大家好
我pull了一个centos的镜像,然后创建了一个容器并在容器里安装了jdk和tomcat,然后用这个容器commit了一个镜像
现在我新建了一个dockerfile
[root@localhost tomcat]# cat dockerfile
# This is a comment
FROM tomcat_lwc
ENV JAVA_HOME /usr/local/jdk
ENV PATH $JAVA_HOME/bin:$PATH
ENV CLASSPATH .:$JAVA_HOME/lib/dt.jar:$JAVA_HOME/lib/tools.jar
ENTRYPOINT /usr/local/apache-tomcat-6.0.48/bin/startup.sh
然后build
[root@localhost tomcat]# docker build -t="tomcat/tomcat:v1" .
Sending build context to Docker daemon 2.048 kB
Step 1 : FROM tomcat_lwc
---> 22e384c39e73
Step 2 : ENV JAVA_HOME /usr/local/jdk
---> Running in e16bcd9f9294
---> e54c42d6e035
Removing intermediate container e16bcd9f9294
Step 3 : ENV PATH $JAVA_HOME/bin:$PATH
---> Running in 6d1c952f3cbe
---> 3636c587ff16
Removing intermediate container 6d1c952f3cbe
Step 4 : ENV CLASSPATH .:$JAVA_HOME/lib/dt.jar:$JAVA_HOME/lib/tools.jar
---> Running in a20cefe5c560
---> 2bdb6503b4b2
Removing intermediate container a20cefe5c560
Step 5 : ENTRYPOINT /usr/local/apache-tomcat-6.0.48/bin/startup.sh
---> Running in 099551e8b854
---> 0595dc909e8e
Removing intermediate container 099551e8b854
Successfully built 0595dc909e8e
成功后,run一个新的容器
[root@localhost tomcat]# docker run -d -p 800:8080 --name tomcat1 tomcat/tomcat:v1
f741de1139edd26d4760a9e601a3b3658689e3bca5f89e56eadc1a76b2923e68
[root@localhost tomcat]# docker ps -a
\CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
f741de1139ed tomcat/tomcat:v1 "/bin/sh -c /usr/loca" 5 seconds ago Exited (0) 4 seconds ago tomcat1
47520f1d12d2 centos "/bin/bash" 2 days ago Exited (127) 3 minutes ago focused_ramanujan
发现这个容器没启动,而且就算docker start ID,也是一样,容器的状态一直都是Exited
我是初学docker的,都是按照网上的教程来做,不知道哪里出错了,求指点
启动不了有很多原因,比如java环境变量是否设置成功,可以先用docker ps看看有没有容器运行