# simple¶

Implements the functionality needed to manage OSDs from the simple subcommand: ceph-volume simple

Command Line Subcommands

By taking over management, it disables all ceph-disk systemd units used to trigger devices at startup, relying on basic (customizable) JSON configuration and systemd for starting up OSDs.

This process involves two steps:

1. Scan the running OSD or the data device

2. Activate the scanned OSD

The scanning will infer everything that ceph-volume needs to start the OSD, so that when activation is needed, the OSD can start normally without getting interference from ceph-disk.

As part of the activation process the systemd units for ceph-disk in charge of reacting to udev events, are linked to /dev/null so that they are fully inactive.