[jira] [Created] (CLOUDSTACK-9362) Migrating a VM using VXLANs and bridges fails

["Aaron Brady (JIRA)" <ji...@apache.org>]

Aaron Brady created CLOUDSTACK-9362:
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             Summary: Migrating a VM using VXLANs and bridges fails
                 Key: CLOUDSTACK-9362
                 URL: https://issues.apache.org/jira/browse/CLOUDSTACK-9362
             Project: CloudStack
          Issue Type: Bug
      Security Level: Public (Anyone can view this level - this is the default.)
          Components: KVM
    Affects Versions: 4.8.0, 4.7.1, 4.6.2
         Environment: Using KVM with VXLANs in Linux bridge devices (not OpenVSwitch)
            Reporter: Aaron Brady


https://github.com/apache/cloudstack/commit/bb8f7c652e42caacff5adce1ce60342603677605

The above commit introduces rewriting of bridge device names when migrating a virtual machine from one host to another. However, it also matches bridges called "brvx-1234" and rewrites them to (in my case) "brem1-1234" - this doesn't match the bridge name on the destination and causes the migration to fail with the error:

error : virNetDevGetMTU:397 : Cannot get interface MTU on 'brem1-1234': No such device

I have flagged this as major because it's not possible to migrate VMs using VXLANs for maintenance, which seems important (it's certainly important to me!).



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