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From "Roeland Kuipers (JIRA)" <j...@apache.org>
Subject [jira] [Created] (CLOUDSTACK-4605) VPC router loses config after reboot
Date Wed, 04 Sep 2013 17:45:35 GMT
Roeland Kuipers created CLOUDSTACK-4605:
-------------------------------------------

             Summary: VPC router loses config after reboot
                 Key: CLOUDSTACK-4605
                 URL: https://issues.apache.org/jira/browse/CLOUDSTACK-4605
             Project: CloudStack
          Issue Type: Bug
      Security Level: Public (Anyone can view this level - this is the default.)
          Components: Virtual Router
    Affects Versions: 4.1.1
            Reporter: Roeland Kuipers


When rebooting a VPC router outside of cloudstack it will come up without proper configuration.

All interfaces are unconfigured except for eth0.

All other systemvm's are completely configured by kernel parameters and these parameters are
also cached in /var/cache/cloud/cmdline. So configurations are persistent across reboots.

VPC routers are configured only when rebooting them by cloudstack.

We like to see the same method as for normal routers for the following reason:

We have experienced a serious outage on redundant routing vm pair due to the OOM killer. Somehow
the master node ran OoM and the OOM killer decided to kill random processes causing HAproxy
to go down. But since keepalived was still running and functioning, a failover never happened.

In our experience we rather panic on OOM instead of praying that the OOM-killer will do the
right thing while it in 99% percent of the cases it just renders a machine useless.
If this RvR would have panicked and rebooted we would have had a nice keepalived failure/failover
without much impact on our customer.

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