osd: add 'rotate-stored-key' asok command

This writes the key to the osd_key in the block device label.

Signed-off-by: Sage Weil <[email protected]>

src/osd/OSD.cc

@@ -2794,6 +2794,8 @@ will start to track new ops received afterwards.";
     store->generate_db_histogram(f);
   } else if (prefix == "flush_store_cache") {
     store->flush_cache(&ss);
+  } else if (prefix == "rotate-stored-key") {
+    store->write_meta("osd_key", inbl.to_str());
   } else if (prefix == "dump_pgstate_history") {
     f->open_object_section("pgstate_history");
     f->open_array_section("pgs");
@@ -3987,6 +3989,10 @@ void OSD::final_init()
                                      asok_hook,
                                      "Flush bluestore internal cache");
   ceph_assert(r == 0);
+  r = admin_socket->register_command("rotate-stored-key",
+                                     asok_hook,
+                                     "Update the stored osd_key");
+  ceph_assert(r == 0);
   r = admin_socket->register_command("dump_pgstate_history",
 				     asok_hook,
 				     "show recent state history");