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Sentinel: clarify arguments of SENTINEL IS-MASTER-DOWN-BY-ADDR

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antirez 2015-05-08 17:04:01 +02:00
parent a0cd75cd1b
commit b849886a0d
1 changed files with 17 additions and 1 deletions
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18
src/sentinel.c
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@ -2665,7 +2665,23 @@ void sentinelCommand(redisClient *c) {
return;
addReplyDictOfRedisInstances(c,ri->sentinels);
} else if (!strcasecmp(c->argv[1]->ptr,"is-master-down-by-addr")) {
/* SENTINEL IS-MASTER-DOWN-BY-ADDR <ip> <port> <current-epoch> <runid>*/
/* SENTINEL IS-MASTER-DOWN-BY-ADDR <ip> <port> <current-epoch> <runid>
*
* Arguments:
*
* ip and port are the ip and port of the master we want to be
* checked by Sentinel. Note that the command will not check by
* name but just by master, in theory different Sentinels may monitor
* differnet masters with the same name.
*
* current-epoch is needed in order to understand if we are allowed
* to vote for a failover leader or not. Each Senitnel can vote just
* one time per epoch.
*
* runid is "*" if we are not seeking for a vote from the Sentinel
* in order to elect the failover leader. Otherwise it is set to the
* runid we want the Sentinel to vote if it did not already voted.
*/
sentinelRedisInstance *ri;
long long req_epoch;
uint64_t leader_epoch = 0;