mon: trim old auth states

These aren't exposed outside the monitor, so we really only keep them
around to assist in mon recovery.  Give ourselves a healthy margin over
the max join drift for that.

Fixes: #2000
Signed-off-by: Sage Weil <sage.weil@dreamhost.com>

1 files changed, 5 insertions, 0 deletions

diff --git a/src/mon/AuthMonitor.cc b/src/mon/AuthMonitor.cc
index ff475889cea..6cc002f8662 100644
--- a/src/mon/AuthMonitor.cc
+++ b/src/mon/AuthMonitor.cc
@@ -186,6 +186,11 @@ bool AuthMonitor::update_from_paxos()
   ::encode(mon->key_server, bl);
   paxos->stash_latest(paxosv, bl);
 
+  unsigned max = g_conf->paxos_max_join_drift * 2;
+  if (mon->is_leader() &&
+      paxosv > max)
+    paxos->trim_to(paxosv - max);
+
   return true;
 }