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v2.2.0 - 2020-03-16

  • Validate that metric names don't collide with builtin ones.
  • Perform database connect/disconnect under lock (#28).
  • Add support for queries to run at connection (#31).
  • [snap,docker] Support IBM DB2 (#14).

v2.1.0 - 2020-02-29

  • When validating config, warn about database and metrics that are not used in any query.
  • Support extra per-database labels for metrics. All databases must define the same set of labels (#27).

v2.0.2 - 2020-02-15

  • Don't disable queries failing because of OperationalError as it might not be a fatal error (#25).

v2.0.1 - 2020-02-07

  • Fix validation for entries in the queries section for config file.
  • [snap,docker] Add MSSQL support.

v2.0.0 - 2020-02-02

  • Support only named parameters (e.g.: :param) in queries (#21, #24).
  • Add JSON-schema validation for config file (#23).
  • Validate at startup if database engines from DSNs are supported and corresponding modules are available.
  • Check that names for queries parameters match the ones in queries SQL.
  • Add --check-only command line option to just validate configuration.
  • Drop support for matching query columns positionally, only support name match. This is to avoid confusing behavior with positional match, and make queries more explicit.
NOTE:

some of the changes above for query definitions are backwards incompatible, thus queries might need updating. Specifically:

  • Only named parameters with the :param style are now supported, queries using positional parameters or other styles of named parameters need to be udpated.
  • Literal : at the beginning of a word need to be escaped (with backslash) to avoid confusion with parameter markers. Colons that appear inside words don't need to be escaped.
  • Column names for query results must now always match metric and label names involved in the query. Position-based match for queries without labels is no longer supported. Queries can be updated adding AS <metric_name|label_name> expressions.

v1.9.3 - 2019-12-29

  • Convert Decimal query results to float (#19).

v1.9.2 - 2019-12-24

  • Fix failure when multiple query columns have the same name (#18).
  • [docker] Add Dockerfile (#17).

v1.9.1 - 2019-11-26

  • Track doomed queries on a per-database basis (#16).
  • Add --version option.

v1.9.0 - 2019-11-03

  • Support passing sets of parameters for queries.

v1.8.1 - 2019-07-14

  • Enable autocommit on connection (#10).

v1.8.0 - 2019-05-25

  • Support custom labels in metrics, setting values from queries result (#7).
  • Suport matching metrics by query result column name instead of order.
  • Disable queries that will certainly always fail (e.g. because of invalid. returned column names/number) (#6).
  • Support disconnecting from after each query (#8).
  • Rework tests to use actualy SQLite in-memory databases instead of fakes.

v1.7.0 - 2019-04-07

  • Add a queries and database_errors metrics lebeled by database (#1).
  • Support database DSNs defined as env:<VARNAME> to supply the dns from the environment (#5).

v1.6.0 - 2019-03-26

  • Change default port to 9560 (to make it unique).

v1.5.0 - 2018-12-28

  • Drop support for Python 3.5.
  • Add support for enum metrics.
  • [snap] Add initial snap support.
  • Rework project setup and use pytest.

v1.4.0 - 2018-06-08

  • Support for python3.7.
  • Use asynctest for asyncronous tests.
  • Updated toolrack dependency.

v1.3.0 - 2018-02-20

  • Support aperiodic queries, which are run at every request for the metrics endpoint.

v1.2.2 - 2017-10-25

  • Fix tests for latest prometheus_aioexporter.

v1.2.1 - 2017-10-25

  • Documentation cleanups (and conversion to reST).

v1.2.0 - 2017-06-30

  • Switch to SQLAlchemy. Multiple database engines are now supported.
  • Needed database libraries must now be installed separately, as there is no explicit dependency in SQLAlchemy.

v1.1.0 - 2017-05-21

  • Use connection pools for queries.

v1.0.0 - 2017-05-13

  • Replace aiopg with asyncpg. The database dsn string is now specified as a postgres:// URI.

v0.1.2 - 2017-05-07

  • Replace Makefile with tox.

v0.1.1 - 2017-03-07

  • Fix setup.py issues.

v0.1.0 - 2017-03-07

  • First release.