如何将jar文件挂载到tomcat容器

Question

我的项目中有一个文件夹，其中包含 1 个属性文件和 1 个 jar 文件（db-driver）文件。

我需要将这两个文件复制到我的 pod 上的 /usr/local/tomcat/lib 目录。我不确定如何在 kubernetes yaml 文件中实现这一点。下面是我的 yaml 文件，我试图在其中使用 configMap 来实现这一点，但 pod 创建失败并出现错误“configmap references non-existent config key: app.properties”

目标/usr/local/tomcat/lib 已经有其他 jar 文件，所以我尝试使用 configMap 不覆盖整个目录，只添加 2 个特定于我的应用程序的文件。

apiVersion: apps/v1
kind: Deployment
metadata:
  name: tomcatdeployment
  labels:
    app:  tomcat
spec:
  replicas: 1
  selector:
    matchLabels:
      app:  tomcat
  template:
    metadata:
      labels:
        app:  tomcat
    spec:
      containers:
        - name: tomcat
          image: tomcat:latest
          imagePullPolicy: IfNotPresent
          volumeMounts:
          - name: appvolume
            mountPath: /usr/local/data
          - name: config
            mountPath: /usr/local/tomcat/lib
            subPath: ./configuration
          ports:
            - name: http
              containerPort: 8080
              protocol: TCP
      volumes:
        - name: appvolume
        - name: config
          configMap:
            name: config-map
            items:
              - key: app.properties
                path: app.properties
---
apiVersion: v1
kind: ConfigMap
metadata:
  name: config-map
data:
  key:  app.properties

当前目录结构...

.
├── configuration
│   ├── app.properties
│   └── mysql-connector-java-5.1.21.jar
├── deployment.yaml
└── service.yaml

请分享您对如何实现这一目标的宝贵反馈。

问候。

Answer 1

请试试这个：

kubectl create configmap config-map --from-file=app.properties --from-file=mysql-connector-java-5.1.21.jar

    apiVersion: apps/v1
    kind: Deployment
    metadata:
      name: tomcatdeployment
      labels:
        app:  tomcat
    spec:
      replicas: 1
      selector:
        matchLabels:
          app:  tomcat
      template:
        metadata:
          labels:
            app:  tomcat
        spec:
          containers:
            - name: tomcat
              image: tomcat:latest
              imagePullPolicy: IfNotPresent
              volumeMounts:
              - name: config
                mountPath: /usr/local/tomcat/lib/conf
              ports:
                - name: http
                  containerPort: 8080
                  protocol: TCP
          volumes:
            - name: config
              configMap:
                name: config-map

或

apiVersion: apps/v1
kind: Deployment
metadata:
  name: tomcatdeployment
  labels:
    app:  tomcat
spec:
  replicas: 1
  selector:
    matchLabels:
      app:  tomcat
  template:
    metadata:
      labels:
        app:  tomcat
    spec:
      containers:
        - name: tomcat3
          image: tomcat:latest
          imagePullPolicy: IfNotPresent
          volumeMounts:
          - name: config
            mountPath: /usr/local/tomcat/lib/app.properties
            subPath: app.properties
          - name: config
            mountPath: /usr/local/tomcat/lib/mysql-connector-java-5.1.21.jar
            subPath: mysql-connector-java-5.1.21.jar
          ports:
            - name: http
              containerPort: 8080
              protocol: TCP
      volumes:
        - name: config
          configMap:
            name: config-map
            items:
            - key: app.properties
              path: app.properties 
            - key: mysql-connector-java-5.1.21.jar
              path: mysql-connector-java-5.1.21.jar

Answer 2

出现此错误是正常的，因为在此卷声明中您提到了该键：app.properties 否则在 configmap 键中：app.properties 所以这里键是键，值是 app.properties 所以你必须在卷中声明更改：

volumes:
        - name: appvolume
        - name: config
          configMap:
            name: config-map
            items:
              - key: app.properties
                path: app.properties

到：

   volumes:
            - name: appvolume
            - name: config
              configMap:
                name: config-map
                items:
                  - key: key
                    path: app.properties

更多信息可以参考这里：add-configmap-data-to-a-volume