magnum/releasenotes/notes/fix-global-stack-list-7a3a6...

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---
security:
- Fix global stack list in periodic task. In before, magnum's periodic task
performs a `stack-list` operation across all tenants. This is disabled
by Heat by default since it causes a security issue. At this release,
magnum performs a `stack-get` operation on each Heat stack by default.
This might not be scalable and operators have an option to fall back to
`stack-list` by setting the config `periodic_global_stack_list` to
`True` (`False` by default) and updating the heat policy file (usually
/etc/heat/policy.json) to allow magnum list stacks.