snapshot/eventsapi: Integrate snapshot events with eventsapi

1. EVENT_SNAPSHOT_CREATED : snapshot_name=snap1 volume_name=test_vol
                            snapshot_uuid=26dd6c52-6021-40b1-a507-001a80401d70
2. EVENT_SNAPSHOT_CREATE_FAILED : snapshot_name=snap1 volume_name=test_vol
                                  error=Snapshot snap1 already exists
3. EVENT_SNAPSHOT_ACTIVATED : snapshot_name=snap1
                              snapshot_uuid=26dd6c52-6021-40b1-a507-001a80401d70
4. EVENT_SNAPSHOT_ACTIVATE_FAILED: snapshot_name=snap1
                                   error=Snapshot snap1 is already activated.
5. EVENT_SNAPSHOT_DEACTIVATED : snapshot_name=snap1
                              snapshot_uuid=26dd6c52-6021-40b1-a507-001a80401d70
6. EVENT_SNAPSHOT_DEACTIVATE_FAILED : snapshot_name=snap3
                                      error=Snapshot (snap3) does not exist.
7. EVENT_SNAPSHOT_SOFT_LIMIT_REACHED : volume_name=test_vol
                                  volume_id=2ace2616-5591-4b9b-be2a-38592dda5758
8. EVENT_SNAPSHOT_HARD_LIMIT_REACHED : volume_name=test_vol
                                  volume_id=2ace2616-5591-4b9b-be2a-38592dda5758
9. EVENT_SNAPSHOT_RESTORED : snapshot_name=snap1 volume_name=test_vol
                             snapshot_uuid=3a840ec5-08da-4f2b-850d-1d5539a5d14d
10. EVENT_SNAPSHOT_RESTORE_FAILED : snapshot_name=snap10
                                    error=Snapshot (snap10) does not exist
11. EVENT_SNAPSHOT_DELETED : snapshot_name=snap1
                             snapshot_uuid=d9ff3d4f-f579-4345-a4da-4f9353f0950c
12. EVENT_SNAPSHOT_DELETE_FAILED : snapshot_name=snap2
                                   error=Snapshot (snap2) does not exist
13. EVENT_SNAPSHOT_CLONED : clone_uuid=93ba9f06-cb9c-4ace-aa52-2616e7f31022
                            snapshot_name=snap1 clone_name=clone2
14. EVENT_SNAPSHOT_CLONE_FAILED : snapshot_name=snap1 clone_name=clone2
                                  error=Volume with name:clone2 already exists
15. EVENT_SNAPSHOT_CONFIG_UPDATED : auto-delete=enable config_type=system_config
                                    config_type=volume_config hard_limit=100
16. EVENT_SNAPSHOT_CONFIG_UPDATE_FAILED :
                   error=Invalid snap-max-soft-limit 110. Expected range 1 - 100
17. EVENT_SNAPSHOT_SCHEDULER_INITIALISED : status=Success
18. EVENT_SNAPSHOT_SCHEDULER_INIT_FAILED
19. EVENT_SNAPSHOT_SCHEDULER_ENABLED : status=Successfuly Enabled
20. EVENT_SNAPSHOT_SCHEDULER_ENABLE_FAILED :
                                   error=Snapshot scheduler is already enabled.
21. EVENT_SNAPSHOT_SCHEDULER_SCHEDULE_ADDED : status=Successfuly added job job1
22. EVENT_SNAPSHOT_SCHEDULER_SCHEDULE_ADD_FAILED :
                    status=Failed to add job job1 error=The job already exists.
23. EVENT_SNAPSHOT_SCHEDULER_SCHEDULE_EDITED :
                                             status=Successfuly edited job job1
24. EVENT_SNAPSHOT_SCHEDULER_SCHEDULE_EDIT_FAILED :
                                                 status=Failed to edit job job2
                                                 error=The job cannot be found.
25. EVENT_SNAPSHOT_SCHEDULER_SCHEDULE_DELETED :
                                            status=Successfuly deleted job job1
26. EVENT_SNAPSHOT_SCHEDULER_SCHEDULE_DELETE_FAILED :
                                               status=Failed to delete job job1
                                               error=The job cannot be found.
27. EVENT_SNAPSHOT_SCHEDULER_DISABLED : status=Successfuly Disabled
28. EVENT_SNAPSHOT_SCHEDULER_DISABLE_FAILED :
                                   error=Snapshot scheduler is already disabled.

Change-Id: I3479cc3fb7af3c76ded67cf289f99547d0a55d21
BUG: 1370567
Signed-off-by: Avra Sengupta <asengupt@redhat.com>
Reviewed-on: http://review.gluster.org/15329
Tested-by: Aravinda VK <avishwan@redhat.com>
Smoke: Gluster Build System <jenkins@build.gluster.org>
NetBSD-regression: NetBSD Build System <jenkins@build.gluster.org>
CentOS-regression: Gluster Build System <jenkins@build.gluster.org>
Reviewed-by: Rajesh Joseph <rjoseph@redhat.com>

3 files changed, 89 insertions, 3 deletions

diff --git a/extras/snap_scheduler/Makefile.am b/extras/snap_scheduler/Makefile.am
index 896595f1504..ffc157935a3 100644
--- a/extras/snap_scheduler/Makefile.am
+++ b/extras/snap_scheduler/Makefile.am
@@ -1,7 +1,7 @@
 snap_schedulerdir = $(sbindir)/
 
-snap_scheduler_SCRIPTS = gcron.py snap_scheduler.py
+snap_scheduler_SCRIPTS = gcron.py snap_scheduler.py conf.py
 
-EXTRA_DIST = gcron.py snap_scheduler.py
+EXTRA_DIST = gcron.py snap_scheduler.py conf.py
 
 CLEANFILES =
diff --git a/extras/snap_scheduler/conf.py.in b/extras/snap_scheduler/conf.py.in
new file mode 100644
index 00000000000..6dcca0534a7
--- /dev/null
+++ b/extras/snap_scheduler/conf.py.in
@@ -0,0 +1,11 @@
+#
+# Copyright (c) 2016 Red Hat, Inc. <http://www.redhat.com>
+# This file is part of GlusterFS.
+
+# This file is licensed to you under your choice of the GNU Lesser
+# General Public License, version 3 or any later version (LGPLv3 or
+# later), or the GNU General Public License, version 2 (GPLv2), in all
+# cases as published by the Free Software Foundation.
+#
+
+GLUSTERFS_LIBEXECDIR = '@GLUSTERFS_LIBEXECDIR@'
diff --git a/extras/snap_scheduler/snap_scheduler.py b/extras/snap_scheduler/snap_scheduler.py
index af092e2c341..23d5aa3b525 100755
--- a/extras/snap_scheduler/snap_scheduler.py
+++ b/extras/snap_scheduler/snap_scheduler.py
@@ -19,7 +19,10 @@ import logging.handlers
 import sys
 import shutil
 from errno import EEXIST
-
+from conf import GLUSTERFS_LIBEXECDIR
+sys.path.insert(1, GLUSTERFS_LIBEXECDIR)
+from events.gf_event import gf_event
+from events import eventtypes
 
 SCRIPT_NAME = "snap_scheduler"
 scheduler_enabled = False
@@ -55,6 +58,42 @@ INVALID_SCHEDULE = 15
 INVALID_ARG = 16
 VOLUME_DOES_NOT_EXIST = 17
 
+def print_error (error_num):
+    if error_num == INTERNAL_ERROR:
+        return "Internal Error"
+    elif error_num == SHARED_STORAGE_DIR_DOESNT_EXIST:
+        return "The shared storage directory ("+SHARED_STORAGE_DIR+")" \
+               " does not exist."
+    elif error_num == SHARED_STORAGE_NOT_MOUNTED:
+        return "The shared storage directory ("+SHARED_STORAGE_DIR+")" \
+               " is not mounted."
+    elif error_num == ANOTHER_TRANSACTION_IN_PROGRESS:
+        return "Another transaction is in progress."
+    elif error_num == INIT_FAILED:
+        return "Initialisation failed."
+    elif error_num == SCHEDULING_ALREADY_DISABLED:
+        return "Snapshot scheduler is already disabled."
+    elif error_num == SCHEDULING_ALREADY_ENABLED:
+        return "Snapshot scheduler is already enabled."
+    elif error_num == NODE_NOT_INITIALISED:
+        return "The node is not initialised."
+    elif error_num == ANOTHER_SCHEDULER_ACTIVE:
+        return "Another scheduler is active."
+    elif error_num == JOB_ALREADY_EXISTS:
+        return "The job already exists."
+    elif error_num == JOB_NOT_FOUND:
+        return "The job cannot be found."
+    elif error_num == INVALID_JOBNAME:
+        return "The job name is invalid."
+    elif error_num == INVALID_VOLNAME:
+        return "The volume name is invalid."
+    elif error_num == INVALID_SCHEDULE:
+        return "The schedule is invalid."
+    elif error_num == INVALID_ARG:
+        return "The argument is invalid."
+    elif error_num == VOLUME_DOES_NOT_EXIST:
+        return "The volume does not exist."
+
 def output(msg):
     print("%s: %s" % (SCRIPT_NAME, msg))
 
@@ -499,6 +538,7 @@ def initialise_scheduler():
 
     log.info("Successfully initialised snapshot scheduler for this node")
     output("Successfully initialised snapshot scheduler for this node")
+    gf_event (eventtypes.SNAPSHOT_SCHEDULER_INITIALISED, status="Success")
 
     ret = 0
     return ret
@@ -545,6 +585,8 @@ def perform_operation(args):
         ret = initialise_scheduler()
         if ret != 0:
             output("Failed to initialise snapshot scheduling")
+            gf_event (eventtypes.SNAPSHOT_SCHEDULER_INIT_FAILED,
+                      error=print_error(ret))
         return ret
 
     # Disable snapshot scheduler
@@ -552,6 +594,11 @@ def perform_operation(args):
         ret = disable_scheduler()
         if ret == 0:
             subprocess.Popen(["touch", "-h", GCRON_TASKS])
+            gf_event (eventtypes.SNAPSHOT_SCHEDULER_DISABLED,
+                      status="Successfuly Disabled")
+        else:
+            gf_event (eventtypes.SNAPSHOT_SCHEDULER_DISABLE_FAILED,
+                      error=print_error(ret))
         return ret
 
     # Check if the symlink to GCRON_TASKS is properly set in the shared storage
@@ -582,6 +629,11 @@ def perform_operation(args):
         ret = enable_scheduler()
         if ret == 0:
             subprocess.Popen(["touch", "-h", GCRON_TASKS])
+            gf_event (eventtypes.SNAPSHOT_SCHEDULER_ENABLED,
+                      status="Successfuly Enabled")
+        else:
+            gf_event (eventtypes.SNAPSHOT_SCHEDULER_ENABLE_FAILED,
+                      error=print_error(ret))
         return ret
 
     # Disable snapshot scheduler
@@ -589,6 +641,11 @@ def perform_operation(args):
         ret = disable_scheduler()
         if ret == 0:
             subprocess.Popen(["touch", "-h", GCRON_TASKS])
+            gf_event (eventtypes.SNAPSHOT_SCHEDULER_DISABLED,
+                      status="Successfuly Disabled")
+        else:
+            gf_event (eventtypes.SNAPSHOT_SCHEDULER_DISABLE_FAILED,
+                      error=print_error(ret))
         return ret
 
     # List snapshot schedules
@@ -604,6 +661,12 @@ def perform_operation(args):
         ret = add_schedules(args.jobname, args.schedule, args.volname)
         if ret == 0:
             subprocess.Popen(["touch", "-h", GCRON_TASKS])
+            gf_event (eventtypes.SNAPSHOT_SCHEDULER_SCHEDULE_ADDED,
+                      status="Successfuly added job "+args.jobname)
+        else:
+            gf_event (eventtypes.SNAPSHOT_SCHEDULER_SCHEDULE_ADD_FAILED,
+                      status="Failed to add job "+args.jobname,
+                      error=print_error(ret))
         return ret
 
     # Delete snapshot schedules
@@ -614,6 +677,12 @@ def perform_operation(args):
         ret = delete_schedules(args.jobname)
         if ret == 0:
             subprocess.Popen(["touch", "-h", GCRON_TASKS])
+            gf_event (eventtypes.SNAPSHOT_SCHEDULER_SCHEDULE_DELETED,
+                      status="Successfuly deleted job "+args.jobname)
+        else:
+            gf_event (eventtypes.SNAPSHOT_SCHEDULER_SCHEDULE_DELETE_FAILED,
+                      status="Failed to delete job "+args.jobname,
+                      error=print_error(ret))
         return ret
 
     # Edit snapshot schedules
@@ -624,6 +693,12 @@ def perform_operation(args):
         ret = edit_schedules(args.jobname, args.schedule, args.volname)
         if ret == 0:
             subprocess.Popen(["touch", "-h", GCRON_TASKS])
+            gf_event (eventtypes.SNAPSHOT_SCHEDULER_SCHEDULE_EDITED,
+                      status="Successfuly edited job "+args.jobname)
+        else:
+            gf_event (eventtypes.SNAPSHOT_SCHEDULER_SCHEDULE_EDIT_FAILED,
+                      status="Failed to edit job "+args.jobname,
+                      error=print_error(ret))
         return ret
 
     ret = INVALID_ARG