How to correctly deploy web projects with docker

The specific steps are as follows:

(Recommended tutorial: docker tutorial)

1: Create a directory dock at will and be ready The following files:

2. Write Dockerfile, through which you can quickly build a docker image

vi  Dockerfile

Add the following configuration

FROM centos
MAINTAINER this is dock image <jsh>
ADD jdk1.8.0_191 /usr/local/java
ENV JAVA_HOME /usr/local/java
ENV JAVA_BIN /usr/local/java/bin
ENV JRE_HOME /usr/local/java/jre
ENV PATH $PATH:/usr/local/java/bin:/usr/local/java/jre/bin
ENV CLASSPATH /usr/local/java/jre/bin:/usr/local/java/lib:/usr/local/java/jre/lib/charsets.jar
ADD apache-tomcat-8.5.40 /usr/local/tomcat8
ENTRYPOINT ["/usr/local/tomcat8/bin/catalina.sh","run"]
ADD ./manager.war /usr/local/tomcat8/webapps
EXPOSE 8080

Explanation:

(1) FROM centos means to obtain the centos basic image from the docker official warehouse
(2) ADD jdk1.8.0_191 /usr/local/ will be in the current directory (same level as Dockerfile directory) to the /usr/local/ of the image
(3) ENV JAVA_HOME /usr/local/jdk1.8.0_191 Set Java environment variables
(4) EXPOSE 8080 The port exposed to the outside world for convenience External access
(5) CMD /usr/local/tomcat8/bin/catalina.sh run command is executed after the container is running. If there are multiple CMDs, only the last one is valid.

3. Build the image

Command:

docker build -t dock .

(space after dock.) Complete the automatic build

4. Run the container

Command:

docker run -d -p 8060:8080 dock

-d means running the container in the background and returns the container ID

-p Using port mapping, 8060:8080 means mapping the container's 8080 port to the host's 8060 port.

View all running containers

Command:

docker ps -all

5. Test deployment results IP:8060 If the tomcat page appears, it means the container was started successfully.

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