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Migrate helm chart from archived helm charts repo. (#241)
* Migrate helm chart from archived helm charts repo. Add github action which generates helm chart releases. Signed-off-by: Adam Hamsik <adam.hamsik@lablabs.io> * Add helm chart repository documentation Signed-off-by: Adam Hamsik <adam.hamsik@lablabs.io>
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‎.github/workflows/lint-test.yaml‎

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name: Lint and Test Charts
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on: pull_request
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jobs:
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lint-test:
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runs-on: ubuntu-latest
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steps:
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- name: Checkout
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uses: actions/checkout@v2
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with:
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fetch-depth: 0
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- name: Run chart-testing (lint)
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id: lint
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uses: helm/chart-testing-action@v1.1.0
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with:
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command: lint
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config: ct.yaml
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- name: Create kind cluster
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uses: helm/kind-action@v1.0.0
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if: steps.lint.outputs.changed == 'true'
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- name: Run chart-testing (install)
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uses: helm/chart-testing-action@v1.1.0
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with:
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command: install
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config: ct.yaml

‎.github/workflows/release.yaml‎

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name: Release Charts
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on:
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push:
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branches:
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- master
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jobs:
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release:
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runs-on: ubuntu-latest
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steps:
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- name: Checkout
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uses: actions/checkout@v2
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with:
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fetch-depth: 0
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- name: Configure Git
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run: |
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git config user.name "$GITHUB_ACTOR"
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git config user.email "$GITHUB_ACTOR@users.noreply.github.com"
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- name: Install Helm
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run: |
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curl -fsSLo get_helm.sh https://raw.githubusercontent.com/helm/helm/master/scripts/get-helm-3
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chmod 700 get_helm.sh
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./get_helm.sh
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- name: Add dependency chart repos
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run: |
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helm repo add stable https://charts.helm.sh/stable
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helm repo add incubator https://charts.helm.sh/incubator
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- name: Run chart-releaser
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uses: helm/chart-releaser-action@v1.0.0
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# with:
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# charts_dir: kubernetes/charts/coredns
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env:
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CR_TOKEN: "${{ secrets.GITHUB_TOKEN }}"

‎README.md‎

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This installs the coredns binary in /usr/bin, adds a coredns user (homedir set to /var/lib/coredns)
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and a small Corefile /etc/coredns.
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# Kuebernetes
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## Helm Chart
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This repository provides helm chart repo.
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```
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helm repo add coredns https://coredns.github.io/deployment/
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helm install coredns/coredns
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```

‎charts/coredns/.helmignore‎

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# Patterns to ignore when building packages.
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# This supports shell glob matching, relative path matching, and
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# negation (prefixed with !). Only one pattern per line.
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.DS_Store
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# Common VCS dirs
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.git/
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.gitignore
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.bzr/
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.bzrignore
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.hg/
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.hgignore
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.svn/
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# Common backup files
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*.swp
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*.bak
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*.tmp
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*~
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# Various IDEs
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.project
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.idea/
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*.tmproj
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OWNERS

‎charts/coredns/Chart.yaml‎

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apiVersion: v2
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name: coredns
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version: 1.14.0
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appVersion: 1.8.0
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home: https://coredns.io
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icon: https://coredns.io/images/CoreDNS_Colour_Horizontal.png
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description: CoreDNS is a DNS server that chains plugins and provides Kubernetes DNS Services
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keywords:
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- coredns
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- dns
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- kubedns
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sources:
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- https://github.com/coredns/coredns
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maintainers:
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- name: haad
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engine: gotpl
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type: application
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annotations:
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artifacthub.io/changes: |
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- Initial helm chart changelog

‎charts/coredns/README.md‎

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‎charts/coredns/templates/NOTES.txt‎

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{{- if .Values.isClusterService }}
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CoreDNS is now running in the cluster as a cluster-service.
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{{- else }}
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CoreDNS is now running in the cluster.
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It can be accessed using the below endpoint
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{{- if contains "NodePort" .Values.serviceType }}
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export NODE_PORT=$(kubectl get --namespace {{ .Release.Namespace }} -o jsonpath="{.spec.ports[0].nodePort}" services {{ template "coredns.fullname" . }})
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export NODE_IP=$(kubectl get nodes --namespace {{ .Release.Namespace }} -o jsonpath="{.items[0].status.addresses[0].address}")
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echo "$NODE_IP:$NODE_PORT"
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{{- else if contains "LoadBalancer" .Values.serviceType }}
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NOTE: It may take a few minutes for the LoadBalancer IP to be available.
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You can watch the status by running 'kubectl get svc -w {{ template "coredns.fullname" . }}'
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export SERVICE_IP=$(kubectl get svc --namespace {{ .Release.Namespace }} {{ template "coredns.fullname" . }} -o jsonpath='{.status.loadBalancer.ingress[0].ip}')
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echo $SERVICE_IP
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{{- else if contains "ClusterIP" .Values.serviceType }}
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"{{ template "coredns.fullname" . }}.{{ .Release.Namespace }}.svc.cluster.local"
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from within the cluster
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{{- end }}
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{{- end }}
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It can be tested with the following:
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1. Launch a Pod with DNS tools:
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kubectl run -it --rm --restart=Never --image=infoblox/dnstools:latest dnstools
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2. Query the DNS server:
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/ # host kubernetes

‎charts/coredns/templates/_helpers.tpl‎

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{{/* vim: set filetype=mustache: */}}
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{{/*
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Expand the name of the chart.
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*/}}
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{{- define "coredns.name" -}}
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{{- default .Chart.Name .Values.nameOverride | trunc 63 | trimSuffix "-" -}}
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{{- end -}}
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{{/*
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Create a default fully qualified app name.
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We truncate at 63 chars because some Kubernetes name fields are limited to this (by the DNS naming spec).
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*/}}
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{{- define "coredns.fullname" -}}
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{{- if .Values.fullnameOverride -}}
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{{- .Values.fullnameOverride | trunc 63 | trimSuffix "-" -}}
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{{- else -}}
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{{- $name := default .Chart.Name .Values.nameOverride -}}
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{{- printf "%s-%s" .Release.Name $name | trunc 63 | trimSuffix "-" -}}
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{{- end -}}
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{{- end -}}
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{{/*
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Generate the list of ports automatically from the server definitions
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*/}}
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{{- define "coredns.servicePorts" -}}
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{{/* Set ports to be an empty dict */}}
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{{- $ports := dict -}}
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{{/* Iterate through each of the server blocks */}}
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{{- range .Values.servers -}}
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{{/* Capture port to avoid scoping awkwardness */}}
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{{- $port := toString .port -}}
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{{/* If none of the server blocks has mentioned this port yet take note of it */}}
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{{- if not (hasKey $ports $port) -}}
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{{- $ports := set $ports $port (dict "istcp" false "isudp" false) -}}
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{{- end -}}
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{{/* Retrieve the inner dict that holds the protocols for a given port */}}
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{{- $innerdict := index $ports $port -}}
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{{/*
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Look at each of the zones and check which protocol they serve
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At the moment the following are supported by CoreDNS:
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UDP: dns://
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TCP: tls://, grpc://
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*/}}
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{{- range .zones -}}
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{{- if has (default "" .scheme) (list "dns://") -}}
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{{/* Optionally enable tcp for this service as well */}}
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{{- if eq (default false .use_tcp) true }}
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{{- $innerdict := set $innerdict "istcp" true -}}
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{{- end }}
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{{- $innerdict := set $innerdict "isudp" true -}}
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{{- end -}}
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{{- if has (default "" .scheme) (list "tls://" "grpc://") -}}
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{{- $innerdict := set $innerdict "istcp" true -}}
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{{- end -}}
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{{- end -}}
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{{/* If none of the zones specify scheme, default to dns:// on both tcp & udp */}}
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{{- if and (not (index $innerdict "istcp")) (not (index $innerdict "isudp")) -}}
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{{- $innerdict := set $innerdict "isudp" true -}}
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{{- $innerdict := set $innerdict "istcp" true -}}
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{{- end -}}
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{{/* Write the dict back into the outer dict */}}
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{{- $ports := set $ports $port $innerdict -}}
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{{- end -}}
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{{/* Write out the ports according to the info collected above */}}
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{{- range $port, $innerdict := $ports -}}
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{{- if index $innerdict "isudp" -}}
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{{- printf "- {port: %v, protocol: UDP, name: udp-%s}\n" $port $port -}}
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{{- end -}}
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{{- if index $innerdict "istcp" -}}
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{{- printf "- {port: %v, protocol: TCP, name: tcp-%s}\n" $port $port -}}
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{{- end -}}
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{{- end -}}
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{{- end -}}
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{{/*
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Generate the list of ports automatically from the server definitions
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*/}}
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{{- define "coredns.containerPorts" -}}
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{{/* Set ports to be an empty dict */}}
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{{- $ports := dict -}}
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{{/* Iterate through each of the server blocks */}}
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{{- range .Values.servers -}}
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{{/* Capture port to avoid scoping awkwardness */}}
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{{- $port := toString .port -}}
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{{/* If none of the server blocks has mentioned this port yet take note of it */}}
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{{- if not (hasKey $ports $port) -}}
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{{- $ports := set $ports $port (dict "istcp" false "isudp" false) -}}
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{{- end -}}
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{{/* Retrieve the inner dict that holds the protocols for a given port */}}
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{{- $innerdict := index $ports $port -}}
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{{/*
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Look at each of the zones and check which protocol they serve
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At the moment the following are supported by CoreDNS:
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UDP: dns://
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TCP: tls://, grpc://
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*/}}
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{{- range .zones -}}
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{{- if has (default "" .scheme) (list "dns://") -}}
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{{/* Optionally enable tcp for this service as well */}}
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{{- if eq (default false .use_tcp) true }}
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{{- $innerdict := set $innerdict "istcp" true -}}
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{{- end }}
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{{- $innerdict := set $innerdict "isudp" true -}}
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{{- end -}}
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{{- if has (default "" .scheme) (list "tls://" "grpc://") -}}
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{{- $innerdict := set $innerdict "istcp" true -}}
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{{- end -}}
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{{- end -}}
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{{/* If none of the zones specify scheme, default to dns:// on both tcp & udp */}}
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{{- if and (not (index $innerdict "istcp")) (not (index $innerdict "isudp")) -}}
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{{- $innerdict := set $innerdict "isudp" true -}}
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{{- $innerdict := set $innerdict "istcp" true -}}
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{{- end -}}
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{{/* Write the dict back into the outer dict */}}
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{{- $ports := set $ports $port $innerdict -}}
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{{- end -}}
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{{/* Write out the ports according to the info collected above */}}
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{{- range $port, $innerdict := $ports -}}
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{{- if index $innerdict "isudp" -}}
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{{- printf "- {containerPort: %v, protocol: UDP, name: udp-%s}\n" $port $port -}}
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{{- end -}}
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{{- if index $innerdict "istcp" -}}
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{{- printf "- {containerPort: %v, protocol: TCP, name: tcp-%s}\n" $port $port -}}
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{{- end -}}
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{{- end -}}
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{{- end -}}
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{{/*
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Create the name of the service account to use
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*/}}
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{{- define "coredns.serviceAccountName" -}}
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{{- if .Values.serviceAccount.create -}}
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{{ default (include "coredns.fullname" .) .Values.serviceAccount.name }}
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{{- else -}}
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{{ default "default" .Values.serviceAccount.name }}
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{{- end -}}
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{{- end -}}

‎charts/coredns/templates/clusterrole-autoscaler.yaml‎

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{{- if and .Values.autoscaler.enabled .Values.rbac.create }}
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---
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apiVersion: rbac.authorization.k8s.io/v1
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kind: ClusterRole
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metadata:
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name: {{ template "coredns.fullname" . }}-autoscaler
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labels:
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app.kubernetes.io/managed-by: {{ .Release.Service | quote }}
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app.kubernetes.io/instance: {{ .Release.Name | quote }}
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helm.sh/chart: "{{ .Chart.Name }}-{{ .Chart.Version | replace "+" "_" }}"
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{{- if .Values.isClusterService }}
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k8s-app: {{ .Chart.Name }}-autoscaler
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kubernetes.io/cluster-service: "true"
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kubernetes.io/name: "CoreDNS"
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{{- end }}
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app.kubernetes.io/name: {{ template "coredns.name" . }}-autoscaler
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{{- if .Values.customLabels }}
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{{ toYaml .Values.customLabels | indent 4 }}
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{{- end }}
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rules:
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- apiGroups: [""]
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resources: ["nodes"]
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verbs: ["list","watch"]
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- apiGroups: [""]
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resources: ["replicationcontrollers/scale"]
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verbs: ["get", "update"]
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- apiGroups: ["extensions", "apps"]
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resources: ["deployments/scale", "replicasets/scale"]
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verbs: ["get", "update"]
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# Remove the configmaps rule once below issue is fixed:
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# kubernetes-incubator/cluster-proportional-autoscaler#16
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- apiGroups: [""]
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resources: ["configmaps"]
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verbs: ["get", "create"]
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{{- end }}

‎charts/coredns/templates/clusterrole.yaml‎

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{{- if .Values.rbac.create }}
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apiVersion: rbac.authorization.k8s.io/v1
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kind: ClusterRole
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metadata:
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name: {{ template "coredns.fullname" . }}
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labels:
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app.kubernetes.io/managed-by: {{ .Release.Service | quote }}
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app.kubernetes.io/instance: {{ .Release.Name | quote }}
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helm.sh/chart: "{{ .Chart.Name }}-{{ .Chart.Version | replace "+" "_" }}"
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{{- if .Values.isClusterService }}
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k8s-app: {{ .Chart.Name | quote }}
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kubernetes.io/cluster-service: "true"
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kubernetes.io/name: "CoreDNS"
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{{- end }}
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app.kubernetes.io/name: {{ template "coredns.name" . }}
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rules:
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- apiGroups:
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- ""
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resources:
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- endpoints
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- services
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- pods
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- namespaces
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verbs:
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- list
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- watch
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{{- if .Values.rbac.pspEnable }}
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- apiGroups:
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- policy
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- extensions
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resources:
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- podsecuritypolicies
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verbs:
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- use
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resourceNames:
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- {{ template "coredns.fullname" . }}
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{{- end }}
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{{- end }}

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