Modules

A module is a check type (cpu, http, disk, …). A check is one configured instance of a module - a checks: entry with a module, a name, and module-specific conf: fields:

checks:
  - module: cpu
    name: cpu_local
    conf:
      threshold: 90

Every check also supports the fields listed in Configuration (enable, severity_max, alert_delay, frequency, reverse_severity, root_required, tags) regardless of module - not repeated on each page below. cmt listmodules lists every registered module; cmt doc <module> prints the same reference as its page here, straight from the running binary.