Helm is a package manager for Kubernetes that allows deploying and managing Kubernetes applications. It provides features like managing complexity, easy deployment and rollback of releases. Helm uses charts which contain templates and configuration values to deploy applications on Kubernetes. Users can install, upgrade, and rollback releases using the Helm CLI client and Tiller server.

1. HELM
The package manager for
Kubernetes
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2. 2

3. What is HELM?
+ Package manager
+ Manage Complexity
+ Easy deploy/update/rollback
+ Many production-ready charts
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4. UI? https://kubeapps.com/
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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
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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
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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)
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8. template:
metadata: <...>
spec:
containers:
- image: {{ .Values.CI_REGISTRY_IMAGE }}:{{ .Values.CI_TAG }}
<...>
Template
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9. Example
helm install --set CI_TAG=1.6.0 my-chart
helm upgrade --install --wait my-chart
helm ls
helm rollback
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10. CI flow
+ New tag
+ NEW Push release chart (push to tiller server)
+ Build
+ Test
+ UPDATE Deploy. Use HELM
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11. REAL SAMPLE
1. Write NodeJS-server
2. Add Dockerfile
3. Build docker image
4. Add Helm
5. Deploy service
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