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Fix supervisord collector (#978)

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* Replace supervisord xmlrpc library
* Use `github.com/mattn/go-xmlrpc` that doesn't leak goroutines.
* Fix uptime metric

* Use Prometheus best practices for uptime metric.
  * Use "start time" rather than "uptime".
  * Don't emit a start time if the process is down.
* Add changelog entry.
* Add example compatibility rules.

Signed-off-by: Ben Kochie <superq@gmail.com>
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Ben Kochie 2018-08-06 16:54:46 +02:00 • committed by GitHub
commit 5d23ad0ca7
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docs/example-17-compatibility-rules-new-to-old.yml Normal file
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groups:
- name: node_exporter-17-supervisord
rules:
- record: node_supervisord_start_time_seconds
expr: node_supervisord_uptime + time()