如何从kubernetes pod获取配置

Question

我有一个在docker容器上运行的弹簧靴微服务，下面是dockerfile

FROM java:8-jre
MAINTAINER <>
WORKDIR deploy/
#COPY config/* /deploy/config/
COPY ./ms.console.jar /deploy/
CMD chmod +R 777 ./ms.console.jar
CMD ["java","-jar","/deploy/ms.console.jar","console"]
EXPOSE 8384

在这里，我的配置存储在外部文件夹中，即/config/console-server.yml，当我启动应用程序时，它将在内部加载配置(Spring Boot功能(。

现在，我想使用ConfigMap分开此配置，因为我只是创建了一个ConfigMap并存储所有配置详细信息。

kubectl创建configmap console-configmap -from-file =。/config/console-server.yml

kubectl描述configmap console-configmap

以下是描述详细信息：

Name:         console-configmap
Namespace:    default
Labels:       <none>
Annotations:  <none>
Data
====
console-server.yml:
----
server:
  http:
    port: 8385
  compression:
    enabled: true
    mime-types: application/json,application/xml,text/html,text/xml,text/plain,text/css,application/javascript
    min-response-size: 2048
---
spring:
  thymeleaf:
    prefix: classpath:/static
  application:
    name: console-service
  profiles:
     active: native
  servlet:
    multipart:
      max-file-size: 30MB
      max-request-size: 30MB
---
host:
  gateway: http://apigateway:4000
  webhook: http://localhost:9000

我的部署yml是：

apiVersion: apps/v1 # for versions before 1.8.0 use apps/v1beta1
kind: Deployment
metadata:
  name: consoleservice1
spec:
  selector:
    matchLabels:
      app: consoleservice
  replicas: 1 # tells deployment to run 3 pods matching the template
  template: # create pods using pod definition in this template
    metadata:
      labels:
        app: consoleservice
    spec:
      containers:
      - name: consoleservice
        image: ms-console
        ports:
        - containerPort: 8384
        imagePullPolicy: Always
        envFrom:
        - configMapRef:
            name: console-configmap
      imagePullSecrets:
        - name: regcresd

我的疑问是，我在Dockerfile中评论了Config文件夹，因此在运行Pods时，由于没有配置而引发了例外，我将如何将此机程configmap注入我的部署，我尝试过的是已经共享的，但是要遇到相同的问题。

Answer 1

首先，您如何在应用程序中使用.yml文件？如果您将YML文件内容作为环境变量消耗，则配置应正常工作。但是我怀疑您想从容器内的配置文件中消耗内容。如果是这种情况，则必须从ConfigMap中创建一个卷，如下所示：

apiVersion: apps/v1 # for versions before 1.8.0 use apps/v1beta1
kind: Deployment
metadata:
  name: consoleservice1
spec:
  selector:
    matchLabels:
      app: consoleservice
  replicas: 1 # tells deployment to run 3 pods matching the template
  template: # create pods using pod definition in this template
    metadata:
      labels:
        app: consoleservice
    spec:
      containers:
      - name: consoleservice
        image: ms-console
        ports:
        - containerPort: 8384
        imagePullPolicy: Always
        volumeMounts:
          - mountPath: /app/config
            name: config
      volumes:
        - name: config
          configMap:
            name: console-configmap
      imagePullSecrets:
        - name: regcresd

该文件将在路径/app/config/console-server.yml中可用。您必须根据需要对其进行修改。

Answer 2

您需要加载键：从配置文件作为环境变量的值对，然后规格下方可以正常工作

envFrom:
        - configMapRef:
            name: console-configmap

如果您需要config作为pod中的文件，则将configmap安装为卷。以下链接将很有帮助https://kubernetes.io/docs/tutorials/configuration/configure-redis-using-configmap/