<div dir="ltr"><div class="gmail_default" style="font-family:monospace,monospace;font-size:small">btrfs and direct-lvm is recommended for prod env.</div><div class="gmail_default" style="font-family:monospace,monospace;font-size:small"><br></div><div class="gmail_default" style="font-family:monospace,monospace;font-size:small">overlay is bad.</div><div class="gmail_default" style="font-family:monospace,monospace;font-size:small"><br></div></div><div class="gmail_extra"><br><div class="gmail_quote">On Thu, May 18, 2017 at 8:38 AM, Fox, Kevin M <span dir="ltr"><<a href="mailto:Kevin.Fox@pnnl.gov" target="_blank">Kevin.Fox@pnnl.gov</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">I've only used btrfs and devicemapper on el7. btrfs has worked well. devicemapper ate may data on multiple occasions. Is redhat supporting overlay in the el7 kernels now?<br>
<br>
Thanks,<br>
Kevin<br>
______________________________<wbr>__________<br>
From: Dan Prince [<a href="mailto:dprince@redhat.com">dprince@redhat.com</a>]<br>
Sent: Wednesday, May 17, 2017 5:24 PM<br>
To: openstack-dev<br>
Subject: [openstack-dev] [TripleO][Kolla] default docker storage backend for    TripleO<br>
<div class="HOEnZb"><div class="h5"><br>
TripleO currently uses the default "loopback" docker storage device.<br>
This is not recommended for production (see 'docker info').<br>
<br>
We've been poking around with docker storage backends in TripleO for<br>
almost 2 months now here:<br>
<br>
 <a href="https://review.openstack.org/#/c/451916/" rel="noreferrer" target="_blank">https://review.openstack.org/#<wbr>/c/451916/</a><br>
<br>
For TripleO there are a couple of considerations:<br>
<br>
 - we intend to support in place upgrades from baremetal to containers<br>
<br>
 - when doing in place upgrades re-partitioning disks is hard, if not<br>
impossible. This makes using devicemapper hard.<br>
<br>
 - we'd like to to use a docker storage backend that is production<br>
ready.<br>
<br>
 - our target OS is latest Centos/RHEL 7<br>
<br>
As we approach pike 2 I'm keen to move towards a more production docker<br>
storage backend. Is there consensus that 'overlay2' is a reasonable<br>
approach to this? Or is it too early to use that with the combinations<br>
above?<br>
<br>
Looking around at what is recommended in other projects it seems to be<br>
a mix as well from devicemapper to btrfs.<br>
<br>
[1] <a href="https://docs.openshift.com/container-platform/3.3/install_config/in
stall/host_preparation.html#configuring-docker-storage" rel="noreferrer" target="_blank">https://docs.openshift.com/<wbr>container-platform/3.3/<wbr>install_config/in<br>
stall/host_preparation.html#<wbr>configuring-docker-storage</a><br>
[2] <a href="http://git.openstack.org/cgit/openstack/kolla/tree/tools/setup_RedH
at.sh#n30" rel="noreferrer" target="_blank">http://git.openstack.org/cgit/<wbr>openstack/kolla/tree/tools/<wbr>setup_RedH<br>
at.sh#n30</a><br>
<br>
<br>
Dan<br>
<br>
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</div></div></blockquote></div><br><br clear="all"><div><br></div>-- <br><div class="gmail_signature" data-smartmail="gmail_signature"><div dir="ltr"><div><div dir="ltr"><div><div dir="ltr"><div dir="ltr"><div dir="ltr"><div><span style="font-size:13px;border-collapse:collapse"><font face="monospace, monospace">Regards,</font></span></div><div><span style="font-size:13px;border-collapse:collapse"><font face="monospace, monospace">Jeffrey Zhang</font></span></div><div><span style="font-family:monospace,monospace;font-size:12.8px">Blog: </span><a href="http://xcodest.me/" style="font-family:monospace,monospace;font-size:12.8px" target="_blank">http://xcodest.me</a><font face="monospace, monospace"><br></font></div></div></div></div></div></div></div></div></div>
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