[jira] [Created] (MESOS-4420) Support read host physical link speed from virtio driver

["Jiang Jun (JIRA)" <ji...@apache.org>]

Jiang Jun created MESOS-4420:
--------------------------------

             Summary: Support read host physical link speed from virtio driver
                 Key: MESOS-4420
                 URL: https://issues.apache.org/jira/browse/MESOS-4420
             Project: Mesos
          Issue Type: Bug
          Components: isolation, slave
    Affects Versions: 0.26.0
         Environment: In a VM using 'virtio' as its network driver
{quote}
00:03.0 Ethernet controller: Red Hat, Inc Virtio network device
{quote}
            Reporter: Jiang Jun


I followed the docs to build and run Mesos Slave with network-isolator.
When I run it inside of a VM, the error message comes:
{quote}
Failed to read /sys/class/net/eth0/speed: Invalid argument
{quote}

It seems that {{/sys/class/net/eth0/speed}} is not available in a VM using virtio.
The reason: http://serverfault.com/questions/738840/get-link-speed-of-an-virtio-net-network-adapter

I prefer to warn the user or use some other methods to get physical link speed, rather than quit the program. Nor, the Mesos Slave with {{--isolation="network/port_mapping"}} will not be able to run in a VM. In some production cases, people really need to install Mesos Slave in VMs.



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