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CHANGES for CrateDB Prometheus Adapter

Unreleased

2024-11-11 0.5.2

  • Changed the behavior to ignore samples with identical timestamps but different values during ingestion. This change aligns with Prometheus' behavior, as duplicates should not occur. However, since this enforcement is recent, there may be setups with existing duplicates; thus, we now ignore them to prevent errors.
  • Update Go images to 1.23.
  • Update all deps to latest (prometheus v0.55.1).

2024-01-23 0.5.1

  • Packaging: Re-add compatibility with glibc 2.31, by building on golang:1.20-bullseye.
  • Fixed use of schema configuration setting, it was not honored.

2024-01-12 0.5.0

CHANGES

  • Accept invoking the program without default configuration file config.yml In this case, the program will fall back to the builtin defaults, essentially connecting to localhost:5432 with username crate.
  • Add query timeouts using context cancellation. The corresponding configuration settings are read_timeout and write_timeout.
  • Use a different connection pool for read vs. write operations. The corresponding settings to configure the maximum pool sizes are read_pool_size_max and write_pool_size_max.
  • Accept invocation without default configuration file config.yml.
  • Add command line option -config.make to print a blueprint configuration file to stdout.
  • Use a DSN-style connection string for talking to pgx5.
  • Add program version to startup log message.

DEPENDENCIES

  • Add support for Go 1.20 and 1.21, drop support for previous releases
  • Update dependency packages across the board to their latest or minor patch releases
  • Update Prometheus libraries (client: 1.18, server: 2.48)
  • Update Protocol Buffers libraries (google.golang.org/protobuf 1.31)
  • Update to pgx5 library

BREAKING CHANGES

  • This release removes the default value for the -config.file command line option, which was config.yml. When the option is omitted, the service will use the built-in settings, connecting to CrateDB on localhost:5432.

2021-05-04 0.4.0

BREAKING CHANGES

  • This release changes the toplevel configuration section name to cratedb_endpoints. It is an aftermath of the "naming things" refactorings happening in 0.3.0.

CHANGES

  • Improve network behaviour: Adjust TCP timeout and keepalive settings to mitigate problems that can occur when the adapter in connecting to CrateDB via a load balancer that may drop idle connections in-transparently, such as in AKS. The default values are:

    • KeepAlive: 30 seconds
    • ConnectTimeout: 10 seconds

    The TCP connect timeout can be adjusted by using the -tcp.connect.timeout option.

2021-04-29 0.3.0

BREAKING CHANGES

  • This release changes the program name to cratedb-prometheus-adapter and the default prefix for exported metrics to cratedb_prometheus_adapter_. The latter can be reconfigured using the new -metrics.export.prefix option.

CHANGES

  • Provide a default config.yml in the Docker image, which can be replaced by mounting a file on /etc/cratedb-prometheus-adapter/config.yml.
  • Made Go 1.16 a minimum requirement.
  • Updated project to make use of Go modules instead of Govendor.
  • Renamed the program to cratedb-prometheus-adapter.
  • Renamed the exported metric prefix to cratedb_prometheus_adapter_. It is now, for example, cratedb_prometheus_adapter_write_latency_seconds. Attention: This is a breaking change with respect to your exported metric names. In order to keep the former name, use ./cratedb-prometheus-adapter -metrics.export.prefix=crate_adapter_.

2019-03-06 0.2.1

  • Fixed the translation of prometheus queries using regular expressions (metric_name{job=~"something"}) , so that the generated SQL queries match the proper records in CrateDB.
  • Fixed an issue that caused reads to increment the write metrics instead of the read metrics.

2018-07-10 0.2.0

  • Use Postgres wire protocol (pgx client library) to connect to CrateDB:
    • This change requires CrateDB 3.1.0 or newer!
    • Connections can be configured via crate.yml configuration file using the -config.file flag.
    • Added support for multiple endpoints.

2017-06-11 0.1

  • Unofficial experimental release