mirror of
https://github.com/ceph/ceph
synced 2024-12-22 03:22:00 +00:00
560 lines
15 KiB
ReStructuredText
560 lines
15 KiB
ReStructuredText
=======================
|
|
Logging and Debugging
|
|
=======================
|
|
|
|
Typically, when you add debugging to your Ceph configuration, you do so at
|
|
runtime. You can also add Ceph debug logging to your Ceph configuration file if
|
|
you are encountering issues when starting your cluster. You may view Ceph log
|
|
files under ``/var/log/ceph`` (the default location).
|
|
|
|
.. tip:: When debug output slows down your system, the latency can hide
|
|
race conditions.
|
|
|
|
Logging is resource intensive. If you are encountering a problem in a specific
|
|
area of your cluster, enable logging for that area of the cluster. For example,
|
|
if your OSDs are running fine, but your metadata servers are not, you should
|
|
start by enabling debug logging for the specific metadata server instance(s)
|
|
giving you trouble. Enable logging for each subsystem as needed.
|
|
|
|
.. important:: Verbose logging can generate over 1GB of data per hour. If your
|
|
OS disk reaches its capacity, the node will stop working.
|
|
|
|
If you enable or increase the rate of Ceph logging, ensure that you have
|
|
sufficient disk space on your OS disk. See `Accelerating Log Rotation`_ for
|
|
details on rotating log files. When your system is running well, remove
|
|
unnecessary debugging settings to ensure your cluster runs optimally. Logging
|
|
debug output messages is relatively slow, and a waste of resources when
|
|
operating your cluster.
|
|
|
|
See `Subsystem, Log and Debug Settings`_ for details on available settings.
|
|
|
|
Runtime
|
|
=======
|
|
|
|
If you would like to see the configuration settings at runtime, you must log
|
|
in to a host with a running daemon and execute the following::
|
|
|
|
ceph daemon {daemon-name} config show | less
|
|
|
|
For example,::
|
|
|
|
ceph daemon osd.0 config show | less
|
|
|
|
To activate Ceph's debugging output (*i.e.*, ``dout()``) at runtime, use the
|
|
``ceph tell`` command to inject arguments into the runtime configuration::
|
|
|
|
ceph tell {daemon-type}.{daemon id or *} injectargs --{name} {value} [--{name} {value}]
|
|
|
|
Replace ``{daemon-type}`` with one of ``osd``, ``mon`` or ``mds``. You may apply
|
|
the runtime setting to all daemons of a particular type with ``*``, or specify
|
|
a specific daemon's ID. For example, to increase
|
|
debug logging for a ``ceph-osd`` daemon named ``osd.0``, execute the following::
|
|
|
|
ceph tell osd.0 injectargs --debug-osd 0/5
|
|
|
|
The ``ceph tell`` command goes through the monitors. If you cannot bind to the
|
|
monitor, you can still make the change by logging into the host of the daemon
|
|
whose configuration you'd like to change using ``ceph daemon``.
|
|
For example::
|
|
|
|
sudo ceph daemon osd.0 config set debug_osd 0/5
|
|
|
|
See `Subsystem, Log and Debug Settings`_ for details on available settings.
|
|
|
|
|
|
Boot Time
|
|
=========
|
|
|
|
To activate Ceph's debugging output (*i.e.*, ``dout()``) at boot time, you must
|
|
add settings to your Ceph configuration file. Subsystems common to each daemon
|
|
may be set under ``[global]`` in your configuration file. Subsystems for
|
|
particular daemons are set under the daemon section in your configuration file
|
|
(*e.g.*, ``[mon]``, ``[osd]``, ``[mds]``). For example::
|
|
|
|
[global]
|
|
debug ms = 1/5
|
|
|
|
[mon]
|
|
debug mon = 20
|
|
debug paxos = 1/5
|
|
debug auth = 2
|
|
|
|
[osd]
|
|
debug osd = 1/5
|
|
debug filestore = 1/5
|
|
debug journal = 1
|
|
debug monc = 5/20
|
|
|
|
[mds]
|
|
debug mds = 1
|
|
debug mds balancer = 1
|
|
debug mds log = 1
|
|
debug mds migrator = 1
|
|
|
|
|
|
See `Subsystem, Log and Debug Settings`_ for details.
|
|
|
|
|
|
Accelerating Log Rotation
|
|
=========================
|
|
|
|
If your OS disk is relatively full, you can accelerate log rotation by modifying
|
|
the Ceph log rotation file at ``/etc/logrotate.d/ceph``. Add a size setting
|
|
after the rotation frequency to accelerate log rotation (via cronjob) if your
|
|
logs exceed the size setting. For example, the default setting looks like
|
|
this::
|
|
|
|
rotate 7
|
|
weekly
|
|
compress
|
|
sharedscripts
|
|
|
|
Modify it by adding a ``size`` setting. ::
|
|
|
|
rotate 7
|
|
weekly
|
|
size 500M
|
|
compress
|
|
sharedscripts
|
|
|
|
Then, start the crontab editor for your user space. ::
|
|
|
|
crontab -e
|
|
|
|
Finally, add an entry to check the ``etc/logrotate.d/ceph`` file. ::
|
|
|
|
30 * * * * /usr/sbin/logrotate /etc/logrotate.d/ceph >/dev/null 2>&1
|
|
|
|
The preceding example checks the ``etc/logrotate.d/ceph`` file every 30 minutes.
|
|
|
|
|
|
Valgrind
|
|
========
|
|
|
|
Debugging may also require you to track down memory and threading issues.
|
|
You can run a single daemon, a type of daemon, or the whole cluster with
|
|
Valgrind. You should only use Valgrind when developing or debugging Ceph.
|
|
Valgrind is computationally expensive, and will slow down your system otherwise.
|
|
Valgrind messages are logged to ``stderr``.
|
|
|
|
|
|
Subsystem, Log and Debug Settings
|
|
=================================
|
|
|
|
In most cases, you will enable debug logging output via subsystems.
|
|
|
|
Ceph Subsystems
|
|
---------------
|
|
|
|
Each subsystem has a logging level for its output logs, and for its logs
|
|
in-memory. You may set different values for each of these subsystems by setting
|
|
a log file level and a memory level for debug logging. Ceph's logging levels
|
|
operate on a scale of ``1`` to ``20``, where ``1`` is terse and ``20`` is
|
|
verbose [#]_ . In general, the logs in-memory are not sent to the output log unless:
|
|
|
|
- a fatal signal is raised or
|
|
- an ``assert`` in source code is triggered or
|
|
- upon requested. Please consult `document on admin socket <http://docs.ceph.com/docs/master/man/8/ceph/#daemon>`_ for more details.
|
|
|
|
A debug logging setting can take a single value for the log level and the
|
|
memory level, which sets them both as the same value. For example, if you
|
|
specify ``debug ms = 5``, Ceph will treat it as a log level and a memory level
|
|
of ``5``. You may also specify them separately. The first setting is the log
|
|
level, and the second setting is the memory level. You must separate them with
|
|
a forward slash (/). For example, if you want to set the ``ms`` subsystem's
|
|
debug logging level to ``1`` and its memory level to ``5``, you would specify it
|
|
as ``debug ms = 1/5``. For example:
|
|
|
|
|
|
|
|
.. code-block:: ini
|
|
|
|
debug {subsystem} = {log-level}/{memory-level}
|
|
#for example
|
|
debug mds log = 1/20
|
|
|
|
|
|
The following table provides a list of Ceph subsystems and their default log and
|
|
memory levels. Once you complete your logging efforts, restore the subsystems
|
|
to their default level or to a level suitable for normal operations.
|
|
|
|
|
|
+--------------------+-----------+--------------+
|
|
| Subsystem | Log Level | Memory Level |
|
|
+====================+===========+==============+
|
|
| ``default`` | 0 | 5 |
|
|
+--------------------+-----------+--------------+
|
|
| ``lockdep`` | 0 | 5 |
|
|
+--------------------+-----------+--------------+
|
|
| ``context`` | 0 | 5 |
|
|
+--------------------+-----------+--------------+
|
|
| ``crush`` | 1 | 5 |
|
|
+--------------------+-----------+--------------+
|
|
| ``mds`` | 1 | 5 |
|
|
+--------------------+-----------+--------------+
|
|
| ``mds balancer`` | 1 | 5 |
|
|
+--------------------+-----------+--------------+
|
|
| ``mds locker`` | 1 | 5 |
|
|
+--------------------+-----------+--------------+
|
|
| ``mds log`` | 1 | 5 |
|
|
+--------------------+-----------+--------------+
|
|
| ``mds log expire`` | 1 | 5 |
|
|
+--------------------+-----------+--------------+
|
|
| ``mds migrator`` | 1 | 5 |
|
|
+--------------------+-----------+--------------+
|
|
| ``buffer`` | 0 | 0 |
|
|
+--------------------+-----------+--------------+
|
|
| ``timer`` | 0 | 5 |
|
|
+--------------------+-----------+--------------+
|
|
| ``filer`` | 0 | 5 |
|
|
+--------------------+-----------+--------------+
|
|
| ``objecter`` | 0 | 0 |
|
|
+--------------------+-----------+--------------+
|
|
| ``rados`` | 0 | 5 |
|
|
+--------------------+-----------+--------------+
|
|
| ``rbd`` | 0 | 5 |
|
|
+--------------------+-----------+--------------+
|
|
| ``journaler`` | 0 | 5 |
|
|
+--------------------+-----------+--------------+
|
|
| ``objectcacher`` | 0 | 5 |
|
|
+--------------------+-----------+--------------+
|
|
| ``client`` | 0 | 5 |
|
|
+--------------------+-----------+--------------+
|
|
| ``osd`` | 0 | 5 |
|
|
+--------------------+-----------+--------------+
|
|
| ``optracker`` | 0 | 5 |
|
|
+--------------------+-----------+--------------+
|
|
| ``objclass`` | 0 | 5 |
|
|
+--------------------+-----------+--------------+
|
|
| ``filestore`` | 1 | 5 |
|
|
+--------------------+-----------+--------------+
|
|
| ``journal`` | 1 | 5 |
|
|
+--------------------+-----------+--------------+
|
|
| ``ms`` | 0 | 5 |
|
|
+--------------------+-----------+--------------+
|
|
| ``mon`` | 1 | 5 |
|
|
+--------------------+-----------+--------------+
|
|
| ``monc`` | 0 | 5 |
|
|
+--------------------+-----------+--------------+
|
|
| ``paxos`` | 0 | 5 |
|
|
+--------------------+-----------+--------------+
|
|
| ``tp`` | 0 | 5 |
|
|
+--------------------+-----------+--------------+
|
|
| ``auth`` | 1 | 5 |
|
|
+--------------------+-----------+--------------+
|
|
| ``finisher`` | 1 | 5 |
|
|
+--------------------+-----------+--------------+
|
|
| ``heartbeatmap`` | 1 | 5 |
|
|
+--------------------+-----------+--------------+
|
|
| ``perfcounter`` | 1 | 5 |
|
|
+--------------------+-----------+--------------+
|
|
| ``rgw`` | 1 | 5 |
|
|
+--------------------+-----------+--------------+
|
|
| ``javaclient`` | 1 | 5 |
|
|
+--------------------+-----------+--------------+
|
|
| ``asok`` | 1 | 5 |
|
|
+--------------------+-----------+--------------+
|
|
| ``throttle`` | 1 | 5 |
|
|
+--------------------+-----------+--------------+
|
|
|
|
|
|
Logging Settings
|
|
----------------
|
|
|
|
Logging and debugging settings are not required in a Ceph configuration file,
|
|
but you may override default settings as needed. Ceph supports the following
|
|
settings:
|
|
|
|
|
|
``log file``
|
|
|
|
:Description: The location of the logging file for your cluster.
|
|
:Type: String
|
|
:Required: No
|
|
:Default: ``/var/log/ceph/$cluster-$name.log``
|
|
|
|
|
|
``log max new``
|
|
|
|
:Description: The maximum number of new log files.
|
|
:Type: Integer
|
|
:Required: No
|
|
:Default: ``1000``
|
|
|
|
|
|
``log max recent``
|
|
|
|
:Description: The maximum number of recent events to include in a log file.
|
|
:Type: Integer
|
|
:Required: No
|
|
:Default: ``1000000``
|
|
|
|
|
|
``log to stderr``
|
|
|
|
:Description: Determines if logging messages should appear in ``stderr``.
|
|
:Type: Boolean
|
|
:Required: No
|
|
:Default: ``true``
|
|
|
|
|
|
``err to stderr``
|
|
|
|
:Description: Determines if error messages should appear in ``stderr``.
|
|
:Type: Boolean
|
|
:Required: No
|
|
:Default: ``true``
|
|
|
|
|
|
``log to syslog``
|
|
|
|
:Description: Determines if logging messages should appear in ``syslog``.
|
|
:Type: Boolean
|
|
:Required: No
|
|
:Default: ``false``
|
|
|
|
|
|
``err to syslog``
|
|
|
|
:Description: Determines if error messages should appear in ``syslog``.
|
|
:Type: Boolean
|
|
:Required: No
|
|
:Default: ``false``
|
|
|
|
|
|
``log flush on exit``
|
|
|
|
:Description: Determines if Ceph should flush the log files after exit.
|
|
:Type: Boolean
|
|
:Required: No
|
|
:Default: ``true``
|
|
|
|
|
|
``clog to monitors``
|
|
|
|
:Description: Determines if ``clog`` messages should be sent to monitors.
|
|
:Type: Boolean
|
|
:Required: No
|
|
:Default: ``true``
|
|
|
|
|
|
``clog to syslog``
|
|
|
|
:Description: Determines if ``clog`` messages should be sent to syslog.
|
|
:Type: Boolean
|
|
:Required: No
|
|
:Default: ``false``
|
|
|
|
|
|
``mon cluster log to syslog``
|
|
|
|
:Description: Determines if the cluster log should be output to the syslog.
|
|
:Type: Boolean
|
|
:Required: No
|
|
:Default: ``false``
|
|
|
|
|
|
``mon cluster log file``
|
|
|
|
:Description: The location of the cluster's log file.
|
|
:Type: String
|
|
:Required: No
|
|
:Default: ``/var/log/ceph/$cluster.log``
|
|
|
|
|
|
|
|
OSD
|
|
---
|
|
|
|
|
|
``osd debug drop ping probability``
|
|
|
|
:Description: ?
|
|
:Type: Double
|
|
:Required: No
|
|
:Default: 0
|
|
|
|
|
|
``osd debug drop ping duration``
|
|
|
|
:Description:
|
|
:Type: Integer
|
|
:Required: No
|
|
:Default: 0
|
|
|
|
``osd debug drop pg create probability``
|
|
|
|
:Description:
|
|
:Type: Integer
|
|
:Required: No
|
|
:Default: 0
|
|
|
|
``osd debug drop pg create duration``
|
|
|
|
:Description: ?
|
|
:Type: Double
|
|
:Required: No
|
|
:Default: 1
|
|
|
|
``osd preserve trimmed log``
|
|
|
|
:Description: Preserves trimmed logs after trimming.
|
|
:Type: Boolean
|
|
:Required: No
|
|
:Default: ``false``
|
|
|
|
|
|
``osd tmapput sets uses tmap``
|
|
|
|
:Description: Uses ``tmap``. For debug only.
|
|
:Type: Boolean
|
|
:Required: No
|
|
:Default: ``false``
|
|
|
|
|
|
``osd min pg log entries``
|
|
|
|
:Description: The minimum number of log entries for placement groups.
|
|
:Type: 32-bit Unsigned Integer
|
|
:Required: No
|
|
:Default: 1000
|
|
|
|
|
|
``osd op log threshold``
|
|
|
|
:Description: How many op log messages to show up in one pass.
|
|
:Type: Integer
|
|
:Required: No
|
|
:Default: 5
|
|
|
|
|
|
|
|
Filestore
|
|
---------
|
|
|
|
``filestore debug omap check``
|
|
|
|
:Description: Debugging check on synchronization. This is an expensive operation.
|
|
:Type: Boolean
|
|
:Required: No
|
|
:Default: 0
|
|
|
|
|
|
MDS
|
|
---
|
|
|
|
|
|
``mds debug scatterstat``
|
|
|
|
:Description: Ceph will assert that various recursive stat invariants are true
|
|
(for developers only).
|
|
|
|
:Type: Boolean
|
|
:Required: No
|
|
:Default: ``false``
|
|
|
|
|
|
``mds debug frag``
|
|
|
|
:Description: Ceph will verify directory fragmentation invariants when
|
|
convenient (developers only).
|
|
|
|
:Type: Boolean
|
|
:Required: No
|
|
:Default: ``false``
|
|
|
|
|
|
``mds debug auth pins``
|
|
|
|
:Description: The debug auth pin invariants (for developers only).
|
|
:Type: Boolean
|
|
:Required: No
|
|
:Default: ``false``
|
|
|
|
|
|
``mds debug subtrees``
|
|
|
|
:Description: The debug subtree invariants (for developers only).
|
|
:Type: Boolean
|
|
:Required: No
|
|
:Default: ``false``
|
|
|
|
|
|
|
|
RADOS Gateway
|
|
-------------
|
|
|
|
|
|
``rgw log nonexistent bucket``
|
|
|
|
:Description: Should we log a non-existent buckets?
|
|
:Type: Boolean
|
|
:Required: No
|
|
:Default: ``false``
|
|
|
|
|
|
``rgw log object name``
|
|
|
|
:Description: Should an object's name be logged. // man date to see codes (a subset are supported)
|
|
:Type: String
|
|
:Required: No
|
|
:Default: ``%Y-%m-%d-%H-%i-%n``
|
|
|
|
|
|
``rgw log object name utc``
|
|
|
|
:Description: Object log name contains UTC?
|
|
:Type: Boolean
|
|
:Required: No
|
|
:Default: ``false``
|
|
|
|
|
|
``rgw enable ops log``
|
|
|
|
:Description: Enables logging of every RGW operation.
|
|
:Type: Boolean
|
|
:Required: No
|
|
:Default: ``true``
|
|
|
|
|
|
``rgw enable usage log``
|
|
|
|
:Description: Enable logging of RGW's bandwidth usage.
|
|
:Type: Boolean
|
|
:Required: No
|
|
:Default: ``true``
|
|
|
|
|
|
``rgw usage log flush threshold``
|
|
|
|
:Description: Threshold to flush pending log data.
|
|
:Type: Integer
|
|
:Required: No
|
|
:Default: ``1024``
|
|
|
|
|
|
``rgw usage log tick interval``
|
|
|
|
:Description: Flush pending log data every ``s`` seconds.
|
|
:Type: Integer
|
|
:Required: No
|
|
:Default: 30
|
|
|
|
|
|
``rgw intent log object name``
|
|
|
|
:Description:
|
|
:Type: String
|
|
:Required: No
|
|
:Default: ``%Y-%m-%d-%i-%n``
|
|
|
|
|
|
``rgw intent log object name utc``
|
|
|
|
:Description: Include a UTC timestamp in the intent log object name.
|
|
:Type: Boolean
|
|
:Required: No
|
|
:Default: ``false``
|
|
|
|
.. [#] there are levels >20 in some rare cases and that they are extremely verbose.
|