Currently, chasquid gets version information from build-time flags that
have to be passed by the user.
This patch extends this logic so, if no flags are given, Go's build
information will be used to construct a synthetic version string.
This patch changes several internal packages to receive and pass tracing
annotations, making use of the new tracing library, so we can have
better debugging information.
Allows terminating chasquid via the network. Useful to trigger a restart
(if there is an init system to relaunch chasquid) and thus reload certificates.
Amended-by: Alberto Bertogli <albertito@blitiri.com.ar>
Added tests, and adjusted shutdown sequence.
This patch makes chasquid's monitoring server expose an OpenMetrics
metrics endpoint.
It adds a new package "expvarom" which implements an HTTP handler that
exports expvar variables in the OpenMetrics text format.
Then, the handler is registered by the monitoring server at /metrics
(where most things expect it to be).
The existing exported variables are also extended with descriptions,
which is optional, but improves the readability of the metrics.
This patch improves the organization of the monitoring index page:
- Include the hostname (both OS and configured) for convenience.
- Round the uptime presentation for readability.
- Add a tiny CSS for consistency with the traces.
- Re-arrange the list of links for readability.
