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authorAvra Sengupta <asengupt@redhat.com>2015-06-09 18:00:57 +0530
committerKrishnan Parthasarathi <kparthas@redhat.com>2015-06-11 00:08:17 -0700
commit71f27128cb9e842fe5b0b9aa05e21fdc8147f52e (patch)
tree3ed99a369a0e3d7195b0531b75e35840e630a8a4 /extras/snap_scheduler
parentfefc8730e2a87db41d5f79c9853a14cab86715e5 (diff)
snapshot/scheduler: Reload /etc/cron.d/glusterfs_snap_cron_tasks when shared storage is available
If shared storage is not accessible, create a flag in /var/run/gluster/ So that when /etc/cron.d/glusterfs_snap_cron_tasks is available again, the flag will tell us, to reload /etc/cron.d/glusterfs_snap_cron_tasks Change-Id: I41b19f57ff0b8f7e0b820eaf592b0fdedb0a5d86 BUG: 1218573 Signed-off-by: Avra Sengupta <asengupt@redhat.com> Reviewed-on: http://review.gluster.org/11139 Tested-by: NetBSD Build System <jenkins@build.gluster.org> Reviewed-by: Rajesh Joseph <rjoseph@redhat.com> Reviewed-by: Krishnan Parthasarathi <kparthas@redhat.com>
Diffstat (limited to 'extras/snap_scheduler')
-rwxr-xr-xextras/snap_scheduler/gcron.py33
1 files changed, 33 insertions, 0 deletions
diff --git a/extras/snap_scheduler/gcron.py b/extras/snap_scheduler/gcron.py
index a21c40f894f..d72057861ff 100755
--- a/extras/snap_scheduler/gcron.py
+++ b/extras/snap_scheduler/gcron.py
@@ -21,6 +21,7 @@ import fcntl
GCRON_TASKS = "/var/run/gluster/shared_storage/snaps/glusterfs_snap_cron_tasks"
GCRON_CROND_TASK = "/etc/cron.d/glusterfs_snap_cron_tasks"
+GCRON_RELOAD_FLAG = "/var/run/gluster/crond_task_reload_flag"
LOCK_FILE_DIR = "/var/run/gluster/shared_storage/snaps/lock_files/"
log = logging.getLogger("gcron-logger")
start_time = 0.0
@@ -121,9 +122,41 @@ def main():
global start_time
if sys.argv[1] == "--update":
if not os.path.exists(GCRON_TASKS):
+ # Create a flag in /var/run/gluster which indicates that this nodes
+ # doesn't have access to GCRON_TASKS right now, so that
+ # when the mount is available and GCRON_TASKS is available
+ # the flag will tell this routine to reload GCRON_CROND_TASK
+ try:
+ f = os.open(GCRON_RELOAD_FLAG, os.O_CREAT | os.O_NONBLOCK, 0644)
+ os.close(f)
+ except OSError as (errno, strerror):
+ if errno != EEXIST:
+ log.error("Failed to create %s : %s",
+ GCRON_RELOAD_FLAG, strerror)
+ output("Failed to create %s. Error: %s"
+ % (GCRON_RELOAD_FLAG, strerror))
return
+
if not os.path.exists(GCRON_CROND_TASK):
return
+
+ # As GCRON_TASKS exists now, we should check if GCRON_RELOAD_FLAG
+ # also exists. If so we should touch GCRON_CROND_TASK and remove
+ # the GCRON_RELOAD_FLAG
+ if os.path.exists(GCRON_RELOAD_FLAG):
+ try:
+ os.remove(GCRON_RELOAD_FLAG);
+ process = subprocess.Popen(["touch", "-h", GCRON_CROND_TASK],
+ stdout=subprocess.PIPE,
+ stderr=subprocess.PIPE)
+ out, err = process.communicate()
+ if process.returncode != 0:
+ log.error("Failed to touch %s. Error: %s.",
+ GCRON_CROND_TASK, err)
+ except (IOError, OSError) as (errno, strerror):
+ log.error("Failed to touch %s. Error: %s.",
+ GCRON_CROND_TASK, strerror)
+ return
if os.lstat(GCRON_TASKS).st_mtime > \
os.lstat(GCRON_CROND_TASK).st_mtime:
try: