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[stable/gcp-night-king] Add new Helm Chart for GCP Night King service (#3205)
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Itamar Ostricher
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k8s-ci-robot
k8s-ci-robot
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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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apiVersion: v1
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description: A Helm chart for GCP Night King
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name: gcp-night-king
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version: 1.0.0
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appVersion: 1.0
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home: https://hub.docker.com/r/itamarost/gcp-night-king/
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sources:
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- https://github.com/itamaro/gcp-go-night-king
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- https://github.com/itamaro/gcp-night-king
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maintainers:
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- name: itamaro
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email: itamarost@gmail.com
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# GCP Night King Helm Chart
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This directory contains a Kubernetes chart to deploy a
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[GCP Night King](https://github.com/itamaro/gcp-go-night-king) service.
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## TL;DR;
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```console
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$ helm install stable/gcp-night-king --set projectID=$( gcloud config get-value project )
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```
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## Chart Details
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This chart will do the following:
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* Install a service (K8s Deployment) that listens on a Pub/Sub subscription for instance preemption
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messages and resurrects preempted instances once they are terminated.
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## Installing the Chart
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To install the chart with the release name `my-release`:
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```console
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$ helm install --name my-release stable/gcp-night-king
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```
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## Uninstalling the Chart
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To uninstall/delete the my-release deployment:
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```console
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$ helm delete my-release
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```
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The command removes all the Kubernetes components associated with the chart and deletes the release.
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## Configuration
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The following tables lists the configurable parameters of this chart and their default values.
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| Parameter | Description | Default |
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|------------------------|-------------------------------------------|---------------------------------|
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| `image.pullPolicy` | Container pull policy | `IfNotPresent` |
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| `image.repository` | Container image to use | `itamarost/gcp-night-king` |
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| `image.tag` | Container image tag to deploy | `v1-golang` |
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| `replicaCount` | k8s replicas | `1` |
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| `resources` | Service resource requests and limits | `nil` |
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| `projectID` | GCE project ID for GCE API | Mandatory parameter |
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| `subscriptionName` | Pub/Sub subscription name to listen on | `nil` |
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| `nodeSelector` | Node labels for pod assignment | `{}` |
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Specify each parameter using the `--set key=value[,key=value]` argument to `helm install`.
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{{- if eq (printf "%s" .Values.projectID) "MUST PROVIDE PROJECT ID" }}
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##############################################################################
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#### ERROR: You did not provide projectID in your 'helm install' call. ####
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##############################################################################
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This deployment will be incomplete until provide a project ID:
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helm upgrade {{ .Release.Name }} \
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--set projectID=YOUR_PROJECT_ID stable/gcp-night-king
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{{- else -}}
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The Night King service is installed!
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The service is listening for Pub/Sub pre-emption messages
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{{ if .Values.subscriptionName }}on subscription {{ .Values.subscriptionName }}{{ else }}on the default subscription{{ end }} in GCP project {{ .Values.projectID }}.
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Make sure to set up your resurrectable preemptible GCE instances with a shutdown script
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(see https://github.com/itamaro/gcp-go-night-king#configure-shutdown-script).
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{{- end }}
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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 "gcp-night-king.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 "gcp-night-king.fullname" -}}
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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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apiVersion: v1
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kind: ConfigMap
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metadata:
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name: {{ template "gcp-night-king.fullname" . }}-config
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labels:
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app: {{ template "gcp-night-king.name" . }}
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chart: {{ .Chart.Name }}-{{ .Chart.Version }}
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heritage: {{ .Release.Service }}
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release: {{ .Release.Name }}
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data:
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project.id: {{ quote .Values.projectID }}
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{{- if .Values.subscriptionName }}
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subscription.name: {{ quote .Values.subscriptionName }}
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{{- end }}
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{{- if ne (printf "%s" .Values.projectID) "MUST PROVIDE PROJECT ID" }}
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apiVersion: apps/v1beta1
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kind: Deployment
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metadata:
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name: {{ template "gcp-night-king.fullname" . }}
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labels:
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app: {{ template "gcp-night-king.name" . }}
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chart: {{ .Chart.Name }}-{{ .Chart.Version | replace "+" "_" }}
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release: {{ .Release.Name }}
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heritage: {{ .Release.Service }}
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spec:
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replicas: {{ .Values.replicaCount }}
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template:
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metadata:
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labels:
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app: {{ template "gcp-night-king.name" . }}
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release: {{ .Release.Name }}
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annotations:
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checksum/config: {{ include (print $.Template.BasePath "/configmap.yaml") . | sha256sum | quote }}
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spec:
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containers:
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- name: {{ .Chart.Name }}
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image: "{{ .Values.image.repository }}:{{ .Values.image.tag }}"
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imagePullPolicy: {{ .Values.image.pullPolicy }}
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command:
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- /usr/bin/nightking
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- "-project"
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- $(PROJECT_ID)
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{{- if .Values.subscriptionName }}
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- "-subscription-name"
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- $(SUBSCRIPTION_NAME)
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{{- end }}
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env:
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- name: "PROJECT_ID"
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valueFrom:
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configMapKeyRef:
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name: {{ template "gcp-night-king.fullname" . }}-config
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key: project.id
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{{- if .Values.subscriptionName }}
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- name: "SUBSCRIPTION_NAME"
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valueFrom:
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configMapKeyRef:
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name: {{ template "gcp-night-king.fullname" . }}-config
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key: subscription.name
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{{- end }}
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resources:
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{{ toYaml .Values.resources | indent 12 }}
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{{- if .Values.nodeSelector }}
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nodeSelector:
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{{ toYaml .Values.nodeSelector | indent 8 }}
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{{- end }}
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{{- end }}
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# Default values for gcp-night-king.
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# This is a YAML-formatted file.
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# Declare variables to be passed into your templates.
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replicaCount: 1
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image:
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repository: itamarost/gcp-night-king
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tag: v1-golang
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pullPolicy: IfNotPresent
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## Node labels for pod assignment
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## Ref: https://kubernetes.io/docs/user-guide/node-selection/
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##
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nodeSelector: {}
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resources: {}
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# We usually recommend not to specify default resources and to leave this as a conscious
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# choice for the user. This also increases chances charts run on environments with little
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# resources, such as Minikube. If you do want to specify resources, uncomment the following
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# lines, adjust them as necessary, and remove the curly braces after 'resources:'.
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# limits:
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# cpu: 100m
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# memory: 128Mi
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# requests:
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# cpu: 100m
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# memory: 128Mi
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# GCE project ID for GCE API usage - mandatory paramter
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projectID: "MUST PROVIDE PROJECT ID"
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# Pub/Sub subscription name to listen on
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# subscriptionName: your-pubsub-subscription-name
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