50:50 split algorithm now works in following way:
- On client configuration change, membership change or disconnect wait
till membership is stable (= all client configuration node list are
equal, and all partitions has equal information).
- Choose best partition >= 50%
- If no such partition exists, send NACK to all clients
- Send NACK to all clients who should receive NACK
- After all clients who should receive NACK confirm vote reception, send
ACK to all clients who should get ACK
This ensures that there are never two partitions with ACK and it has
much better behavior than previous version, because if tie-breaker
partition is not connected, other partition gets ACK.
Signed-off-by: Jan Friesse <jfriesse@redhat.com>
To prevent receiving vote from old membership ring id is sent to server
during init and replied back to client in every node list,
ask for vote reply and vote info messages.
Signed-off-by: Jan Friesse <jfriesse@redhat.com>
- corosync-device-net as binary is gone. Replacement is
corosync-qdevice
- corosync-qdevice has support for multiple models (only net is
currently implemented)
- Completelly redesign qdevice-net main loop.
- Connect is non blocking
- Cmap and Votequorum events are handled even before connect to
qnetd. Algorithm gets send_node_list and vote set so it's not needed
to check connection status and also vote_timer is running and voting
until something changes (configuration or votequorum node list)
- If connect fails, algorithm_disconnected with new reason
CANT_CONNECT_TO_THE_SERVER is called
- Logging for qdevice is based on libqb logging functions. Also
logging configuration from corosync.conf is now used and dynamic
changes of configuration are handled.
- Added qdevice_net_algorithm_config_node_list_changed
- Changed qdevice_net_algorithm_votequorum_node_list_notify in respect
of adding send_node_list so it's similar to other functions.
Signed-off-by: Jan Friesse <jfriesse@redhat.com>
- Add support for cmap node list configuration change
- Add client side algorithms
- Check if currently received ring id in membership message
equals to last sent ring id
- Send config node list only if config node list really changes and not
after every reload
- Add tlv_ring_id_eq (replacing qnetd_algo_rings_eq) so it's usable in
client
- Move debug logs from algo-test into qnetd-log-debug.c and call them in
proper places (= logs are now algorithm independent)
- Fix memory leak in msg
Signed-off-by: Jan Friesse <jfriesse@redhat.com>
