Function removeMatchingSentinelFromMaster

app/redis-6.2.6/src/sentinel.c:1456–1474

This function remove the Sentinel with the specified ID from the * specified master. * * If "runid" is NULL the function returns ASAP. * * This function is useful because on Sentinels address switch, we want to * remove our old entry and add a new one for the same ID but with the new * address. * * The function returns 1 if the matching Sentinel was removed, otherwise * 0 if there was no

 * The function returns 1 if the matching Sentinel was removed, otherwise
 * 0 if there was no Sentinel with this ID. */
int removeMatchingSentinelFromMaster(sentinelRedisInstance *master, char *runid) {
    dictIterator *di;
    dictEntry *de;
    int removed = 0;

    if (runid == NULL) return 0;

    di = dictGetSafeIterator(master->sentinels);
    while((de = dictNext(di)) != NULL) {
        sentinelRedisInstance *ri = dictGetVal(de);

        if (ri->runid && strcmp(ri->runid,runid) == 0) {
            dictDelete(master->sentinels,ri->name);
            removed++;
        }
    }
    dictReleaseIterator(di);
    return removed;
}

/* Search an instance with the same runid, ip and port into a dictionary
 * of instances. Return NULL if not found, otherwise return the instance