Add helm chart

helm/Chart.yaml

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+name: loki
+version: 0.0.1
+appVersion: 0.0.1
+kubeVersion: "^1.10.0-0"
+description: "Loki: like Prometheus, but for logs."
+home: https://grafana.com/loki
+icon: https://github.com/grafana/loki/raw/master/docs/logo.png
+sources:
+  - https://github.com/grafana/loki
+maintainers:
+  - name: TDB
+    email: TBD@gmail.com
+engine: gotpl

helm/templates/loki/_helpers.tpl

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+{{/* vim: set filetype=mustache: */}}
+{{/*
+Expand the name of the chart.
+*/}}
+{{- define "loki.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 "loki.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 "loki.chart" -}}
+{{- printf "%s-%s" .Chart.Name .Chart.Version | replace "+" "_" | trunc 63 | trimSuffix "-" -}}
+{{- end -}}
+
+{{/*
+Create the name of the service account
+*/}}
+{{- define "loki.serviceAccountName" -}}
+{{- if .Values.serviceAccount.create -}}
+    {{ default (include "loki.fullname" .) .Values.serviceAccount.name }}
+{{- else -}}
+    {{ default "default" .Values.serviceAccount.name }}
+{{- end -}}
+{{- end -}}

helm/templates/loki/configmap.yaml

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+apiVersion: v1
+kind: ConfigMap
+metadata:
+  name: {{ template "loki.fullname" . }}
+  labels:
+    app: {{ template "loki.name" . }}
+    chart: {{ template "loki.chart" . }}
+    release: {{ .Release.Name }}
+    heritage: {{ .Release.Service }}
+data:
+  loki.yaml: |
+    auth_enabled: {{ .Values.loki.configauth_enabled }}
+
+    server:
+      http_listen_port: {{ .Values.loki.service.port }}
+
+    ingester:
+      lifecycler:
+        ring:
+          store: {{ .Values.loki.config.ingester.lifecycler.ring.store }}
+          replication_factor: {{ .Values.loki.config.ingester.lifecycler.ring.replication_factor }}
+
+{{- if .Values.loki.config.schema_configs }}
+    schema_config:
+      configs:
+  {{- range .Values.loki.config.schema_configs }}
+      - from: {{ .from }}
+        store: {{ .store }}
+        object_store: {{ .object_store }}
+        schema: {{ .schema }}
+        index:
+          prefix: {{ .index.prefix }}
+          period: {{ .index.period }}
+  {{- end -}}
+{{- end -}}
+
+{{- if .Values.loki.config.storage_configs }}
+    storage_config:
+  {{- range .Values.loki.config.storage_configs }}
+      {{ .name }}:
+        directory: {{ .directory }}
+  {{- end -}}
+{{- end -}}

helm/templates/loki/deployment.yaml

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+apiVersion: apps/v1beta2
+kind: Deployment
+metadata:
+  name: {{ template "loki.fullname" . }}
+  labels:
+    app: {{ template "loki.name" . }}
+    chart: {{ template "loki.chart" . }}
+    release: {{ .Release.Name }}
+    heritage: {{ .Release.Service }}
+{{- with .Values.loki.annotations }}
+  annotations:
+{{ toYaml . | indent 4 }}
+{{- end }}
+spec:
+  replicas: {{ .Values.loki.replicas }}
+  selector:
+    matchLabels:
+      app: {{ template "loki.name" . }}
+      release: {{ .Release.Name }}
+  strategy:
+    type: {{ .Values.loki.deploymentStrategy }}
+  {{- if ne .Values.loki.deploymentStrategy "RollingUpdate" }}
+    rollingUpdate: null
+  {{- end }}
+  template:
+    metadata:
+      labels:
+        app: {{ template "loki.name" . }}
+        release: {{ .Release.Name }}
+{{- with .Values.loki.podAnnotations }}
+      annotations:
+{{ toYaml . | indent 8 }}
+{{- end }}
+    spec:
+      serviceAccountName: {{ template "loki.serviceAccountName" . }}
+{{- if .Values.loki.priorityClassName }}
+      priorityClassName: {{ .Values.loki.priorityClassName }}
+{{- end }}
+      containers:
+        - name: {{ .Chart.Name }}
+          image: "{{ .Values.loki.image.repository }}:{{ .Values.loki.image.tag }}"
+          imagePullPolicy: {{ .Values.loki.image.pullPolicy }}
+          args: 
+            - "-config.file=/etc/loki/loki.yaml"
+          volumeMounts:
+            - name: config
+              mountPath: /etc/loki
+          ports:
+            - name: {{ template "loki.name" . }}
+              containerPort: {{ .Values.loki.service.port }}
+              protocol: TCP
+          livenessProbe:
+{{ toYaml .Values.loki.livenessProbe | indent 12 }}
+          readinessProbe:
+{{ toYaml .Values.loki.readinessProbe | indent 12 }}
+    {{- with .Values.loki.nodeSelector }}
+      nodeSelector:
+{{ toYaml . | indent 8 }}
+    {{- end }}
+    {{- with .Values.loki.affinity }}
+      affinity:
+{{ toYaml . | indent 8 }}
+    {{- end }}
+    {{- with .Values.loki.tolerations }}
+      tolerations:
+{{ toYaml . | indent 8 }}
+    {{- end }}
+      volumes:
+        - name: config
+          configMap:
+            name: {{ template "loki.fullname" . }}

helm/templates/loki/podsecuritypolicy.yaml

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+{{- if .Values.rbac.pspEnabled }}
+apiVersion: extensions/v1beta1
+kind: PodSecurityPolicy
+metadata:
+  name: {{ template "loki.fullname" . }}
+  labels:
+    app: {{ template "loki.name" . }}
+    chart: {{ .Chart.Name }}-{{ .Chart.Version }}
+    heritage: {{ .Release.Service }}
+    release: {{ .Release.Name }}
+spec:
+  privileged: false
+  allowPrivilegeEscalation: false
+  volumes:
+    - 'configMap'
+  hostNetwork: false
+  hostIPC: false
+  hostPID: false
+  runAsUser:
+    rule: 'RunAsAny'
+  seLinux:
+    rule: 'RunAsAny'
+  supplementalGroups:
+    rule: 'RunAsAny'
+  fsGroup:
+    rule: 'RunAsAny'
+  readOnlyRootFilesystem: false
+{{- end }}

helm/templates/loki/role.yaml

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+{{- if .Values.rbac.create }}
+apiVersion: rbac.authorization.k8s.io/v1beta1
+kind: Role
+metadata:
+  name: {{ template "loki.fullname" . }}
+  labels:
+    app: {{ template "loki.name" . }}
+    chart: {{ .Chart.Name }}-{{ .Chart.Version }}
+    heritage: {{ .Release.Service }}
+    release: {{ .Release.Name }}
+{{- if .Values.rbac.pspEnabled }}
+rules:
+- apiGroups:      ['extensions']
+  resources:      ['podsecuritypolicies']
+  verbs:          ['use']
+  resourceNames:  [{{ template "loki.fullname" . }}]
+{{- end }}
+{{- end }}

helm/templates/loki/rolebinding.yaml

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+{{- if .Values.rbac.create -}}
+apiVersion: rbac.authorization.k8s.io/v1beta1
+kind: RoleBinding
+metadata:
+  name: {{ template "loki.fullname" . }}
+  labels:
+    app: {{ template "loki.name" . }}
+    chart: {{ .Chart.Name }}-{{ .Chart.Version }}
+    heritage: {{ .Release.Service }}
+    release: {{ .Release.Name }}
+roleRef:
+  apiGroup: rbac.authorization.k8s.io
+  kind: Role
+  name: {{ template "loki.fullname" . }}
+subjects:
+- kind: ServiceAccount
+  name: {{ template "loki.serviceAccountName" . }}
+{{- end -}}

helm/templates/loki/service.yaml

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+apiVersion: v1
+kind: Service
+metadata:
+  name: {{ template "loki.fullname" . }}
+  labels:
+    app: {{ template "loki.name" . }}
+    chart: {{ template "loki.chart" . }}
+    release: {{ .Release.Name }}
+    heritage: {{ .Release.Service }}
+{{- if .Values.loki.service.labels }}
+{{ toYaml .Values.loki.service.labels | indent 4 }}
+{{- end }}
+{{- with .Values.loki.service.annotations }}
+  annotations:
+{{ toYaml . | indent 4 }}
+{{- end }}
+spec:
+  ports:
+    - name: {{ template "loki.name" . }}
+      port: {{ .Values.loki.service.port }}
+      protocol: TCP
+      targetPort: {{ .Values.loki.service.port }}
+  selector:
+    app: {{ template "loki.name" . }}
+    release: {{ .Release.Name }}

helm/templates/loki/serviceaccount.yaml

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+{{- if .Values.serviceAccount.create }}
+apiVersion: v1
+kind: ServiceAccount
+metadata:
+  labels:
+    app: {{ template "loki.name" . }}
+    chart: {{ .Chart.Name }}-{{ .Chart.Version }}
+    heritage: {{ .Release.Service }}
+    release: {{ .Release.Name }}
+  name: {{ template "loki.serviceAccountName" . }}
+{{- end }}

helm/templates/promtail/_helpers.tpl

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+{{/* vim: set filetype=mustache: */}}
+{{/*
+Expand the name of the chart.
+*/}}
+{{- define "promtail.name" -}}
+{{- default .Chart.Name .Values.promtail.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 "promtail.fullname" -}}
+{{- if .Values.fullnameOverride -}}
+{{- .Values.fullnameOverride | trunc 63 | trimSuffix "-" -}}
+{{- else -}}
+{{- $name := default .Chart.Name .Values.promtail.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 "promtail.chart" -}}
+{{- printf "%s-%s" .Chart.Name .Chart.Version | replace "+" "_" | trunc 63 | trimSuffix "-" -}}
+{{- end -}}
+
+{{/*
+Create the name of the service account
+*/}}
+{{- define "promtail.serviceAccountName" -}}
+{{- if .Values.serviceAccount.create -}}
+    {{ default (include "promtail.fullname" .) .Values.serviceAccount.name }}
+{{- else -}}
+    {{ default "default" .Values.serviceAccount.name }}
+{{- end -}}
+{{- end -}}

helm/templates/promtail/clusterrole.yaml

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+{{- if .Values.rbac.create }}
+kind: ClusterRole
+apiVersion: rbac.authorization.k8s.io/v1
+metadata:
+  labels:
+    app: {{ template "promtail.name" . }}
+    chart: {{ template "promtail.chart" . }}
+    release: {{ .Release.Name }}
+    heritage: {{ .Release.Service }}
+{{- with .Values.promtail.annotations }}
+  annotations:
+{{ toYaml . | indent 4 }}
+{{- end }}
+  name: {{ template "promtail.fullname" . }}-clusterrole
+rules:
+- apiGroups: [""] # "" indicates the core API group
+  resources:
+  - nodes
+  - nodes/proxy
+  - services
+  - endpoints
+  - pods  
+  verbs: ["get", "watch", "list"]
+{{- end}}

helm/templates/promtail/clusterrolebinding.yaml

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+{{- if .Values.rbac.create }}
+kind: ClusterRoleBinding
+apiVersion: rbac.authorization.k8s.io/v1
+metadata:
+  name: {{ template "promtail.fullname" . }}-clusterrolebinding
+  labels:
+    app: {{ template "promtail.name" . }}
+    chart: {{ template "promtail.chart" . }}
+    release: {{ .Release.Name }}
+    heritage: {{ .Release.Service }}
+{{- with .Values.promtail.annotations }}
+  annotations:
+{{ toYaml . | indent 4 }}
+{{- end }}
+subjects:
+  - kind: ServiceAccount
+    name: {{ template "promtail.serviceAccountName" . }}
+    namespace: {{ .Release.Namespace }}
+roleRef:
+  kind: ClusterRole
+  name: {{ template "promtail.fullname" . }}-clusterrole
+  apiGroup: rbac.authorization.k8s.io
+{{- end}}