Update the handshake to use an arbitrary JSON payload to transfer metadata.
Handshake sends the metadata length first as an uint64 and then the metadata itself.
Signed-off-by: Zakhar Bessarab <z.bessarab@victoriametrics.com>
Send a node ID of vmstorage as a part of vmselect and vminsert handshakes.
Use vmstorage node ID as an identifier for consistent hashing at vminsert.
Cluster native endpoints calculate vminsert and vmselect node IDs as a hash of all underlying storage node IDs, so that it will also remain consistent in case of address changes.
Signed-off-by: Zakhar Bessarab <z.bessarab@victoriametrics.com>
This should protect from possible data loss when `vmstorage` is stopped while the packet is sent from `vminsert`.
This commit switches to new protocol between vminsert and vmstorage, which is incompatible
with the previous protocol. So it is required that both vminsert and vmstorage nodes are updated.
