Setting a specific configuration at runtime

To set a specific Ceph configuration at runtime, use the ceph config set command.

Prerequisites

A running IBM Storage Ceph cluster.
Root-level access to the Ceph Monitor or OSD nodes.

Procedure

Set the configuration on all Monitor or OSD daemons :

Syntax

ceph config set DAEMON CONFIG-OPTION VALUE

Example

[root@mon ~]# ceph config set osd debug_osd 10

Validate that the option and value are set:

Example

[root@mon ~]# ceph config dump
osd      advanced debug_osd  10/10

To remove the configuration option from all daemons:

Syntax

ceph config rm DAEMON CONFIG-OPTION VALUE

Example

[root@mon ~]# ceph config rm osd debug_osd

To set the configuration for a specific daemon:

Syntax

ceph config set DAEMON.DAEMON-NUMBER CONFIG-OPTION VALUE

Example

[root@mon ~]# ceph config set osd.0 debug_osd 10

To validate that the configuration is set for the specified daemon:

Example
```
[root@mon ~]# ceph config dump
osd.0      advanced debug_osd     10/10
```

To remove the configuration for a specific daemon:

Syntax

ceph config rm DAEMON.DAEMON-NUMBER CONFIG-OPTION

Example

[root@mon ~]# ceph config rm osd.0 debug_osd

Note: If you use a client that does not support reading options from the configuration database, or if you still need to use ceph.conf to change your cluster configuration for other reasons, run the following command:

ceph config set mgr mgr/cephadm/manage_etc_ceph_ceph_conf false

Be sure to maintain and distribute the ceph.conf file across the storage cluster.