Introducing Charmed Temporal 1.31

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Introducing Charmed Temporal 1.31

The Canonical Workflows team is pleased to announce the stable release of Charmed Temporal 1.31, now available on Charmhub through the 1.31/stable channel.

This release brings Charmed Temporal to version 1.31, with an updated Ubuntu base, improvements to security and workflow management, and a supported upgrade path from Charmed Temporal 1.23.

What’s new

Highlights

  • Temporal 1.31 support: Updated Temporal Server, Temporal UI and Admin charms, bringing the Charmed Temporal solution to version 1.31.

  • Ubuntu 26.04 LTS: Temporal Server, Admin, and UI now support Ubuntu 26.04, providing an updated operating system foundation.

  • Improved TLS integration: Enhanced TLS-aware connectivity between Temporal Server and the UI and Worker charms.

  • Enhanced workflow management: Additional UI configuration to control whether users can start workflows directly from the Temporal Web UI.

  • Temporal Worker 2.0: An updated Worker charm with improvements to security, observability, and operational reliability.

  • Documented upgrade path: Guidance for upgrading existing Charmed Temporal 1.23 deployments to 1.31, including database schema migrations and worker migration.

Upgrades

Temporal Server and Admin 1.31

Ubuntu 26.04 LTS

The following charms support Ubuntu 26.04:

Temporal Worker 2.0

Temporal Worker is available on its separate 2.0/stable track, using Ubuntu 24.04 LTS. Worker 2.0 introduces improvements to worker configuration, reliability, and monitoring.

Features

Enhanced TLS support

Charmed Temporal improves secure communication between components. #61

  • Temporal UI can detect when the Temporal frontend uses TLS and adjust its connection accordingly.

  • Temporal Worker validates TLS requirements when connecting to a TLS-enabled Temporal frontend, helping prevent insecure or incorrectly configured connections.

Improved workflow management in Temporal UI

Temporal UI introduces a configuration option to enable or disable the Start Workflow functionality. #57

This provides administrators with additional control over workflow execution directly from the Web UI, allowing the interface to be tailored to their operational requirements.

Improved Worker observability and reliability

Temporal Worker 2.0 includes:

  • Updated Grafana dashboards and Prometheus alerting capabilities for monitoring worker health. #124

  • Improved handling of database credentials across multiple worker units. #129

  • Improved detection and reporting of worker failures and unhealthy states.#105

These enhancements help users monitor worker applications and troubleshoot operational issues more effectively.

Upgrade support from Temporal 1.23 to 1.31

A new upgrade guide describes how to transition existing Charmed Temporal deployments from 1.23/stable to 1.31/stable.

Upgrading from Temporal Worker 1.0 to 2.0 requires deploying a new Worker 2.0 application alongside the existing deployment, migrating its configurations and integrations, validating workflow execution, and retiring Worker 1.0 once the transition is complete.

Resources

We welcome feedback from users deploying or upgrading Charmed Temporal and look forward to hearing about your experience with the 1.31 release.

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