feat(argo-cd): Add Repo Server strict TLS cert support (#1673)

Signed-off-by: Karl Parry <karl.parry@imbursepayments.com>

charts/argo-cd/Chart.yaml

@@ -3,7 +3,7 @@ appVersion: v2.5.3
 kubeVersion: ">=1.22.0-0"
 description: A Helm chart for Argo CD, a declarative, GitOps continuous delivery tool for Kubernetes.
 name: argo-cd
-version: 5.14.3
+version: 5.15.0
 home: https://github.com/argoproj/argo-helm
 icon: https://argo-cd.readthedocs.io/en/stable/assets/logo.png
 sources:
@@ -23,4 +23,4 @@ dependencies:
     condition: redis-ha.enabled
 annotations:
   artifacthub.io/changes: |
-    - "[Changed]: Update to app version 2.5.3"
+    - "[Added]: Ability to deploy argocd-repo-server-server-tls secret and configure Strict TLS for Repo Server"

charts/argo-cd/README.md

@@ -522,6 +522,12 @@ NAME: my-release
 | repoServer.autoscaling.minReplicas | int | `1` | Minimum number of replicas for the repo server [HPA] |
 | repoServer.autoscaling.targetCPUUtilizationPercentage | int | `50` | Average CPU utilization percentage for the repo server [HPA] |
 | repoServer.autoscaling.targetMemoryUtilizationPercentage | int | `50` | Average memory utilization percentage for the repo server [HPA] |
+| repoServer.certificateSecret.annotations | object | `{}` | Annotations to be added to argocd-repo-server-tls secret |
+| repoServer.certificateSecret.ca | string | `""` | Certificate authority. Required for self-signed certificates. |
+| repoServer.certificateSecret.crt | string | `""` | Certificate data. Must contain SANs of Repo service (ie: argocd-repo-server, argocd-repo-server.argo-cd.svc) |
+| repoServer.certificateSecret.enabled | bool | `false` | Create argocd-repo-server-tls secret |
+| repoServer.certificateSecret.key | string | `""` | Certificate private key |
+| repoServer.certificateSecret.labels | object | `{}` | Labels to be added to argocd-repo-server-tls secret |
 | repoServer.clusterAdminAccess.enabled | bool | `false` | Enable RBAC for local cluster deployments |
 | repoServer.clusterRoleRules.enabled | bool | `false` | Enable custom rules for the Repo server's Cluster Role resource |
 | repoServer.clusterRoleRules.rules | list | `[]` | List of custom rules for the Repo server's Cluster Role resource |

charts/argo-cd/templates/_helpers.tpl

@@ -194,6 +194,7 @@ Argo Params Default Configuration Presets
 */}}
 {{- define "argo-cd.config.params.presets" -}}
 repo.server: "{{ include "argo-cd.repoServer.fullname" . }}:{{ .Values.repoServer.service.port }}"
+server.repo.server.strict.tls: {{ .Values.repoServer.certificateSecret.enabled | toString }}
 {{- with include "argo-cd.redis.server" . }}
 redis.server: {{ . | quote }}
 {{- end }}

charts/argo-cd/templates/argocd-configs/argocd-repo-server-tls.yaml

@@ -0,0 +1,24 @@
+{{- if and .Values.repoServer.enabled .Values.repoServer.certificateSecret.enabled }}
+apiVersion: v1
+kind: Secret
+metadata:
+  name: argocd-repo-server-tls
+  labels:
+    {{- include "argo-cd.labels" (dict "context" . "component" .Values.repoServer.name "name" "repo-server-tls") | nindent 4 }}
+    {{- with .Values.repoServer.certificateSecret.labels }}
+      {{- toYaml . | nindent 4 }}
+    {{- end }}
+  {{- with .Values.repoServer.certificateSecret.annotations }}
+  annotations:
+    {{- range $key, $value := . }}
+    {{ $key }}: {{ $value | quote }}
+    {{- end }}
+  {{- end }}
+type: kubernetes.io/tls
+data:
+  {{- with .Values.repoServer.certificateSecret.ca }}
+  ca.crt: {{ . | b64enc | quote }}
+  {{- end }}
+  tls.crt: {{ .Values.repoServer.certificateSecret.crt | b64enc | quote }}
+  tls.key: {{ .Values.repoServer.certificateSecret.key | b64enc | quote }}
+{{- end }}

charts/argo-cd/values.yaml

@@ -1982,6 +1982,23 @@ repoServer:
   #    cpu: 10m
   #    memory: 64Mi
 
+  # TLS certificate configuration via Secret
+  ## Ref: https://argo-cd.readthedocs.io/en/stable/operator-manual/tls/#configuring-tls-to-argocd-repo-server
+  ## Note: Issuing certificates via cert-manager in not supported right now because it's not possible to restart repo server automatically without extra controllers.
+  certificateSecret:
+    # -- Create argocd-repo-server-tls secret
+    enabled: false
+    # -- Annotations to be added to argocd-repo-server-tls secret
+    annotations: {}
+    # -- Labels to be added to argocd-repo-server-tls secret
+    labels: {}
+    # -- Certificate authority. Required for self-signed certificates.
+    ca: ''
+    # -- Certificate private key
+    key: ''
+    # -- Certificate data. Must contain SANs of Repo service (ie: argocd-repo-server, argocd-repo-server.argo-cd.svc)
+    crt: ''
+
   ## Repo server service configuration
   service:
     # -- Repo server service annotations