generated: '2026-07-21'
method: searched
source: https://developer.upsun.com/changelog
name: Upsun Changelog
scheme: dated entries (no product version numbers; platform features + runtime image releases)
feed: https://developer.upsun.com/changelog
community: https://community.upsun.com/
entries:
  - date: '2026-06-08'
    kind: feature
    breaking: false
    title: Task containers, now in prerelease access
    highlights:
      - Ephemeral, API-triggered containers for run-to-completion workloads (batch jobs, migrations, background AI agents)
      - Available on Upsun Flex as a prerelease
  - date: '2026-05-26'
    kind: image
    breaking: false
    title: RabbitMQ 4.2 is now available
    highlights:
      - Quorum queues support single active consumer
      - Stream performance and observability improvements
  - date: '2026-05-13'
    kind: image
    breaking: true
    title: Solr 10.0 is now available
    highlights:
      - Expanded vector search (scalar/binary quantized dense vectors), optional GPU acceleration
      - Java 21 support, Jetty 12, OpenTelemetry migration
      - Major release with breaking changes and removed legacy components
  - date: '2026-04-24'
    kind: system
    breaking: false
    title: New status page is live at status.upsun.com
    highlights:
      - Status page moved to status.upsun.com with new RSS feed; resubscribe required
  - date: '2026-03-17'
    kind: feature
    breaking: false
    title: CPU & RAM autoscaling for workers
    highlights:
      - Horizontal autoscaling for worker instances on Upsun Flex, configurable via Console, CLI, and API
  - date: '2026-03-06'
    kind: image
    breaking: false
    title: Elasticsearch Enterprise 8.19
    highlights:
      - ES|QL pipe-based querying, ELSER semantic search, BBQ vector memory reduction, logsdb mode
      - Available as a Premium Service
  - date: '2026-03-05'
    kind: image
    breaking: false
    title: FrankenPHP support
    highlights:
      - High-performance alternative to PHP-FPM; Classic and Worker modes; Blackfire profiling supported
  - date: '2026-03-04'
    kind: image
    breaking: false
    title: .NET 10 (LTS) is now available
    highlights:
      - C# 14, ASP.NET Core 10, Native AOT, post-quantum cryptography support
  - date: '2026-03-03'
    kind: image
    breaking: false
    title: Real-time updates with Mercure
    highlights:
      - Managed Mercure Hub image for server-sent events with JWT authorization
  - date: '2026-03-02'
    kind: image
    breaking: false
    title: Nix 25.11 available for Composable Images
    highlights:
      - Latest Nix stable channel for Composable Image configurations
  - date: '2026-02-10'
    kind: image
    breaking: false
    title: Ruby 4.0 support
    highlights:
      - Ruby Box (experimental), ZJIT compiler, Ractor enhancements
  - date: '2026-02-09'
    kind: image
    breaking: false
    title: Python 3.14 now available
    highlights:
      - Concurrent subinterpreters, UUID6-8, t-strings
  - date: '2026-02-02'
    kind: feature
    breaking: false
    title: App-specific environment variables
    highlights:
      - Variables scoped to individual apps; scoped rebuild/redeploy; Console, CLI, and API on Upsun Flex
  - date: '2025-12-19'
    kind: image
    breaking: false
    title: Valkey 8.1
    highlights:
      - New hash table design, better I/O threading, improved replication and observability