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redis-cluster

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В readme всё корректно?

Добрый вечер!

~/redis-cluster-master$ docker-compose -v
docker-compose version 1.26.2, build eefe0d31
~/redis-cluster-master$ docker -v
Docker version 19.03.13, build 4484c46d9d
~/redis-cluster-master$ make -v
GNU Make 4.2.1

~/redis-cluster-master$ make init
docker-compose -f docker-compose.yml up -d
WARNING: Some services (sentinel) use the 'deploy' key, which will be ignored. Compose does not support 'deploy' configuration - use `docker stack deploy` to deploy to a swarm.
Creating network "redis-cluster-master_default" with the default driver
Pulling redis1 (bitnami/redis:latest)...
latest: Pulling from bitnami/redis
522a7372a4ae: Pull complete
faccd8da6b35: Pull complete
c8ecd05c1389: Pull complete
5454355e9e99: Pull complete
7feafbc76371: Pull complete
1882d0155fb8: Pull complete
42d3808979fb: Pull complete
22ff6ee558a9: Pull complete
c5c2e6a8c286: Pull complete
336f54118055: Pull complete
6c1a8ee75e27: Pull complete
15fc6d39160c: Pull complete
Digest: sha256:7f315785695d5e808c44db242dd258d3539c0fa3c185e9671414b2c0d0b391a2
Status: Downloaded newer image for bitnami/redis:latest
Pulling sentinel (bitnami/redis-sentinel:latest)...
latest: Pulling from bitnami/redis-sentinel
522a7372a4ae: Already exists
d0e4cf0295ab: Pull complete
45e0fcee51d5: Pull complete
3ea4dfc96b2e: Pull complete
7b0d419c75f2: Pull complete
28a4d4deb457: Pull complete
d001f4eafb5c: Pull complete
d07a1f980cd2: Pull complete
25b56848f24f: Pull complete
Digest: sha256:f2acdea7d18d57e05ca543a58bea292952b3158aa90e08c858f86d4fac8472ec
Status: Downloaded newer image for bitnami/redis-sentinel:latest
Pulling lb (haproxy:2.2-alpine)...
2.2-alpine: Pulling from library/haproxy
df20fa9351a1: Pull complete
569c8f92348a: Pull complete
e11e66ab2897: Pull complete
Digest: sha256:f6715e4b146145cf67b89ee8ba9a4fc19547bc12453b9ef1ee4e60518728c95c
Status: Downloaded newer image for haproxy:2.2-alpine
Pulling benchmark (redis:4-alpine)...
4-alpine: Pulling from library/redis
cbdbe7a5bc2a: Pull complete
dc0373118a0d: Pull complete
cfd369fe6256: Pull complete
152ffd6a3b24: Pull complete
7c01860f13a3: Pull complete
aa6ecacd3bee: Pull complete
Digest: sha256:aaf7c123077a5e45ab2328b5ef7e201b5720616efac498d55e65a7afbb96ae20
Status: Downloaded newer image for redis:4-alpine
Creating redis-cluster-master_redis1_1 ... done
Creating redis-cluster-master_redis2_1 ... done
Creating redis-cluster-master_redis3_1 ... done
Creating redis-cluster-master_sentinel_1 ... done
Creating redis-cluster-master_lb_1       ... done
Creating redis-cluster-master_benchmark_1 ... done

~/redis-cluster-master$ curl -v localhost:9000
*   Trying 127.0.0.1:9000...
* TCP_NODELAY set
* Connected to localhost (127.0.0.1) port 9000 (#0)
> GET / HTTP/1.1
> Host: localhost:9000
> User-Agent: curl/7.68.0
> Accept: */*
> 
* Mark bundle as not supporting multiuse
< HTTP/1.1 503 Service Unavailable
< content-length: 107
< cache-control: no-cache
< content-type: text/html
< 
<html><body><h1>503 Service Unavailable</h1>
No server is available to handle this request.
</body></html>
* Connection #0 to host localhost left intact

В тексте readme всё корректно?

Ноды сохраняют свое состояние в статусе мастер в момент падения и после этого поднимаются

Ноды сохраняют свое состояние в статусе мастер в момент падения и после этого поднимаются в этом состоянии:

Шаги по воспроизведению:

Выключаем redis1 (master)
Дожидаемся переключения мастер статуса на другую ноду
Выключаем redis2/redis3 в зависимости от того кто стал мастером
Дожидаемся переключения мастер статуса на последнюю ноду
Стартуем все контейнеры

Наблюдаем ситуацию:

После очередного дискавери со стороны Sentinel кластера, статус выправляется, но в этот момент пока ситуация существует (~20сек) происходит рассинхронизация Redis кластера, так как все 3 ноды считают себя мастером.
Как в таких случаях будет осуществляться отказоустойчивость?

Не работает автоматическое переключение статуса master

git clone XXX
make init

Дожидаемся старта, проверяем в http://localhost:9000/haproxy_stats появление master.

Останавливаем master

docker stop redis-cluster_redis1_1

Ожидаемое поведение - срабатывает failover, статус master переходит на живую ноду кластера.

Фактическое поведение

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