Shulou(Shulou.com)06/01 Report--

In this issue, the editor will bring you about how to self-start the application service in the Docker container. The article is rich and analyzed and described from a professional point of view. I hope you can get something after reading this article.

Write a service self-startup script (dockerd)

(tomcat as an example)

#! / bin/bash## chkconfig: 345 98 30# description: tomcat program.# processname: tomcat# Source function library.. / etc/rc.d/init.d/functions# Source networking configuration.#. / etc/sysconfig/networkprog= "tomcat" checkprocess () {chkret= `ps-ef | grep $prog | grep-v "grep" | wc-l`return $chkret} start () {cd / usr/local/tomcat/bin/. / startup.sh echo "Service $prog started!"} # / usr/sbin/nscd & / usr/sbin/sshd-D & while [true] do DNSIP=172.18.3.179 ping= `ping-c 3$ DNSIP | awk 'NR==7 {print $4} `if [$ping- Eq "3"] then break fi sleep 3donewhile [true] do checkprocess if [[$chkret-eq "0"]] then start # nscd-i hosts else echo "Service $prog is running." Fi sleep 60doneexit 0

Write Dockerfile

FROM tomcatMAINTAINER liu "350142639@qq.com" ADD dockerd / etc/rc.d/init.d/RUN chmod 777 / etc/rc.d/init.d/dockerdENV JAVA_HOME/ usr/local/jdk1.6.0_30ENV PATH $JAVA_HOME/bin:$PATHENV CLASSPATH.: $JAVA_HOME/lib/dt.jar:$JAVA_HOME/lib/tools.jarCMD / etc/rc.d/init.d/dockerd

Among them, ADD adds the scripts under the same directory to the specified location of the image, and ENV sets the environment variable of java (it is important that the self-startup script cannot be executed successfully without writing this sentence) there can be only one CMD command, which is used to execute the command when the container starts. It could also be a script.

Reconstruct the image

* * approved

Docker build-t new image name.

Successfully create a new mirror image

Open the container

Docker run-d-h = "s"-name= "s" new image name

Then, it is found that tomcat has been turned on

The above is how to start the application service in the Docker container. If you happen to have similar doubts, please refer to the above analysis to understand. If you want to know more about it, you are welcome to follow the industry information channel.

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