Helm and ArgoCD: Like peanut butter and chocolate

GitOps Guide to the Galaxy: Working with Helm

YouTube: https://youtu.be/1FzOlSed5ts

Transcript

1. Helm and ArgoCD
   Like peanutbutter and chocolate.
   GitOps Guide to the Galaxy
   1
   Christian Hernandez
   Cloud Platforms BU
   

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2. 2
   Helm is a package manager for Kubernetes
   applications
   define, install and update applications
   

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3. 3
   a package consisting of
   related Kubernetes YAML
   files
   a place where Charts can be
   stored, shared and distributed
   a specific instance of a Chart
   deployed on Kubernetes
   Chart Repository Release
   

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4. 4
   How does Helm work?
   OPENSHIFT
   NAMESPACE
   Image
   Repository
   Releases
   Helm Chart
   (templates)
   Values
   (configs)
   Helm CLI
   

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5. Helm Templates
   apiVersion: build.openshift.io/v1
   kind: BuildConfig
   . . .
   spec:
   . . .
   source:
   type: Git
   git:
   uri: {{ .Values.build.uri }}
   contextDir: {{ .Values.build.contextDir }}
   {{- if and .Values.build.native.useDefaultDockerfile (eq
   .Values.build.mode “native”) }}
   dockerfile: |-
   FROM
   registry.redhat.com/quarkus/mandrel-20-rhel8 AS
   builder
   . . .
   {{- end }}
   strategy:
   {{- if eq .Values.build.mode “jvm” }}
   type: Source
   sourceStrategy:
   . . .
   apiVersion: apps/v1
   kind: Deployment
   metadata:
   . . .
   spec:
   replicas: {{ .Values.deploy.replicas }}
   . . .
   template:
   spec:
   containers:
   - name: web
   image: {{ .Release.Name }}:{{ .Values.image.tag }}
   {{- if .Values.deploy.resources }}
   resources:
   {{- toYaml .Values.deploy.resources | nindent 12 }}
   {{- end }}
   . . .
   

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6. Configuration using “Values”
   build:
   uri: https://github.com/deweya/quarkus-quickstarts
   contextDir: getting-started
   mode: jvm
   deploy:
   resources:
   limits:
   cpu: 500m
   memory: 2Gi
   Create a values.yaml file
   $ helm install quarkus-app
   redhat-charts/quarkus --values
   values.yaml
   Install the Helm chart
   BuildConfig
   ImageStream
   

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7. Helm Integration with ArgoCD
   ● Charts can be sourced from:
   ○ Git Repositories
   ○ Helm Repositories
   ● Override Chart Values
   ○ Separate Values files
   ○ Individual parameters
   ● Managed via UI or CLI
   ● Values.yaml file can only be
   stored if you’re hosting your own
   helm repo
   

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8. Let’s Explore!
   Hacking away at it until it works.
   GitOps Guide to the Galaxy
   8
   Keyboard time!
   

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