Verified Commit 986fa9ee authored by Kevin Morris's avatar Kevin Morris
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feat(PHP): add aurweb Prometheus metrics



Along with this initial requests metric implementation,
we also now serve the `/metrics` route, which grabs request
metrics out of cache and renders them properly for Prometheus.

**NOTE** Metrics are only enabled when the aurweb system admin
has enabled caching by configuring `options.cache` correctly
in `$AUR_CONFIG`. Otherwise, an error is logged about no cache
being configured.

New dependencies have been added which require the use of
`composer`. See `INSTALL` for the dependency section in regards
to composer dependencies and how to install them properly for
aurweb.

Metrics are in the following forms:

    aurweb_http_requests_count(method="GET",route="/some_route")
    aurweb_api_requests_count(method="GET",route="/rpc",type="search")

This should allow us to search through the requests for specific routes
and queries.
Signed-off-by: Kevin Morris's avatarKevin Morris <kevr@0cost.org>
parent 4e5b67f0
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