[SAC] [OSGeo] #2269: Switch OSGeo 7 to use snap package for lxd which is now at 3.11

[OSGeo]

#2269: Switch OSGeo 7 to use snap package for lxd which is now at 3.11
---------------------------+--------------------------------------
 Reporter:  robe           |      Owner:  sac@…
     Type:  task           |     Status:  new
 Priority:  normal         |  Milestone:  Sysadmin Contract 2019-I
Component:  Systems Admin  |   Keywords:
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 I installed OSGeo7 with the lxd that came with Ubuntu 18.04  so that means
 it's at LXD version 3.0.3, which at this point is "ancient".

 Ubuntu policy is to stick this (only security updates for the life of it)
 which means we'd be stuck at 3.0 for 5 years.

 That said, the suggested recommendation for many software including LXD is
 to use snap packages instead.  Snap packages come in


 {{{
 stable
 candidate
 beta
 edge
 }}}

 and they are generally set to upgrade automatically and allow downgrade to
 previous working should something go wrong.

 That said, I'd like to switch our LXD to the snap package version which is
 at 3.11.

 Aside from I think snap will give a better upgrade experience, I also want
 the new pressing feature of lxd

 LXD starting at 3.3 supports the proxy_protocol which both HAProxy and
 NGINX support.  This will allow our nginx proxy to properly pass along the
 real ip address of the user making the request.  This is important for
 some apps such as wordpress and nextcloud which use tha info for blocking
 access.

 So before I bring any more containers on board, I'd like get this out of
 the way.

 I did a trial run on my own 18.04 server running lxd 3.0.3 that has about
 10 containers one of whic is of comparable size to our nextcloud one (Our
 biggest), and the upgrade was pretty fast.  So I don't expect any issues.
 I'll backup the containers first just in case.

 For reference these are the steps I'll be taking to migrate

 Based on this blog - https://blog.simos.info/how-to-migrate-lxd-from-deb-
 ppa-package-to-snap-package/
 {{{
 apt install snapd
 snap install lxd
 lxd.migrate
 }}}

 The lxd.migrate process

 1) shuts down the containers and the old lxd service
 2) then moves them to the snapd version making any upgrade changes to the
 containers needed
 3) Then brings them back online


 I'm also going to experiment with the nginx proxy thing on my test server
 to confirm that all works as expected before I change the osgeo7 box.

 If anybody has issue with the above plan, let me know.

-- 
Ticket URL: <https://trac.osgeo.org/osgeo/ticket/2269>
OSGeo <https://osgeo.org/>
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