Appendix D. Overriding Ceph Default Settings

Unless otherwise specified in the Ansible configuration files, Ceph uses its default settings.

Because Ansible manages the Ceph configuration file, edit the /usr/share/ceph-ansible/group_vars/all.yml file to change the Ceph configuration. Use the ceph_conf_overrides setting to override the default Ceph configuration.

Ansible supports the same sections as the Ceph configuration file; [global], [mon], [osd], [mds], [rgw], and so on. You can also override particular instances, such as a particular Ceph Object Gateway instance. For example:

###################
# CONFIG OVERRIDE #
###################

ceph_conf_overrides:
   client.rgw.server601.rgw1:
      rgw_enable_ops_log: true
      log_file: /var/log/ceph/ceph-rgw-rgw1.log
Note

Do not use a variable as a key in the ceph_conf_overrides setting. You must pass the absolute label for the host for the section(s) for which you want to override particular configuration value.

Note

Ansible does not include braces when referring to a particular section of the Ceph configuration file. Sections and settings names are terminated with a colon.

Important

Do not set the cluster network with the cluster_network parameter in the CONFIG OVERRIDE section because this can cause two conflicting cluster networks being set in the Ceph configuration file.

To set the cluster network, use the cluster_network parameter in the CEPH CONFIGURATION section. For details, see Installing a Red Hat Ceph Storage cluster in the Red Hat Ceph Storage Installation Guide.