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Werk #20205: Rename the OMD service metric-backend to data-backend

Component Site management
Title Rename the OMD service metric-backend to data-backend
Date Sep 7, 2026
Level Prominent Change
Class New Feature
Compatibility Incompatible - Manual interaction might be required
Checkmk versions & editions
3.0.0b1
Not yet released 		Checkmk Ultimate, Checkmk Cloud, Checkmk Ultimate MT

The ClickHouse based storage introduced as the "metric backend" is now called the data backend. The site-level names follow suit.

What changed

  • The OMD service metric-backend is now data-backend, so omd start|stop|status data-backend and its etc/init.d and etc/rc.d entries use the new name.
  • The site binaries cmk-metric-backend-schema-manager and cmk-monitor-metric-backend become cmk-data-backend-schema-manager and cmk-monitor-data-backend.
  • The OMD update and restore hooks that upgrade or recover the database schema are renamed accordingly.

What you need to do

If your own scripts call omd ... metric-backend or cmk-metric-backend-schema-manager, switch to the new names. cmk-metric-backend-schema-manager stays for one release as a deprecated wrapper around cmk-data-backend-schema-manager; the OMD service name has no such wrapper.

omd update replaces the init script and rc link, so an enabled data backend comes up under the new name on its own. A locally modified etc/init.d/metric-backend is offered for merge as usual.

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