERNAL_IP    STATUS
gke-tt-test1-default-pool-a4cf7d86-rgt2  europe-west3-a  g1-small                   10.156.0.2   1.2.3.4  RUNNING

$ gcloud compute ssh gke-tt-test1-default-pool-a4cf7d86-rgt2 

user@gke-tt-test1-default-pool-a4cf7d86-rgt2 ~ $ ls -la /home/user1684/dane
total 8
drwxr-xr-x 2 root root 4096 Sep 18 14:16 .
drwxr-xr-x 3 root root 4096 Sep 18 14:12 ..
-rw-r--r-- 1 root root    0 Sep 18 14:16 aaa