helm: fix admin secret template paths and remove duplicate (#7690)

* add admin and worker to helm charts

* workers are stateless, admin is stateful

* removed the duplicate admin-deployment.yaml

* address comments

* address comments

* purge

* Update README.md

* Update k8s/charts/seaweedfs/templates/admin/admin-ingress.yaml

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

* address comments

* address comments

* supports Kubernetes versions from v1.14 to v1.30+, ensuring broad compatibility

* add probe for workers

* address comments

* add a todo

* chore: trigger CI

* use port name for probes in admin statefulset

* add secrets to admin helm chart

* fix error .Values.admin.secret.existingSecret

* helm: fix admin secret template paths and remove duplicate

- Fix value paths to use .Values.admin.secret.existingSecret instead of .Values.existingSecret
- Use templated secret name {{ template "seaweedfs.name" . }}-admin-secret
- Add .Values.admin.enabled check to admin-secret.yaml
- Remove duplicate admin-secret.yaml from templates/ root

* helm: address PR review feedback

- Only pass adminUser/adminPassword args when auth is enabled (fixes regression)
- Use $adminSecretName variable to reduce duplication (DRY)
- Only create admin-secret when adminPassword is set
- Add documentation comments for existingSecret, userKey, pwKey fields
- Clarify that empty adminPassword disables authentication

* helm: quote admin credentials to handle spaces

* helm: fix yaml lint errors (comment spacing, trailing blank line)

* helm: add validation for existingSecret requiring userKey and pwKey

---------

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>
Co-authored-by: Ubuntu <morez.martin@gmail.com>

k8s/charts/seaweedfs/values.yaml

@@ -1099,10 +1099,15 @@ admin:
   loggingOverrideLevel: null
 
   # Admin authentication
-  # Note: Avoid special shell characters in password ($ \ " ' ( ) [ ] { } ; | & < >)
-  # For production, consider using Kubernetes Secrets (future enhancement)
-  adminUser: "admin"
-  adminPassword: ""  # If empty, auth is disabled
+  secret:
+    # Name of an existing secret containing admin credentials. If set, adminUser and adminPassword below are ignored.
+    existingSecret: ""
+    # Key in the existing secret for the admin username. Required if existingSecret is set.
+    userKey: ""
+    # Key in the existing secret for the admin password. Required if existingSecret is set.
+    pwKey: ""
+    adminUser: "admin"
+    adminPassword: ""  # If empty, authentication is disabled.
 
   # Data directory for admin configuration and maintenance data
   dataDir: ""  # If empty, configuration is kept in memory only
@@ -1226,9 +1231,9 @@ worker:
   adminServer: ""
 
   # Worker capabilities - comma-separated list
-  # Available: vacuum, balance, ec (erasure_coding)
-  # Default: "vacuum,ec,balance"
-  capabilities: "vacuum,ec,balance"
+  # Available: vacuum, balance, erasure_coding
+  # Default: "vacuum,balance,erasure_coding" (all capabilities)
+  capabilities: "vacuum,balance,erasure_coding"
 
   # Maximum number of concurrent tasks
   maxConcurrent: 3