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Delete both tunnel interfaces

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We also clean things up a bit and check for error messages,
which now can cause exceptions which should invoke cleanup.
This commit is contained in:
Bob Lantz
2015-02-04 04:14:40 -08:00
parent d90a45514f
commit 7c0b56f9ba
1 changed files with 20 additions and 23 deletions
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examples/cluster.py
+20 -23
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@@ -182,7 +182,7 @@ class RemoteMixin( object ):
self.sshcmd += [ '-o', 'ControlPath=' + self.controlPath,
'-o', 'ControlMaster=auto',
'-o', 'ControlPersist=' + '1' ]
self.sshcmd = self.sshcmd + [ self.dest ]
self.sshcmd += [ self.dest ]
self.isRemote = True
else:
self.dest = None
@@ -361,9 +361,12 @@ class RemoteLink( Link ):
def stop( self ):
"Stop this link"
Link.stop( self )
if self.tunnel:
self.tunnel.terminate()
self.intf1.delete()
self.intf2.delete()
else:
Link.stop( self )
self.tunnel = None
def makeIntfPair( self, intfname1, intfname2, addr1=None, addr2=None,
@@ -417,12 +420,11 @@ class RemoteLink( Link ):
# 1. Create tap interfaces
for node in node1, node2:
# For now we are hard-wiring tap9, which we will rename
node.rcmd( 'ip link delete tap9', stderr=PIPE )
cmd = 'ip tuntap add dev tap9 mode tap user ' + node.user
node.rcmd( cmd )
links = node.rcmd( 'ip link show' )
# print 'after add, links =', links
assert 'tap9' in links
result = node.rcmd( cmd )
if result:
raise Exception( 'error creating tap9 on %s: %s' %
( node, result ) )
# 2. Create ssh tunnel between tap interfaces
# -n: close stdin
dest = '%s@%s' % ( node2.user, node2.serverIP )
@@ -435,29 +437,24 @@ class RemoteLink( Link ):
debug( 'Waiting for tunnel to come up...\n' )
ch = tunnel.stdout.read( 1 )
if ch != '@':
error( 'makeTunnel:\n',
'Tunnel setup failed for',
'%s:%s' % ( node1, node1.dest ), 'to',
'%s:%s\n' % ( node2, node2.dest ),
'command was:', cmd, '\n' )
tunnel.terminate()
tunnel.wait()
error( ch + tunnel.stdout.read() )
error( tunnel.stderr.read() )
sys.exit( 1 )
raise Exception( 'makeTunnel:\n',
'Tunnel setup failed for',
'%s:%s' % ( node1, node1.dest ), 'to',
'%s:%s\n' % ( node2, node2.dest ),
'command was:', cmd, '\n' )
# 3. Move interfaces if necessary
for node in node1, node2:
if node.inNamespace:
retry( 3, .01, RemoteLink.moveIntf, 'tap9', node )
if not self.moveIntf( 'tap9', node ):
raise Exception( 'interface move failed on node %s' % node )
# 4. Rename tap interfaces to desired names
for node, intf, addr in ( ( node1, intfname1, addr1 ),
( node2, intfname2, addr2 ) ):
if not addr:
node.cmd( 'ip link set tap9 name', intf )
result = node.cmd( 'ip link set tap9 name', intf )
else:
node.cmd( 'ip link set tap9 name', intf, 'address', addr )
for node, intf in ( ( node1, intfname1 ), ( node2, intfname2 ) ):
assert intf in node.cmd( 'ip link show' )
result = node.cmd( 'ip link set tap9 name', intf, 'address', addr )
if result:
raise Exception( 'error renaming %s: %s' % ( intf, result ) )
return tunnel
def status( self ):