Konstantin Osipov 7c1c83320c test.py: (pylib) add Scylla Server and Artifact Registry ...

Allow starting clusters of Scylla servers. Chain up the next
server start to the end of the previous one, and set the next
server's seed to the previous server.

As a workaround for a race between token dissemination through
gossip and streaming, change schema version to force a gossip
round and make sure all tokens end up at the joining node in time.

Make sure scylla start is not race prone.

auth::standard_role_manager creates "cassandra" role in an async loop
auth::do_after_system_ready(), which retries role creation with an
exponential back-off. In other words, even after CQL port is up, Scylla
may still be initializing.

This race condition could lead to spurious errors during cluster
bootstrap or during a test under CI.

When the role is ready, queries begin to work, so rely on this "side
effect".

To start or stop servers, use a new class, ScyllaCluster,
which encapsulates multiple servers united into a cluster.
In it, validate that a test case cleans up after itself.
Additionally, swallow startup errors and throw them when
the test is actually used.

2022-05-25 20:26:37 +03:00

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