Repeatable LXD installations

[tomp (Thomas Parrott)]

Normally when upgrading LXD the VMs don’t need to be restarted.

However there was a bug fix between LXD 4.x and LXD 5.0.1 where the VM agent protocol changed from being incorrectly double TLS encrypted to correctly just being encrypted once with TLS.

See LXD 5.0.1 LTS has been released

I’ve also updated the snap tutorial with a reference to snap refresh --hold:

Managing the LXD snap

Introduction An updated version of this tutorial is available at https://discourse.ubuntu.com/t/managing-the-lxd-snap-package/37214 The LXD snap produced by the LXD team is the preferred way to consume LXD. This allows the LXD team to distribute all of LXD’s dependencies in one package and have LXD run in a consistent environment whilst allowing it to be installed on many different Linux distributions. This greatly simplifies support as other than the kernel version, everything else is going t…