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https://github.com/ceph/ceph
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8128045511
This is now for a daemon/asok command, not a module command. Signed-off-by: Sage Weil <sage@redhat.com>
166 lines
8.3 KiB
ReStructuredText
166 lines
8.3 KiB
ReStructuredText
=============
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Influx Module
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=============
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The influx module continuously collects and sends time series data to an
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influxdb database.
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The influx module was introduced in the 13.x *Mimic* release.
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--------
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Enabling
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--------
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To enable the module, use the following command:
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::
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ceph mgr module enable influx
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If you wish to subsequently disable the module, you can use the equivalent
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*disable* command:
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::
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ceph mgr module disable influx
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-------------
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Configuration
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-------------
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For the influx module to send statistics to an InfluxDB server, it
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is necessary to configure the servers address and some authentication
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credentials.
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Set configuration values using the following command:
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::
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ceph config set mgr mgr/influx/<key> <value>
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The most important settings are ``hostname``, ``username`` and ``password``.
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For example, a typical configuration might look like this:
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::
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ceph config set mgr mgr/influx/hostname influx.mydomain.com
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ceph config set mgr mgr/influx/username admin123
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ceph config set mgr mgr/influx/password p4ssw0rd
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Additional optional configuration settings are:
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:interval: Time between reports to InfluxDB. Default 30 seconds.
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:database: InfluxDB database name. Default "ceph". You will need to create this database and grant write privileges to the configured username or the username must have admin privileges to create it.
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:port: InfluxDB server port. Default 8086
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:ssl: Use https connection for InfluxDB server. Use "true" or "false". Default false
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:verify_ssl: Verify https cert for InfluxDB server. Use "true" or "false". Default true
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:threads: How many worker threads should be spawned for sending data to InfluxDB. Default is 5
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:batch_size: How big batches of data points should be when sending to InfluxDB. Default is 5000
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---------
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Debugging
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---------
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By default, a few debugging statements as well as error statements have been set to print in the log files. Users can add more if necessary.
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To make use of the debugging option in the module:
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- Add this to the ceph.conf file.::
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[mgr]
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debug_mgr = 20
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- Use this command ``ceph influx self-test``.
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- Check the log files. Users may find it easier to filter the log files using *mgr[influx]*.
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--------------------
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Interesting counters
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--------------------
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The following tables describe a subset of the values output by
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this module.
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^^^^^
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Pools
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^^^^^
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+---------------+-----------------------------------------------------+
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|Counter | Description |
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+===============+=====================================================+
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|stored | Bytes stored in the pool not including copies |
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+---------------+-----------------------------------------------------+
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|max_avail | Max available number of bytes in the pool |
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+---------------+-----------------------------------------------------+
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|objects | Number of objects in the pool |
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+---------------+-----------------------------------------------------+
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|wr_bytes | Number of bytes written in the pool |
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+---------------+-----------------------------------------------------+
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|dirty | Number of bytes dirty in the pool |
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+---------------+-----------------------------------------------------+
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|rd_bytes | Number of bytes read in the pool |
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+---------------+-----------------------------------------------------+
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|stored_raw | Bytes used in pool including copies made |
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+---------------+-----------------------------------------------------+
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^^^^
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OSDs
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^^^^
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+------------+------------------------------------+
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|Counter | Description |
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+============+====================================+
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|op_w | Client write operations |
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+------------+------------------------------------+
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|op_in_bytes | Client operations total write size |
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+------------+------------------------------------+
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|op_r | Client read operations |
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+------------+------------------------------------+
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|op_out_bytes| Client operations total read size |
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+------------+------------------------------------+
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+------------------------+--------------------------------------------------------------------------+
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|Counter | Description |
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+========================+==========================================================================+
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|op_wip | Replication operations currently being processed (primary) |
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+------------------------+--------------------------------------------------------------------------+
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|op_latency | Latency of client operations (including queue time) |
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+------------------------+--------------------------------------------------------------------------+
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|op_process_latency | Latency of client operations (excluding queue time) |
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+------------------------+--------------------------------------------------------------------------+
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|op_prepare_latency | Latency of client operations (excluding queue time and wait for finished)|
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+------------------------+--------------------------------------------------------------------------+
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|op_r_latency | Latency of read operation (including queue time) |
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+------------------------+--------------------------------------------------------------------------+
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|op_r_process_latency | Latency of read operation (excluding queue time) |
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+------------------------+--------------------------------------------------------------------------+
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|op_w_in_bytes | Client data written |
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+------------------------+--------------------------------------------------------------------------+
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|op_w_latency | Latency of write operation (including queue time) |
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+------------------------+--------------------------------------------------------------------------+
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|op_w_process_latency | Latency of write operation (excluding queue time) |
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+------------------------+--------------------------------------------------------------------------+
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|op_w_prepare_latency | Latency of write operations (excluding queue time and wait for finished) |
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+------------------------+--------------------------------------------------------------------------+
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|op_rw | Client read-modify-write operations |
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+------------------------+--------------------------------------------------------------------------+
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|op_rw_in_bytes | Client read-modify-write operations write in |
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+------------------------+--------------------------------------------------------------------------+
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|op_rw_out_bytes | Client read-modify-write operations read out |
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+------------------------+--------------------------------------------------------------------------+
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|op_rw_latency | Latency of read-modify-write operation (including queue time) |
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+------------------------+--------------------------------------------------------------------------+
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|op_rw_process_latency | Latency of read-modify-write operation (excluding queue time) |
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+------------------------+--------------------------------------------------------------------------+
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|op_rw_prepare_latency | Latency of read-modify-write operations (excluding queue time |
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| | and wait for finished) |
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+------------------------+--------------------------------------------------------------------------+
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|op_before_queue_op_lat | Latency of IO before calling queue (before really queue into ShardedOpWq)|
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| | op_before_dequeue_op_lat |
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+------------------------+--------------------------------------------------------------------------+
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|op_before_dequeue_op_lat| Latency of IO before calling dequeue_op(already dequeued and get PG lock)|
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+------------------------+--------------------------------------------------------------------------+
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Latency counters are measured in microseconds unless otherwise specified in the description.
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