cephfs: support omap data store in radosnamespace via cli argument

Signed-off-by: Andreas <zerotens@users.noreply.github.com>

PendingReleaseNotes.md

@@ -8,5 +8,6 @@
 - deploy: podSecurityContexts can be configured for ceph-csi-rbd chart in [PR](https://github.com/ceph/ceph-csi/pull/4668)
 - deploy: instanceID can be optionally configured for ceph-csi charts in [PR](https://github.com/ceph/ceph-csi/pull/4666)
 - rbd: add support for flattenMode option for replication in [PR](https://github.com/ceph/ceph-csi/pull/4678)
+- cephfs: support omap data store in radosnamespace via cli argument in [PR](https://github.com/ceph/ceph-csi/pull/4652)
 
 ## NOTE

cmd/cephcsi.go

@@ -100,6 +100,11 @@ func init() {
 		"kernelmountoptions",
 		"",
 		"Comma separated string of mount options accepted by cephfs kernel mounter")
+	flag.StringVar(
+		&conf.RadosNamespaceCephFS,
+		"radosnamespacecephfs",
+		"",
+		"CephFS RadosNamespace used to store CSI specific objects and keys.")
 	flag.StringVar(
 		&conf.FuseMountOptions,
 		"fusemountoptions",

docs/deploy-cephfs.md

@@ -49,6 +49,7 @@ make image-cephcsi
 | `--domainlabels`          | _empty_                     | Kubernetes node labels to use as CSI domain labels for topology aware provisioning, should be a comma separated value (ex:= "failure-domain/region,failure-domain/zone")                                                                                                             |
 | `--enable-read-affinity` | `false`                       | enable read affinity                                                                                                                                                                                                                                                                 |
 | `--crush-location-labels`| _empty_                       | Kubernetes node labels that determine the CRUSH location the node belongs to, separated by ','.<br>`Note: These labels will be replaced if crush location labels are defined in the ceph-csi-config ConfigMap for the specific cluster.`                                                                                                                                                                                       |
+| `--radosnamespacecephfs`| _empty_                       | CephFS RadosNamespace used to store CSI specific objects and keys.                                                                                                                               |
 
 **NOTE:** The parameter `-forcecephkernelclient` enables the Kernel
 CephFS mounter on kernels < 4.17.

internal/cephfs/driver.go

@@ -110,6 +110,11 @@ func (fs *Driver) Run(conf *util.Config) {
 		CSIInstanceID = conf.InstanceID
 	}
 
+	// Use passed in radosNamespace, if provided for storing CSI specific objects and keys.
+	if conf.RadosNamespaceCephFS != "" {
+		fsutil.RadosNamespace = conf.RadosNamespaceCephFS
+	}
+
 	if conf.IsNodeServer && k8s.RunsOnKubernetes() {
 		nodeLabels, err = k8s.GetNodeLabels(conf.NodeID)
 		if err != nil {

internal/cephfs/util/util.go

@@ -19,7 +19,5 @@ package util
 // VolumeID string representation.
 type VolumeID string
 
-const (
-	// RadosNamespace to store CSI specific objects and keys.
-	RadosNamespace = "csi"
-)
+// RadosNamespace to store CSI specific objects and keys.
+var RadosNamespace = "csi"

internal/util/util.go

@@ -142,9 +142,9 @@ type Config struct {
 	SkipForceFlatten bool
 
 	// cephfs related flags
-	ForceKernelCephFS bool // force to use the ceph kernel client even if the kernel is < 4.17
-
-	SetMetadata bool // set metadata on the volume
+	ForceKernelCephFS    bool   // force to use the ceph kernel client even if the kernel is < 4.17
+	RadosNamespaceCephFS string // RadosNamespace used to store CSI specific objects and keys
+	SetMetadata          bool   // set metadata on the volume
 
 	// Read affinity related options
 	EnableReadAffinity  bool   // enable OSD read affinity.