Ubuntu Manpage: vz.conf - global OpenVZ configuration file

NAME

       vz.conf - global OpenVZ configuration file

SYNOPSIS

       /etc/vz/vz.conf

DESCRIPTION

This is the global configuration file for OpenVZ. It consists of lines in the form

PARAMETER="value"

All parameter names and values are case-sensitive. Quotes surrounding value are required if value
contains spaces, and are optional otherwise. Extra spaces are not allowed. All unrecognized lines will be
ignored.

Global parameters
VIRTUOZZO=yes|no
This parameter can be set to yes or no, and used by the vz init script. In case it is not set to
yes, nothing will be done to boot up OpenVZ on this node.

LOCKDIR=directory
Set the directory to put lock files to.

VE0CPUUNITS=number
Value of this parameter sets cpuunits for CT0 (host system).

LOGGING=yes|no
Enables or disables logging. This parameter can be set to yes or no, default is yes.

LOGFILE=file
Set location of log file.

LOG_LEVEL=number
Set the logging level for the log file (does not affect console output). The greater the number
is, the more information will be logged to the LOGFILE. Default is 0, which means to log normal
messages and errors. If set to -1, only errors will be logged.

VERBOSE=number
Set the logging level for console/terminal output (does not affect log file). Default is 0, which
means to log normal messages and errors. Increasing the number makes vzctl(8) more verbose.

MODULES_DISABLED=yes|no
If the value of this parameter is set to yes, no attempt to load kernel modules is made by the vz
initscript. This is helpful on systems which have OpenVZ-specific features compiled into the
kernel (i. e. not as modules).

IPTABLES_MODULES="module module ..."
List of iptables kernel modules to be loaded by vz initscript before loading OpenVZ modules (which
is required for iptables to work inside containers).

VZFASTBOOT=yes|no
If the value of this parameter is set to yes, vz initscript called with start argument will start
the containers with uncleanly shutdown quota state without performing quota reinitialization
(which is usually a time-consuming process). After all the containers are started, the initscript
when restarts those containers with unclean quota in a normal way (to recalculate/fix quotas).

VE_STOP_MODE=suspend|stop
If the value of this parameter is set to suspend or not set at all, vz initscript called with stop
argument will try to suspend the running containers, instead of stopping them. Suspended
containers when will be restored on vz start. This feature usually helps to decrease the reboot
time. If a container fails to suspend, it will be stopped anyway.

VE_PARALLEL=number
A number of containers to be started or stopped simultaneously on node startup or shutdown. If not
specified, the number is calculated based on amount of CPU cores. Used by the vz initscript.

TEMPLATE=directory
Value of this parameter is a directory in which all container template data are stored.

SKIP_SYSCTL_SETUP=yes
If this parameter is not present, init.d/vz start sets some sysctl.conf(5) parameters required or
recommended by OpenVZ (with the help of vz-postinstall sysctl script), and then adds this
parameter to vz.conf.

Network interface parameters
VE_ROUTE_SRC_DEV="device"
This parameter specifies the network device name which IP address will be used as the source IP.
This is helpful in case more than one network interface is configured on HN and there is a need to
specify the source IP address. Default is the first device in the network device list.

NEIGHBOUR_DEVS="all|detect|list:dev1 [dev2 ...]"
Controls on which interfaces to add/remove ARP records for a container IP, also which interfaces
to use to query/announce ARP.

If set to all, an empty string, or unset, all possible network interfaces (i.e. the ones that are
UP and doesn't have NOARP, SLAVE, or LOOPBACK flags) are used. This is the default mode.

If set to detect, the right network interface (i.e. the one which is in the same subnet as a
container IP) will be chosen automatically.

If the value starts with list: prefix, the space-separated list of interfaces following the prefix
is used.

ERROR_ON_ARPFAIL=yes|no
In case the value of this parameter is set to yes, vzctl will fail to start a container if there
is another host with the same IP present in the network. Any other value makes vzctl to only print
the warning (which is the default behavior).

SKIP_ARPDETECT=yes|no
In case the value of this parameter is set to yes, vzctl will not use ARP queries when starting a
container in order to detect if there is another host with the same IP present in the network.
Note that for each IP, vzctl sends ARP query and waits up to 1 second for response. Any other
value means to do ARP detection.

FORCE_ROUTE=yes|no
In case the value of this parameter is set to yes, vzctl will attempt to change an existing route
to point to a container when starting a container if new route setup fails. Any other value means
to only attempt to add new routes (default behavior).

Defaults for vzctl create
These parameters are defaults for vzctl create and can be overwritten by its appropriate command line
options.

DEF_OSTEMPLATE=name
Default OS template to create a container from. Corresponds to --ostemplate option of vzctl
create.

CONFIGFILE=name
Default configuration file (/etc/vz/conf/ve-name.conf-sample) used to create a new container.
Corresponds to --config option of vzctl create.

VE_LAYOUT=simfs|ploop[:{plain|expanded|raw}]
Default CT filesystem layout for a new container, can either be ploop or simfs. In case ploop is
used, one can additionally specify ploop disk image format after a colon. Possible ploop formats
are expanded, plain and raw. Default is expanded. Using raw is not recommended and is not
supported.

Corresponds to --layout option of vzctl create.

Defaults for containers
Below parameters are defaults for containers, and can be overwritten by parameters in ctid.conf(5) per-
container configuration file.

DISK_QUOTA=yes|no
In case the value of this parameter is set to no, all disk quota operations are disabled.

VE_ROOT=directory
Value of this parameter is the directory which serves as container root mount point. Value must
contain literal string $VEID, which will be substituted with the actual numeric CT ID.

VE_PRIVATE=directory
Value of this parameter is the directory in which all the files and directories specific to that
container are stored. Value must contain literal string $VEID, which will be substituted with the
actual numeric CT ID.

STOP_TIMEOUT="number"
Time to wait for a container to shut down on vzctl stop, before forcibly killing it, in seconds.
Hardcoded to 120 if not set.

NAMESERVER="ip [ip ...]"
Default value for containers nameserver(s). Several name server addresses are divided by spaces.
If set to inherit, values from host system's /etc/resolv.conf are used.

SEARCHDOMAIN="domain [domain ...]"
Default value for containers search domains. Several search domains are divided by spaces. If set
to inherit, values from host system's /etc/resolv.conf are used.

Most of the other parameters that appear in per-container configuration files ctid.conf(5) can be also
set here. Still, it is recommended to keep TEMPLATE, VE_PRIVATE and VE_ROOT in this configuration file,
and all the other container related parameters in per-container configuration files.

LICENSE

       Copyright (C) 2000-2011, Parallels, Inc. Licensed under GNU GPL.

OpenVZ                                             20 Apr 2015                                        vz.conf(5)

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DESCRIPTION

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