internal/util: Add a wrapper to return server version as a string

Signed-off-by: Anoop C S <[email protected]>

Author: anoopcs9

Diff for: internal/util/util.go

@@ -16,12 +16,33 @@ const (
 	CephUnknown
 )
 
+// List of known CephVersion strings
+const (
+	Nautilus = "nautilus"
+	Octopus  = "octopus"
+	Pacific  = "pacific"
+	Quincy   = "quincy"
+	Reef     = "reef"
+	Squid    = "squid"
+	Tentacle = "tentacle"
+	Main     = "main"
+)
+
 // CurrentCephVersion is the current Ceph version
 func CurrentCephVersion() CephVersion {
 	vname := os.Getenv("CEPH_VERSION")
 	return CephVersionOfString(vname)
 }
 
+// CurrentCephVersionString is the current Ceph version string
+func CurrentCephVersionString() string {
+	switch vname := os.Getenv("CEPH_VERSION"); vname {
+	case Nautilus, Octopus, Pacific, Quincy, Reef, Squid, Tentacle, Main:
+		return vname
+	}
+	return ""
+}
+
 // CephVersionOfString converts a string to CephVersion
 func CephVersionOfString(vname string) CephVersion {
 	switch vname {