Added helm chart

Signed-off-by: Mathias Kaufmann <me@stei.gr>

charts/goircd/.helmignore

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

charts/goircd/Chart.yaml

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+apiVersion: v1
+appVersion: "1.0"
+description: minimalistic simple Internet Relay Chat (IRC) server
+name: goircd
+version: 0.1.0

charts/goircd/templates/NOTES.txt

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+1. Get the application URL by running these commands:
+{{- if contains "NodePort" .Values.service.type }}
+  export NODE_PORT=$(kubectl get --namespace {{ .Release.Namespace }} -o jsonpath="{.spec.ports[0].nodePort}" services {{ template "goircd.fullname" . }})
+  export NODE_IP=$(kubectl get nodes --namespace {{ .Release.Namespace }} -o jsonpath="{.items[0].status.addresses[0].address}")
+  echo http://$NODE_IP:$NODE_PORT
+{{- else if contains "LoadBalancer" .Values.service.type }}
+     NOTE: It may take a few minutes for the LoadBalancer IP to be available.
+           You can watch the status of by running 'kubectl get svc -w {{ template "goircd.fullname" . }}'
+  export SERVICE_IP=$(kubectl get svc --namespace {{ .Release.Namespace }} {{ template "goircd.fullname" . }} -o jsonpath='{.status.loadBalancer.ingress[0].ip}')
+  echo http://$SERVICE_IP:{{ .Values.service.port }}
+{{- else if contains "ClusterIP" .Values.service.type }}
+  export POD_NAME=$(kubectl get pods --namespace {{ .Release.Namespace }} -l "app={{ template "goircd.name" . }},release={{ .Release.Name }}" -o jsonpath="{.items[0].metadata.name}")
+  echo "Visit irc://127.0.0.1:6667 to use your application"
+  kubectl port-forward $POD_NAME 6667:6667
+{{- end }}

charts/goircd/templates/_helpers.tpl

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+{{/* vim: set filetype=mustache: */}}
+{{/*
+Expand the name of the chart.
+*/}}
+{{- define "goircd.name" -}}
+{{- default .Chart.Name .Values.nameOverride | trunc 63 | trimSuffix "-" -}}
+{{- end -}}
+
+{{/*
+Create a default fully qualified app name.
+We truncate at 63 chars because some Kubernetes name fields are limited to this (by the DNS naming spec).
+If release name contains chart name it will be used as a full name.
+*/}}
+{{- define "goircd.fullname" -}}
+{{- if .Values.fullnameOverride -}}
+{{- .Values.fullnameOverride | trunc 63 | trimSuffix "-" -}}
+{{- else -}}
+{{- $name := default .Chart.Name .Values.nameOverride -}}
+{{- if contains $name .Release.Name -}}
+{{- .Release.Name | trunc 63 | trimSuffix "-" -}}
+{{- else -}}
+{{- printf "%s-%s" .Release.Name $name | trunc 63 | trimSuffix "-" -}}
+{{- end -}}
+{{- end -}}
+{{- end -}}
+
+{{/*
+Create chart name and version as used by the chart label.
+*/}}
+{{- define "goircd.chart" -}}
+{{- printf "%s-%s" .Chart.Name .Chart.Version | replace "+" "_" | trunc 63 | trimSuffix "-" -}}
+{{- end -}}

charts/goircd/templates/configmap.yaml

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+apiVersion: v1
+kind: ConfigMap
+metadata:
+  name: {{ template "goircd.fullname" . }}
+data:
+  BIND: ":{{ .Values.service.internalPort }}"
+  HEALTHCHECK: {{ .Values.config.healthcheck | quote  }}
+  HOSTNAME: {{ .Values.config.hostname | quote  }}
+  METRICS: {{ .Values.config.metrics | quote  }}
+  MOTD: |
+    {{ .Values.config.motd }}

charts/goircd/templates/deployment.yaml

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+apiVersion: apps/v1beta2
+kind: Deployment
+metadata:
+  name: {{ template "goircd.fullname" . }}
+  labels:
+    app: {{ template "goircd.name" . }}
+    chart: {{ template "goircd.chart" . }}
+    release: {{ .Release.Name }}
+    heritage: {{ .Release.Service }}
+spec:
+  replicas: {{ .Values.replicaCount }}
+  selector:
+    matchLabels:
+      app: {{ template "goircd.name" . }}
+      release: {{ .Release.Name }}
+  template:
+    metadata:
+      labels:
+        app: {{ template "goircd.name" . }}
+        release: {{ .Release.Name }}
+    spec:
+      volumes:
+        - name: config
+          configMap:
+            name: {{ template "goircd.fullname" . }}
+      containers:
+        - name: {{ .Chart.Name }}
+          image: "{{ .Values.image.repository }}:{{ .Values.image.tag }}"
+          imagePullPolicy: {{ .Values.image.pullPolicy }}
+          args:
+            - -motd
+            - /config/MOTD
+          envFrom:
+            - configMapRef:
+                name: {{ template "goircd.fullname" . }}
+          volumeMounts:
+            - name: config
+              mountPath: /config
+          ports:
+            - name: irc
+              containerPort: {{ .Values.service.internalPort }}
+              protocol: TCP
+            - name: health
+              containerPort: {{ .Values.image.healthcheckPort }}
+              protocol: TCP
+          livenessProbe:
+            httpGet:
+              path: /live
+              port: health
+          readinessProbe:
+            httpGet:
+              path: /ready
+              port: health
+          resources:
+{{ toYaml .Values.resources | indent 12 }}
+    {{- with .Values.nodeSelector }}
+      nodeSelector:
+{{ toYaml . | indent 8 }}
+    {{- end }}
+    {{- with .Values.affinity }}
+      affinity:
+{{ toYaml . | indent 8 }}
+    {{- end }}
+    {{- with .Values.tolerations }}
+      tolerations:
+{{ toYaml . | indent 8 }}
+    {{- end }}

charts/goircd/templates/service.yaml

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+apiVersion: v1
+kind: Service
+metadata:
+  name: {{ template "goircd.fullname" . }}
+  labels:
+    app: {{ template "goircd.name" . }}
+    chart: {{ template "goircd.chart" . }}
+    release: {{ .Release.Name }}
+    heritage: {{ .Release.Service }}
+spec:
+  type: {{ .Values.service.type }}
+  ports:
+    - port: {{ .Values.service.externalPort }}
+      targetPort: irc
+      protocol: TCP
+      name: irc
+  selector:
+    app: {{ template "goircd.name" . }}
+    release: {{ .Release.Name }}

charts/goircd/values.yaml

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+# Default values for goircd.
+# This is a YAML-formatted file.
+# Declare variables to be passed into your templates.
+
+replicaCount: 1
+
+config:
+  healthcheck: true
+  hostname: irc.example.com
+  metrics: true
+  motd: |
+    Hello kubernetes with helm
+
+image:
+  repository: quay.io/goircd/goircd
+  tag: latest
+  pullPolicy: IfNotPresent
+  healthcheckPort: 8086
+
+service:
+  type: ClusterIP
+  internalPort: 6667
+  externalPort: 6967
+
+resources:
+  limits:
+   cpu: 10m
+   memory: 20Mi
+  requests:
+   cpu: 10m
+   memory: 20Mi
+
+nodeSelector: {}
+
+tolerations: []
+
+affinity: {}