ceph: wait for maps before doing 'ceph tell ... help'

If we don't have a mgrmap yet (usually we do, but it's racy) MgrClient
will assume EACCES if we try to send a command.  This can lead to
EACCES from 'ceph tell mgr help'.

The mon sends maps in alphanumeric order, so waiting for osdmap will
include mgrmap and fsmap.  That's everything (current) except servicemap,
but we can't 'tell' those anyway.

Fixes: http://tracker.ceph.com/issues/20113
Signed-off-by: Sage Weil <sage@redhat.com>

diff --git a/src/ceph.in b/src/ceph.in
index e34c468a7e92dbfa1f68de9f09bb718f59d2a6dc..bb2516c788f9953cccba5d71498f3c288dce4432 100755 (executable)
--- a/src/ceph.in
+++ b/src/ceph.in
@@ -355,6 +355,9 @@ def do_extended_help(parser, args, target, partial):
                          partial=partial))
 
     def help_for_target(target, partial=None):
+        # wait for osdmap because we know this is sent after the mgrmap
+        # and monmap (it's alphabetical).
+        cluster_handle.wait_for_latest_osdmap()
         ret, outbuf, outs = json_command(cluster_handle, target=target,
                                          prefix='get_command_descriptions',
                                          timeout=10)