Git based application deployment patterns for Kubernetes

Shahidh talks about various patterns revolving around GitOps (Git + Devops) for applications deployment onto Kubernetes.

Transcript

1. Git based application
   deployment patterns for
   Kubernetes
   Git ❤ K8s
   

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2. Shahidh K
   Muhammed
   @shahidh_k
   

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3. Git
   ● Distributed version control system
   ● Manage source code
   ● Any text files can be tracked
   ● Collaboration
   

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4. Git - Source of Truth
   ● Infrastructure as Code
   ○ Terraform, CloudFormation
   ● System Configuration as Code
   ○ Ansible
   ○ Chef
   ○ Puppet
   ● Application Configuration as Code
   ○ Kubernetes
   ○ Hasura
   ● Application Source Code
   

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5. Declarative tools ❤ Git
   

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6. Ops
   ● Configure, build, test, deploy
   ● CI/CD
   ● Monitor, fix
   ● Upgrades
   ● Rollbacks
   ● Automation
   

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7. GitOps
   ● Ops practices using Git
   ● Use Git as source of truth
   ● Drive operations through git repo
   ● Get version control, history, peer review, and rollback
   ● Continuous delivery - Automated pipelines
   ● Webhooks: push to trigger build/test
   ● PRs & merge branch to deploy
   

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8. GitOps - Patterns
   ● CI builds artifacts
   ● Updates config (in a git repo)
   ● Trigger rollout (PR merge/commit)
   ● Observe
   ● Control
   

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9. GitOps - Patterns
   Source: Weave Works
   

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10. GitOps - Patterns
    ● Use declarative configuration to define
    application and services
    ● All changes go through git review process,
    none using kubectl
    ● Use an operator in the cluster to drive
    observed state to desired state, as declared
    by the configuration in git
    ● pre-push hook to create manifests
    ○ Render templates for correct env
    ○ Secrets
    ● pre-receive hook or webhooks to build
    artifacts and do kubectl set-image
    ● Power to developer
    ● Own tooling
    

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11. Shahidh K
    Muhammed
    @shahidh_k
    Thanks for listening! Questions?
    

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