This PR implements the synchronization mechanics for TKA: generating a SyncOffer, processing a SyncOffer to find an intersection,
and computing the set of AUMs that should be transmitted to effect convergence.
This is the final PR implementing core mechanics for TKA.
Signed-off-by: Tom DNetto <tom@tailscale.com>
FS implements Chonk, and given the expected load characteristics (frequent use
of AUM() + ChildAUMs(), and infrequent use of Heads() + CommitVerifiedAUMs()), the
implementation avoids scanning the filesystem to service AUM() and ChildAUMs().
Signed-off-by: Tom DNetto <tom@tailscale.com>
Chonks are responsible for efficient storage of AUMs and other TKA state.
For testing/prototyping I've implemented an in-memory version, but once we
start to use this from tailscaled we'll need a file-based version.
Signed-off-by: Tom DNetto <tom@tailscale.com>
This is the first in a series of PRs implementing the internals for the
Tailnet Key Authority. This PR implements the AUM and Key types, which
are used by pretty much everything else. Future PRs:
- The State type & related machinery
- The Tailchonk (storage) type & implementation
- The Authority type and sync implementation
Signed-off-by: Tom DNetto <tom@tailscale.com>
