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Add source-watcher to multi-tenancy docs - #2666
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Document that source-watcher accepts the --no-cross-namespace-refs flag and, starting with Flux v2.10.0, the --default-service-account flag for reconciling ExternalArtifacts in namespaces other than the ArtifactGenerator namespace. Signed-off-by: Matheus Pimenta <matheuscscp@gmail.com>
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Documents the
source-watcherflags relevant to multi-tenancy lockdown:--no-cross-namespace-refsadded to the multi-tenancy lockdown best practices and to the bootstrap patch targets.--default-service-accountadded to the Kubernetes RBAC impersonation best practices, supported starting with Flux v2.10.0. Forsource-watcher, it only applies toExternalArtifactresources that target a namespace other than the ArtifactGenerator namespace; artifacts in the ArtifactGenerator namespace continue to be reconciled with the controller's service account.The multi-tenancy bootstrap patch includes a note about the Flux v2.10.0 minimum version for the
source-watcher--default-service-accountflag, since earlier controller versions fail to start with an unknown flag.The workload identity section now clarifies that
source-watcher's--default-service-accountis used for Kubernetes RBAC impersonation, not for workload identity authentication.xref: fluxcd/source-watcher#354 fluxcd/source-watcher#387