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Configuration Guide
Appendix A. General configuration options

Appendix A. General configuration options

These are the general configuration options for Ceph.

Note

Typically, these will be set automatically by deployment tools, such as Ansible.

fsid

Description: The file system ID. One per cluster.
Type: UUID
Required: No.
Default: N/A. Usually generated by deployment tools.

admin_socket

Description: The socket for executing administrative commands on a daemon, irrespective of whether Ceph monitors have established a quorum.
Type: String
Required: No
Default: /var/run/ceph/$cluster-$name.asok

pid_file

Description: The file in which the monitor or OSD will write its PID. For instance, /var/run/$cluster/$type.$id.pid will create /var/run/ceph/mon.a.pid for the mon with id a running in the ceph cluster. The pid file is removed when the daemon stops gracefully. If the process is not daemonized (meaning it runs with the -f or -d option), the pid file is not created.
Type: String
Required: No
Default: No

chdir

Description: The directory Ceph daemons change to once they are up and running. Default / directory recommended.
Type: String
Required: No
Default: /

max_open_files

Description: If set, when the Red Hat Ceph Storage cluster starts, Ceph sets the max_open_fds at the OS level (that is, the max # of file descriptors). It helps prevents Ceph OSDs from running out of file descriptors.
Type: 64-bit Integer
Required: No
Default: 0

fatal_signal_handlers

Description: If set, we will install signal handlers for SEGV, ABRT, BUS, ILL, FPE, XCPU, XFSZ, SYS signals to generate a useful log message.
Type: Boolean
Default: true

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