Best Practices for Using Developer Tooling to Drive Operations with GitOps

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@errordeveloper Developer Tooling to Drive Operations with GitOps

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outline: –define GitOps –example –dev toolkit

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– define GitOps

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Kubernetes managed through git

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not just config as code

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3 promisses of GitOps

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declarative

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deterministic

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extendable

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GitOps vs CIOps

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* Running tests √ Tests OK * Building container image # docker build -t $APP:$REV # docker push $APP:$REV * Deploying to Kubernetes # kubectl set image deployment/$APP $APP=$APP:$REV * Build finished √ “CIOps”

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concerns with “CIOps”

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are CI jobs interlocked?

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CI job per cluster?

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for a new cluster, re-run CI…

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in-cluster CI?

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…and how to do a rollback?

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“CIOps” pipeline

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– example

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– using skaffold

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– local setup # skaffold.yaml apiVersion: skaffold/v1alpha2 kind: Config build: artifacts: - imageName: podinfo docker: dockerfilePath: ./Dockerfile.ci deploy: kubectl: { manifests: [ deploy/skaffold/dev/* ] }

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– local setup $ skaffold dev

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– using skaffold with CI & Weave Cloud

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– CI setup # skaffold.yaml

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– CI setup # skaffold.yaml apiVersion: skaffold/v1alpha2 kind: Config build: {} # deploy: {} # profiles: - name: test #   - name: production #

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– CI setup # skaffold.yaml (continued) - name: test ## This profile runs unit tests and builds the image build: local: { skipPush: true } artifacts: - imageName: stefanprodan/podinfo docker: dockerfilePath: ./Dockerfile.ci deploy: {} # no-op

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– CI setup # skaffold.yaml (continued) - name: production ## This profile pushes the image build: local: { skipPush: false } artifacts: - imageName: stefanprodan/podinfo docker: dockerfilePath: ./Dockerfile.ci deploy: {} # no-op

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– CI setup # .circleci/config.yml

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– CI setup # .circleci/config.yml version: 2 jobs: test: {} # deploy: {} # workflows: main: jobs: - test - deploy: requires: [test] filters: { branches: {only: [master]} }

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– CI setup # .circleci/config.yml (continued) test: docker: - image: errordeveloper/skaffold:66cc263e  steps: - checkout - setup_remote_docker: {docker_layer_caching: true} - run: command: skaffold build --profile=test

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– CI setup # .circleci/config.yml (continued) deploy: docker: - image: errordeveloper/skaffold:66cc263e  steps: - checkout - setup_remote_docker: {docker_layer_caching: true} - run: command: | scripts/docker_login.sh skaffold build —profile=production

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– Weaveworks GitOps operator

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URL: [email protected]:stefanprodan/podinfo path: deploy/skaffold/production branch: master

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– Using Weave Flux (open-source) apiVersion: apps/v1 kind: Deployment spec.template.spec.containers: - name: flux image: quay.io/weaveworks/flux:1.4.0 args: - [email protected]:stefanprodan/podinfo - --git-path=deploy/skaffold/production - --git-branch=master