springboot bootstrap.yml多环境配置 & k8s配置容器hosts

川长思鸟来 2023-01-23 08:51 10阅读 0赞

# 一、springboot配置多个nacos服务器 #

## 1.1 bootstrap.yml配置单环境，Dockerfile打包时指定nacos地址 ##

bootstrap.yml

server:
      port: 9999
    
    spring:
      application:
        name: @artifactId@
      cloud:
        nacos:
          discovery:
            server-addr: ${NACOS_HOST:cbam-register}:${NACOS_PORT:8848}
            namespace: ${NACOS_NAME_SPACE:2b6e230c-de4e-4005-af5f-1ee07dc45a74}
          config:
            server-addr: ${spring.cloud.nacos.discovery.server-addr}
            namespace: ${NACOS_NAME_SPACE:2b6e230c-de4e-4005-af5f-1ee07dc45a74}
            group: ${NACOS_GROUP:DEV}
            file-extension: yml
            shared-configs[0]:
              data-id: application.${spring.cloud.nacos.config.file-extension}
              group: ${NACOS_GROUP:DEV}

Dockerfile

FROM harbor.dcos.local/platpublic/java:8
    MAINTAINER cbam-auth-gateway
    ARG JAR_FILE
    COPY target /usr/local/jar/
    RUN cp /usr/local/jar/cbam-gateway.jar  /usr/local/jar/cbam-auth-gateway.jar
    ENTRYPOINT ["java","-jar","/usr/local/jar/cbam-auth-gateway.jar","--spring.profiles.active=tg","--spring.cloud.nacos.config.group=TG","--spring.cloud.nacos.discovery.server-addr=172.24.131.153:8848"]
    
    ENV TZ=Asia/Shanghai \
        DEBIAN_FRONTEND=noninteractive
    RUN ln -fs /usr/share/zoneinfo/${TZ} /etc/localtime \
        && echo ${TZ} > /etc/timezone \
        && dpkg-reconfigure --frontend noninteractive tzdata \
        && rm -rf /var/lib/apt/lists/*

## 1.2 bootstrap.yml配置多环境，Dockerfile打包时指定环境 ##

bootstrap.yml

server:
      port: 9999
    spring:
      profiles:
        active: dev
    
    ---
    # 开发环境配置
    
    spring:
      application:
        name: @artifactId@
      cloud:
        nacos:
          discovery:
            server-addr: ${NACOS_HOST:cbam-register}:${NACOS_PORT:8848}
            namespace: ${NACOS_NAME_SPACE:2b6e230c-de4e-4005-af5f-1ee07dc45a74}
          config:
            server-addr: ${spring.cloud.nacos.discovery.server-addr}
            namespace: ${NACOS_NAME_SPACE:2b6e230c-de4e-4005-af5f-1ee07dc45a74}
            group: ${NACOS_GROUP:DEV}
            file-extension: yml
            shared-configs[0]:
              data-id: application.${spring.cloud.nacos.config.file-extension}
              group: ${NACOS_GROUP:DEV}
      config:
        activate:
          on-profile: dev
    
    ---
    # 测试环境配置
    spring:
      application:
        name: @artifactId@
      cloud:
        nacos:
          discovery:
            server-addr: 172.24.131.153:8848
            namespace: ${NACOS_NAME_SPACE:2b6e230c-de4e-4005-af5f-1ee07dc45a74}
          config:
            server-addr: ${spring.cloud.nacos.discovery.server-addr}
            namespace: ${NACOS_NAME_SPACE:2b6e230c-de4e-4005-af5f-1ee07dc45a74}
            group: ${NACOS_GROUP:TG}
            file-extension: yml
            shared-configs[0]:
              data-id: application.${spring.cloud.nacos.config.file-extension}
              group: ${NACOS_GROUP:TG}
      config:
        activate:
          on-profile: tg

Dockerfile

FROM harbor.dcos.local/platpublic/java:8
    MAINTAINER cbam-auth-gateway
    ARG JAR_FILE
    COPY target /usr/local/jar/
    RUN cp /usr/local/jar/cbam-gateway.jar  /usr/local/jar/cbam-auth-gateway.jar
    ENTRYPOINT ["java","-jar","/usr/local/jar/cbam-auth-gateway.jar","--spring.profiles.active=tg"]
    
    ENV TZ=Asia/Shanghai \
        DEBIAN_FRONTEND=noninteractive
    RUN ln -fs /usr/share/zoneinfo/${TZ} /etc/localtime \
        && echo ${TZ} > /etc/timezone \
        && dpkg-reconfigure --frontend noninteractive tzdata \
        && rm -rf /var/lib/apt/lists/*

# 二、k8s配置容器hosts #

k8s deployment.yml

apiVersion: apps/v1
    kind: Deployment
    metadata:
      name: cbam-auth-gateway-deployment
      labels:
        app: cbam-auth-gateway
    spec:
      replicas: 1
      selector:
        matchLabels:
          app: cbam-auth-gateway
      template:
        metadata:
          labels:
            app: cbam-auth-gateway
        spec:
          hostAliases:
            - ip: "172.24.131.153"
              hostnames:
                - "cbam-register"
                - "cbam-gateway"
                - "cbam-mysql"
            - ip: "172.25.32.12"
              hostnames:
                - "cbam-redis"
            - ip: "172.25.89.2"
              hostnames:
                - "cbam-oracle"
          containers:
            - name: cbam-auth-gateway
           
           ...

# 三、注意 #

> 1、由于我的spring.cloud.nacos.config.shared-configs 写死为 application.yml 了，所以nacos配置中心配置多环境时只能用Group来区分了，不可以使用类似application-dev.yml这种写法了，这样是读不到的。所以nacos配置管理中的不同环境shared-configs的Data Id应该名称都为application.yml，通过不同的Group值来区分不同环境的配置。  
> 2、docker容器中应用使用hosts的话在deployment.yml中配置hosts即可，配置方式就是上文 “二、k8s配置容器hosts” 的方式，这样容器启动后进入容器通过cat /etc/hosts命令可以查到已配置的hosts信息。  
> 3、通过2的方式配置的hosts在容器启动时还未生效，如果只配置此处可能导致容器无法正常启动，例如nacos注册中心地址也通过hosts的方式配在了微服务的boostrap.yml里面，则docker制作镜像时需要指定nacos地址，具体方法就是上文 " 一、springboot配置多个nacos服务器" 中的两种方法。