Botkube specific metrics missing

[bygui86]

Overview

Botkube doesn't expose any specific metrics related to itself, for example:

• number of configured communications
• number of configured sources
• number of configured executors
• total events evaluated by botkube
• total events evaluated by each single source
• total commands executed by botkube
• total commands executed by each single executor

Acceptance Criteria

• Botkube exposes custom, specific metrics related to itself
• metrics must have botkube_ as prefix
• metrics to be exposed:
  • botkube_configured_communications as gauge with labels like "id=communication-id"
  • botkube_configured_sources as gauge with labels like "id=source-id"
  • botkube_configured_executors as gauge with labels like "id=executor-id"
  • botkube_total_evaluated_events_count as counter
  • botkube_source_evaluated_events_count as counter with labels like "source=source-id"
  • botkube_total_executed_commands_count as counter
  • botkube_executor_executed_commands_count as counter with labels like "executor=executor-id"

Most probably the list of possible metrics is not complete, so I invite maintainers and users to extend this list :)

Reason

A big piece of Botkube observability is missing, together with the possibility to define alarms based on specific aspects of Botkube.
Examples of alarm:

• I define a source that is too permissive and risk to overwhelmed the Slack channel
• I define a source that is too restrictive, not delivering any notifications in last 1h

[swastik959]

@pkosiec hello I want to work on the issue can you please guide to the file where I have to perform the action