Zero-Downtime Atlassian Server to Cloud Migration

The challenge

The client was running a mature Atlassian Data Center installation with 500+ active users across Jira Software, Jira Service Management, Confluence, and Bitbucket. Their Server licenses were approaching end-of-life, their infrastructure team was spending significant time on maintenance, and performance was degrading under load. The migration to Cloud needed to preserve years of custom workflows, automation rules, ScriptRunner scripts, and integrations — none of which could be lost or broken.

The approach

Migrating an enterprise Atlassian environment is not a lift-and-shift. I started with a detailed configuration audit across every product: workflows, permission schemes, notification schemes, custom fields, ScriptRunner listeners, automation rules, and third-party app dependencies. Each item was assessed for Cloud compatibility and a migration path was defined before any work began.

• Full configuration audit — workflows, schemes, scripts, apps, integrations, and user data
• App compatibility assessment — identified Cloud alternatives or migration paths for every app
• Custom workflow recreation — rebuilt complex approval workflows natively in Jira Cloud Automation
• ScriptRunner migration — converted critical Groovy scripts to Cloud-compatible equivalents
• Parallel environment testing — Cloud environment ran in parallel for 4 weeks before cutover
• User communication and training materials — phased rollout across teams with dedicated support window
• Single-window cutover — complete migration executed in one maintenance window, zero data loss

Results