Redis does not replicate configuration changes made via the CONFIG SET
command. Nor does Sentinel. This is a small tool which is meant to
reside on a sentinel to read it's config and synchronize all monitored
slaves with their master's for a list of configuration directives.
The configuration options currently available are telling configsync
where to find the Sentinel config file and what directives to
synchronize. By default it will look to /etc/redis/sentinel.conf, but
this can be changed via the environment variable
CONFIGSYNC_SENTINELCONFIGFILE.
Likewise CONFIGSYNC_SYNCABLEDIRECTIVELIST can be a single directive or
a comma separated list of directives to synchronize to the slave(s).
If you want to run it in "pretend" mode: CONFIGSYNC_PRETENDONLY=true
Generally this is expected to be put into a cron table to run perodically. It has been tested running against a sentinel with 100 monitored pods and runs in under half a second, so should be safe to run every minute if desired.