Rancher QA pre-configured Jenkins backed by code (JCasC)

• Custom Jenkins image with plugins pre-installed (Chart: 5.15, Jenkins: 2.440.2-jdk)
• One configmap and secret backing the installation
• Docker-in-Docker agent w/ jenkins-job-builder installed
• Credentials automatically loaded from AWS Secrets Manager (see secrets)
• Admin token automatically configured (see secrets)
• Build Jenkins Jobs pre-configured
• THERE IS NO PERSISTENCE - ANYTHING NOT BACKED IN THE CONFIGMAP, SECRETS, IMAGES, JENKINS JOB BUILDER WILL NOT COME BACK IF JENKINS RELOADS

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To deploy:

• Build and push jenkins and dind-agent images
• Create namespace jenkins
• Adjust secrets in resources.yaml
  • ADMIN-TOKEN must be 32 characters (ex: 114d13730ad0d9294e4b424bf8d873c26d)
  • AWS-SM-ACCESSKEY & AWS-SM-SECRETKEY must belong to a user with Read privileges to AWS Secrets Manager
• Deploy resources.yaml to your cluster in jenkins namespace
• Add helm repo - https://charts.jenkins.io
• Deploy Jenkins chart to cluster with values.yaml - config assumes deployment name is jenkins-qa
• Deploy ingress.yaml after updating the host (JENKINS_URL with no protocol)
• Update Route 53 A record (JENKINS_URL) with the LB IPs from the ingress (k get ingress -n jenkins)
• Go to JENKINS_URL
• Login with admin credentials (set in secret)
• Run Build Jenkins Jobs job

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Some credentials in AWSSM are assumed to exist:

• ADMIN_USER (string - default user; must match secret)
• JENKINS_TOKEN (string - token set for default user; must match secret)
• JENKINS_URL (string - Jenkins URL)
• jenkins-job-builder-github (SSH Private Key with Username, with access to JJB_REPO)

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Fun Things

Configure a job (or multiple) with a Generic Webhook Trigger and trigger with curl:

curl --user admin:114d13730ad0d9294e4b424bf8d873c26d -X POST -L -H "Content-Type: application/json" "http://JENKINS_URL/generic-webhook-trigger/invoke?token=newtag" -d '{"job": "podtest"}'

Easily create an AWS Secret Manager secret

• https://plugins.jenkins.io/aws-secrets-manager-credentials-provider/

aws secretsmanager create-secret --name JENKINS_TOKEN --secret-string '114d13730ad0d9294e4b424bf8d873c26d' --tags 'Key=jenkins:credentials:type,Value=string' --description 'Jenkins API Token'

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TODO: Update resource limits and concurrency for k8s agents