Continuous delivery/deployment with Kubernetes, Docker and Jenkins running on Google Cloud (Google Container Engine)

1. GOOGLE CLOUD - KUBERNETES -
DOCKER - CONTINUOUS
DEPLOYMENT - JENKINS - SPRING
BOOT - MAVEN - MICROSERVICES
JAMES HEGGS

2. SETTING THE SCENE…
ABOUT ME @EGGSY84
▸Software Developer - Bespoke software house
▸Software Developer - SaaS product based
▸Head of Operations - Config/Orchestration/Deploys etc
▸Co-Organiser DevOps Manchester Meetup
▸DevOps Consultant - GDS project
▸Head of Development - ResponseTap

3. SETTING THE SCENE…
THIS TALK
▸WILL:
▸Provide high level view of technologies
▸Share code examples and walkthroughs
▸WILL NOT:
▸Cover why you would do this
▸Whether you even should do this

4. OPERATIONS
INFRASTRUCTURE

5. OPERATIONS
GOOGLE CLOUD PLATFORM (GCP)
▸Utilises Google Container Engine (GKE)
▸(which is actually just Kubernetes)
▸Projects and Operations within them
▸Found GKE learning curve less steep than EC2 container
service

8. OPERATIONS
JENKINS MASTER
▸https://github.com/eggsy84/gcp-jenkins-master-k8s-seed
▸Built with Docker and available on public Docker hub
▸Utilises Jenkins pipeline plugin for pipelines as code
▸Utilises Jenkins Kubernetes (k8s) plugin for communication
with k8s API

9. OPERATIONS
JENKINS SLAVE
▸https://github.com/eggsy84/gcp-jenkins-slave-k8s-seed
▸Built with Docker and available on public Docker hub
▸Spun up as Docker containers by k8s plugin
▸Installs required build tools (maven, docker, gcloud tools)

10. OPERATIONS
BOOTSTRAP SCRIPT
▸https://github.com/eggsy84/gcp-bootstrap-infrastructure
▸Will create GKE cluster in specified zone, under specified
project with specified number of nodes called “cd-cluster”
▸Uses k8s YAML files to deploy jenkins master
sh deploy.sh {project_name} {zone} {machine-type} {number-of-nodes} {service-
account-file.json}
sh deploy.sh docker-meetup europe-west1-b n1-standard-2 1 ~/srvc-account.json

11. DEVELOPMENT
CODE AND PIPELINES

12. DEVELOPMENT
SPRING BOOT JAVA APP
▸https://github.com/eggsy84/gcp-spring-boot-app
▸Really simple maven based spring boot app
▸mvn spring-boot:run

13. DEVELOPMENT
JENKINSFILE
▸https://github.com/eggsy84/gcp-spring-boot-
app/blob/master/Jenkinsfile
▸Part of the source control for the application
▸Uses Jenkins pipeline DSL to define build stages
▸Node name relates to the node name defined in the k8s
plugin
▸Produces docker build tagged with build date time

14. DEVELOPMENT
JENKINSFILE
node('build-slave') {
// Project name will be passed in as a parameter
def project = "${GCP_PROJECT_NAME}"
def appName = 'spring-boot-app'
// BUILD_DATE_TIME defined as a build parameter in Jenkins
def imageTag = "eu.gcr.io/${project}/${appName}:${BUILD_DATE_TIME}"
// Code checkout stage
stage 'Checkout'
checkout scm
// Compile with maven stage
stage 'Compile'
sh "mvn clean compile”
. . .

15. DEVELOPMENT
K8S FILES
▸https://github.com/eggsy84/gcp-spring-boot-
app/tree/master/k8s/deployments
▸https://github.com/eggsy84/gcp-spring-boot-
app/tree/master/k8s/services
▸Executes kubernetes deployments and services for
presenting application externally

16. DEVELOPMENT
K8S DEPLOYMENT
kind: Deployment
apiVersion: extensions/v1beta1
metadata:
name: app-deployment
spec:
replicas: 1
template:
metadata:
name: spring-boot-app
labels:
name: spring-boot-app
spec:
containers:
- name: spring-boot-app
image: eu.gcr.io/GCP_PROJECT/APP_NAME:1.0.0
imagePullPolicy: Always
readinessProbe:
tcpSocket:
port: 8080
initialDelaySeconds: 10
timeoutSeconds: 5
ports:
- name: app-http
containerPort: 8080

17. DEVELOPMENT
K8S SERVICE
apiVersion: v1
kind: Service
metadata:
name: app-service
labels:
app: app-service
spec:
type: LoadBalancer
ports:
- port: 80
name: frontend-http
targetPort: 8080
protocol: TCP
selector:
name: spring-boot-app

18. DEMO TIME

19. PROMISES
COMING SOON…
▸As well as the open source code I will get round to putting a
blog together - promise :)
▸Slides will go up on slideshare
▸Code will get README’s and instructions

20. ANY
QUESTIONS?
THANK YOU FOR LISTENING

21. WRAP UP
USEFUL LINKS
▸https://github.com/search?q=user%3Aeggsy84+gcp
▸https://hub.docker.com/r/eggsy84/gcp-jenkins-slave-k8s-
seed/
▸https://hub.docker.com/r/eggsy84/gcp-jenkins-master-k8s-
seed/

22. WRAP UP
USEFUL LINKS
▸https://wiki.jenkins-
ci.org/display/JENKINS/Kubernetes+Plugin
▸https://jenkins.io/doc/pipeline/
▸https://wiki.jenkins-ci.org/display/JENKINS/Pipeline+Plugin
▸https://github.com/GoogleCloudPlatform/continuous-
deployment-on-kubernetes