Contents
NAME
vzcptcheck − show/test CPT properties
SYNOPSIS
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vzcptcheck |
property [argument ...] |
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vzcptcheck |
help |
DESCRIPTION
This low-level utility is used by vzmigrate(8) to check if a container can be succesfully restored on a destination system before performing live migration. Currently, it is able to check CPT version and CPU flags compatibility.
There are two modes of operation: to show a property and to test a property. Showing mode is invoked if a property specified with no arguments; testing mode requires one or many arguments after a property name. Generally, one runs vzcptcheck on one node to get a property, and on the other node to check for the property.
Note that this utility does not guarantee that migration will succeed even if all tests are passed. It merely gives a way to prevent migration which will definitely fail.
OPTIONS
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vzcptcheck |
version |
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vzcptcheck |
version num |
To get CPT version number, run vzcptcheck version on the source node. Then, to check if this version number is supported, run vzcptcheck version num on the destination node.
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vzcptcheck |
caps |
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vzcptcheck |
caps ctid capnum |
To get CPU capabilities number, run vzcptcheck caps on the destination node. Then, to check if a CT can be migrated to node with such a CPU, run vzcptcheck caps ctid capnum on the source node.
EXIT STATUS
In showing mode, returns 0 upon success, or 1 in case of an error.
In testing mode, returns 0 if migration is possible (test passed), 1 in case of an error, or 2 if migration is not possible (test failed).
EXAMPLES
To check if a CT 123 can be migrated to $DEST, run the following commands on the source node. Note that error checking is omitted for brevity.
VEID=123 VERSION=$(vzcptcheck version) echo Got CPT version: $VERSION ssh root@$DEST vzcptcheck version $VERSION echo Version check result: $? CAPS=$(ssh root@$DEST vzcptcheck caps) echo Got caps: $CAPS vzcptcheck caps $VEID $CAPS echo Caps check result: $?
If both tests pass, you should get 0 as a result for both checks.
SEE ALSO
LICENSE
Copyright (C) 2013, Parallels, Inc. Licensed under GNU GPL v2.