Random tools I've found interesting

Ryan Harper ryan.harper at canonical.com
Fri Mar 6 15:46:29 UTC 2020

On Thu, Mar 5, 2020 at 1:53 PM Bryce Harrington <
bryce.harrington at canonical.com> wrote:

> As followup to our retrospective, this past year I've found and played
> with several tools, that I thought might be worth show-and-telling
> about, and given our corona-sprint we're in will do so via email:
> == LXD Login ==
> I'm always looking for ways to improve my user experience with lxc
> containers.  Logging in has always felt a bit baroque, so I've been
> scouring for simpler solutions.  I found out that LXD supports
> 'aliases', and that you can construct a login alias, which works pretty
> good.
>   $ lxc alias add login 'exec @ARGS@ --mode interactive -- bash -xac
> $@bryce - exec /bin/login -p -f '

If you're using system containers with networking, I very much like this
ssh config:

# /home/rharper/.ssh/config.defaults
Host *.lxd
    User ubuntu
    IdentityFile /home/rharper/.ssh/id_rsa
    StrictHostKeyChecking no
    UserKnownHostsFile /dev/null
    ProxyCommand nc $(lxc list -c s4 $(basename %h .lxd) | awk '/RUNNING/
{print $4}') %p

With an update to the lxd default profile:

(neipa) ~ % cat user-data.txt
- ssh-rsa  <snip>
(neipa) ~ % lxc profile set default user.user-data - < user-data.txt
(neipa) ~ % lxc launch ubuntu-daily:focal f2
Creating f2
Starting f2
(neipa) ~ % ssh f2.lxd
Warning: Permanently added 'f2.lxd' (ECDSA) to the list of known hosts.
ubuntu at f2:~$
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