From 3f71b464ad5cdd1f1b53f2a31a4eef4e2a5550cc Mon Sep 17 00:00:00 2001
From: Guido Trotter <ultrotter@google.com>
Date: Tue, 14 Jul 2009 12:35:04 +0200
Subject: [PATCH] ssconf.CheckMasterCandidate
This function checks that the current node is a master candidate, and
terminates otherwise. It will be used upon ganeti-confd startup.
Signed-off-by: Guido Trotter <ultrotter@google.com>
Reviewed-by: Iustin Pop <iustin@google.com>
---
lib/constants.py | 1 +
lib/ssconf.py | 26 ++++++++++++++++++++++++++
2 files changed, 27 insertions(+)
diff --git a/lib/constants.py b/lib/constants.py
index 38a329119..91ce86ba9 100644
--- a/lib/constants.py
+++ b/lib/constants.py
@@ -279,6 +279,7 @@ EXIT_NOTCLUSTER = 5
EXIT_NOTMASTER = 11
EXIT_NODESETUP_ERROR = 12
EXIT_CONFIRMATION = 13 # need user confirmation
+EXIT_NOTCANDIDATE = 14
# tags
TAG_CLUSTER = "cluster"
diff --git a/lib/ssconf.py b/lib/ssconf.py
index 874b208bf..8ee84c112 100644
--- a/lib/ssconf.py
+++ b/lib/ssconf.py
@@ -290,3 +290,29 @@ def CheckMaster(debug, ss=None):
if debug:
sys.stderr.write("Not master, exiting.\n")
sys.exit(constants.EXIT_NOTMASTER)
+
+
+def CheckMasterCandidate(debug, ss=None):
+ """Checks the node setup.
+
+ If this is a master candidate, the function will return. Otherwise it will
+ exit with an exit code based on the node status.
+
+ """
+ try:
+ if ss is None:
+ ss = SimpleStore()
+ myself = utils.HostInfo().name
+ candidates = ss.GetMasterCandidates()
+ except errors.ConfigurationError, err:
+ print "Cluster configuration incomplete: '%s'" % str(err)
+ sys.exit(constants.EXIT_NODESETUP_ERROR)
+ except errors.ResolverError, err:
+ sys.stderr.write("Cannot resolve my own name (%s)\n" % err.args[0])
+ sys.exit(constants.EXIT_NODESETUP_ERROR)
+
+ if myself not in candidates:
+ if debug:
+ sys.stderr.write("Not master candidate, exiting.\n")
+ sys.exit(constants.EXIT_NOTCANDIDATE)
+
--
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