juju introspection proxy ^#2

Supports: xenial bionic

Allows prometheus to scrape Juju internal metrics

This charm has been created to make internal Juju metrics available for collection by prometheus.

It is using the juju-introspection-proxy snap.

Metrics will be available at http://<unit_ip>:19090/metrics once exposed.

port: (int) Port to listen for connections on; 19090
snap_proxy: (string) HTTP/HTTPS web proxy for Snappy to use when accessing the snap store.
snap_proxy_url: (string) The address of a Snappy Enterprise Proxy to use for snaps e.g. http://snap-proxy.example.com
snapd_refresh: (string) How often snapd handles updates for installed snaps. The default (an empty string) is 4x per day. Set to "max" to check once per month based on the charm deployment date. You may also set a custom string as described in the 'refresh.timer' section here: https://forum.snapcraft.io/t/system-options/87