qa: test_rbdmap_RBDMAPFILE.sh workunit

Before a7a3658 the rbdmap script was logging bogus messages and not working
on systemd platforms because the unit file was not defining the RBDMAPFILE
environment variable.

This workunit asserts that the bug has been fixed.

http://tracker.ceph.com/issues/14984 References: #14984

Signed-off-by: Nathan Cutler <ncutler@suse.com>

qa/workunits/rbd/test_rbdmap_RBDMAPFILE.sh

@@ -0,0 +1,37 @@
+#!/bin/sh
+#
+# Regression test for http://tracker.ceph.com/issues/14984
+#
+# When the bug is present, starting the rbdmap service causes
+# a bogus log message to be emitted to the log because the RBDMAPFILE
+# environment variable is not set.
+#
+# When the bug is not present, starting the rbdmap service will
+# not show up in the log, because /etc/ceph/rbdmap does not contain
+# any lines that require processing.
+#
+set -ex
+
+which ceph-detect-init >/dev/null || exit 1
+[ "$(ceph-detect-init)" = "systemd" ] || exit 0
+
+echo "TEST: save timestamp for use later with journalctl --since"
+TIMESTAMP=$(date +%Y-%m-%d\ %H:%M:%S)
+
+echo "TEST: assert that rbdmap has not logged anything since boot"
+journalctl -b 0 -t rbdmap | grep 'rbdmap\[[[:digit:]]' && exit 1
+journalctl -b 0 -t init-rbdmap | grep 'rbdmap\[[[:digit:]]' && exit 1
+
+echo "TEST: restart the rbdmap.service"
+sudo systemctl restart rbdmap.service
+
+echo "TEST: ensure that /usr/bin/rbdmap runs to completion"
+until sudo systemctl status rbdmap.service | grep 'active (exited)' ; do 
+    sleep 0.5
+done
+
+echo "TEST: assert that rbdmap has not logged anything since TIMESTAMP"
+journalctl --since "$TIMESTAMP" -t rbdmap  | grep 'rbdmap\[[[:digit:]]' && exit 1
+journalctl --since "$TIMESTAMP" -t init-rbdmap | grep 'rbdmap\[[[:digit:]]' && exit 1
+
+exit 0

src/rbdmap

@@ -1,5 +1,8 @@
 #!/bin/sh
 
+# save PID in temporary file (used by regression test)
+echo $$ > /tmp/rbdmap.pid
+
 do_map() {
 
         # default to reasonable value if RBDMAPFILE not set in environment