hydra-notify: pre-declare metrics

Dependencies

• [2] 4H6FVIWG hydra-notify: make the prometheus endpoint configurable, default-off
• [*] IE2PRAQU hydra-queue-runner: Send build notifications

Change contents

• edit in src/script/hydra-notify at line 24
  [2.1357]

  [2.1357]
  + # Note: It is very important to pre-declare any metrics before using them.

  + # Add a new declaration for any new metrics you create. See:

  + # https://metacpan.org/pod/Prometheus::Tiny#declare

  + $prom->declare(

  + "notify_plugin_executions",

  + type => "counter",

  + help => "Number of times each plugin has been called by channel."

  + );

  + $prom->declare(

  + "notify_plugin_runtime",

  + type => "histogram",

  + help => "Number of seconds spent executing each plugin by channel."

  + );

  + $prom->declare(

  + "notify_plugin_success",

  + type => "counter",

  + help => "Number of successful executions of this plugin on this channel."

  + );

  + $prom->declare(

  + "notify_plugin_error",

  + type => "counter",

  + help => "Number of failed executions of this plugin on this channel."

  + );

  + $prom->declare(

  + "event_loop_iterations",

  + type => "counter",

  + help => "Number of iterations through the event loop. Incremented at the start of the event loop."

  + );

  + $prom->declare(

  + "event_received",

  + type => "counter",

  + help => "Timestamp of the last time a new event was received."

  + );

  + $prom->declare(

  + "notify_event",

  + type => "counter",

  + help => "Number of events received on the given channel."

  + );

  + $prom->declare(

  + "notify_event_error",

  + type => "counter",

  + help => "Number of events received that were unprocessable by channel."

  + );