springboot bootstrap.yml多环境配置 & k8s配置容器hosts
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: ${NACOS_GROUP:DEV} 复制代码Dockerfile
FROM harbor.dcos.local/platpublic/java:8 MAINTAINER cbam-auth-gateway ARG JAR_FILE COPY target /usr/local/jar/ RUN cp /usr/local/jar/cbam-gateway.jar /usr/local/jar/cbam-auth-gateway.jar ENTRYPOINT ["java","-jar","/usr/local/jar/cbam-auth-gateway.jar","--spring.profiles.active=tg","--spring.cloud.nacos.config.group=TG","--spring.cloud.nacos.discovery.server-addr=172.24.131.153:8848"] ENV TZ=Asia/Shanghai \ DEBIAN_FRONTEND=noninteractive RUN ln -fs /usr/share/zoneinfo/${TZ} /etc/localtime \ && echo ${TZ} > /etc/timezone \ && dpkg-reconfigure --frontend noninteractive tzdata \ && rm -rf /var/lib/apt/lists/* 复制代码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: ${NACOS_GROUP:TG} config: activate: on-profile: tg 复制代码Dockerfile
FROM harbor.dcos.local/platpublic/java:8 MAINTAINER cbam-auth-gateway ARG JAR_FILE COPY target /usr/local/jar/ RUN cp /usr/local/jar/cbam-gateway.jar /usr/local/jar/cbam-auth-gateway.jar ENTRYPOINT ["java","-jar","/usr/local/jar/cbam-auth-gateway.jar","--spring.profiles.active=tg"] ENV TZ=Asia/Shanghai \ DEBIAN_FRONTEND=noninteractive RUN ln -fs /usr/share/zoneinfo/${TZ} /etc/localtime \ && echo ${TZ} > /etc/timezone \ && dpkg-reconfigure --frontend noninteractive tzdata \ && rm -rf /var/lib/apt/lists/* 复制代码二、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 ... 复制代码
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。
作者：beyond_champion
链接：https://juejin.cn/post/7026518354630279204