利用Dockerfile制作java运行环境的镜像的方法步骤

利用Dockerfile制作java运行环境的镜像的方法步骤

当前用到的环境是：

Centos 7.5

docker-ce 18.06.1-ce

1、先用centos7.5.1804的基础镜像把一些运行需要的环境装好

在/app目录下创建相对应的文件目录

[root@node2 /app/]# mkdir dockerfile/{web/{nginx,tomcat,jdk,apache},system/{centos,ubuntu,redhat}} -pv

[root@node2 /app]# cd dockerfile/system/centos/

[root@node2 /app/dockerfile/system/centos]# mkdir centos-7.5-base

[root@node2 /app/dockerfile/system/centos]# cd centos-7.5-base

创建一个Dockerfile文件

[root@node2 /app/dockerfile/system/centos/centos-7.5-base]#vim Dockerfile

#Nginx Base Image

FROM centos:7.5.1804

LABEL maintaier "mr.luo "

RUN yum install -y vim wget pcre pcre-devel zlib zlib-devel openssl openssl-devel iproute net-tools iotop

创建一个用于直接docker build脚本后续直接执行脚本即可

[root@node2 /app/dockerfile/system/centos/centoshttp://-7.5-base]#vim build-command.sh

#!/bin/bash

docker build -t 172.20.7.50/baseimages/centos-base:7.5.1804 .

执行脚本创建新镜像

[root@node2 /app/dockerfile/system/centos/centos-7.5-base]#bash build-command.sh

Sending build context to Docker daemon 3.072kB

Step 1/3 : FROM centos:7.5.1804

---> 76d6bc25b8a5

Step 2/3 : LABEL maintaier 'mr.luo@dklwj.com'

---> Using cache

---> 05ccd970d71d

Step 3/3 : RUN yum install -y vim wget pcre pcre-devel zlib zlib-devel openssl openssl-devel iproute net-tools iotop

---> Using cache

---> 73d683a54877

Successfully built 73d683a54877

Successfully tagged 172.20.7.50/baseimages/centos-base:7.5.1804

2、利用制作好的基础环境镜像制作jdk的镜像

从centos-7.5-base退出来在当前目录创建一个jdk1.8的目录.

[root@node2 /app/dockerfile/system/centos/centos-7.5-base]# cd ..

[root@node2 /app/dockerfile/system/centos]# mkdir jdk1.8

[root@node2 /app/dockerfile/system/centos]# cd jdk1.8/

创建Dockerfile

[root@node2 /app/dockerfile/system/centos/jdk1.8]#vim Dockerfile

FROM 172.20.7.50/baseimages/centos-base:7.5.1804

LABEL maintainer "mr.luo "

ADD jdk-8u162-linux-x64.tar.gz /usr/local/src/

RUN ln -s /usr/local/src/jdk1.8.0_162/ /usr/local/jdk

ADD profile /etc/profile

ENV java_HOME /usr/local/jdk

ENV JRE_HOME $JAVA_HOME/jre

ENV CLASSPATH $JAVA_HOME/lib/:$JRE_HOME/lib/

ENV PATH $PATH:$JAVA_HOME/bin

RUN rm -rf /etc/localtime && ln -snf /usr/share/zoneinfo/Asia/Shanghai /etc/localtime && echo "Asia/Shanghai" > /etc/timezone

上传jdk包到当前目录下：

复制/etc/profile文件到当前目录

[root@node2 /app/dockerfile/system/centos/jdk1.8]#cp profile /etc/profile

在profile最后添加jdk的环境变量

[root@node2 /app/dockerfile/system/centos/jdk1.8]#vim profile

export JAVA_HOME=/usr/local/jdk

export TOMCAT_HOME=/apps/tomcat

export PATH=$JAVA_HOME/bin:$JAVA_HOME/jre/bin:$TOMCAT_HOME/bin:$PATH

export CLASSPATH=.$CLASSPATH:$JAVA_HOME/lib:$JAVA_HOME/jre/lib:$JAVA_HOME/lib/tools.jar

创建docker build的shell脚本

[root@node2 /app/dockerfile/system/centos/jdk1.8]#vim build-command.sh

#!/bin/bash

#

docker build -t 172.20.7.50/baseimages/centos7.5-jdk:8.162 .

开始制作镜像

[root@node2 /app/dockerfile/system/centos/jdk1.8]#bash build-command.sh

Sending build context to Docker daemon 189.8MB

Step 1/10 : FROM 172.20.7.50/baseimages/centos-base:7.5.1804

---> 73d683a54877

Step 2/10 : LABEL maintainer "mr.luo "

---> Running in 65604dd1f392

Removing intermediate container 65604dd1f392

---> c4720603ce38

Step 3/10 : ADD jdk-8u162-linux-x64.tar.gz /usr/local/src/

---> bc98adffe1b4

Step 4/10 : RUN ln -s /usr/local/src/jdk1.8.0_162/ /usr/local/jdk

---> Running in df5a6f67f9fd

Removing intermediate container df5a6f67f9fd

---> 0ae1af0416c6

Step 5/10 : ADD profile /etc/profile

---> eee23a69c0c8

Step 6/10 : ENV JAVA_HOME /usr/local/jdk

---> Running in edbef8563e83

Removing intermediate container edbef8563e83

---> 5f783f642054

Step 7/10 : ENV JRE_HOME $JAVA_HOME/jre

---> Running in fa0e5f08e732

Removing intermediate container fa0e5f08e732

---> 28a4d31463d4

Step 8/10 : ENV CLASSPATH $JAVA_HOME/lib/:$JRE_HOME/lib/

---> Running in 3c4ebb04ac62

Removing intermediate container 3c4ebb04ac62

---> 245f2dd82d52

Step 9/10 : ENV PATH $PATH:$JAVA_HOME/bin

---> Running in 4f5e6093f0a9

Removing intermediate container 4f5e6093f0a9

---> 5be0e6261eea

Step 10/10 : RUN rm -rf /etc/localtime && ln -snf /usr/share/zoneinfo/Asia/Shanghai /etc/localtime && echo "Asia/Shanghai" > /etc/timezone

---> Running in 52d8cb8463a8

Removing intermediate container 52d8cb8463a8

---> 9fb867ae8c39

Successfully built 9fb867ae8c39

Successfully tagged 172.20.7.50/baseimages/centos7.5-jdk:8.162

查看当前目录下的文件

[root@node2 /app/dockerfile/system/centos/jdk1.8]#ls

build-command.sh Dockerfile jdk-8u162-linux-x64.tar.gz profile

检查制作好的镜像是否能正常使用

[root@node2 /app/dockerfile/system/centos/jdk1.8]#docker run -it --rm 172.20.7.50/baseimages/centos7.5-jdk:8.162 bash

[root@919844b164dc /]# java -version

java version "1.8.0_162"

Java(TM) SE Runtime Environment (build 1.8.0_162-b12)

Java HotSpot(TM) 64-Bit Server VM (build 25.162-b12, mixed mode)

[root@919844b164dc /]# date

Thu Nov 22 21:17:49 CST 2018

[root@919844b164dc /]# exit

exit

3、做Tomcat的镜像

进入之前建好的/app/dockerfile/web/tomcat下,创建一个tomcat-base目录

[root@node2 ~]# cd /app/dockerfile/web/tomcat

[root@node2 /app/dockerfile/web/tomcat]#mkdir tomcat-base

创建Dockerfile

[root@node2 /app/dockerfile/web/tomcat/tomcat-base]#vim Dockerfile

FROM 172.20.7.50/baseimages/centos7.5-jdk:8.162

LABEL maintainer "mr.luo "

RUN mkdir /apps

ADD apache-tomcat-8.5.33.tar.gz /apps

RUN ln -s /apps/apache-tomcat-8.5.33 /apps/tomcat

创建docker build脚本

[root@node2 /app/dockerfile/web/tomcat/tomcat-base]#vim build-command.sh

#!/bin/bash

docker build -t 172.20.7.50/baseimages/centos-tomcat:8.5.33 .

执行创建镜像文件：

[root@node2 /app/dockerfile/web/tomcat/tomcat-base]#bash build-command.sh

Sending build context to Docker daemon 9.625MB

Step 1/5 : FROM 172.20.7.50/baseimages/centos7.5-jdk:8.162

---> 9fb867ae8c39

Step 2/5 : LABEL maintainer "mr.luo "

---> Running in 9ce6fc4d2850

Removing intermediate container 9ce6fc4d2850

---> b68755061b28

Step 3/5 : RUN mkdir /apps

---> Running in b483c6b127f2

Removing intermediate container b483c6b127f2

---> 605c1a048a5f

Step 4/5 : ADD apache-tomcat-8.5.33.tar.gz /apps

---> 3c44f96ed41c

Step 5/5 : RUN ln -s /apps/apache-tomcat-8.5.33 /apps/tomcat

---> Running in 4c1aa39a6c92

Removing intermediate container 4c1aa39a6c92

---> 9b3bc4f58cc9

Successfully built 9b3bc4f58cc9

Successfully tagged 172.20.7.50/baseimages/centos-tomcat:8.5.33

利用创建好的镜像起一个容器检查下是否成功制作好，启动时加上-p暴露端口，在物理机上测试下

[root@node2 /app/dockerfile/web/tomcat/tomcat-base]#docker run -it -p 8802:8080 172.20.7.50/baseimages/centos-tomcat:8.5.33 bash

[root@917b2c2262a3 /]# cd /apps/

[root@917b2c2262a3 apps]# ll

total 0

drwxr-xr-x 9 root root 220 Nov 22 22:08 apache-tomcat-8.5.33

lrwxrwxrwx 1 root root 26 Nov 22 22:08 tomcat -> /apps/apache-tomcat-8.5.33

[root@917b2c2262a3 apps]# ./tomcat/bin/catalina.sh start

Using CATALINA_BASE: /apps/tomcat

Using CATALINA_HOME: /apps/tomcat

Using CATALINA_TMPDIR: /apps/tomcat/temp

Using JRE_HOME: /usr/local/jdk/jre

Using CLASSPATH: /apps/tomcat/bin/bootstrap.jar:/apps/tomcat/bin/tomcat-juli.jar

Tomcat started.

在客户端用浏览器测试

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