<html><head><meta http-equiv="content-type" content="text/html; charset=utf-8"></head><body dir="auto"><div>I would have to at very least chown the subdirectory to the same user the container is running on in order to have write access to it from with in the container, but that was my thought that the volume itself provides enough protection. My friend who is an experienced systems administrator seems to be very uncomfortable with the idea of bind mounting into the container, as he thinks it kind of breaks the isolation that the containers provide when adding write access to the mount, Thoughts?<br><br><br><div><div>Best Regards,</div><div><br></div><div>Zach Lanich</div><div>Owner/Lead Developer</div><div>weCreate LLC</div><div><a href="http://www.wecreate.com">www.WeCreate.com</a></div><div>814.580.6636</div></div></div><div><br>On Aug 14, 2016, at 2:21 AM, Marat Khalili <<a href="mailto:mkh@rqc.ru">mkh@rqc.ru</a>> wrote:<br><br></div><blockquote type="cite"><div><meta http-equiv="Content-Type" content="text/html charset=utf-8">Hello Zach,<br>
<br>
> Gluster Volume subdirectories Bind Mounted into their respective containers (i.e. /data/gluster/user1 -> container:/data/gluster)<br>
<br>
Considering this line, do you even depend on ACLs? I'd think bind mounts provide sufficient protection by itself, as long as server demons run outside containers.<br>
<br>
(I'm currently facing similar problem, but don't have first-hand experience solving it yet.)<br>
-- <br>
<br>
With Best Regards,<br>
Marat Khalili<br><br><div class="gmail_quote">On August 14, 2016 4:50:52 AM GMT+03:00, Zach Lanich <<a href="mailto:zach@zachlanich.com">zach@zachlanich.com</a>> wrote:<blockquote class="gmail_quote" style="margin: 0pt 0pt 0pt 0.8ex; border-left: 1px solid rgb(204, 204, 204); padding-left: 1ex;">
Hey guys, I have a crucial decision I have to make about a platform I’m building, and I really need your help to make this decision in regards to security. Here’s what I’m trying to accomplish:<div class=""><br class=""></div><div class="">Platform: Highly Available Wordpress hosting using Galera, GlusterFS & LXD (don’t worry about the SQL part)</div><div class="">- One container per customer on a VM (or ded server)</div><div class="">- (preferably) One 3 node GlusterFS Cluster for the Wordpress files of all customers’ containers</div><div class="">- GlusterFS volume divided into subdirectories (one per customer), with ACLs to control permissions (see *)</div><div class="">- Gluster Volume subdirectories Bind Mounted into their respective containers (i.e. /data/gluster/user1 -> container:/data/gluster)</div><div class="">- LXC User/Group mappings to make the ACLs work</div><div class=""><br class=""></div><div class="">My concerns:</div><div class="">- (*) Although the containers are isolated (all but the shared kernel), and that in itself is probably secure enough to feel ok about it, introducing a shared Gluster volume into the mix and depending on ACLs makes me a bit nervous. I’d like your opinions on what the norm is in the world (the PaaSs, etc) and if you guys think this is a terrible idea. If you think this is not a good way of handling my needs, PLEASE help me find a better solution.</div><div class=""><br class=""></div><div class="">My hangups:</div><div class="">- I know PaaSs have found incredibly efficient ways to provide containerized apps with high availability, and I tend to highly doubt they’re throwing up 3+ GlusterFS VMs for every single app they deploy. This to me seems like an impossibly cost-ineffective approach. Correct me if I’m wrong. That being said, I’m not 100% sure how they’re doing it.</div><div class=""><br class=""></div><div class="">Odd thoughts & alternative solutions that have crossed my mind:</div><div class="">- To avoid using a shared single Gluster Volume and ACLs altogether, while also avoiding too much infrastructure cost, I’ve thought of possible putting up a 3 VM Gluster cluster, each with matching LXD Containers on them with Gluster server daemons running in those containers. I could use those containers & networking to simulate having multiple 3 node Gluster Clusters, each being dedicated to a respective containerized app on the App Server. This to me seems like it would be an unnecessarily complex and annoying to maintain solution, so please help me here.</div><div class=""><br class=""></div><div class="">I hugely appreciate anyones help and this is a huge passion project of mine and I’ve dedicated an absurd number of hours reading to try and figure this out.<br class=""><div class="">
<div style="color: rgb(0, 0, 0); letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px; word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;" class=""><div style="color: rgb(0, 0, 0); letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px; word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;" class=""><div style="color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px;" class=""><br class="Apple-interchange-newline">Best Regards,</div><div style="color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px;" class=""><br class=""></div><div style="color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px;" class="">Zach Lanich</div><div style="color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px;" class=""><i class="">Business Owner, Entrepreneur, Creative</i></div><div style="color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px;" class=""><b class=""><i class="">Owner/CTO</i></b></div><div style="color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px;" class="">weCreate LLC</div><div style="color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px;" class=""><div class=""><i class=""><a href="http://www.wecreate.com" class="">www.WeCreate.com</a></i></div></div></div></div>
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<br class=""></div><p style="margin-top: 2.5em; margin-bottom: 1em; border-bottom: 1px solid #000"></p><pre class="k9mail"><hr><br>lxc-users mailing list<br><a href="mailto:lxc-users@lists.linuxcontainers.org">lxc-users@lists.linuxcontainers.org</a><br><a href="http://lists.linuxcontainers.org/listinfo/lxc-users">http://lists.linuxcontainers.org/listinfo/lxc-users</a></pre></blockquote></div></div></blockquote><blockquote type="cite"><div><span>_______________________________________________</span><br><span>lxc-users mailing list</span><br><span><a href="mailto:lxc-users@lists.linuxcontainers.org">lxc-users@lists.linuxcontainers.org</a></span><br><span><a href="http://lists.linuxcontainers.org/listinfo/lxc-users">http://lists.linuxcontainers.org/listinfo/lxc-users</a></span></div></blockquote></body></html>