ECS Jenkins Plugin to create ephemeral Jenkins Nodes in Fargate

About Jenkins:

I will assume it is in a EC2.

You can install it form ansible-galaxy, Helm,… good to do like this because you can easily install Jenkins plugins in the future without hardcoding it through web interface.

Jenkins will have communication with ECS tasks, for example: be in same VPC and same subnet.

Create a Git token so that Jenkins pipeline can checkout the repo in the Node.

Mange Jenkins →Nodes administration →Configure clouds:

Jenkins Pipeline:

Jenkinsfile that we will use in the pipeline:

IAM ecsTaskExecutionRole will have in addition, permissions to read from ECR.

taskrole param is for accessing to ECR.

executionRole parameter is for when the taks is already running.

About the Dockerfile , you can integrate the JNLP (Jenkins node software) into your own image, I have done with Python like this:

FROM jenkins/jnlp-node:alpine as jnlp

FROM python:alpine

RUN apk -U add openjdk8-jre

COPY — from=jnlp /usr/local/bin/jenkins-agent /usr/local/bin/jenkins-agent
COPY — from=jnlp /usr/share/jenkins/agent.jar /usr/share/jenkins/agent.jar

ENTRYPOINT [“/usr/local/bin/jenkins-agent”]

You will also need to have a ECS Cluster, Fargate type, with name “jenkins-node-ecs”, same than in Jenkinsfile.

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