ceph-conf is a command-line utility that extracts and displays configuration settings from Ceph configuration files (typically /etc/ceph/ceph.conf). It is useful for troubleshooting, scripting, or verifying settings without manually parsing the file.

How to Use ceph-conf

1. Basic Usage

     ceph-conf

• Run ceph-conf to display the entire configuration file:
• Output will show all configuration sections (e.g., [mon], [osd], [client.admin]).

2. Query Specific Sections

     ceph-conf --section=mon

• Use --section to view a specific configuration section (e.g., [mon]):
• Replace mon with your desired section (e.g., osd, client.admin).

3. Query Specific Keys

     ceph-conf --section=mon --key=mon host

• Use --key to display a specific configuration key within a section:
• Example output: mon host = mon1.example.com:6789

4. List Available Sections and Keys

     ceph-conf --list-sections

     ceph-conf --section=mon --list-keys

• To see all available sections:
• To see all keys in a specific section:

5. Practical Examples

     ceph-conf --section=mon --key=mon host

     ceph-conf --section=osd --key=osd mount_options

     ceph-conf --section=client.admin --list-keys

• Check the monitor port:
• Verify OSD mount options:
• List all client configuration keys:

6. Troubleshooting Tips

     ceph-conf --config-file /path/to/ceph.conf

     ls /etc/ceph/ceph.conf

• Ensure the Ceph configuration file path is correct (default: /etc/ceph/ceph.conf). If not, specify the path explicitly:
• Verify the configuration file exists:

When to Use ceph-conf

• To quickly check configuration values during troubleshooting.
• To script configuration checks (e.g., validate mon host settings).
• To avoid manual editing of ceph.conf files.

Note: ceph-conf is part of the Ceph CLI tools. Ensure the ceph package is installed and the configuration file is valid. If issues persist, check the Ceph configuration file for syntax errors.