kubernetes

a modern way to design an infrastructure

K8s features

• Automated Scheduling
• Self-Healing Capabilities
• Automated rollouts & rollback
• Offers enterprise-ready feature
• Auto-scalable infrastructure
• You can create predictable infrastructure
• Horizontal Scaling & Load Balancing
• Zero Downtime

source

GitOps Essentials

• The entire system described declaratively
• The canonical desired system state versioned in Git
• Approved changes that can be automatically applied to the system
• Software agents to ensure correctness and alert on divergence

source

SemVer approach

• MAJOR version when you make incompatible API changes,
• MINOR version when you add functionality in a backwards compatible manner, and
• PATCH version when you make backwards compatible bug fixes.

source

Standard Commit messages

Code Snapshots with TAGs

CI workflow

Push Code => Test code => Build conatiner => Tag with Commit ID => push to registry => update container version on Git

Merge Code => Release => Build container => Tag with SemVer => push to registry => update container version on Git.     

CD workflow

Gitlab webhook informs Argocd about the changes => Argocd sync and deploy manifests to the cluster

Sample app 

Loadbalancer External IP

Routing requests

Container name (inside the cluster) + (internal loadbalacer)

Replicated containers

Global overview