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Andrey Kolkov
a410a3f48b
Add a strategy.backups.cozystack.io/Kafka driver that backs up the topic metadata of a Cozystack-managed Kafka application — partition counts, replication factors and non-default topic configs — through the Kafka Admin API, and restores it with kafka-topics --create + kafka-configs --alter. Modelled on the Job/Rabbitmq strategies: the driver renders a one-shot batch Job, gates on the Strimzi Kafka cluster reporting Ready, and keys each backup by .BackupName so runs do not overwrite each other. Scope is deliberately narrow: message payloads, consumer-group offsets, ACLs, quotas and KafkaUsers are out of scope, and there is no PITR. Restored topics are created directly (unmanaged on the target) — the accepted tradeoff of an Admin-API-only driver. Both restore flows are implemented: in-place recreates dropped topics into the source, to-copy applies the source's topics onto a freshly-bootstrapped empty cluster. Wire it into cozy-default (strategy-kafka-default.yaml gated on the bucket name, a BackupClass binding, read RBAC on kafka.strimzi.io/kafkas for the readiness gate, and the Strimzi Kafka client image), document it in backup-classes.md, and add an honest round-trip example plus Chainsaw e2e (examples/backups/kafka-metadata, kafka-3-metadata-roundtrip) that proves a per-run retention.ms sentinel survives both restores. Unit tests cover the driver's pure helpers (application-ref validation, readiness verdict, parameter round-trip, per-run artifact-URI keying). Not yet verified on a live cluster. Signed-off-by: Andrey Kolkov <androndo@gmail.com> Assisted-by: LLM