volume: Add the missing option propagation_mode (#15626)

.changelog/15626.txt

@@ -0,0 +1,3 @@
+```release-note:bug
+fix: Add the missing option propagation_mode for volume_mount
+```

client/allocrunner/taskrunner/volume_hook.go

@@ -91,6 +91,7 @@ func (h *volumeHook) hostVolumeMountConfigurations(taskMounts []*structs.VolumeM
 			HostPath:        hostVolume.Path,
 			TaskPath:        m.Destination,
 			Readonly:        hostVolume.ReadOnly || req.ReadOnly || m.ReadOnly,
+			PropagationMode: m.PropagationMode,
 		}
 		mounts = append(mounts, mcfg)
 	}
@@ -183,6 +184,7 @@ func (h *volumeHook) prepareCSIVolumes(req *interfaces.TaskPrestartRequest, volu
 				HostPath:        csiMountPoint.Source,
 				TaskPath:        m.Destination,
 				Readonly:        request.ReadOnly || m.ReadOnly,
+				PropagationMode: m.PropagationMode,
 			}
 			mounts = append(mounts, mcfg)
 		}

website/content/docs/job-specification/volume_mount.mdx

@@ -26,6 +26,7 @@ job "docs" {
       volume_mount {
         volume      = "certs"
         destination = "/etc/ssl/certs"
+        propagation_mode = "private"
       }
     }
   }