From: Mykola Golub <mgolub@mirantis.com>
Date: Tue, 29 Nov 2016 09:40:14 +0000 (+0200)
Subject: rbd-mirror: split-brain issues should be clearly visible in mirror status
X-Git-Tag: v10.2.6~96^2~3
X-Git-Url: http://git-server-git.apps.pok.os.sepia.ceph.com/?a=commitdiff_plain;h=e34a403df5e247b0937abee617758e0838fc0c8e;p=ceph.git

rbd-mirror: split-brain issues should be clearly visible in mirror status

Fixed: http://tracker.ceph.com/issues/16991
Signed-off-by: Mykola Golub <mgolub@mirantis.com>
(cherry picked from commit cccca67d5f898c43207a19a6e029a1abb86efbcb)
---

diff --git a/qa/workunits/rbd/rbd_mirror.sh b/qa/workunits/rbd/rbd_mirror.sh
index 396600baa6fb..983d25775f58 100755
--- a/qa/workunits/rbd/rbd_mirror.sh
+++ b/qa/workunits/rbd/rbd_mirror.sh
@@ -343,4 +343,16 @@ test -z "$(get_mirror_position ${CLUSTER2} ${POOL} ${image})"
 wait_for_image_replay_stopped ${CLUSTER1} ${POOL} ${image}
 wait_for_status_in_pool_dir ${CLUSTER1} ${POOL} ${image} 'up+error' 'disconnected'
 
+testlog "TEST: split-brain"
+image=split-brain
+create_image ${CLUSTER2} ${POOL} ${image}
+wait_for_status_in_pool_dir ${CLUSTER1} ${POOL} ${image} 'up+replaying' 'master_position'
+demote_image ${CLUSTER2} ${POOL} ${image}
+wait_for_status_in_pool_dir ${CLUSTER1} ${POOL} ${image} 'up+stopped'
+promote_image ${CLUSTER1} ${POOL} ${image}
+write_image ${CLUSTER1} ${POOL} ${image} 10
+demote_image ${CLUSTER1} ${POOL} ${image}
+promote_image ${CLUSTER2} ${POOL} ${image}
+wait_for_status_in_pool_dir ${CLUSTER1} ${POOL} ${image} 'up+error' 'split-brain'
+
 echo OK
diff --git a/src/tools/rbd_mirror/ImageReplayer.cc b/src/tools/rbd_mirror/ImageReplayer.cc
index f83eafb7c2a3..eaa40928ad66 100644
--- a/src/tools/rbd_mirror/ImageReplayer.cc
+++ b/src/tools/rbd_mirror/ImageReplayer.cc
@@ -428,6 +428,9 @@ void ImageReplayer<I>::handle_bootstrap(int r) {
     dout(5) << "remote image is non-primary or local image is primary" << dendl;
     on_start_fail(0, "remote image is non-primary or local image is primary");
     return;
+  } else if (r == -EEXIST) {
+    on_start_fail(r, "split-brain detected");
+    return;
   } else if (r < 0) {
     on_start_fail(r, "error bootstrapping replay");
     return;