A exception of relationship between master and slave in Redis

[xu ran]

Pattern of Redis cluster:

1. one master
2. one slave
3. three sentinels

I deployed a Redis cluster in kubernetes with a workload called statefulsets. Every instance was deployed in a single pod.

When i stopped the process of redis-server or delete the pod which master or slave was in here, the mechanism of Redis failover started to process. After the failover processed successfully, i check the info of replication between master and slave.I found that correct information appeared in slave, because i saw that the relationship between master and slave. But, i noticed that there weren't any information of relationship in master instance when i executed the command "redis-cli info replication". I known that creating the relationship of replication between master and slave needs to execute command "slaveof" in slave. And i executed this command in slave. However,  there weren't any information of relationship in master instance.

So, my question are below:

1. What's rely on the relationship of replication in master created?
2. How to fix this problem? (Now, my approach is restarting master instance)

[xu ran]

Master conf:

daemonize no

pidfile /var/run/redis.pid

port 6379

tcp-backlog 511

bind 0.0.0.0

timeout 30

maxclients 10000

tcp-keepalive 60

loglevel debug

logfile ""

syslog-enabled yes

syslog-ident native-redis

databases 16

save 900 1

save 300 10

save 60 10000

stop-writes-on-bgsave-error yes

rdbcompression yes

rdbchecksum yes

dbfilename dump.rdb

dir "/redis-data"

slave-serve-stale-data yes

rename-command FLUSHALL ""

rename-command FLUSHDB ""

slave-read-only yes

repl-diskless-sync no

repl-diskless-sync-delay 5

repl-disable-tcp-nodelay no

repl-timeout 600

repl-ping-slave-period 10

repl-backlog-size 16mb

repl-backlog-ttl 3600

slave-priority 100

requirepass %redis-pass%

appendonly yes

appendfilename "appendonly.aof"

appendfsync everysec

no-appendfsync-on-rewrite yes

auto-aof-rewrite-percentage 100

auto-aof-rewrite-min-size 64mb

aof-load-truncated yes

lua-time-limit 5000

slowlog-log-slower-than 10000

slowlog-max-len 1024

latency-monitor-threshold 0

notify-keyspace-events ""

hash-max-ziplist-entries 512

hash-max-ziplist-value 64

list-max-ziplist-entries 512

list-max-ziplist-value 64

set-max-intset-entries 512

zset-max-ziplist-entries 128

zset-max-ziplist-value 64

hll-sparse-max-bytes 3000

activerehashing yes

client-output-buffer-limit normal 0 0 0

client-output-buffer-limit slave 256mb 64mb 60

client-output-buffer-limit pubsub 32mb 8mb 60

hz 10

aof-rewrite-incremental-fsync yes

[xu ran]

slave conf:

daemonize no

pidfile /var/run/redis.pid

port 6379

tcp-backlog 511

bind 0.0.0.0

timeout 30

maxclients 10000

tcp-keepalive 60

loglevel debug

logfile ""

syslog-enabled yes

syslog-ident native-redis

databases 16

save 900 1

save 300 10

save 60 10000

stop-writes-on-bgsave-error yes

rdbcompression yes

rdbchecksum yes

dbfilename dump.rdb

dir "/redis-data"

slaveof %master-ip% 6379

masterauth %redis-pass%

slave-announce-ip %slave_ip%

slave-announce-port 6379

[xu ran]

sentinel conf:

sentinel monitor mymaster %master% 6379 2

sentinel auth-pass mymaster %password%

sentinel down-after-milliseconds mymaster %down-failover-time%

sentinel failover-timeout mymaster 180000

sentinel parallel-syncs mymaster 1

bind 0.0.0.0