v9.0.0

[mishamyte]

🚀 The reasons behind v9 - a ground-up rewrite

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v9 is a ground-up rewrite of the sink on Serilog 4.x native batching, with a streaming serialization pipeline. On the common workload it allocates ~55× less and runs ~4.5× faster than v8 - see Benchmarks.

Implemented:

• Add support for actual structured metadata
• Support the work with Serilog's properties TraceId & SpanId
• Change queueLimit from infinity to prevent OutOfMemoryException
• Loki Url is not validated on bootstrap
• Pluggable exception serialization via ILokiExceptionFormatter

Fixed:

• Exception while emitting periodic batch from LokiSink
• Level property keeps getting renamed and added to the LokiLogEvent if the grafana server is down
• Handling of Serilog.Events.LogEvent in LokiBatchFormatter is not thread-safe
• Tenant RegExpression is not valid for valid X-Scope-OrgID header values
• Property doesn't render correctly if property, used as a part of it is mapped to the label
• Message template is not updated while property renaming
• Default value of period is not corresponding the XML-doc

Breaking changes:

• Targets net8.0, net9.0, net10.0 (all earlier TFMs are EOL); requires Serilog 4.3.1+; FSharp.Core becomes a transitive dependency
• batchPostingLimit → batchSizeLimit; queueLimit is now bounded by default (50 000)
• Removed IReservedPropertyRenamingStrategy / reservedPropertyRenamingStrategy, useInternalTimestamp, leavePropertiesIntact
• Removed the ILokiHttpClient hierarchy (LokiHttpClient, LokiGzipHttpClient) - inject a standard HttpClient or HttpMessageHandler; gzip is a DelegatingHandler concern
• Fatal is rendered as fatal (was critical) - update dashboards/alerts
• Properties promoted via propertiesAsLabels are also kept in the log body; reserved body keys are prefixed with _
• uri and tenant are validated at startup (throw ArgumentException)

📚 Before upgrading, please read Upgrading from v8 to v9 and Breaking changes.

Full Changelog: v8.3.2...v9.0.0

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This discussion was created from the release v9.0.0.