When running locally, does Juju use the host machine's APT cache?

Question

When juju fetches packages for a unit, does it make use of the host system's APT cache? I'm asking this because in my case, bandwidth is limited and I am doing some charm development.

It is not really an option to have Juju continuously fetching packages every time I want to test a charm. Is there some way of having Juju cache the packages it fetches so that it doesn't have to download them all each time?

Answer 1

If you're using juju locally then it automatically caches debs using squid-deb-proxy.

Juju has an option to allow you to use other apt proxies on your network, see:

• https://juju.ubuntu.com/docs/howto-proxies.html

You basically define it in your ~/.juju/environments.yaml for the specific environment, like so:

apt-http-proxy: http://10.0.3.1:8000