π Kubernetes GitOps and CI/CD
Kubernetes GitOps and CI/CD Implementation
Learn how to implement GitOps practices and establish robust CI/CD pipelines for your Kubernetes clusters using modern tools and techniques.
What Weβll Cover
- GitOps Principles and Tools
- ArgoCD Implementation
- Flux CD Setup
- CI/CD Pipeline Integration
- Progressive Delivery Patterns
Prerequisites
- Kubernetes cluster
- Git repository access
- Basic CI/CD knowledge
- Helm fundamentals
Setting Up ArgoCD
First, letβs install ArgoCD:
kubectl create namespace argocd
kubectl apply -n argocd -f https://raw.githubusercontent.com/argoproj/argo-cd/stable/manifests/install.yaml
ArgoCD Application Configuration
apiVersion: argoproj.io/v1alpha1
kind: Application
metadata:
name: myapp
namespace: argocd
spec:
project: default
source:
repoURL: https://github.com/org/app.git
targetRevision: HEAD
path: k8s
destination:
server: https://kubernetes.default.svc
namespace: myapp
syncPolicy:
automated:
prune: true
selfHeal: true
Implementing Flux CD
Installing Flux:
# Install Flux CLI
brew install fluxcd/tap/flux
# Bootstrap Flux
flux bootstrap github \
--owner=my-github-username \
--repository=my-cluster-config \
--branch=main \
--path=clusters/my-cluster \
--personal
Flux Kustomization Example
apiVersion: kustomize.toolkit.fluxcd.io/v1beta2
kind: Kustomization
metadata:
name: apps
namespace: flux-system
spec:
interval: 10m0s
path: ./apps
prune: true
sourceRef:
kind: GitRepository
name: flux-system
CI Pipeline with GitHub Actions
name: CI
on:
push:
branches: [ main ]
pull_request:
branches: [ main ]
jobs:
build:
runs-on: ubuntu-latest
steps:
- uses: actions/checkout@v2
- name: Build and Test
run: |
make test
make build
- name: Build and Push Docker image
uses: docker/build-push-action@v2
with:
push: true
tags: myorg/myapp:$
Progressive Delivery with Argo Rollouts
apiVersion: argoproj.io/v1alpha1
kind: Rollout
metadata:
name: myapp-rollout
spec:
replicas: 5
strategy:
canary:
steps:
- setWeight: 20
- pause: {duration: 1h}
- setWeight: 40
- pause: {duration: 1h}
- setWeight: 60
- pause: {duration: 1h}
- setWeight: 80
- pause: {duration: 1h}
revisionHistoryLimit: 2
selector:
matchLabels:
app: myapp
template:
metadata:
labels:
app: myapp
spec:
containers:
- name: myapp
image: myorg/myapp:latest
GitOps Best Practices
- Repository Structure:
βββ base/ β βββ deployment.yaml β βββ service.yaml β βββ kustomization.yaml βββ overlays/ β βββ production/ β β βββ kustomization.yaml β β βββ patch.yaml β βββ staging/ β βββ kustomization.yaml β βββ patch.yaml
- Environment Management:
- Use separate branches or directories
- Implement environment-specific configurations
- Maintain promotion strategy
- Security Considerations:
- Implement RBAC
- Use sealed secrets
- Regular security scanning
Video Resources
GitOps Fundamentals
- GitOps with ArgoCD by Viktor Farcic
- Flux CD Tutorial by TechWorld with Nana
CI/CD Implementation
- Kubernetes CI/CD with GitHub Actions by DevOps Toolkit
- ArgoCD Tutorial for Beginners by DevOps Journey
Advanced Patterns
- Progressive Delivery with Argo Rollouts by CNCF
- GitOps at Scale by Weaveworks
Additional Resources
Written on August 13, 2025