Add garage.singleNode paramter

script/helm/garage/README.md

@@ -31,6 +31,7 @@ S3-compatible object store for small self-hosted geo-distributed deployments
 | garage.garageTomlString | string | `""` | String Template for the garage configuration if set, ignores above values. Values can be templated, see https://garagehq.deuxfleurs.fr/documentation/reference-manual/configuration/ |
 | garage.kubernetesSkipCrd | bool | `false` | Set to true if you want to use k8s discovery but install the CRDs manually outside of the helm chart, for example if you operate at namespace level without cluster resources |
 | garage.replicationFactor | string | `"3"` | Default to 3 replicas, see the replication_factor section at https://garagehq.deuxfleurs.fr/documentation/reference-manual/configuration/#replication_factor |
+| garage.singleNode | bool | `false` | Start Garage with --single-node, run one StatefulSet replica, and render replication_factor = 1 in the generated garage.toml. If using garageTomlString or existingConfigMap, set replication_factor = 1 yourself. |
 | garage.consistencyMode | string | `"consistent"` | Default to read-after-write consistency, see the consistency_mode section at https://garagehq.deuxfleurs.fr/documentation/reference-manual/configuration/#consistency_mode |
 | garage.metadataAutoSnapshotInterval | string | `""` | If this value is set, Garage will automatically take a snapshot of the metadata DB file at a regular interval and save it in the metadata directory. https://garagehq.deuxfleurs.fr/documentation/reference-manual/configuration/#metadata_auto_snapshot_interval |
 | garage.admin.apiBindAddr | string | `"[::]:3903"` |  |

script/helm/garage/templates/configmap.yaml

@@ -15,7 +15,7 @@ data:
 
     block_size = "{{ .Values.garage.blockSize }}"
 
-    replication_factor = {{ .Values.garage.replicationFactor }}
+    replication_factor = {{ ternary 1 .Values.garage.replicationFactor .Values.garage.singleNode }}
     consistency_mode = "{{ .Values.garage.consistencyMode }}"
 
     compression_level = {{ .Values.garage.compressionLevel }}

script/helm/garage/templates/workload.yaml

@@ -9,7 +9,7 @@ spec:
     matchLabels:
       {{- include "garage.selectorLabels" . | nindent 6 }}
   {{- if eq .Values.deployment.kind "StatefulSet" }}
-  replicas: {{ .Values.deployment.replicaCount }}
+  replicas: {{ ternary 1 .Values.deployment.replicaCount .Values.garage.singleNode }}
   serviceName: {{ include "garage.fullname" . }}-headless
   podManagementPolicy: {{ .Values.deployment.podManagementPolicy }}
   {{- end }}
@@ -59,6 +59,13 @@ spec:
             {{- toYaml .Values.securityContext | nindent 12 }}
           image: "{{ .Values.image.repository }}:{{ .Values.image.tag | default .Chart.AppVersion }}"
           imagePullPolicy: {{ .Values.image.pullPolicy }}
+          {{- if .Values.garage.singleNode }}
+          command:
+            - /garage
+          args:
+            - server
+            - --single-node
+          {{- end }}
           ports:
             - containerPort: {{ include "garage.portFromBindAddr" .Values.garage.s3.api.bindAddr | int }}
               name: s3-api

script/helm/garage/values.yaml

@@ -7,7 +7,7 @@ commonLabels: {}
 #   app.kubernetes.io/part-of: storage
 #   team: platform
 
-# Garage configuration. These values go to garage.toml
+# Garage configuration. These values configure Garage and render to garage.toml unless noted otherwise.
 garage:
   # -- Can be changed for better performance on certain systems
   # https://garagehq.deuxfleurs.fr/documentation/reference-manual/configuration/#db_engine
@@ -22,6 +22,10 @@ garage:
   # https://garagehq.deuxfleurs.fr/documentation/reference-manual/configuration/#replication_factor
   replicationFactor: "3"
 
+  # -- Start Garage with --single-node, run one StatefulSet replica, and render replication_factor = 1 in the generated garage.toml.
+  # If using garageTomlString or existingConfigMap, set replication_factor = 1 yourself.
+  singleNode: false
+
   # -- By default, enable read-after-write consistency guarantees, see the consistency_mode section at
   # https://garagehq.deuxfleurs.fr/documentation/reference-manual/configuration/#consistency_mode
   consistencyMode: "consistent"