gnt-debug¶
Name¶
gnt-debug - Debug commands
Synopsis¶
gnt-debug {command} [arguments…]
DESCRIPTION¶
The gnt-debug is used for debugging the Ganeti system.
COMMANDS¶
IALLOCATOR¶
iallocator [--debug] [--dir direction] {--algorithm allocator } [--mode mode] [--mem memory] [--disks diskS] [--disk-template template] [--nics nics] [--os-type OS] [--vcpus vcpus] [--tags tags] {instance-name}
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: /usr/local/lib/ganeti/iallocators; for more details about this framework, see the HTML or PDF documentation.
DELAY¶
delay [--debug] [--no-master] [--interruptible] [-n node-name…] {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 --interruptible option allows a running delay opcode to be
interrupted by communicating with a special domain socket. If any data
is sent to the socket, the delay opcode terminates. If this option is
used, no RPCs are performed, but locks are still acquired.
The delay argument will be interpreted as a floating point number.
SUBMIT-JOB¶
submit-job [--verbose] [--timing-stats] [--job-repeat n] [--op-repeat n] [--each] {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 including
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).
The each option allow to submit each job separately (using N
SubmitJob LUXI requests instead of one SubmitManyJobs request).
TEST-JOBQUEUE¶
test-jobqueue
Executes a few tests on the job queue. This command might generate failed jobs deliberately.
TEST_OSPARAMS¶
test-osparams {–os-parameters-secret param*=*value… }
Tests secret os parameter transmission.
LOCKS¶
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 -v option activates verbose mode, which changes the display of
special field states (see ganeti(7)).
The -o option takes a comma-separated list of output fields.
The available fields and their meaning are:
modeMode in which the lock is currently acquired (exclusive or shared)
nameLock name
ownerCurrent lock owner(s)
pendingThreads 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 one 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.
METAD¶
Tests the WConf daemon by invoking its echo function.
A given text is sent to Metad through RPC, echoed back by Metad and printed to the console.
WCONFD¶
Tests the WConf daemon by invoking its echo function.
A given text is sent to WConfd through RPC, echoed back by WConfd and printed to the console.
A request to clean up all stale locks is sent to WConfd.
A request to list the locks owned by the given job id is sent to WConfd and the answer is displayed.
A request to list all locks in use, directly or indirectly, is sent to WConfd and the answer is displayed.
A request to list all locks in use, directly or indirectly, together with their respective direct owners is sent to WConfd and the answer is displayed.
A request to ensure that the configuration is fully distributed to the master candidates.