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Docker Compose is a Docker tool for defining and running complex applications. Using Docker Compose no longer requires the use of shell scripts to start the container. (configured via docker-compose.yml)

Installation of Docker Compose

Github source

Sudo curl-L https://github.com/docker/compose/releases/download/1.22.0/docker-compose-`uname-s`-`uname-m`-o / usr/local/bin/docker-compose# add executable permissions to docker-compose sudo chmod + x / usr/local/bin/docker-compose

Daocloud source

Curl-L https://get.daocloud.io/docker/compose/releases/download/1.22.0/docker-compose-`uname-s`-`uname-m` > / usr/local/bin/docker-compose# add executable permissions to docker-compose sudo chmod + x / usr/local/bin/docker-compose

Uninstall Docker Compose

Sudo rm / usr/local/bin/docker-compose

View the version of Docker Compose

Docker-compose-version

Configure Dockerfile

# specify the basic image and customize the FROM java:8# maintainer information MAINTAINER zhouzhaodong # set the working directory WORKDIR / apps/demo# to add demo-0.0.1-SNAPSHOT.jar to the container ADD demo-0.0.1-SNAPSHOT.jar demo-1.0.0.jar#bash execution, so that demo-1.0.0.jar can access # RUN to create a new layer, execute these commands on it, and modify the commit layer after execution To form a new mirror image. RUN bash-c "touch / demo-1.0.0.jar" # states that the runtime container provides a service port, which is just a declaration, and the service EXPOSE 808 will not open this port at run time because of this declaration. EXPOSE 808 specifies the container launcher and parameters "" ENTRYPOINT ["java", "- jar", "demo-1.0.0.jar"]

Configure the docker-compose.yml file

# version version: '3.0'services: demo: # build is used to specify the file path where the Dockerfile is located. Build:. # Mapping port ports:-"8080 Dockerfile" volumes: # specify a file directory to store container data. # $PWD indicates the current path-$PWD/data:/var/lib/log

Common commands of docker-compose

Build: # build image docker-compose build without cache-- no-cache;up: # build and launch container docker-compose up-ddown: # delete all containers, image docker-compose downrestart: # restart container docker-compose build; docker-compose down; docker-compose up-d

Run the docker-compose command to build and run the image

First of all, create a new folder in the host to store the Dockerfile,docker-compose.yml we created earlier and the jar package we packed. First go to this directory and run the down command to delete all previously created images. Run the build command to generate an image. Run the up command to start the container. Visit the ip+ port number and you can see our program.

The above is the whole content of this article, I hope it will be helpful to your study, and I also hope that you will support it.

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