1.
Kubernetes CI/CD with Helm:
Checking in your deployment configuration as code
Adnan Abdulhussein - @prydonius
Software Engineer, Bitnami

2.
Agenda
Benefits of configuration/infrastructure as code
Managing Kubernetes deployments
Introduction to Helm
Demo CI/CD pipeline with Helm

3.
Configuration and Infrastructure
as Code
Host Management CI/CD InfrastructurePackaging

4.
Configuration and Infrastructure
as Code
Why?
Version Control
Consistent
Reproducible
Rollbacks
Auditing

5.
Tools
Source Code
Management
CI/CD Platform Deployment Tool
Orchestration
Platform

6.
Kubernetes Resource Definitions
MariaDB
Service
resource
Database tier
Secret
resource
Deployment
resource
Application
Service
resource
Backend tier
Config Map
resource
Deployment
resource
Nginx
Service
resource
Frontend tier
Deployment
resource

7.
Example: Kubernetes Resource
apiVersion: v1
kind: Deployment
metadata:
name: my-app
spec:
replicas: 3
template:
metadata:
labels:
app: my-app
spec:
containers:
- name: my-app
image: prydonius/node-todo:v1.0.0
ports:
- containerPort: 8080
livenessProbe:
httpGet:
path: /
port: 8080
initialDelaySeconds: 120
timeoutSeconds: 5

8.
Example: Deploying to Kubernetes
$ kubectl apply -f ./mariadb-secret.yaml
secret "mariadb" configured
$ kubectl apply -f ./mariadb-deployment.yaml
deployment "mariadb" configured
$ kubectl apply -f ./mariadb-service.yaml
service "mariadb" configured
$ kubectl apply -f ./application-configmap.yaml
configmap "application" configured
$ kubectl apply -f ./application-deployment.yaml
deployment "application" configured
$ kubectl apply -f ./application-service.yaml
service "application" configured
$ kubectl apply -f ./nginx-deployment.yaml
deployment "nginx" configured
$ kubectl apply -f ./nginx-service.yaml
service "nginx" configured

9.
Managing raw
manifests can be
difficult
No template parameterization
No application lifecycle hooks
No history of releases

10.
Tool for managing
resources as a
single unit
Reuse resources
Logically group app resources
Manage app lifecycles

11.
Charts
(packages)
Application definitions
Consist of
Metadata (Chart.yaml)
Kubernetes templates
Configuration file (values.yaml)
Documentation
Can depend on other charts

12.
Navigating a Chart
MariaDB
Service
resource
Database tier
Secret
resource
Deployment
resource
Application
Service
resource
Backend tier
Config Map
resource
Deployment
resource
Nginx
Service
resource
Frontend tier
Deployment
resourceDocumentation
Metadata
Config File
helm install my-app

13.
myapp
├── Chart.yaml
├── README.md
├── charts
│ └── mariadb-0.5.8.tgz
├── templates
│ ├── deployment.yaml
│ └── ...
└── values.yaml
Navigating a Chart

14.
Public charts repository

15.
CLI tool
Takes a local Chart path
Set parameters used in Chart templates
Release state stored in cluster
How the Helm can I setup CD?

16.
Generic CI/CD pipeline
Code/config change
Build
Test
Publish artifacts
Staging/QA Deployment
Production Deployment
Manual verification

17.
Demo: CI/CD Pipeline
Code/config change
Build
Test
Push Docker image
Staging/QA Deployment
Production Deployment
Manual verification

18.
Demo: Todo List App
Application Code
Dockerfile
Jenkinsfile
Helm Chart
prydonius/node-todo
Amazing Todo App
● Express.js server
● Angular frontend
● MongoDB database

19.
Demo

20.
Helm + Jenkins vs. Spinnaker
Helm and Jenkins
+ config as code, single source of truth
+ multi-branch support (including pull requests)
+ rich source of plugins
+ single platform for CI and CD
Spinnaker
- more deployment strategies

21.
Helm Community
Over 100 contributors
1.5 years old
Slack channel: Kubernetes/#Helm
Public dev meetings: Thursdays @ 9:30 pacific
Weekly updates & demos at SIG-Apps meetings: Mondays @ 9am pacific
Join
us!

22.
Thank youTime for questions and (hopefully) answers...