docker-dockerfile-docker镜像制作-基于dockerfile创建（主要方式）

1.创建目录docker

[root@myhost docker]# mkdir /docker

2.接着在docker目录下创建文件夹tomcat

[root@myhost docker]# pwd
/docker
[root@myhost docker]# mkdir tomcat

3.上传jdk和tomcat安装包到/docker/tomcat目录下

apache-tomcat-8.5.93.tar.gz
zulu8.72.0.17-ca-jdk8.0.382-linux_x64.tar.gz

4.编写Dockerfile

[root@myhost tomcat]# cat Dockerfile 
FROM centos:7
MAINTAINER [liangbosheng]
 
ADD zulu8.72.0.17-ca-jdk8.0.382-linux_x64.tar.gz /usr/local
ADD apache-tomcat-8.5.93.tar.gz /usr/local
 
WORKDIR /usr/local
RUN mv apache-tomcat-8.5.93 tomcat
RUN mv zulu8.72.0.17-ca-jdk8.0.382-linux_x64 java
 
ENV JAVA_HOME /usr/local/java
ENV CLASS_PATH $JAVA_HOME/lib/tools.jar:$JAVA_HOME/lib/dt.jar
ENV PATH $JAVA_HOME/bin:$PATH
 
EXPOSE 8080
CMD ["/usr/local/tomcat/bin/catalina.sh","run"]

注：

FROM centos:7 基础镜像 centos:7；
MAINTAINER  维护者信息；
ADD 复制本地文件到容器内。使用ADD不使用COPY是因为ADD可以使归档文件（例如.tar或.zip）自动解压；
WORKDIR /usr/local  设置工作目录；
RUN mv apache-tomcat-8.5.93 tomcat  将文件夹重新命名；
RUN mv zulu8.72.0.17-ca-jdk8.0.382-linux_x64 java 将文件夹重新命名；
ENV JAVA_HOME /usr/local/java  ENV：指定一个环境变量，会被后续 RUN 指令使用，并在容器运行时保持；
ENV CLASS_PATH $JAVA_HOME/lib/tools.jar:$JAVA_HOME/lib/dt.jar ENV：指定一个环境变量，会被后续 RUN 指令使用，并在容器运行时保持；
ENV PATH $JAVA_HOME/bin:$PATH ENV：指定一个环境变量，会被后续 RUN 指令使用，并在容器运行时保持；
EXPOSE 8080  设置tomcat容器暴露的端口；
CMD ["/usr/local/tomcat/bin/catalina.sh","run"]  启动命令

5.创建镜像

[root@myhost tomcat]# docker build -t tomcat:new .
Sending build context to Docker daemon  117.6MB
Step 1/12 : FROM centos:7
7: Pulling from library/centos
Digest: sha256:be65f488b7764ad3638f236b7b515b3678369a5124c47b8d32916d6487418ea4
Status: Downloaded newer image for centos:7
 ---> eeb6ee3f44bd
Step 2/12 : MAINTAINER [liangbosheng]
 ---> Running in 4d373a4e8545
Removing intermediate container 4d373a4e8545
 ---> 55a1ad9f34a9
Step 3/12 : ADD zulu8.72.0.17-ca-jdk8.0.382-linux_x64.tar.gz /usr/local
 ---> 2869f2575f13
Step 4/12 : ADD apache-tomcat-8.5.93.tar.gz /usr/local
 ---> 09d0ea2f9acc
Step 5/12 : WORKDIR /usr/local
 ---> Running in 6d42a21bc452
Removing intermediate container 6d42a21bc452
 ---> d3394c3050b6
Step 6/12 : RUN mv apache-tomcat-8.5.93 tomcat
 ---> Running in 9e4b802b9943
Removing intermediate container 9e4b802b9943
 ---> d3fdd58d126b
Step 7/12 : RUN mv zulu8.72.0.17-ca-jdk8.0.382-linux_x64 java
 ---> Running in 67d3eef87be0
Removing intermediate container 67d3eef87be0
 ---> a8330f6d4451
Step 8/12 : ENV JAVA_HOME /usr/local/java
 ---> Running in 5b6598f9ea4a
Removing intermediate container 5b6598f9ea4a
 ---> 6520d2c5e1f9
Step 9/12 : ENV CLASS_PATH $JAVA_HOME/lib/tools.jar:$JAVA_HOME/lib/dt.jar
 ---> Running in 49390f9956d7
Removing intermediate container 49390f9956d7
 ---> b150e50ee1d8
Step 10/12 : ENV PATH $JAVA_HOME/bin:$PATH
 ---> Running in 3d87c95adbb7
Removing intermediate container 3d87c95adbb7
 ---> 41cdef3edcdb
Step 11/12 : EXPOSE 8080
 ---> Running in 21e630b2480a
Removing intermediate container 21e630b2480a
 ---> ff5205c1692b
Step 12/12 : CMD ["/usr/local/tomcat/bin/catalina.sh","run"]
 ---> Running in 25ce9a324eec
Removing intermediate container 25ce9a324eec
 ---> fba6d4b00ae5
Successfully built fba6d4b00ae5
Successfully tagged tomcat:new

-f:指定dockerfile文件，不写默认指定当前目录 -t:指定镜像名称 .:指定当前目录环境中的文件

6.查看所创建的镜像

[root@myhost tomcat]# docker images
REPOSITORY                      TAG                 IMAGE ID            CREATED             SIZE
tomcat                          new                 fba6d4b00ae5        14 seconds ago      658MB

7.创建容器

[root@myhost tomcat]# docker run -itd -p 3333:8080 tomcat:new
4ad7689cb545655131fa6c4b3081e8ee5ce0dd7897d4229af6e80cf3d40db434

8.浏览器访问：IP:3333