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vxlan: arp does not work between hosts as multicast group is communicated over physical nic instead of linux bridge (#5078) 

* vxlan: arp does not work between hosts as multicast group is communicated over physical nic instead of linux bridge

when linux bridge is setup (refer to http://docs.cloudstack.apache.org/projects/archived-cloudstack-getting-started/en/latest/networking/vxlan.html#configure-product-to-use-vxlan-plugin) and used as the kvm traffic label of physical networks, the vms on different hosts cannot reach each other.

(1) does not work:
```
/usr/share/cloudstack-common/scripts/vm/network/vnet/modifyvxlan.sh -v 1001 -p eth1 -b brvx-1001 -o add
```
"bridge fdb" shows
```
00:00:00:00:00:00 dev vxlan1001 dst 239.0.3.233 via eth1 self permanent
```

(2) this works:
```
/usr/share/cloudstack-common/scripts/vm/network/vnet/modifyvxlan.sh -v 1001 -p cloudbr1 -b brvx-1001 -o add
```
"bridge fdb" shows
```
00:00:00:00:00:00 dev vxlan1001 dst 239.0.3.233 via cloudbr1 self permanent
```

* vxlan: fix issue if kvm network label is not set
This commit is contained in:
Wei Zhou 2021-06-16 05:22:31 +02:00 committed by GitHub
parent 006d0fe4c4
commit 67182dc49b
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GPG Key ID: 4AEE18F83AFDEB23
2 changed files with 3 additions and 3 deletions
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4
plugins/hypervisors/kvm/src/main/java/com/cloud/hypervisor/kvm/resource/BridgeVifDriver.java
View File

@ -224,7 +224,7 @@ public class BridgeVifDriver extends VifDriverBase {
String brName = createVnetBr(vNetId, trafficLabel, protocol);
intf.defBridgeNet(brName, null, nic.getMac(), getGuestNicModel(guestOsType, nicAdapter), networkRateKBps);
} else {
String brName = createVnetBr(vNetId, "private", protocol);
String brName = createVnetBr(vNetId, _bridges.get("private"), protocol);
intf.defBridgeNet(brName, null, nic.getMac(), getGuestNicModel(guestOsType, nicAdapter), networkRateKBps);
}
} else {
@ -291,7 +291,7 @@ public class BridgeVifDriver extends VifDriverBase {
private String createVnetBr(String vNetId, String pifKey, String protocol) throws InternalErrorException {
String nic = _pifs.get(pifKey);
if (nic == null) {
if (nic == null || protocol.equals(Networks.BroadcastDomainType.Vxlan.scheme())) {
// if not found in bridge map, maybe traffic label refers to pif already?
File pif = new File("/sys/class/net/" + pifKey);
if (pif.isDirectory()) {

2
plugins/hypervisors/kvm/src/main/java/com/cloud/hypervisor/kvm/resource/IvsVifDriver.java
View File

@ -161,7 +161,7 @@ public class IvsVifDriver extends VifDriverBase {
private String createVnetBr(String vNetId, String pifKey, String protocol) throws InternalErrorException {
String nic = _pifs.get(pifKey);
if (nic == null) {
if (nic == null || protocol.equals(Networks.BroadcastDomainType.Vxlan.scheme())) {
// if not found in bridge map, maybe traffic label refers to pif already?
File pif = new File("/sys/class/net/" + pifKey);
if (pif.isDirectory()) {