From e94d6f78d7584b64115905d4d6f7959160dd1936 Mon Sep 17 00:00:00 2001
From: kaiyou <dev@kaiyou.fr>
Date: Sat, 29 Oct 2022 21:07:02 +0200
Subject: [PATCH] Enable daemonset deployment using the helm chart

DaemonSet is a k8s resource that schedules one instance per node,
which is useful for some garage deployment use cases, including
managing garage nodes using k8s node labels
---
 .../{statefulset.yaml => workload.yaml}       | 23 ++++++++++++++++---
 script/helm/garage/values.yaml                | 12 ++++++++--
 2 files changed, 30 insertions(+), 5 deletions(-)
 rename script/helm/garage/templates/{statefulset.yaml => workload.yaml} (84%)

diff --git a/script/helm/garage/templates/statefulset.yaml b/script/helm/garage/templates/workload.yaml
similarity index 84%
rename from script/helm/garage/templates/statefulset.yaml
rename to script/helm/garage/templates/workload.yaml
index bda40117..f41eff6f 100644
--- a/script/helm/garage/templates/statefulset.yaml
+++ b/script/helm/garage/templates/workload.yaml
@@ -1,15 +1,17 @@
 apiVersion: apps/v1
-kind: StatefulSet
+kind: {{ .Values.deployment.kind }}
 metadata:
   name: {{ include "garage.fullname" . }}
   labels:
     {{- include "garage.labels" . | nindent 4 }}
 spec:
-  replicas: {{ .Values.replicaCount }}
   selector:
     matchLabels:
       {{- include "garage.selectorLabels" . | nindent 6 }}
+  {{- if eq .Values.deployment.kind "StatefulSet" }}
+  replicas: {{ .Values.deployment.replicaCount }}
   serviceName: {{ include "garage.fullname" . }}
+  {{- end }}
   template:
     metadata:
       {{- with .Values.podAnnotations }}
@@ -79,6 +81,21 @@ spec:
             name: {{ include "garage.fullname" . }}-config
         - name: etc
           emptyDir: {}
+        {{- if eq .Values.deployment.kind "DaemonSet" }}
+        {{- if .Values.persistence.enabled }}
+        - name: meta
+          hostPath:
+            path: {{ .Values.persistence.meta.hostPath }}
+        - name: data
+          hostPath:
+            path: {{ .Values.persistence.data.hostPath }}
+        {{- else }}
+        {{- end }}
+        - name: meta
+          emptyDir: {}
+        - name: data
+          emptyDir: {}
+        {{- end }}
       {{- with .Values.nodeSelector }}
       nodeSelector:
         {{- toYaml . | nindent 8 }}
@@ -91,7 +108,7 @@ spec:
       tolerations:
         {{- toYaml . | nindent 8 }}
       {{- end }}
-  {{- if .Values.persistence.enabled }}
+  {{- if and .Values.persistence.enabled (eq .Values.deployment.kind "StatefulSet") }}
   volumeClaimTemplates:
   - metadata:
       name: meta
diff --git a/script/helm/garage/values.yaml b/script/helm/garage/values.yaml
index 608ee53c..52f1910a 100644
--- a/script/helm/garage/values.yaml
+++ b/script/helm/garage/values.yaml
@@ -29,12 +29,20 @@ persistence:
   meta:
     # storageClass: "fast-storage-class"
     size: 100Mi
+    # used only for daemon sets
+    hostPath: /var/lib/garage/meta
   data:
     # storageClass: "slow-storage-class"
     size: 100Mi
+    # used only for daemon sets
+    hostPath: /var/lib/garage/data
 
-# Number of StatefulSet replicas/garage nodes to start
-replicaCount: 3
+# Deployment configuration
+deployment:
+  # Switchable to DaemonSet
+  kind: StatefulSet
+  # Number of StatefulSet replicas/garage nodes to start
+  replicaCount: 3
 
 image:
   repository: dxflrs/amd64_garage