Helm
- 1. HELM The package manager for Kubernetes 1
- 2. 2
- 3. What is HELM? + Package manager + Manage Complexity + Easy deploy/update/rollback + Many production-ready charts 3
- 5. HELM terminology + HELM - CLI client + Tiller - manages releases (installations) of your charts. + Chart - Description of the service and its dependencies + Release - installations + Repository - collection of released charts 5
- 6. How use HELM? wordpress/ Chart.yaml # A YAML file containing information about the chart README.md # A human-readable README file requirements.yaml # A YAML file listing dependencies for the chart values.yaml # The default configuration values for this chart charts/ # A directory containing any charts upon which this chart depends. templates/ # A directory of templates that, when combined with values, # will generate valid Kubernetes manifest files. templates/NOTES.txt # A plain text file containing short usage notes 6
- 7. Chart name: The name of the chart (required) version: A SemVer 2 version (required) description: A single-sentence description of this project (optional) engine: gotpl # The name of the template engine (optional, defaults to gotpl) 7
- 8. template: metadata: <...> spec: containers: - image: {{ .Values.CI_REGISTRY_IMAGE }}:{{ .Values.CI_TAG }} <...> Template 8
- 9. Example helm install --set CI_TAG=1.6.0 my-chart helm upgrade --install --wait my-chart helm ls helm rollback 9
- 10. CI flow + New tag + NEW Push release chart (push to tiller server) + Build + Test + UPDATE Deploy. Use HELM 10
- 11. REAL SAMPLE 1. Write NodeJS-server 2. Add Dockerfile 3. Build docker image 4. Add Helm 5. Deploy service 11