From: Weston Andros Adamson <dros@xxxxxxxxxx>
if a loopback addresses is specified for a DS, use that address for MDS to DS
communication and remove it from the advertised addresses in getdeviceinfo
(it obviously would never work).
this is useful for testing network partitions - you can bring down / firewall
off an interface without breaking MDS<->DS communications.
an example dataservers.conf:
192.168.55.1:12345,127.0.0.1:12345/pynfs_mds
192.168.55.1:12346,127.0.0.1:12346/pynfs_mds
Signed-off-by: Weston Andros Adamson <dros@xxxxxxxxxx>
---
nfs4.1/dataserver.py | 28 ++++++++++++++++++++++------
1 files changed, 22 insertions(+), 6 deletions(-)
diff --git a/nfs4.1/dataserver.py b/nfs4.1/dataserver.py
index 65e4f55..dd2a535 100644
--- a/nfs4.1/dataserver.py
+++ b/nfs4.1/dataserver.py
@@ -187,9 +187,27 @@ class DSDevice(object):
log.critical("Could not parse line: %r" % line)
sys.exit(1)
- # for now, just use the last path for local connections
- server, port = server_list[-1]
- server_list = server_list[:-1]
+ # if there is a (IPv4) loopback address in the multipath list,
+ # use that as the connection to the DS, but dont advertise it
+ loopback_idx = -1
+ for i, serverport in enumerate(server_list):
+ if serverport[0] == '127.0.0.1':
+ loopback_idx = i
+ break
+
+ if loopback_idx >= 0:
+ print "Using loopback address for MDS->DS communication only"
+ server_list = list(server_list)
+ server, port = server_list.pop(loopback_idx)
+ else:
+ # just use the last path for local connections
+ server, port = server_list[-1]
+
+ if not server_list:
+ log.critical("At least one non-loopback address must " +
+ "be specified for each DS")
+ sys.exit(1)
+
print server, port, path
try:
log.info("Adding dataserver ip:%s port:%s path:%s" %
@@ -210,9 +228,7 @@ class DSDevice(object):
index = 0
for d in self.list:
if d.active:
- multipath = []
- multipath.extend(d.get_multipath_netaddr4s())
- multipath.append(d.get_netaddr4())
+ multipath = d.get_multipath_netaddr4s()
netaddrs.append(multipath)
stripe_indices.append(index)
index = index + 1
--
1.7.7.6
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