Function clusterRenameNode

app/redis-6.2.6/src/cluster.c:1039–1050

This is only used after the handshake. When we connect a given IP/PORT * as a result of CLUSTER MEET we don't have the node name yet, so we * pick a random one, and will fix it when we receive the PONG request using * this function. */

 * pick a random one, and will fix it when we receive the PONG request using
 * this function. */
void clusterRenameNode(clusterNode *node, char *newname) {
    int retval;
    sds s = sdsnewlen(node->name, CLUSTER_NAMELEN);

    serverLog(LL_DEBUG,"Renaming node %.40s into %.40s",
        node->name, newname);
    retval = dictDelete(server.cluster->nodes, s);
    sdsfree(s);
    serverAssert(retval == DICT_OK);
    memcpy(node->name, newname, CLUSTER_NAMELEN);
    clusterAddNode(node);
}

/* -----------------------------------------------------------------------------
 * CLUSTER config epoch handling