Metadata-Version: 1.1
Name: query-exporter
Version: 1.3.0
Summary: Export Prometheus metrics generated from SQL queries.
Home-page: https://github.com/albertodonato/query-exporter
Author: Alberto Donato
Author-email: alberto.donato@gmail.com
License: GPLv3+
Description-Content-Type: UNKNOWN
Description: query-exporter - Export Prometheus metrics from SQL queries
        ===========================================================
        
        |Latest Version| |Build Status| |Coverage Status|
        
        ``query-exporter`` is a Prometheus_ exporter which allows collecting metrics
        from database queries, at specified time intervals.
        
        It uses SQLAlchemy_ to connect to different database engines, including
        PostgreSQL, MySQL, Oracle and Microsoft SQL Server.
        
        Each query can be run on multiple databases, and update multiple metrics.
        
        The application is called with a configuration file that looks like this:
        
        .. code:: yaml
        
            databases:
              db1:
                dsn: sqlite://
              db2:
                dsn: sqlite://
        
            metrics:
              metric1:
                type: gauge
                description: A sample gauge
              metric2:
                type: summary
                description: A sample summary
              metric3:
                type: histogram
                description: A sample histogram
                buckets: [10, 20, 50, 100, 1000]
        
            queries:
              query1:
                interval: 5
                databases: [db1]
                metrics: [metric1]
                sql: SELECT random() / 1000000000000000
              query2:
                interval: 20
                databases: [db1, db2]
                metrics: [metric2, metric3]
                sql: |
                  SELECT abs(random() / 1000000000000000),
                         abs(random() / 10000000000000000)
        
        The ``dsn`` connection string has the following format::
        
            dialect[+driver]://[username:password][@host:port]/database
        
        (see `SQLAlchemy documentation`_ for details on the available options).
        
        The ``metrics`` list in the query configuration must match values returned by
        the query defined in ``sql``.
        
        The ``interval`` value is interpreted as seconds if no suffix is specified;
        valid suffix are ``s``, ``m``, ``h``, ``d``. Only integer values can be
        specified. If no value is specified (or specified as ``null``), the query is
        executed at every HTTP request.
        
        Queries will usually return a single row, but multiple rows are supported, and
        each row will cause an update of the related metrics.  This is relevant for any
        kind of metric except gauges, which will be effectively updated to the value
        from the last row.
        
        For the configuration above, exported metrics look like this::
        
            # HELP metric1 A sample gauge
            # TYPE metric1 gauge
            metric1{database="db1"} 1549.0
            # HELP metric2 A sample summary
            # TYPE metric2 summary
            metric2_count{database="db2"} 6.0
            metric2_sum{database="db2"} 25329.0
            metric2_count{database="db1"} 6.0
            metric2_sum{database="db1"} 30170.0
            # HELP metric3 A sample histogram
            # TYPE metric3 histogram
            metric3_bucket{database="db2",le="10.0"} 0.0
            metric3_bucket{database="db2",le="20.0"} 1.0
            metric3_bucket{database="db2",le="50.0"} 2.0
            metric3_bucket{database="db2",le="100.0"} 2.0
            metric3_bucket{database="db2",le="1000.0"} 6.0
            metric3_bucket{database="db2",le="+Inf"} 6.0
            metric3_count{database="db2"} 6.0
            metric3_sum{database="db2"} 2542.0
            metric3_bucket{database="db1",le="10.0"} 1.0
            metric3_bucket{database="db1",le="20.0"} 1.0
            metric3_bucket{database="db1",le="50.0"} 1.0
            metric3_bucket{database="db1",le="100.0"} 2.0
            metric3_bucket{database="db1",le="1000.0"} 6.0
            metric3_bucket{database="db1",le="+Inf"} 6.0
            metric3_count{database="db1"} 6.0
            metric3_sum{database="db1"} 2901.0
        
        Metrics are automatically tagged with the ``database`` label so that
        indipendent series are generated for each database.
        
        
        Database engines
        ----------------
        
        SQLAlchemy doesn't depend on specific Python database modules at
        installation. This means additional modules might need to be installed for
        engines in use (e.g. ``psycopg2`` for PostgreSQL or ``MySQL-python`` for
        MySQL).
        
        See `supported databases`_ for details.
        
        
        .. _Prometheus: https://prometheus.io/
        .. _SQLAlchemy: https://www.sqlalchemy.org/
        .. _`SQLAlchemy documentation`:
           http://docs.sqlalchemy.org/en/latest/core/engines.html#database-urls
        .. _`supported databases`:
           http://docs.sqlalchemy.org/en/latest/core/engines.html#supported-databases>
        
        .. |Latest Version| image:: https://img.shields.io/pypi/v/query-exporter.svg
           :target: https://pypi.python.org/pypi/query-exporter
        .. |Build Status| image:: https://img.shields.io/travis/albertodonato/query-exporter.svg
           :target: https://travis-ci.org/albertodonato/query-exporter
        .. |Coverage Status| image:: https://img.shields.io/codecov/c/github/albertodonato/query-exporter/master.svg
           :target: https://codecov.io/gh/albertodonato/query-exporter
        
Keywords: sql metric prometheus exporter
Platform: UNKNOWN
Classifier: Development Status :: 4 - Beta
Classifier: Intended Audience :: System Administrators
Classifier: License :: OSI Approved :: GNU General Public License (GPL)
Classifier: Operating System :: POSIX :: Linux
Classifier: Programming Language :: Python :: 3.5
Classifier: Programming Language :: Python :: 3.6
Classifier: Topic :: Utilities
