${docGenStepName}

${docGenDescription}

Prerequisites

The Jenkins should be running on kubernetes.
An environment variable ON_K8S should be created on Jenkins and initialized to true. This could for example be done via Jenkins - Manage Jenkins - Configure System - Global properties - Environment variables

${docGenParameters}

${docGenConfiguration}

${docDependencies}

Side effects

none

Exceptions

none

Example 1: Run a closure in a single container pod

# set environment variable
export ON_K8S=true"

dockerExecuteOnKubernetes(script: script, dockerImage: 'maven:3.5-jdk-7'){
    sh "mvn clean install"
}

In the above example, a pod will be created with a docker container of image maven:3.5-jdk-7. The closure will be then executed inside the container.

Example 2: Run a closure in a multi-container pod

# set environment variable
export ON_K8S=true"

dockerExecuteOnKubernetes(script: script, containerMap: ['maven:3.5-jdk-8-alpine': 'maven', 's4sdk/docker-cf-cli': 'cfcli']){
    container('maven'){
        sh "mvn clean install"
    }
    container('cfcli'){
        sh "cf plugins"
    }
}

In the above example, a pod will be created with multiple Docker containers that are passed as a containerMap. The containers can be chosen for executing by referring their labels as shown in the example.

Example 3: Running a closure in a dedicated container of a multi-container pod

# set environment variable
export ON_K8S=true"

dockerExecuteOnKubernetes(
  script: script,
  containerCommands: ['selenium/standalone-chrome': ''],
  containerMap: ['maven:3.5-jdk-8-alpine': 'maven', 'selenium/standalone-chrome': 'selenium'],
  containerName: 'maven',
  containerPortMappings: ['selenium/standalone-chrome': [containerPort: 4444, hostPort: 4444]]
  containerWorkspaces: ['selenium/standalone-chrome': '']
){
  echo "Executing inside a Kubernetes Pod inside 'maven' container to run Selenium tests"
  sh "mvn clean install"
}

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