fence_xvmd(8) System Manager's Manual fence_xvmd(8)
NAME
fence_xvmd - Libvirt-based, general purpose fencing host for virtual machines.
SYNOPSIS
fence_xvmd [OPTION]...
DESCRIPTION
fence_xvmd is an I/O Fencing host which resides on bare metal machines and is used in conjunction with the fence_xvm fencing agent.
Together, these two programs can be used to fence can be used machines which are part of a cluster.
If the virtual machines are backed by clustered storage or the virtual machines may be migrated to other physical machines, all physical
machines in question must also be a part of their own CMAN/OpenAIS based cluster. Furthermore, the bare metal cluster is required to have
fencing configured if virtual machine recovery is expected to be automatic.
fence_xvmd accepts options on the command line and from cluster.conf
OPTIONS
-f Foreground mode (do not fork)
-d Enable debugging output. The more times you specify this parameter, the more debugging output you will receive.
-i family
IP family to use (auto, ipv4, or ipv6; default = auto)
-a address
Multicast address to listen on (default=225.0.0.12 for ipv4, ff02::3:1 for ipv6)
-p port
Port to use (default=1229)
-I interface
Network interface to listen on, e.g. eth0.
-C auth
Authentication type (none, sha1, sha256, sha512; default=sha256). This controls the authentication mechanism used to authenticate
clients. The three SHA hashes use a key which must be shared between both the virtual machines and the host machine or cluster.
The three SHA authentication mechanisms use a simple bidirectional challenge-response based on pseudo- random number generation and
a shared private key.
-c hash
Packet hash type (none, sha1, sha256, sha512; default=sha256). This controls the hashing mechanism used to authenticate fencing
requests. The three SHA hashes use a key which must be shared between both the virtual machines and the host machine or cluster.
-k key_file
Use the specified key file for packet hashing / SHA authentication. When both the hash type and the authentication type are set to
"none", this parameter is ignored.
-u Fence by UUID instead of virtual machine name.
-? Print out a help message describing available options, then exit.
-h Print out a help message describing available options, then exit.
-X Do not connect to CCS for configuration; only use command line parameters. CCS configuration parameters override command line
parameters (because they are cluster-wide), so if you need to override a configuration option contained in CCS, you must specify
this parameter.
-L Local-only / non-cluster mode. When used with -X, this this option prevents fence_xvmd from operating as a clustered service, obvi-
ating the need to configure/run CMAN on the host domain.
-U uri Force use of the specified URI for connecting to the hypervisor.
-V Print out a version message, then exit.
CCS PARAMETERS
CCS options are simply attributes of the <fence_xvmd> tag, a child of the <cluster> tag in /etc/cluster/cluster.conf.
debug="1"
Same as the -d option. Specify numbers >1 for more debugging information.
family="param"
Same as the -i option.
multicast_address="param"
Same as the -a option.
port="param"
Same as the -p option.
auth="param"
Same as the -C option.
hash="param"
Same as the -c option.
key_file="param"
Same as the -k option.
use_uuid="1"
Same as the -u option.
SEE ALSO
fence(8), fence_node(8), fence_xvm(8)
fence_xvmd(8)