LXD credential doesn't support public TLS certs

[Ian Booth]

stgraber@castiana:~$ juju clouds
Only clouds with registered credentials are shown.
There are more clouds, use --all to see them.
You can bootstrap a new controller using one of these clouds...

Clouds available on the client:
Cloud Regions Default Type Credentials Source Description
cluster 1 default lxd 0 built-in LXD Cluster
cluster-admin 1 default lxd 0 built-in LXD Cluster
juju-cluster 1 default lxd 0 built-in LXD Cluster
localhost 1 default lxd 0 built-in LXD Cluster
n-contest 1 default lxd 0 built-in LXD Cluster
n-ctf 1 default lxd 0 built-in LXD Cluster
n-infra 1 default lxd 0 built-in LXD Cluster
n-team000 1 default lxd 0 built-in LXD Cluster
s-athos 1 default lxd 0 built-in LXD Cluster
s-c2400 1 default lxd 0 built-in LXD Cluster
s-delmak 1 default lxd 0 built-in LXD Cluster
s-rpi 1 default lxd 0 built-in LXD Cluster
s-sateda 1 default lxd 0 built-in LXD Cluster
s-vagonbrei 1 default lxd 0 built-in LXD Cluster
s-vorash 1 default lxd 0 built-in LXD Cluster

stgraber@castiana:~$ juju bootstrap juju-cluster test
ERROR unable to read certificate from /home/stgraber/.config/lxc/servercerts/cluster.crt with error open /home/stgraber/.config/lxc/servercerts/cluster.crt: no such file or directory
ERROR unable to read certificate from /home/stgraber/.config/lxc/servercerts/cluster-admin.crt with error open /home/stgraber/.config/lxc/servercerts/cluster-admin.crt: no such file or directory
ERROR more than one credential detected
run juju autoload-credentials and specify a credential using the --credential argument

also it's incorrectly reporting ERROR for remotes that do not have a server certificate (because they use a valid public TLS cert)

[Ian Booth (wallyworld)]

Stefan submitted a fix here

https://github.com/juju/juju/pull/12330

Needs to be targetted to 2.8 and unit tests added.

[Ian Booth (wallyworld)]

https://github.com/juju/juju/pull/12335