Helm

1. 1

   What Is Helm

   Welcome. This course assumes you have already met Kubernetes in our Kubernetes course (or somewhere else). If words like Deployment, Service, and...

   Package manager for KubernetesChartReleaseRepositoryHelm vs Kustomize vs raw manifestsWhen Helm is overkill
   20 min
2. 2

   Installing Charts

   Most of the time you reach for Helm, you are not writing a chart. You are installing someone else's. Bitnami's PostgreSQL, ingress-nginx,...

   Helm repo addHelm repo updateHelm searchHelm installHelm listHelm uninstall+1
   30 min
3. 3

   Chart Structure

   You have installed someone else's chart and watched Helm turn it into running Pods. That still leaves an obvious question: what is actually inside...

   Helm createChart.yamlValues.yamlTemplates/ folder_helpers.tplCharts/ subcharts directory+2
   30 min
4. 4

   Values and Templating

   Look at templates/deployment.yaml in your scaffolded chart and you will notice it is not quite a Kubernetes manifest. It has the right shape,...

   .Values.Release.Chart--set--values file.yamlSprig default+3
   35 min
5. 5

   Helpers and Named Templates

   Open a chart with more than one or two manifests and a pattern jumps out immediately: the same handful of lines show up in every file. The Deployment...

   _helpers.tplDefineTemplateIncludeCommon name patternCommon labels pattern+1
   30 min
6. 6

   Dependencies and Subcharts

   Almost nothing you deploy actually stands alone. A web service usually wants a cache sitting next to it. A worker wants a queue. An API wants a...

   Dependencies in Chart.yamlHelm dependency updateCharts/ folderPassing values into subchartsConditionTags+1
   30 min
7. 7

   Release Management

   Installing a chart the first time is the easy part. The real work starts afterward: a new image ships, a config value needs to change, someone bumps...

   Helm upgradeHelm rollbackHelm history--atomic--wait--timeout+2
   30 min
8. 8

   Hooks and Tests

   Some work does not fit neatly into "render a manifest and apply it." A database schema needs to be migrated before the new application pods start...

   Helm.sh/hook annotationPre-installPost-installPre-upgradeHook-delete-policyHelm test+2
   30 min
9. 9

   Publishing Charts

   Your chart works. You can run helm install myapp ./mychart and get a running application, which means the hard part is behind you. Now a colleague...

   Helm packageChart museum (HTTP repo)OCI registriesHelm push oci://Helm pullSemVer for charts+1
   30 min
10. 10

    Capstone: Your Own Chart

    Every lesson so far handed you a chart and asked you to change one thing in it. That teaches the syntax and hides the hard part, which is design. A...

    Two-service chartDeployment templateService templateConfigMap templateIngress templateNOTES.txt+3
    60 min

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