r/useproxy: Configure system-wide proxy

The *useproxy* role configures the `http_proxy` et al. environmet
variables for systemd services and interactive shells.  Additionally, it
configures Yum repositories to use a single mirror via the `baseurl`
setting, rather than a list of mirrors via `metalink`, since the proxy
a) the proxy only allows access to _dl.fedoraproject.org_ and b) the
proxy caches RPM files, but this is only effective if all clients use
the same mirror all the time.

The `useproxy.yml` playbook applies this role to servers in the
*needproxy* group.
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2024-08-12 17:44:10 -05:00
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http_proxy: http://proxy.pyrocufflink.blue:3128
https_proxy: '{{ http_proxy }}'
all_proxy: '{{ http_proxy }}'
no_proxy: localhost,pyrocufflink.blue,*.pyrocufflink.blue,127.0.0.1,172.30.0.*,172.30.0.0/24