poprygun/docker-run

Java docker scripts

Maven over docker commands

Usefull when java and maven are not installed locally on developer's machine.

All application files will be generated in docker image and mapped to my-app local directory.

docker run -it --rm -v "$PWD":app -w app maven:3.5-jdk-8 mvn archetype-generate\
  -DgroupId=io.microsamples.docker\
  -DartifactId=docker-run\
  -DarchetypeArtifactId=maven-archetype-quickstart \
  -DinteractiveMode=false

cd my-app

docker run -it --rm -v "$PWD":app -w app maven:3.5-jdk-8 mvn package

docker run -it --rm -v "$PWD":app -w app maven:3.5-jdk-8 java -cp target/my-app-1.0-SNAPSHOT.jar io.microsamples.docker.App

Multistage build with attached Dockerfile

docker build --build-arg url=https://github.com/poprygun/echo.git\
  --build-arg project=echo\
  --build-arg artifactid=echo\
  --build-arg version=0.0.1-SNAPSHOT\
  -t poprygun/echo - < Dockerfile

docker run -it -p8080:8080 poprygun/echo

docker tag poprygun/echo host.pcfdev.io:5000/echo

<!-- for new version of PCF Dev -->
docker tag poprygun/echo host.cfdev.sh:5000/echo

Create local docker registry

* Note, for new version of PCF Dev, use host.cfdev.sh instead of host.pcfdev.io

docker run -d -p 5000:5000 --restart=always --name registry registry:2

Push image to local registry

docker push host.pcfdev.io:5000/echo

Verify image was pushed

http http://localhost:5000/v2/_catalog
HTTP/1.1 200 OK
Content-Length: 26
Content-Type: application/json; charset=utf-8
Date: Fri, 07 Sep 2018 15:29:05 GMT
Docker-Distribution-Api-Version: registry/2.0
X-Content-Type-Options: nosniff

{
    "repositories": [
        "echo"
    ]
}

Make sure PCF Dev is started specifying local docker registry

cf dev start -r host.pcfdev.io:5000

Push application from local docker registry to PCF Dev

cf push echo --docker-image host.pcfdev.io:5000/echo -m 512M

Cleanup when done

docker container stop registry
cf dev stop
cf dev destroy