LXD does have a configuration you can set without having to get its environment variables modified.
lxc config set core.proxy_http= lxc config set core.proxy_https= lxc config set core.proxy_ignore_hosts=
It will use the 'http_proxy' environment variable if core.proxy_http is not set.
In the short term you can use the above commands to set the http proxy. Juju itself should be setting those.
LXD does have a configuration you can set without having to get its environment variables modified.
lxc config set core.proxy_http= ignore_ hosts=
lxc config set core.proxy_https=
lxc config set core.proxy_
It will use the 'http_proxy' environment variable if core.proxy_http is not set.
In the short term you can use the above commands to set the http proxy. Juju itself should be setting those.