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feat(mpg): add fly mpg fork - #5305
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- Fork a v2 Managed Postgres cluster into a new cluster through the
Machines API (POST /v1/postgres/{id}/fork)
- --name defaults to <source-name>-fork; --plan is optional and, when
left out, the fork keeps the source cluster's plan
- Add ForkManagedPostgresCluster and ListManagedPostgresPlans to the
FlapsClient interface and its mocks
Needs a fly-go release with superfly/fly-go#322.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
miguel-fly
approved these changes
Oct 15, 2026
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Change Summary
What and Why:
Adds
fly mpg fork [CLUSTER_ID]. It forks a Managed Postgres cluster into a new cluster from the source's current data. The source cluster isn't changed.--name/-ndefaults to<source-name>-fork.--planis optional. Without it, the fork keeps the source cluster's plan. The API is the source of truth for plans, so the value is passed through as is.How:
POST /v1/postgres/{id}/fork) through the fly-go flaps client, the same way the other v2mpgcommands do.ForkManagedPostgresClusterandListManagedPostgresPlans. Both are added to theFlapsClientinterface and its mocks/inmem implementations.internal/command/mpg/fork_test.goandinternal/command/mpg/v2/run_fork_test.go.Related to:
GET /v1/postgres/plans)Documentation
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