Merge pull request 'helm chart improvements' (#425) from patrickjahns/garage:helm-improvements into main

Reviewed-on: Deuxfleurs/garage#425

script/helm/garage/templates/configmap.yaml

@@ -4,28 +4,4 @@ metadata:
   name: {{ include "garage.fullname" . }}-config
 data:
   garage.toml: |-
-    metadata_dir = "{{ .Values.garage.metadataDir }}"
-    data_dir = "{{ .Values.garage.dataDir }}"
-
-    replication_mode = "{{ .Values.garage.replicationMode }}"
-
-    rpc_bind_addr = "{{ .Values.garage.rpcBindAddr }}"
-    # rpc_secret will be populated by the init container from a k8s secret object
-    rpc_secret = "__RPC_SECRET_REPLACE__"
-
-    bootstrap_peers = {{ .Values.garage.bootstrapPeers }}
-
-    [kubernetes_discovery]
-    namespace = "{{ .Release.Namespace }}"
-    service_name = "{{ include "garage.fullname" . }}"
-    skip_crd = {{ .Values.garage.kubernetesSkipCrd }}
-
-    [s3_api]
-    s3_region = "{{ .Values.garage.s3.api.region }}"
-    api_bind_addr = "[::]:3900"
-    root_domain = "{{ .Values.garage.s3.api.rootDomain }}"
-
-    [s3_web]
-    bind_addr = "[::]:3902"
-    root_domain = "{{ .Values.garage.s3.web.rootDomain }}"
-    index = "{{ .Values.garage.s3.web.index }}"
+    {{- tpl (index (index .Values.garage) "garage.toml") $ | nindent 4 }}

script/helm/garage/templates/service.yaml

@@ -17,3 +17,24 @@ spec:
       name: s3-web
   selector:
     {{- include "garage.selectorLabels" . | nindent 4 }}
+{{- if .Values.monitoring.metrics.enabled }}
+---
+apiVersion: v1
+kind: Service
+metadata:
+  name: {{ include "garage.fullname" . }}-metrics
+  labels:
+    {{- include "garage.labels" . | nindent 4 }}
+  annotations:
+    prometheus.io/scrape: "true"
+spec:
+  type: ClusterIP
+  clusterIP: None
+  ports:
+    - port: 3903
+      targetPort: 3903
+      protocol: TCP
+      name: metrics
+  selector:
+    {{- include "garage.selectorLabels" . | nindent 4 }}
+{{- end }}

script/helm/garage/templates/servicemonitor.yaml

@@ -0,0 +1,44 @@
+{{- if .Values.monitoring.metrics.serviceMonitor.enabled }}
+---
+apiVersion: monitoring.coreos.com/v1
+kind: ServiceMonitor
+metadata:
+  name: {{ include "garage.fullname" . }}
+  {{- if .Values.monitoring.metrics.serviceMonitor.namespace }}
+  namespace: {{ tpl .Values.monitoring.metrics.serviceMonitor.namespace . }}
+  {{- else }}
+  namespace: {{ .Release.Namespace }}
+  {{- end }}
+  labels:
+    {{- include "garage.labels" . | nindent 4 }}
+    {{- with .Values.monitoring.metrics.serviceMonitor.labels }}
+    {{- toYaml . | nindent 4 }}
+    {{- end }}
+spec:
+  endpoints:
+    - port: metrics
+    {{- with .Values.monitoring.metrics.serviceMonitor.interval }}
+      interval: {{ . }}
+    {{- end }}
+    {{- with .Values.monitoring.metrics.serviceMonitor.scrapeTimeout }}
+      scrapeTimeout: {{ . }}
+    {{- end }}
+      honorLabels: true
+      path: {{ .Values.monitoring.metrics.serviceMonitor.path }}
+      scheme: {{ .Values.monitoring.metrics.serviceMonitor.scheme }}
+    {{- with .Values.monitoring.metrics.serviceMonitor.tlsConfig }}
+      tlsConfig:
+      {{- toYaml . | nindent 6 }}
+    {{- end }}
+    {{- with .Values.monitoring.metrics.serviceMonitor.relabelings }}
+      relabelings:
+      {{- toYaml . | nindent 6 }}
+    {{- end }}
+  jobLabel: "{{ .Release.Name }}"
+  selector:
+    matchLabels:
+      {{- include "garage.selectorLabels" . | nindent 6 }}
+  namespaceSelector:
+    matchNames:
+      - {{ .Release.Namespace }}
+{{- end }}

script/helm/garage/templates/workload.yaml

@@ -14,8 +14,10 @@ spec:
   {{- end }}
   template:
     metadata:
-      {{- with .Values.podAnnotations }}
+
       annotations:
+        checksum/config: {{ include (print $.Template.BasePath "/configmap.yaml") . | sha256sum }}
+      {{- with .Values.podAnnotations }}
         {{- toYaml . | nindent 8 }}
       {{- end }}
       labels:
@@ -31,7 +33,8 @@ spec:
       initContainers:
         # Copies garage.toml from configmap to temporary etc volume and replaces RPC secret placeholder
         - name: {{ .Chart.Name }}-init
-          image: busybox:1.28
+          image: "{{ .Values.initImage.repository }}:{{ .Values.initImage.tag }}"
+          imagePullPolicy: {{ .Values.initImage.pullPolicy }}
           command: ["sh", "-c", "sed \"s/__RPC_SECRET_REPLACE__/$RPC_SECRET/\" /mnt/garage.toml > /mnt/etc/garage.toml"]
           env:
             - name: RPC_SECRET
@@ -39,6 +42,8 @@ spec:
                 secretKeyRef:
                   name: {{ include "garage.rpcSecretName" . }}
                   key: rpcSecret
+          securityContext:
+            {{- toYaml .Values.securityContext | nindent 12 }}
           volumeMounts:
             - name: configmap
               mountPath: /mnt/garage.toml
@@ -56,6 +61,8 @@ spec:
               name: s3-api
             - containerPort: 3902
               name: web-api
+            - containerPort: 3903
+              name: admin
           volumeMounts:
             - name: meta
               mountPath: /mnt/meta

script/helm/garage/values.yaml

@@ -4,8 +4,6 @@
 
 # Garage configuration. These values go to garage.toml
 garage:
-  metadataDir: "/mnt/meta"
-  dataDir: "/mnt/data"
   # Default to 3 replicas, see the replication_mode section at
   # https://garagehq.deuxfleurs.fr/documentation/reference-manual/configuration/
   replicationMode: "3"
@@ -22,6 +20,41 @@ garage:
     web:
       rootDomain: ".web.garage.tld"
       index: "index.html"
+  # Template for the garage configuration
+  # Values can be templated
+  # ref: https://garagehq.deuxfleurs.fr/documentation/reference-manual/configuration/
+  garage.toml: |-
+    metadata_dir = "/mnt/meta"
+    data_dir = "/mnt/data"
+
+    replication_mode = "{{ .Values.garage.replicationMode }}"
+
+    rpc_bind_addr = "{{ .Values.garage.rpcBindAddr }}"
+    # rpc_secret will be populated by the init container from a k8s secret object
+    rpc_secret = "__RPC_SECRET_REPLACE__"
+
+    bootstrap_peers = {{ .Values.garage.bootstrapPeers }}
+
+    [kubernetes_discovery]
+    namespace = "{{ .Release.Namespace }}"
+    service_name = "{{ include "garage.fullname" . }}"
+    skip_crd = {{ .Values.garage.kubernetesSkipCrd }}
+
+    [s3_api]
+    s3_region = "{{ .Values.garage.s3.api.region }}"
+    api_bind_addr = "[::]:3900"
+    root_domain = "{{ .Values.garage.s3.api.rootDomain }}"
+
+    [s3_web]
+    bind_addr = "[::]:3902"
+    root_domain = "{{ .Values.garage.s3.web.rootDomain }}"
+    index = "{{ .Values.garage.s3.web.index }}"
+    
+    [admin]
+    api_bind_addr = "[::]:3903"
+    {{- if .Values.monitoring.tracing.sink }}
+    trace_sink = "{{ .Values.monitoring.tracing.sink }}"
+    {{- end }}
 
 # Data persistence
 persistence:
@@ -50,6 +83,11 @@ image:
   tag: ""
   pullPolicy: IfNotPresent
 
+initImage:
+  repository: busybox
+  tag: stable
+  pullPolicy: IfNotPresent
+
 imagePullSecrets: []
 nameOverride: ""
 fullnameOverride: ""
@@ -65,18 +103,19 @@ serviceAccount:
 
 podAnnotations: {}
 
-podSecurityContext: {}
-  # fsGroup: 2000
+podSecurityContext:
+  runAsUser: 1000
+  runAsGroup: 1000
+  fsGroup: 1000
+  runAsNonRoot: true
 
 securityContext:
   # The default security context is heavily restricted
   # feel free to tune it to your requirements
   capabilities:
     drop:
-    - ALL
+      - ALL
   readOnlyRootFilesystem: true
-  runAsNonRoot: true
-  runAsUser: 1000
 
 service:
   # You can rely on any service to expose your cluster
@@ -90,6 +129,7 @@ service:
     web:
       port: 3902
     # NOTE: the admin API is excluded for now as it is not consistent across nodes
+
 ingress:
   s3:
     api:
@@ -153,3 +193,22 @@ nodeSelector: {}
 tolerations: []
 
 affinity: {}
+
+monitoring:
+  metrics:
+    # If true, a service for monitoring is created with a prometheus.io/scrape annotation
+    enabled: false
+    serviceMonitor:
+      # If true, a ServiceMonitor CRD is created for a prometheus operator
+      # https://github.com/coreos/prometheus-operator
+      enabled: false
+      path: /metrics
+      #  namespace: monitoring  (defaults to use the namespace this chart is deployed to)
+      labels: {}
+      interval: 15s
+      scheme: http
+      tlsConfig: {}
+      scrapeTimeout: 10s
+      relabelings: []
+  tracing:
+    sink: ""