一个关于docker镜像缓存的问题

今天做了一个应用镜像的demo，开始的时候，设置的应用的端口是21003，之后，因为docker对外的expose端口是80，为了统一化，遂将应用的启动端口也设置成了80端口，然而，噩梦就来了，无论如何改正，应用启动的端口都是21003端口；进入到docker的容器中，发现，jar中的server.port早就已经更改成了80端口，在容器中启动java -jar server-provider.jar，发现启动的仍然是21003端口；

容器的dockerFile是这样事儿的：

FROM 10.110.152.173:80/base_env/centos:7.6
WORKDIR /root/services
ADD server-provider/target/server-provider.jar  provider/
EXPOSE 80
ENTRYPOINT ["java","-jar","provider/server-provider.jar"]

依赖的容器dockerFile是这样事儿的

FROM centos:7.6.1810
LABEL maintainer=caoyong1
WORKDIR /root
RUN mkdir jdk && mkdir services
COPY jdk1.8.0_231 jdk/jdk1.8
ENV JAVA_HOME=/root/jdk/jdk1.8
ENV PATH=$JAVA_HOME/bin:$PATH
ENV CLASSPATH=.:$JAVA_HOME/lib/dt.jar:$JAVA_HOME/lib/tools.jar
COPY *.repo /etc/yum.repos.d/
RUN yum clean all && yum makecache && yum install -y epel-release && yum clean all && yum makecache
RUN yum -y install iputils && yum -y install net-tools.x86_64 && yum install -y redhat-lsb && yum -y install bridge-utils && yum -y install traceroute && yum -y install vim*

应用的配置是这样事儿的：

server:
  port: 80
  tomcat:
    max-threads: 1000
spring:
  application:
    name: server-provider
  zipkin:
    base-url: http://127.0.0.1:9411
  profiles:
    active: test
ribbon:
  OkToRetryOnAllOperations: false #对所有操作请求都进行重试,默认false
  ReadTimeout: 15000   #负载均衡超时时间，默认值5000
  ConnectTimeout: 10000 #ribbon请求连接的超时时间，默认值2000
  MaxAutoRetries: 2     #对当前实例的重试次数，默认0
  MaxAutoRetriesNextServer: 4 #对切换实例的重试次数，默认1

hystrix:
  command:
    default:  #default全局有效，server id指定应用有效
      execution:
        timeout:
          #是否开启超时熔断
          enabled: true
        isolation:
          thread:
            timeoutInMilliseconds: 1000 #断路器超时时间，默认1000ms
eureka:
  client:
    service-url:
      defaultZone: ${REGISTER_SERVER}/eureka/
  instance:
    prefer-ip-address: true
    metadata-map:
      topic: xxxxxxxxxxxxxxxxxxxxx

最终，我在dockerfile中添加了一个清除语句，竟然神奇的work了。。。。。。

RUN rm -rf /root/services/*

FROM 10.110.152.173:80/base_env/centos:7.6
WORKDIR /root/services
RUN rm -rf /root/services/*
ADD server-provider/target/server-provider.jar  provider/
EXPOSE 80
ENTRYPOINT ["java","-jar","provider/server-provider.jar"]

来源：CSDN

作者：月夜楓

链接：https://blog.csdn.net/cyxinda/article/details/103242570

标签

yum

root

dockerfile

Docker

install

services