From 7cded689fdf5983278e762d3e4691900eaa296bf Mon Sep 17 00:00:00 2001
From: rread <rread>
Date: Fri, 11 Apr 2003 19:27:59 +0000
Subject: [PATCH] b=1084 * add a --group=tag option to mds and ost devices, so
 related devices   can be failed over together. * rewrite lactve to failover a
 specific device group, instead of all   devices on a node.

---
 lustre/utils/Lustre/cmdline.py  |  2 +-
 lustre/utils/Lustre/lustredb.py | 12 +++++++
 lustre/utils/lactive            | 69 +++++++++++++++++++++++------------------
 3 files changed, 51 insertions(+), 32 deletions(-)

diff --git a/lustre/utils/Lustre/cmdline.py b/lustre/utils/Lustre/cmdline.py
index d87da80..9205c0a 100644
--- a/lustre/utils/Lustre/cmdline.py
+++ b/lustre/utils/Lustre/cmdline.py
@@ -125,7 +125,7 @@ class Options:
                 sys.exit(0)
             return self.option_wrapper(values), args
         except getopt.error, e:
-            raise error.OptionError(e)
+            raise error.OptionError(str(e))
 
     def usage(self):
         ret = 'usage: %s [options] %s\n' % (self.cmd, self.remain_help)
diff --git a/lustre/utils/Lustre/lustredb.py b/lustre/utils/Lustre/lustredb.py
index 14be906..c591f72 100644
--- a/lustre/utils/Lustre/lustredb.py
+++ b/lustre/utils/Lustre/lustredb.py
@@ -102,6 +102,18 @@ class LustreDB:
                         return ref_uuid
         return None
 
+    def get_group(self, group):
+        ret = []
+        devs = self.lookup_class('mds')
+        for tgt in devs:
+            if tgt.get_val('group', "") == group:
+                ret.append(tgt.getUUID())
+        devs = self.lookup_class('ost')
+        for tgt in devs:
+            if tgt.get_val('group', "") == group:
+                ret.append(tgt.getUUID())
+        return ret
+
     # Change the current active device for a target
     def update_active(self, tgtuuid, new_uuid):
         self._update_active(tgtuuid, new_uuid)
diff --git a/lustre/utils/lactive b/lustre/utils/lactive
index 5a7ca7f..6d7771d5 100644
--- a/lustre/utils/lactive
+++ b/lustre/utils/lactive
@@ -18,7 +18,10 @@
 #   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 #
 
-# Make the new node the active node for all devices it shares with the
+# For all the OST/MDSs that are primary on the --primary node, set
+# them to be active on --active if that OST is available on --active.
+#
+# Make the active node the active node for all devices it shares with the
 # old. The bulk of this code is for figuring out which devices to
 # change, and what to change them to.
 
@@ -31,48 +34,52 @@ import ldap
 import Lustre
 
 lactive_options = [
-    ('ldapurl',"LDAP server URL, eg. ldap://localhost", Lustre.Options.PARAM),
+    ('ldapurl',"LDAP server URL", Lustre.Options.PARAM,
+     "ldap://localhost"),
     ('config', "Cluster config name used for LDAP query", Lustre.Options.PARAM),
-    ('old', "The old, failed node name", Lustre.Options.PARAM),
-    ('new', "The new node name", Lustre.Options.PARAM),
+    ('group', "The group of devices to update", Lustre.Options.PARAM),
+    ('active', "The active node name", Lustre.Options.PARAM),
     ]
 
+def fatal(*args):
+    msg = string.join(map(str,args))
+    print "! " + msg
+    sys.exit(1)
+
+
 cl = Lustre.Options("lactive","", lactive_options)
 config, args = cl.parse(sys.argv[1:])
 
+if not (config.group or config.active):
+    fatal("Must specify both  group and active node.")
+
+if not config.config:
+    fatal("Missing config")
+    
 base = "config=%s,fs=lustre" % (config.config,)
 db = Lustre.LustreDB_LDAP('', {}, base=base, url = config.ldapurl)
 
-old = db.lookup_name(config.old)
-new = db.lookup_name(config.new)
+active_node = db.lookup_name(config.active)
+if not active_node:
+    fatal(config.active, "node not found in database.")
 
-print "old:", old.getUUID()
-print "new:",  new.getUUID()
+devices =  db.get_group(config.group)
+if len(devices) < 0:
+    fatal("no devices found for group", config.group)
+
+# for all devices in group
+  # lookup device in active node
+  # update the active device 
+for tgtuuid in devices:
+    active_uuid = db.get_active_dev(tgtuuid)
+    new_active_uuid = active_node.get_tgt_dev(tgtuuid)
+    if active_uuid != new_active_uuid:
+        print ("%s: changing active %s to %s:%s"
+               % (tgtuuid, active_uuid,
+                  config.active, new_active_uuid))
+        db.update_active(tgtuuid, new_active_uuid)
 
-def fatal(*args):
-    msg = string.join(map(str,args))
-    print "! " + msg
-    sys.exit(1)
 
-# find all the targets on the failed node and, change the active
-# pointers to point to the devices on the new node.
-prof_list = old.get_refs('profile')
-for prof_uuid in prof_list:
-    prof_db = db.lookup(prof_uuid)
-    if not prof_db:
-        fatal("profile:", profile, "not found.")
-    for ref_class, ref_uuid in prof_db.get_all_refs(): 
-        if ref_class in ('osd', 'mdsdev'):
-            devdb = db.lookup(ref_uuid)
-            tgtuuid = devdb.get_first_ref('target')
-            active_uuid = old.get_active_dev(tgtuuid)
-            if ref_uuid != active_uuid:
-                continue
-            inactive_uuid = new.get_tgt_dev(tgtuuid)
-            print ("%s: changing active %s:%s to %s:%s"
-                   % (tgtuuid, config.old, active_uuid,
-                      config.new, inactive_uuid))
-            db.update_active(tgtuuid, inactive_uuid)
 
 
 
-- 
1.8.3.1