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Do not attempt serf query when not initialized

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Sometimes, the vxlan kernel code may generate miss
notifications for vxlan bound packets when serf is
not initliazed. In such cases we should not try
doing a query as it will create a panic. We should
error out which will generate a log message.

Signed-off-by: Jana Radhakrishnan <mrjana@docker.com>
This commit is contained in:
Jana Radhakrishnan 2015-12-03 10:21:43 -08:00
parent 15a70d92dc
commit eef129c103
1 changed files with 4 additions and 0 deletions
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4
libnetwork/drivers/overlay/ov_serf.go
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@ -151,6 +151,10 @@ func (d *driver) processQuery(q *serf.Query) {
}
func (d *driver) resolvePeer(nid string, peerIP net.IP) (net.HardwareAddr, net.IPMask, net.IP, error) {
if d.serfInstance == nil {
return nil, nil, nil, fmt.Errorf("could not resolve peer: serf instance not initialized")
}
qPayload := fmt.Sprintf("%s %s", string(nid), peerIP.String())
resp, err := d.serfInstance.Query("peerlookup", []byte(qPayload), nil)
if err != nil {