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Kubernetes,VolumeMounts是一个文件,不是一个目录

kubernetes

0

user84592 · 技术社区 · 7 年前

我将使用K8S来编排docker容器。在k8s中,我需要从主机目录复制一个文件( /configs/nginx/cas-server.conf )到pod容器目录( /etc/nginx/nginx.conf ),但当前的k8s只允许装载目录,不允许装载/复制文件。如何解决这个问题?

下面是我的nginx-cas-server-deply.yaml文件。

apiVersion: extensions/v1beta1
kind: Deployment
metadata:
  name: nginx-cas-server-depl
spec:
  replicas: 1
  template:
    metadata:
      labels:
        app: nginx-cas-server-pod
    spec:
      containers:
      - name: nginx-cas-server-pod
        image: nginx
        imagePullPolicy: Never
        ports:
          - containerPort: 100
        volumeMounts:
        - mountPath: /etc/nginx/nginx.conf
          name: nginx-cas-server-conf
        - mountPath: /app/cas-server/public
          name: nginx-cas-server-public
      volumes:
      - name: nginx-cas-server-conf
        hostPath:
          path: /configs/nginx/cas-server.conf
      - name: nginx-cas-server-public
        hostPath:
          path: /cas-server/public

3 回复 | 直到 7 年前

1

10

Artem Golenyaev 7 年前

mountPath 具有目录和姓名及 subPath 野战文件 /etc/nginx/nginx.conf nginx.conf

以下是一个例子:

# ls /config/
nginx.conf  some_dir

Nginx部署的配置文件

apiVersion: extensions/v1beta1
kind: Deployment
metadata:
  labels:
    run: nginx
  name: nginx
  namespace: default
spec:
  replicas: 1
  selector:
    matchLabels:
      run: nginx
  template:
    metadata:
      labels:
        run: nginx
    spec:
      containers:
      - image: nginx
        name: nginx
        volumeMounts:
        - mountPath: /etc/nginx/nginx.conf 
          name: test
          subPath: nginx.conf
      volumes:
      - hostPath:
          path: /config
        name: test

2

1

Prafull Ladha 7 年前

您可以使用hostPath将文件从主机装载到吊舱,我正在为我的elasticsearch集群执行此操作,我希望将我的elasticsearch.yml文件从主机装载到吊舱。

您需要记住,文件是装入的(不是复制的),因此您在一个文件中所做的更改会反映在两个位置。请看下面的内容 yaml文件:

{
  "kind": "StatefulSet",
  "apiVersion": "apps/v1beta1",
  "metadata": {
    "name": "ES",
    "labels": {
      "state": "es"
    }
  },
  "spec": {
      "spec": {
        "containers": [
          {
            "name": "es",
            "image": "",
            "imagePullPolicy": "IfNotPresent",
            "command": [
              "/bin/sh",
              "-c"
            ],
            "volumeMounts": [
              {
                "mountPath":"/data/elasticsearch/conf/elasticsearch.yml",
                "name":"esconf"
              }
            ]
          }
        ],
        "volumes": [
          {
            "name": "esconf",
            "hostPath": {
              "path": "/prafull/data/md_elasticsearch.yml",
              "type": "FileOrCreate"
            }
          }
        ],
        "restartPolicy": "Always",
        "imagePullSecrets": [
          {
            "name": "gcr-imagepull-json-key"
          }
        ]
      }
    }
  }
}

3

0

unnik 7 年前

Kubernetes装载整个文件夹,因此该文件夹的所有内容都将对您的容器可见。

您可以创建指向该文件的符号链接,而不是复制该文件 /etc/nginx/nginx.conf /configs/nginx/cas-server.conf . 但要做到这一点,理想的方法是更新docker映像的入口点

参考链接 https://www.cyberciti.biz/faq/creating-soft-link-or-symbolic-link/