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, obviating 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.
- fence(8), fence_node(8), fence_xvm(8)