How to create new docker container and run it from Jenkinsfile - docker

Question

I've inherited this Jenkinsfile stage that will run a new docker image using withRun:
stage('Deploy') {
steps {
script {
docker.image('deployscript:latest').withRun("""\
-e 'IMAGE=${IMAGE_NAME}:${BUILD_ID}' \
-e 'CNAME=${IMAGE_NAME}' \
-e 'PORT=${PORT_1}:80' \
-e 'PORT=${PORT_2}:443'""") { c ->
sh "docker logs ${c.id}"
}
}
}
}
However, I believe this method is only meant for testing purposes and actually stops the container once the block is finished. I want this step to actually run the container and stop/restart the previous one if necessary. The documentation out there on this is surprisingly sparse. Please help.

Answer 1

If you want to run the docker container throughout all the stages, thenthe example would look like below:
Scripted Pipeline
node('master') {
/* Requires the Docker Pipeline plugin to be installed */
docker.image('alpine:latest').inside {
stage('01') {
sh 'echo STAGE01'
}
stage('02') {
sh 'echo STAGE02'
}
}
}
Declarative Pipeline
pipeline {
agent {
docker {
image 'alpine:latest'
label 'master'
args '-v /tmp:/tmp'
}
}
stages {
stage('01') {
steps {
sh "echo STAGE01"
}
}
stage('02') {
steps {
sh "echo STAGE02"
}
}
}
}
In both scripted and declarative pipelines, The docker container from the alpine image will active for all the stages to finish and only delete if the stage is a success or failure.
But If you would want to control start, stop, restart the container yourself on different stages, you can do it with bash command or by writing a small groovy script wrapping the docker command like below
node {
stage('init') {
docker create --name myImage1 -v $(pwd):/var/jenkins -w /var/jenkins imageName:tag
}
stage('build') {
// make use of docker command to start, stop and execute some script inside the container
// same goes for other stage
//once all done you can remove the container
docker rm myImage1
}
}

Answer 2

The following will stop the existing container and run a new one with the new image:
stage('Deploy') {
steps {
sh "docker stop ${IMAGE_NAME} || true && docker rm ${IMAGE_NAME} || true"
sh "docker run -d \
--name ${IMAGE_NAME} \
--publish ${PORT}:443 \
${IMAGE_NAME}:${BUILD_ID}"
}
}