OpenStack cross service/project profiler
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README.rst

Enabling OSProfiler using DevStack

This directory contains the files necessary to run OpenStack with enabled OSProfiler in DevStack.

OSProfiler can send trace data into different collectors. There are 2 parameters that control this:

  • OSPROFILER_COLLECTOR specifies which collector to install in DevStack. By default OSProfiler plugin does not install anything, thus default messaging driver will be used.

    Possible values:

    • <empty> - default messaging driver is used
    • redis - Redis is installed
    • jaeger - Jaeger is installed
    • sqlalchemy - SQLAlchemy driver is installed

    The default value of OSPROFILER_CONNECTION_STRING is set automatically depending on OSPROFILER_COLLECTOR value.

  • OSPROFILER_CONNECTION_STRING specifies which driver is used by OSProfiler.

    Possible values:

    • messaging:// - use messaging as trace collector (with the transport configured by oslo.messaging)
    • redis://[:password]@host[:port][/db] - use Redis as trace storage
    • elasticsearch://host:port - use Elasticsearch as trace storage
    • mongodb://host:port - use MongoDB as trace storage
    • loginsight://username:password@host - use LogInsight as trace collector/storage
    • jaeger://host:port - use Jaeger as trace collector
    • mysql+pymysql://username:password@host/profiler?charset=utf8 - use SQLAlchemy driver with MySQL database

To configure DevStack and enable OSProfiler edit ${DEVSTACK_DIR}/local.conf file and add the following to [[local|localrc]] section:

  • to use Redis collector:

    enable_plugin osprofiler https://opendev.org/openstack/osprofiler master
    OSPROFILER_COLLECTOR=redis

    OSProfiler plugin will install Redis and configure OSProfiler to use Redis driver

  • to use specified driver:

    enable_plugin osprofiler https://opendev.org/openstack/osprofiler master
    OSPROFILER_CONNECTION_STRING=<connection string value>

    the driver is chosen depending on the value of OSPROFILER_CONNECTION_STRING variable (refer to the next section for details)

Run DevStack as normal:

$ ./stack.sh

Config variables

OSPROFILER_HMAC_KEYS - a set of HMAC secrets, that are used for triggering of profiling in OpenStack services: only the requests that specify one of these keys in HTTP headers will be profiled. E.g. multiple secrets are specified as a comma-separated list of string values:

OSPROFILER_HMAC_KEYS=swordfish,foxtrot,charlie

OSPROFILER_CONNECTION_STRING - connection string to identify the driver. Default value is messaging:// refers to messaging driver. For a full list of drivers please refer to https://opendev.org/openstack/osprofiler/src/branch/master/osprofiler/drivers. Example: enable ElasticSearch driver with the server running on localhost:

OSPROFILER_CONNECTION_STRING=elasticsearch://127.0.0.1:9200

OSPROFILER_COLLECTOR - controls which collector to install into DevStack. The driver is then chosen automatically based on the collector. Empty value assumes that the default messaging driver is used. Example: enable Redis collector:

OSPROFILER_COLLECTOR=redis

OSPROFILER_TRACE_SQLALCHEMY - controls tracing of SQL statements. If enabled, all SQL statements processed by SQL Alchemy are added into traces. By default enabled. Example: disable SQL statements tracing:

OSPROFILER_TRACE_SQLALCHEMY=False