feat(argo-cd): Set ARGOCD_CONTROLLER_REPLICAS automatically (#1413)

Signed-off-by: Petr Drastil <petr.drastil@gmail.com>

charts/argo-cd/Chart.yaml

@@ -2,7 +2,7 @@ apiVersion: v2
 appVersion: v2.4.11
 description: A Helm chart for Argo CD, a declarative, GitOps continuous delivery tool for Kubernetes.
 name: argo-cd
-version: 5.3.0
+version: 5.3.1
 home: https://github.com/argoproj/argo-helm
 icon: https://argo-cd.readthedocs.io/en/stable/assets/logo.png
 keywords:
@@ -21,5 +21,4 @@ dependencies:
     condition: redis-ha.enabled
 annotations:
   artifacthub.io/changes: |
-    - "[Added]: Global configuration for logging"
-    - "[Added]: ApplicationSet configuration for logging"
+    - "[Changed]: Env variable ARGOCD_CONTROLLER_REPLICAS is now automatically set by replica count"

charts/argo-cd/README.md

@@ -437,7 +437,7 @@ NAME: my-release
 | controller.readinessProbe.periodSeconds | int | `10` | How often (in seconds) to perform the [probe] |
 | controller.readinessProbe.successThreshold | int | `1` | Minimum consecutive successes for the [probe] to be considered successful after having failed |
 | controller.readinessProbe.timeoutSeconds | int | `1` | Number of seconds after which the [probe] times out |
-| controller.replicas | int | `1` | The number of application controller pods to run. If changing the number of replicas you must pass the number as `ARGOCD_CONTROLLER_REPLICAS` as an environment variable |
+| controller.replicas | int | `1` | The number of application controller pods to run. Additional replicas will cause sharding of managed clusters across number of replicas. |
 | controller.resources | object | `{}` | Resource limits and requests for the application controller pods |
 | controller.service.annotations | object | `{}` | Application controller service annotations |
 | controller.service.labels | object | `{}` | Application controller service labels |

charts/argo-cd/templates/_helpers.tpl

@@ -265,17 +265,13 @@ Return the default Argo CD app version
 {{- end -}}
 
 {{- define "argo-cd.redisPasswordEnv" -}}
-  {{- if or .Values.externalRedis.password .Values.externalRedis.existingSecret }}
+{{- if or .Values.externalRedis.password .Values.externalRedis.existingSecret -}}
 - name: REDIS_PASSWORD
   valueFrom:
     secretKeyRef:
-    {{- if .Values.externalRedis.existingSecret }}
-      name: {{ .Values.externalRedis.existingSecret }}
-    {{- else }}
-      name: {{ template "argo-cd.redis.fullname" . }}
-    {{- end }}
+      name: {{ default (include "argo-cd.redis.fullname" .) .Values.externalRedis.existingSecret }}
       key: redis-password
-  {{- end }}
+{{- end -}}
 {{- end -}}
 
 {{/*

charts/argo-cd/templates/argocd-application-controller/statefulset.yaml

@@ -68,23 +68,25 @@ spec:
         - {{ .Values.externalRedis.host }}:{{ .Values.externalRedis.port }}
         {{- end }}
         {{- with .Values.controller.extraArgs }}
-        {{- . | toYaml | nindent 8 }}
+          {{- toYaml . | nindent 8 }}
         {{- end }}
         image: {{ default .Values.global.image.repository .Values.controller.image.repository }}:{{ default (include "argo-cd.defaultTag" .) .Values.controller.image.tag }}
         imagePullPolicy: {{ default .Values.global.image.imagePullPolicy .Values.controller.image.imagePullPolicy }}
         name: {{ .Values.controller.name }}
-        {{- if .Values.controller.containerSecurityContext }}
-        securityContext: {{- toYaml .Values.controller.containerSecurityContext | nindent 10 }}
+        {{- with .Values.controller.containerSecurityContext }}
+        securityContext:
+          {{- toYaml . | nindent 10 }}
         {{- end }}
-        {{- if or .Values.controller.env .Values.externalRedis.password .Values.externalRedis.existingSecret  }}
         env:
-          {{- include "argo-cd.redisPasswordEnv" . | nindent 8 }}
           {{- with .Values.controller.env }}
-          {{- toYaml . | nindent 8 }}
+            {{- toYaml . | nindent 10 }}
           {{- end }}
-        {{- end }}
+          - name: ARGOCD_CONTROLLER_REPLICAS
+            value: {{ .Values.controller.replicas | quote }}
+          {{- include "argo-cd.redisPasswordEnv" . | nindent 10 }}
         {{- with .Values.controller.envFrom }}
-        envFrom: {{- toYaml . | nindent 8 }}
+        envFrom:
+          {{- toYaml . | nindent 10 }}
         {{- end }}
         ports:
         - name: controller
@@ -121,29 +123,29 @@ spec:
       {{- with .Values.controller.extraContainers }}
         {{- toYaml . | nindent 6 }}
       {{- end }}
-    {{- if .Values.controller.nodeSelector }}
+      {{- with .Values.controller.nodeSelector }}
       nodeSelector:
-{{- toYaml .Values.controller.nodeSelector | nindent 8 }}
-    {{- end }}
-    {{- if .Values.controller.tolerations }}
+        {{- toYaml . | nindent 8 }}
+      {{- end }}
+      {{- with .Values.controller.tolerations }}
       tolerations:
-{{- toYaml .Values.controller.tolerations | nindent 8 }}
-    {{- end }}
-    {{- if .Values.controller.affinity }}
+        {{- toYaml . | nindent 8 }}
+      {{- end }}
+      {{- with .Values.controller.affinity }}
       affinity:
-{{- toYaml .Values.controller.affinity | nindent 8 }}
-    {{- end }}
-    {{- with .Values.controller.topologySpreadConstraints }}
+        {{- toYaml . | nindent 8 }}
+      {{- end }}
+      {{- with .Values.controller.topologySpreadConstraints }}
       topologySpreadConstraints:
-      {{- range $constraint := . }}
-      - {{ toYaml $constraint | nindent 8 | trim }}
-        {{- if not $constraint.labelSelector }}
-        labelSelector:
-          matchLabels:
-            {{- include "argo-cd.selectorLabels" (dict "context" $ "name" $.Values.controller.name) | nindent 12 }}
+        {{- range $constraint := . }}
+        - {{ toYaml $constraint | nindent 8 | trim }}
+          {{- if not $constraint.labelSelector }}
+          labelSelector:
+            matchLabels:
+              {{- include "argo-cd.selectorLabels" (dict "context" $ "name" $.Values.controller.name) | nindent 12 }}
+          {{- end }}
         {{- end }}
       {{- end }}
-    {{- end }}
       serviceAccountName: {{ template "argo-cd.controllerServiceAccountName" . }}
       {{- with .Values.global.hostAliases }}
       hostAliases:
@@ -164,12 +166,12 @@ spec:
           optional: true
           secretName: argocd-repo-server-tls
       {{- with .Values.controller.volumes }}
-      {{- toYaml . | nindent 6 }}
+        {{- toYaml . | nindent 6 }}
       {{- end }}
-      {{- if .Values.controller.initContainers }}
+      {{- with .Values.controller.initContainers }}
       initContainers:
-      {{- toYaml .Values.controller.initContainers | nindent 6 }}
+        {{- toYaml . | nindent 6 }}
+      {{- end }}
+      {{- with .Values.controller.priorityClassName }}
+      priorityClassName: {{ . }}
       {{- end }}
-{{- if .Values.controller.priorityClassName }}
-      priorityClassName: {{ .Values.controller.priorityClassName }}
-{{- end }}

charts/argo-cd/values.yaml

@@ -119,7 +119,7 @@ controller:
     imagePullPolicy: ""
 
   # -- The number of application controller pods to run.
-  # If changing the number of replicas you must pass the number as `ARGOCD_CONTROLLER_REPLICAS` as an environment variable
+  # Additional replicas will cause sharding of managed clusters across number of replicas.
   replicas: 1
 
   ## Application controller commandline flags
@@ -146,10 +146,7 @@ controller:
   extraArgs: []
 
   # -- Environment variables to pass to application controller
-  env:
-    []
-    # - name: "ARGOCD_CONTROLLER_REPLICAS"
-    #   value: ""
+  env: []
 
   # -- envFrom to pass to application controller
   # @default -- `[]` (See [values.yaml])