Streamed a clone of a production store into the smoke VM - 3.6 GB, 12,361
settings, 6 accounts across 9 domains - and migrated it 0.15.5 -> 0.16.14
with the tool's own phases. The migration succeeded. Two defects surfaced
that no smaller instance could have shown, plus one finding worth recording.
1. Account roles broke on production-shaped names. v0.16 stores an account
as a local part plus a domain reference: a v0.15 account named
"[email protected]" becomes name "john" with a domainId. The generator
passed the full address and the server rejected it outright ("Invalid
email local part"), failing the apply. The smoke instance used bare
usernames - alice, bob - and never exercised this.
Fixed to use the local part. And because local parts are unique only
within a domain - [email protected] and [email protected] both become
"postmaster" - an ambiguous one is now refused with a warning rather
than risking an upsert that grants Admin to the wrong account. Verified
on the clone: the one admin came out with roles {"@type": "Admin"} and
the other five accounts untouched.
2. Cutover's health check conflated liveness with credentials. A config
fallback-admin does not survive the migration - v0.16's config is a
store pointer, so the old [authentication.fallback-admin] block simply
ceases to exist - so the credentials supplied for the pre-migration
instance came back 401 on the migrated one, and the check reported the
service as never having answered. It had answered; it was up and serving
on all ten ports. Liveness and credentials are now separate: any
response proves the service is up, and credentials that stopped working
are a warning that names this cause.
Also recorded: a failed apply leaves the store in bootstrap mode, where
only Bootstrap objects are accessible. A half-applied plan is not a
partially configured server but an unusable one.
Timing, which is the other reason to rehearse: the recovery-mode conversion
of that 3.6 GB store took 2 seconds. A migration window is dominated by
waiting and verification, not data volume.
No production data in this commit; fixtures use example.net and the shapes
involved.
jcoffey-dev
2ca9522f9a