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From "Caleb Call (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (CLOUDSTACK-105) /tmp/stream-unix.####.###### stale sockets causing inodes to run out on Xenserver
Date Mon, 08 Oct 2012 16:12:02 GMT

    [ https://issues.apache.org/jira/browse/CLOUDSTACK-105?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13471641#comment-13471641
] 

Caleb Call commented on CLOUDSTACK-105:
---------------------------------------

Our servers are all in bridge mode (per the setup instructions in the Cloudstack setup guide).
 

[root@cloud-hv01 log]# cat /etc/xensource/network.conf 
bridge
[root@cloud-hv01 log]# 

I also noticed in /var/log/messages, the following are being logged over and over.  Looks
like this is something related to openvswitch.

Oct  8 10:06:54 cloud-hv01 syslogd 1.4.1: restart.
Oct  8 10:06:57 cloud-hv01 ovs-vsctl: 1568403|stream_unix|ERR|/tmp/stream-unix.9679.784180:
connection to /var/run/openvswitch/db.sock failed: No such file or directory
Oct  8 10:06:57 cloud-hv01 ovs-vsctl: 1568404|reconnect|WARN|unix:/var/run/openvswitch/db.sock:
connection attempt failed (No such file or directory)
Oct  8 10:07:05 cloud-hv01 ovs-vsctl: 1568405|stream_unix|ERR|/tmp/stream-unix.9679.784181:
connection to /var/run/openvswitch/db.sock failed: No such file or directory
Oct  8 10:07:05 cloud-hv01 ovs-vsctl: 1568406|reconnect|WARN|unix:/var/run/openvswitch/db.sock:
connection attempt failed (No such file or directory)
Oct  8 10:07:13 cloud-hv01 ovs-vsctl: 1568407|stream_unix|ERR|/tmp/stream-unix.9679.784182:
connection to /var/run/openvswitch/db.sock failed: No such file or directory
Oct  8 10:07:13 cloud-hv01 ovs-vsctl: 1568408|reconnect|WARN|unix:/var/run/openvswitch/db.sock:
connection attempt failed (No such file or directory)

I've also noticed this same behavior of leaving these stale socket files behind on a completely
different Cloudstack cluster using Xenserver in bridge mode.
                
> /tmp/stream-unix.####.###### stale sockets causing inodes to run out on Xenserver
> ---------------------------------------------------------------------------------
>
>                 Key: CLOUDSTACK-105
>                 URL: https://issues.apache.org/jira/browse/CLOUDSTACK-105
>             Project: CloudStack
>          Issue Type: Bug
>          Components: XenServer
>    Affects Versions: pre-4.0.0
>         Environment: Xenserver 6.0.2
> Cloudstack 3.0.2
>            Reporter: Caleb Call
>            Assignee: Devdeep Singh
>             Fix For: 4.1.0
>
>
> We came across an interesting issue in one of our clusters.  We ran out of inodes on
all of our cluster members (since when does this happen in 2012?).  When this happened, it
in turn made the / filesystem a read-only filesystem which in turn made all the hosts go in
to emergency maintenance mode and as a result get marked down by Cloudstack.  We found that
it was caused by hundreds of thousands of stale socket files in /tmp named "stream-unix.####.######".
 To resolve the issue, we had to delete those stale socket files (find /tmp -name "*stream*"
-mtime +7 -exec rm -v {} \;), then kill and restart xapi, then correct the emergency maintenance
mode.  These hosts had only been up for 45 days before this issue occurred.  
> In our scouring of the interwebs, the only other instance we've been able to find of
this (or similar) happening is in the same setup we are currently running. Xenserver 6.0.2
with CS 3.0.2.  Do these stream-unix sockets have anything to do with Cloudstack?  I would
think if this was a Xenserver issue (bug), there would be a lot more on the internet about
this happening.  For a temporary workaround, we've added a cronjob to cleanup these files
but we'd really like to address the actual issue that's causing these sockets to become stale
and not get cleaned-up.

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