[jira] [Created] (MESOS-7074) port_mapping isolator: do not depend on /sys/class/net//speed

["Pierre Cheynier (JIRA)" <ji...@apache.org>]

Pierre Cheynier created MESOS-7074:
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             Summary: port_mapping isolator: do not depend on /sys/class/net/<ifname>/speed
                 Key: MESOS-7074
                 URL: https://issues.apache.org/jira/browse/MESOS-7074
             Project: Mesos
          Issue Type: Improvement
            Reporter: Pierre Cheynier
            Priority: Minor


I tried to use network/port_mapping isolator and faced this issue:  {{/sys/class/net/<ifname>/speed}} is unreadable because it is not set by the underlying network driver.

* on virtualized environment (KVM, virtualbox, AMIs, etc.)
* on CentOS 7 with teaming driver enabled, it doesn't report the speed.

{noformat}
# cat /sys/class/net/team0/speed 
cat: /sys/class/net/team0/speed: Invalid argument
{noformat}

Here is a pointer to the code blocks that perform those tests: https://git-wip-us.apache.org/repos/asf?p=mesos.git;a=blob;f=src/slave/containerizer/mesos/isolators/network/port_mapping.cpp;h=f6f2bfe1d5d3c113036ad44a480f97bbb462a269;hb=HEAD#l1588

In my opinion, to solve most of these use-cases, we could make those tests non-blocking, i.e. replace errors by log/warnings.

It could result in an inconsistency between the interface speed and the bw_limit set, but I guess there are more benefits in making it usable in more environments.



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