Cratedb Prometheus Adapter Versions Save

What's Changed

• 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.

Details

• CI: Start providing OCI images for the ARM architecture by @amotl in https://github.com/crate/cratedb-prometheus-adapter/pull/114
• Tests: Integration tests to verify query expressions end-to-end by @amotl in https://github.com/crate/cratedb-prometheus-adapter/pull/115
• Packaging: Re-add compatibility with glibc 2.31 by @amotl in https://github.com/crate/cratedb-prometheus-adapter/pull/122
• Fix use of schema configuration setting, it was not honored by @amotl in https://github.com/crate/cratedb-prometheus-adapter/pull/117
• Chore(deps): Bump github.com/jackc/pgx/v5 from 5.5.1 to 5.5.2 by @dependabot in https://github.com/crate/cratedb-prometheus-adapter/pull/118
• Chore(deps): Bump github.com/jackc/pgtype from 1.14.0 to 1.14.1 by @dependabot in https://github.com/crate/cratedb-prometheus-adapter/pull/119
• Chore(deps): Bump github.com/prometheus/common from 0.45.0 to 0.46.0 by @dependabot in https://github.com/crate/cratedb-prometheus-adapter/pull/120
• Chore: Development sandbox Docker Compose configuration; Tests: Fix PROMETHEUS_URL; deactivate failing test; Misc. by @amotl in https://github.com/crate/cratedb-prometheus-adapter/pull/116

Full Changelog: https://github.com/crate/cratedb-prometheus-adapter/compare/0.5.0...0.5.1

What's Changed

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.

Full Changelog: https://github.com/crate/cratedb-prometheus-adapter/compare/0.4.0...0.5.0

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.

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 <https://golang.org/ref/mod>_ 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_.

• 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.

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CHANGES

• 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.

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