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gnt-debug(8) Ganeti | Version @GANETI_VERSION@

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Name

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gnt-debug - Debug commands

Synopsis

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**gnt-debug** {command} [arguments...]

DESCRIPTION

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The **gnt-debug** is used for debugging the Ganeti system.

COMMANDS

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ALLOCATOR

~~~~~~~~~

**allocator** [--debug] [--dir *DIRECTION*] {--algorithm

*ALLOCATOR* } [--mode *MODE*] [--mem *MEMORY*] [--disks *DISKS*]

[--disk-template *TEMPLATE*] [--nics *NICS*] [--os-type *OS*]

[--vcpus *VCPUS*] [--tags *TAGS*] {*instance*}

Executes a test run of the *iallocator* framework.

The command will build input for a given iallocator script (named

with the ``--algorithm`` option), and either show this input data

(if *DIRECTION* is ``in``) or run the iallocator script and show its

output (if *DIRECTION* is ``out``).

If the *MODE* is ``allocate``, then an instance definition is built

from the other arguments and sent to the script, otherwise (*MODE* is

``relocate``) an existing instance name must be passed as the first

argument.

This build of Ganeti will look for iallocator scripts in the following

directories: @CUSTOM_IALLOCATOR_SEARCH_PATH@; for more details about

this framework, see the HTML or PDF documentation.

DELAY

~~~~~

**delay** [--debug] [--no-master] [-n *NODE*...] {*duration*}

Run a test opcode (a sleep) on the master and on selected nodes

(via an RPC call). This serves no other purpose but to execute a

test operation.

The ``-n`` option can be given multiple times to select the nodes

for the RPC call. By default, the delay will also be executed on

the master, unless the ``--no-master`` option is passed.

The *delay* argument will be interpreted as a floating point

number.

SUBMIT-JOB

~~~~~~~~~~

**submit-job** [--verbose] [--timing-stats] [--job-repeat ``N``]

[--op-repeat ``N``] {opcodes_file...}

This command builds a list of opcodes from files in JSON format and

submits a job per file to the master daemon. It can be used to test

options that are not available via command line.

The ``verbose`` option will additionally display the corresponding

job IDs and the progress in waiting for the jobs; the

``timing-stats`` option will show some overall statistics inluding

the number of total opcodes, jobs submitted and time spent in each

stage (submit, exec, total).

The ``job-repeat`` and ``op-repeat`` options allow to submit

multiple copies of the passed arguments; job-repeat will cause N

copies of each job (input file) to be submitted (equivalent to

passing the arguments N times) while op-repeat will cause N copies

of each of the opcodes in the file to be executed (equivalent to

each file containing N copies of the opcodes).

TEST-JOBQUEUE

~~~~~~~~~~~~~

**test-jobqueue**

Executes a few tests on the job queue. This command might generate

failed jobs deliberately.

LOCKS

~~~~~

| **locks** [--no-headers] [--separator=*SEPARATOR*]

| [-o *[+]FIELD,...*] [--interval=*SECONDS*]

Shows a list of locks in the master daemon.

The ``--no-headers`` option will skip the initial header line. The

``--separator`` option takes an argument which denotes what will be

used between the output fields. Both these options are to help

scripting.

The ``-o`` option takes a comma-separated list of output fields.

The available fields and their meaning are:

name

    Lock name

mode

    Mode in which the lock is currently acquired (exclusive or shared)

owner

    Current lock owner(s)

pending

    Threads waiting for the lock

If the value of the option starts with the character ``+``, the new

fields will be added to the default list. This allows to quickly

see the default list plus a few other fields, instead of retyping

the entire list of fields.

Use ``--interval`` to repeat the listing. A delay specified by the

option value in seconds is inserted.