NAME

       keepalived - load-balancing and high-availability service

SYNOPSIS

       keepalived [-f|--use-file=FILE] [-P|--vrrp] [-C|--check] [-l|--log-console]
       [-D|--log-detail] [-S|--log-facility={0-7}] [-V|--dont-release-vrrp]
       [-I|--dont-release-ipvs] [-R|--dont-respawn] [-n|--dont-fork] [-d|--dump-conf]
       [-p|--pid=FILE] [-r|--vrrp_pid=FILE] [-c|--checkers_pid=FILE] [-x|--snmp] [-A|--snmp-
       agent-socket=FILE] [-m|--core-dump] [-M|--core-dump-format[=PATTERN]] [-v|--version]
       [-h|--help]

DESCRIPTION

       Keepalived provides simple and robust facilities for load-balancing and high-availability.
       The load-balancing framework relies on the well-known and widely used Linux Virtual Server
       (IPVS) kernel module providing Layer4 load-balancing. Keepalived implements a set of
       checkers to dynamically and adaptively maintain and manage a load-balanced server pool
       according to their health. Keepalived also implements the VRRPv2 and VRRPv3 protocols to
       achieve high-availability with director failover.

OPTIONS

        -f, --use-file=FILE
              Use the specified configuration file. The default configuration file is
              "/etc/keepalived/keepalived.conf".

        -P, --vrrp
              Only run the VRRP subsystem. This is useful for configurations that do not use the
              IPVS load balancer.

        -C, --check
              Only run the healthcheck subsystem. This is useful for configurations that use the
              IPVS load balancer with a single director with no failover.

        -l, --log-console
              Log messages to the local console. The default behavior is to log messages to
              syslog.

        -D, --log-detail
              Detailed log messages.

        -S, --log-facility=[0-7]
              Set syslog facility to LOG_LOCAL[0-7]. The default syslog facility is LOG_DAEMON.

        -X, --release-vips
              Drop VIP on transition from signal.

        -V, --dont-release-vrrp
              Don't remove VRRP VIPs and VROUTEs on daemon stop. The default behavior is to
              remove all VIPs and VROUTEs when keepalived exits.

        -I, --dont-release-ipvs
              Don't remove IPVS topology on daemon stop. The default behavior it to remove all
              entries from the IPVS virtual server table when keepalived exits.

        -R, --dont-respawn
              Don't respawn child processes. The default behavior is to restart the VRRP and
              checker processes if either process exits.

        -n, --dont-fork
              Don't fork the daemon process. This option will cause keepalived to run in the
              foreground.

        -d, --dump-conf
              Dump the configuration data.

        -p, --pid=FILE
              Use the specified pidfile for the parent keepalived process. The default pidfile
              for keepalived is "/var/run/keepalived.pid", unless a network namespace is being
              used. See NAMESPACES below for more details.

        -r, --vrrp_pid=FILE
              Use the specified pidfile for the VRRP child process. The default pidfile for the
              VRRP child process is "/var/run/keepalived_vrrp.pid", unless a network namespace is
              being used.

        -c, --checkers_pid=FILE
              Use the specified pidfile for checkers child process. The default pidfile for the
              checker child process is "/var/run/keepalived_checkers.pid" unless a network
              namespace is being used.

        -x, --snmp
              Enable the SNMP subsystem.

        -A, --snmp-agent-socket=FILE
              Use the specified socket for connection to SNMP master agent.

        -m, --core-dump
              Override the RLIMIT_CORE hard and soft limits to enable keepalived to produce a
              coredump in the event of a segfault or other failure.  This is most useful if
              keepalived has been built with 'make debug'.  Core dumps will be created in /,
              unless keepalived is run with the --dont-fork option, in which case they will be
              created in the directory from which keepalived was run, or they will be created in
              the directory of a configuraton file if the fault occurs while reading the file.

        -M, --core-dump-pattern[=PATTERN]
              Sets option --core-dump, and also updates /proc/sys/kernel/core_pattern to the
              pattern specified, or 'core' if none specified.  Provided the parent process
              doesn't terminate abnormally, it will restore /proc/sys/kernel/core_pattern to its
              original value on exit.

              Note: This will also affect any other process producing a core dump while
              keepalived is running.

        -v, --version
              Display the version and exit.

        -h, --help
              Display this help message and exit.

NAMESPACES

       keepalived can be run in a network namespace (see keepalived.conf(5) for configuration
       details). When run in a network namespace, a local mount namespace is also created, and
       /var/run/keepalived/keepalived_NamespaceName is mounted on /var/run/keepalived. By
       default, pid files with the usual default names are then created in /var/run/keepalived
       from the perspective of a process in the mount namespace, and they will be visible in
       /var/run/keepalived/keepalived_NamespaceName for a process running in the default mount
       namespace.

SIGNALS

       keepalived reacts to a set of signals.  You can send a signal to the parent keepalived
       process using the following:

              kill -SIGNAL $(cat /var/run/keepalived.pid)

       Note that -SIGNAL must be replaced with the actual signal you are trying to send, e.g.
       with HUP. So it then becomes:

              kill -HUP $(cat /var/run/keepalived.pid)

       HUP    This causes keepalived to close down all interfaces, reload its configuration, and
              start up with the new configuration.

       TERM, INT
              keepalived will shut down.

       USR1   Write configuration data to /tmp/keepalived.data

       USR2   Write statistics info to /tmp/keepalived.stats

SEE ALSO

       keepalived.conf(5), ipvsadm(8)

AUTHOR

       This man page was written by Ryan O'Hara <rohara@redhat.com>

                                            April 2016                              KEEPALIVED(8)