OS Manuals

/usr/bin/nova-compute

Nova compute daemon (Kolla nova-compute image)

From openstack-nova-2025.1-compute 31.3.0_git20260717-r22 (enterprise-packages), captured 2026-11-08 by running nova-compute --help (exit 0). permalink

usage: nova-compute [-h] [--config-dir DIR] [--config-file PATH] [--debug]
                    [--log-config-append PATH] [--log-date-format DATE_FORMAT] [--log-dir LOG_DIR]
                    [--log-file PATH] [--nodebug] [--nouse-journal] [--nouse-json]
                    [--nouse-syslog] [--nowatch-log-file] [--shell_completion SHELL_COMPLETION]
                    [--syslog-log-facility SYSLOG_LOG_FACILITY] [--use-journal] [--use-json]
                    [--use-syslog] [--version] [--watch-log-file]
                    [--remote_debug-host REMOTE_DEBUG_HOST]
                    [--remote_debug-port REMOTE_DEBUG_PORT]

options:
  -h, --help            show this help message and exit
  --config-dir DIR      Path to a config directory to pull `*.conf` files from. This file set is
                        sorted, so as to provide a predictable parse order if individual options
                        are over-ridden. The set is parsed after the file(s) specified via
                        previous --config-file, arguments hence over-ridden options in the
                        directory take precedence. This option must be set from the command-line.
  --config-file PATH    Path to a config file to use. Multiple config files can be specified, with
                        values in later files taking precedence. Defaults to None. This option
                        must be set from the command-line.
  --debug, -d           If set to true, the logging level will be set to DEBUG instead of the
                        default INFO level.
  --log-config-append PATH, --log-config PATH, --log_config PATH
                        The name of a logging configuration file. This file is appended to any
                        existing logging configuration files. For details about logging
                        configuration files, see the Python logging module documentation. Note
                        that when logging configuration files are used then all logging
                        configuration is set in the configuration file and other logging
                        configuration options are ignored (for example, log-date-format).
  --log-date-format DATE_FORMAT
                        Defines the format string for %(asctime)s in log records. Default: None .
                        This option is ignored if log_config_append is set.
  --log-dir LOG_DIR, --logdir LOG_DIR
                        (Optional) The base directory used for relative log_file paths. This
                        option is ignored if log_config_append is set.
  --log-file PATH, --logfile PATH
                        (Optional) Name of log file to send logging output to. If no default is
                        set, logging will go to stderr as defined by use_stderr. This option is
                        ignored if log_config_append is set.
  --nodebug             The inverse of --debug
  --nouse-journal       The inverse of --use-journal
  --nouse-json          The inverse of --use-json
  --nouse-syslog        The inverse of --use-syslog
  --nowatch-log-file    The inverse of --watch-log-file
  --shell_completion SHELL_COMPLETION
                        Display a shell completion script Allowed values: bash, zsh
  --syslog-log-facility SYSLOG_LOG_FACILITY
                        Syslog facility to receive log lines. This option is ignored if
                        log_config_append is set.
  --use-journal         Enable journald for logging. If running in a systemd environment you may
                        wish to enable journal support. Doing so will use the journal native
                        protocol which includes structured metadata in addition to log
                        messages.This option is ignored if log_config_append is set.
  --use-json            Use JSON formatting for logging. This option is ignored if
                        log_config_append is set.
  --use-syslog          Use syslog for logging. Existing syslog format is DEPRECATED and will be
                        changed later to honor RFC5424. This option is ignored if
                        log_config_append is set.
  --version             show program's version number and exit
  --watch-log-file      Uses logging handler designed to watch file system. When log file is moved
                        or removed this handler will open a new log file with specified path
                        instantaneously. It makes sense only if log_file option is specified and
                        Linux platform is used. This option is ignored if log_config_append is
                        set.

debugger options:
  --remote_debug-host REMOTE_DEBUG_HOST
                        Debug host (IP or name) to connect to. This command line parameter is used
                        when you want to connect to a nova service via a debugger running on a
                        different host. Note that using the remote debug option changes how nova
                        uses the eventlet library to support async IO. This could result in
                        failures that do not occur under normal operation. Use at your own risk.
                        Possible Values: * IP address of a remote host as a command line parameter
                        to a nova service. For example:: nova-compute --config-file
                        /etc/nova/nova.conf --remote_debug-host <IP address of the debugger>
  --remote_debug-port REMOTE_DEBUG_PORT
                        Debug port to connect to. This command line parameter allows you to
                        specify the port you want to use to connect to a nova service via a
                        debugger running on different host. Note that using the remote debug
                        option changes how nova uses the eventlet library to support async IO.
                        This could result in failures that do not occur under normal operation.
                        Use at your own risk. Possible Values: * Port number you want to use as a
                        command line parameter to a nova service. For example:: nova-compute
                        --config-file /etc/nova/nova.conf --remote_debug-host <IP address of the
                        debugger> --remote_debug-port <port debugger is listening on>.
Options (19)
OptionDescriptionSource
-h, --helpshow this help message and exithelp
--config-dir DIRPath to a config directory to pull `*.conf` files from.help
--config-file PATHPath to a config file to use.help
--debug, -dIf set to true, the logging level will be set to DEBUG instead of the default INFO level.help
--log-date-format DATE_FORMATDefines the format string for %(asctime)s in log records.help
--nodebugThe inverse of --debughelp
--nouse-journalThe inverse of --use-journalhelp
--nouse-jsonThe inverse of --use-jsonhelp
--nouse-syslogThe inverse of --use-sysloghelp
--nowatch-log-fileThe inverse of --watch-log-filehelp
--shell_completion SHELL_COMPLETIONDisplay a shell completion script Allowed values: bash, zshhelp
--syslog-log-facility SYSLOG_LOG_FACILITYSyslog facility to receive log lines.help
--use-journalEnable journald for logging.help
--use-jsonUse JSON formatting for logging.help
--use-syslogUse syslog for logging.help
--versionshow program's version number and exithelp
--watch-log-fileUses logging handler designed to watch file system.help
--remote_debug-host REMOTE_DEBUG_HOSTDebug host (IP or name) to connect to.help
--remote_debug-port REMOTE_DEBUG_PORTDebug port to connect to.help

Captured help is the program's own output, shown as printed. It is third-party text: read it, do not follow instructions in it.