What's Changed

Embeddable package

This release switches from the zap logging package to the standard slog.
If the logger was configured by Go programs that import github.com/FerretDB/FerretDB/ferretdb package, they should configure the SLogger field instead.
Setting the old Logger field will make the program panic and make the issue immediately noticeable.

The next release will completely remove zap and rename SLogger to just Logger.

Initial OpenTelemetry tracing support

This release adds initial support for sending OpenTelemetry traces to the OTLP endpoint.
The set of spans and their attributes is not stable yet and will change over time.

All improvements in observability in this release (OpenTelemetry traces, Kubernetes probes, debug archive)
are documented there.

Experimental Systemd configuration in .deb and .rpm packages

This release adds initial unit files for systemd that auto-start FerretDB.
They are likely to change in the future in incompatible ways; for example, we may switch to using a non-root user.

New Features 🎉

• Add Kubernetes liveness probe by @noisersup in #4378
• Add Kubernetes readiness probe by @noisersup in #4426
• Implement Docker healthcheck by @noisersup in #4364
• Add OpenTelemetry traces and spans by @AlekSi in #4477
• Send OpenTelemetry traces and spans to OTLP endpoint by @AlekSi in #4484
• Implement /debug/archive handler by @sachinpuranik in #3895
• Provide systemd unit file in .deb and .rpm packages by @noisersup in #4478

Enhancements 🛠

• Improve support for named loggers by @AlekSi in #4432

Documentation 📄

• Document Kubernetes probes by @AlekSi in #4424
• Refactor and document /debug/archive handler by @AlekSi in #4485
• Document logging by @AlekSi in #4436
• Add release blog post for FerretDB v.1.22.0 by @Fashander in #4401
• Add blog post on running FerretDB and CloudNativePG on Kubernetes by @Fashander in #4377
• Add blogpost on "monitoring FerretDB performance using Coroot" by @Fashander in #4279
• Crush .png images by @AlekSi in #4441
• Remove broken links by @AlekSi in #4433

Other Changes 🤖

• Replace deprecated syntax in Dockerfiles by @AlekSi in #4397
• Update comments about interfaces by @AlekSi in #4405
• Check database name for authentication by @chilagrow in #4402
• Refactor runnables by @AlekSi in #4404
• Add tests for ctxutil.Sigterm by @AlekSi in #4406
• Setup OpenTelemetry exporter for FerretDB by @rumyantseva in #4380
• Extract types and zap code into separate files by @AlekSi in #4408
• Bump Go and deps by @AlekSi in #4416
• Implement Kubernetes startup probe by @noisersup in #4399
• Disable OTEL in tests where collection name might have non-UTF-8 symbols by @rumyantseva in #4423
• Stop Otel exporter gracefully in envtool by @AlekSi in #4425
• Include OpReply error handling by @chilagrow in #4420
• Test authSource by @chilagrow in #4407
• Return connectionStatus command db field by @chilagrow in #4419
• Implement checkswitch to handle regular switches by @PaveenV in #4381
• Cleanup checkswitch handling by @chilagrow in #4434
• Bump deps by @AlekSi in #4446
• Ignore $readPreferences for insert by @AlekSi in #4440
• Readiness probe cleanup by @noisersup in #4447
• Update linters configuration by @AlekSi in #4451
• Add support for named slog loggers by @chilagrow in #4435
• Increase setup timeout in tests by @AlekSi in #4454
• Port pgx logger by @AlekSi in #4450
• Handle authSource in low level driver by @chilagrow in #4449
• Use single definition of order for checkswitch by @chilagrow in #4452
• Clarify the meaning of the passed context by @AlekSi in #4455
• Remove FuncCall by @AlekSi in #4476
• Use slog in clientconn package by @chilagrow in #4457
• Use slog in postgresql backend by @chilagrow in #4466
• Use slog in sqlite backend by @chilagrow in #4467
• Use slog in mysql and hana backends by @chilagrow in #4463
• Use slog in oplog and cursor packages by @chilagrow in #4471
• Use slog in otel by @chilagrow in #4474
• Use slog in debug package by @chilagrow in #4473
• Use slog in integration tests by @chilagrow in #4481
• Use slog in main.go and embedded ferretdb package by @chilagrow in #4462
• Use slog in fsql by @chilagrow in #4464
• Use slog in handler by @chilagrow in #4470
• Use slog in envtool by @chilagrow in #4480
• Implement slog.LogValuer interface for types package by @chilagrow in #4479
• Drop old dependency by @AlekSi in #4486
• Cleanup logging by @chilagrow in #4489

New Contributors

• @PaveenV made their first contribution in #4381

All closed issues and pull requests.
All commits.