feat(helm): add volume.rust toggle to run the Rust volume server (#9618)

feat(helm): add volume.rust to run the Rust volume server

When set, the volume statefulset execs /usr/bin/weed-volume instead of
'weed volume', dropping the Go-only -logtostderr/-logdir/-v flags and the
'volume' subcommand. All shared flags and extraArgs carry over unchanged.

k8s/charts/seaweedfs/templates/volume/volume-statefulset.yaml

@@ -137,6 +137,9 @@ spec:
             - "/bin/sh"
             - "-ec"
             - |
+              {{- if $volume.rust }}
+              exec /usr/bin/weed-volume \
+              {{- else }}
               exec /usr/bin/weed \
                 {{- if $volume.logs }}
                 -logdir=/logs \
@@ -149,6 +152,7 @@ spec:
                 -v={{ $.Values.global.seaweedfs.loggingLevel }} \
                 {{- end }}
                 volume \
+              {{- end }}
                 -port={{ $volume.port }} \
                 {{- if $volume.metricsPort }}
                 -metricsPort={{ $volume.metricsPort }} \
@@ -180,7 +184,7 @@ spec:
                 {{- if $volume.imagesFixOrientation }}
                 -images.fix.orientation \
                 {{- end }}
-                {{- if $volume.pulseSeconds }}
+                {{- if and $volume.pulseSeconds (not $volume.rust) }}
                 -pulseSeconds={{ $volume.pulseSeconds }} \
                 {{- end }}
                 {{- if $volume.index }}

k8s/charts/seaweedfs/values.yaml

@@ -305,6 +305,11 @@ volume:
   enabled: true
   imageOverride: null
   restartPolicy: null
+  # Run the Rust volume server (/usr/bin/weed-volume) instead of the Go one.
+  # Requires an image that ships the Rust binary (amd64/arm64). The Go-only
+  # log flags (-logtostderr/-logdir/-v) and -pulseSeconds are dropped; set log
+  # level via the RUST_LOG env var in extraEnvironmentVars if needed.
+  rust: false
   port: 8080
   grpcPort: 18080
   metricsPort: 9327