Function clusterUpdateMyselfFlags

app/redis-6.2.6/src/cluster.c:467–477

Some flags (currently just the NOFAILOVER flag) may need to be updated * in the "myself" node based on the current configuration of the node, * that may change at runtime via CONFIG SET. This function changes the * set of flags in myself->flags accordingly. */

 * that may change at runtime via CONFIG SET. This function changes the
 * set of flags in myself->flags accordingly. */
void clusterUpdateMyselfFlags(void) {
    int oldflags = myself->flags;
    int nofailover = server.cluster_slave_no_failover ?
                     CLUSTER_NODE_NOFAILOVER : 0;
    myself->flags &= ~CLUSTER_NODE_NOFAILOVER;
    myself->flags |= nofailover;
    if (myself->flags != oldflags) {
        clusterDoBeforeSleep(CLUSTER_TODO_SAVE_CONFIG|
                             CLUSTER_TODO_UPDATE_STATE);
    }
}

void clusterInit(void) {
    int saveconf = 0;