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All - <br>
<br>
Gluster has identified a serious issue that affects anyone hosting
VM images for the Enomaly Elastic Cloud Platform with Gluster. This
issue is limited to Gluster versions =<3.1.4. We strongly
encourage anyone using Enomaly and Gluster to upgrade to Gluster
version 3.1.5 or higher. <br>
<br>
What causes the failure - <br>
<br>
Use a distribute-replicate volume.<br>
Mount using either NFS or the GlusterFS.<br>
Fail one of replica nodes. <br>
** Production is unaffected at this point.<br>
Restart the failed node. <br>
** All the virtual machines fail. <br>
** The ecpagent service on each hypervisor will constantly
restart.<br>
<br>
Root cause - <br>
<br>
Enomaly uses a locking mechanism in addition to and above the
standard POSIX locking to make sure that a VM never starts on two
servers at the same time. When a Enomaly sever starts a VM it writes
a file (<randomstuff.tmp> to the directory. The combination of
self-heal and a race between the ecpagents on the hypervisors
results in the VMs failing to start. <span>No data is lost or
damaged.</span><br>
<br>
Again, this issue is specific to Enomaly. Enomaly users should
immediatly upgrade to a version of Gluster =>3.1.5.<br>
<br>
<a class="moz-txt-link-freetext" href="http://download.gluster.com/pub/gluster/glusterfs/">http://download.gluster.com/pub/gluster/glusterfs/</a><br>
<br>
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<span><span style="font-family: Arial;">Thanks,</span><br
style="font-family: Arial;">
<br style="font-family: Arial;">
<span style="font-family: Arial;">Craig Carl</span><br
style="font-family: Arial;">
<span style="font-family: Arial;">Senior Systems Engineer |
Gluster</span><br style="font-family: Arial;">
<span class="" id="OBJ_PREFIX_DWT11525" style="font-family:
Arial;"><a href="callto:+1408-829-9953">408-829-9953</a></span><span
style="font-family: Arial;"> | San Francisco, CA<br>
</span><a href="http://www.gluster.com/gluster-for-aws/"
style="font-family: Arial;">http://www.gluster.com/gluster-for-aws/</a>
<br>
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