Solution to the automatic termination of docker run container

Today I encountered a problem when I used Dockerfile to create an image, and the container ended automatically after the image was run.

Start command:

docker run -d -p 8080:8080 -v /usr/local/tomcat7.0/logs:/usr/local/tomcat7.0/logs --name tomcatweb tomcat:7.0

After running, use docker ps to find that the docker container has ended

After searching for information, I found that this problem is not complicated. The reason is that when the Docker container runs in the background, there must be a foreground process.

Solution:

1. Start the running process in the foreground, such as: nginx nginx -g "daemon off;" tomcat ./catalina.sh run

2. Use tail, top, and other programs that can run in the foreground. Tail is especially recommended to output your log file.

Add ENTRYPOINT /opt/tomcat7.0/bin/startup.sh && tail -F /opt/tomcat7.0/logs/catalina.out to Dockerfile

Additional knowledge: The tomcat pulled by docker pull did not generate logs, so I wrote a tocmat dockerfile file by hand, and it was tested that logs were generated

1. The dockfile file and its explanation are as follows

FROM openjdk:8-jre 
MAINTAINER
 
ENV JAVA_HOME /docker-java-home
ENV CATALINA_HOME /opt/tomcat 
ENV PATH $PATH:$JAVA_HOME/bin:$CATALINA_HOME/bin:$CATALINA_HOME/scripts
 
#Timezone RUN echo "Asia/Shanghai" > /etc/timezone 
RUN mv /etc/localtime /etc/localtime_bak 
RUN cp /usr/share/zoneinfo/Asia/Shanghai /etc/localtime
 
#TOMCAT 
ENV TOMCAT_MAJOR 8
ENV TOMCAT_VERSION 8.5.35
 
RUN wget http://mirrors.tuna.tsinghua.edu.cn/apache/tomcat/tomcat-8/v8.5.41/bin/apache-tomcat-8.5.41.tar.gz && \
 tar -zxvf apache-tomcat-8.5.41.tar.gz && \
 rm apache-tomcat*.tar.gz && \
 mv apache-tomcat* ${CATALINA_HOME} 
 
RUN chmod +x ${CATALINA_HOME}/bin/*sh 
RUN chmod 777 ${CATALINA_HOME}/logs/ 
RUN chmod 777 ${CATALINA_HOME}/webapps/
 
#Set username and password to admin 
ADD tomcat-users.xml /opt/tomcat/conf/
 
#Remote access ADD context.xml /opt/tomcat/webapps/manager/META-INF/
 
ENV LANG zh_CN.UTF-8
 
#Open port EXPOSE 8080
 
# Launch Tomcat 
WORKDIR /opt/tomcat/bin
CMD ["catalina.sh","run"]

Note: This docker needs to reference external files

See github for details

2. Dockerfile compilation command

docker build -f dockerfile -t zyj/tomcat .

3. Run Command

docker run -d -p 8080:8080 --name tomcat8
-v /opt/docker-tomcat/logs/:/opt/tomcat/logs/ -v /opt/docker-tomcat/webapps/:/opt/tomcat/webapps/ -v /opt/docker-tomcat/context.xml:/opt/tomcat/webapps/manager/META-INF/context.xml -v /opt/docker-tomcat/tomcat-users.xml:/opt/tomcat/conf/tomcat-users.xml --privileged=true zyj/tomcat

The above solution to the problem that docker run container automatically ends is all I have to share with you. I hope it can give you a reference. I also hope that you will support 123WORDPRESS.COM.