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Set up better monitoring / alerts for Parsoid varnishes
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Description

We should have alerts for issues like backend connection failures as graphed here:

https://ganglia.wikimedia.org/latest/graph_all_periods.php?c=Parsoid%20Varnish%20eqiad&h=cp1058.eqiad.wmnet&r=hour&z=default&jr=&js=&st=1384819991&v=85099&m=varnish.backend_fail&vl=N%2Fs&ti=Backend%20conn.%20failures&z=large

We should also have an alert / graphing for other failed requests.


Version: unspecified
Severity: normal

Details

Reference
bz57265