Earlier changes regarding the deprecation of datetime.utcnow() had the consequence, that persisted isoformat timestamps now contained a timezone. Parsing these stamps again and comparing them with a naive time resulted in an error.
From now on, always compare timezoned datetime objects. Includes a migration path for naive isoformat timestamps created in earlier releases.

PL-133467

@flyingcircusio/release-managers

Release process

• Created changelog entry using ./changelog.sh

PR release workflow (internal)

• PR has internal ticket
• internal issue ID (PL-…) part of branch name
• internal issue ID mentioned in PR description text
• ticket is on Platform agile board
• ticket state set to Pull request ready
• if ticket is more urgent than within the next few days, directly contact a member of the Platform team

Design notes

• Provide a feature toggle if the change might need to be adjusted/reverted quickly depending on context. Consider whether the default should be on or off. Example: rate limiting.
• All customer-facing features and (NixOS) options need to be discoverable from documentation. Add or update relevant documentation such that hosted and guided customers can understand it as well.

Security implications

• Security requirements defined? (WHERE)
  • must not introduce known regressions
  • fix regression in fc-devhost
  • deployment and vm cleanup needs to work
  • consider migrations from older state of earlier releases
• Security requirements tested? (EVIDENCE)
  • automated tests still pass
  • test-deployment of directory works
  • old vms are successfully cleaned up
  • investigated persisted VM state on platform 21.05