Pavel Solodovnikov 4c351ff260 raft: switch group_id type from uint64_t to utils::UUID ...

Introduce a tagged id struct for `group_id`.

Raft code would want to generate quite a lot of unique
raft groups in the future (e.g. tablets). UUID is designed
exactly for that (e.g. larger capacity than `uint64_t`, obviously,
and also has built-in procedures to generate random ids).

Also, this is a preparation to make "raft group 0" use a random
ID instead of a literal fixed `0` as a group id.

The purpose is that every scylla cluster must have a unique ID
for "raft group 0" since we don't want the nodes from some other
cluster to disrupt the current cluster. This can happen if,
for some reason, a foreign node happens to contact a node in
our cluster.

Tests: unit(dev)

Signed-off-by: Pavel Solodovnikov <pa.solodovnikov@scylladb.com>
Message-Id: <20210429170630.533596-3-pa.solodovnikov@scylladb.com>

2021-05-02 16:39:54 +03:00

..

messaging_service_fwd.hh

messaging_service: Unglobal messaging service instance

2020-08-19 20:50:53 +03:00

messaging_service.cc

raft: switch group_id type from uint64_t to utils::UUID

2021-05-02 16:39:54 +03:00

messaging_service.hh

raft: switch group_id type from uint64_t to utils::UUID

2021-05-02 16:39:54 +03:00

msg_addr.hh

messaging: msg_addr: mark methods noexcept

2020-11-01 16:46:18 +02:00