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Cluster: when failing over claim master slots.

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antirez 2013-03-15 16:53:41 +01:00
parent b8127e337a
commit e28e61e839
1 changed files with 16 additions and 1 deletions
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17
src/cluster.c
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@ -1389,6 +1389,7 @@ void clusterHandleSlaveFailover(void) {
time_t data_age = server.unixtime - server.repl_down_since; time_t data_age = server.unixtime - server.repl_down_since;
time_t auth_age = server.unixtime - server.cluster->failover_auth_time; time_t auth_age = server.unixtime - server.cluster->failover_auth_time;
int needed_quorum = (server.cluster->size / 2) + 1; int needed_quorum = (server.cluster->size / 2) + 1;
int j;
/* Check if our data is recent enough. For now we just use a fixed /* Check if our data is recent enough. For now we just use a fixed
* constant of ten times the node timeout since the cluster should * constant of ten times the node timeout since the cluster should
@ -1411,6 +1412,8 @@ void clusterHandleSlaveFailover(void) {
/* Check if we reached the quorum. */ /* Check if we reached the quorum. */
if (server.cluster->failover_auth_count >= needed_quorum) { if (server.cluster->failover_auth_count >= needed_quorum) {
clusterNode *oldmaster = server.cluster->myself->slaveof;
redisLog(REDIS_WARNING, redisLog(REDIS_WARNING,
"Masters quorum reached: failing over my (failing) master."); "Masters quorum reached: failing over my (failing) master.");
/* We have the quorum, perform all the steps to correctly promote /* We have the quorum, perform all the steps to correctly promote
@ -1424,9 +1427,21 @@ void clusterHandleSlaveFailover(void) {
server.cluster->myself->slaveof = NULL; server.cluster->myself->slaveof = NULL;
replicationUnsetMaster(); replicationUnsetMaster();
/* 2) Ping all the other nodes so that they can update the state /* 2) Claim all the slots assigned to our master. */
for (j = 0; j < REDIS_CLUSTER_SLOTS; j++) {
if (clusterNodeGetSlotBit(oldmaster,j)) {
clusterDelSlot(j);
clusterAddSlot(server.cluster->myself,j);
}
}
/* 3) Ping all the other nodes so that they can update the state
* accordingly and detect that we switched to master role. */ * accordingly and detect that we switched to master role. */
clusterBroadcastPing(); clusterBroadcastPing();
/* 4) Update state and save config. */
clusterUpdateState();
clusterSaveConfigOrDie();
} }
} }