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DNS Sync

Forked from external-dns - and using the same codebase, but with a different UX.

Current interface is extended but compatible with external-dns HTTP protocol - but it is using URL path to provide multiple webhooks in the same service, and to allow domain/zone to be reflected in the path for L7 Authz.

What It Does

Like external-dns, will synchronize DNS with K8S resources.

Changes

• Instead of CLI flags, all the config is based on structs - can be loaded from a file, and eventually will be used as CRDs in the cluster. Anything configurable should be defined as part of the CRDs
• Removed all providers except 'webhok' and inmemory. You can use external-dns to expose any of the other provider as a webhook or an out of tree provider.
• Removed most sources - in future we may add the external-dns sources as a webhook or linked in.
• Removed regex and other options that are tricky to use and not common - use external-dns for that.
• The server can run multiple sync loops for different providers/zones. Each zone can get different sources and domains. The informers are shared.
• removed 'legacy' as much as possible