Commit 3ebace93 authored by Moti Cohen's avatar Moti Cohen Committed by Oran Agra
Browse files

Fix sentinel issue if replica changes IP (#11590)



As Sentinel supports dynamic IP only when using hostnames, there
are few leftover addess comparison logic that doesn't take into
account that the IP might get change.
Co-authored-by: default avatarmoticless <moticless@github.com>
(cherry picked from commit 4a27aa48)
parent 423c78f4
......@@ -640,11 +640,6 @@ void releaseSentinelAddr(sentinelAddr *sa) {
zfree(sa);
}
/* Return non-zero if two addresses are equal. */
int sentinelAddrIsEqual(sentinelAddr *a, sentinelAddr *b) {
return a->port == b->port && !strcasecmp(a->ip,b->ip);
}
/* Return non-zero if the two addresses are equal, either by address
* or by hostname if they could not have been resolved.
*/
......@@ -1664,7 +1659,7 @@ int sentinelResetMasterAndChangeAddress(sentinelRedisInstance *master, char *hos
while((de = dictNext(di)) != NULL) {
sentinelRedisInstance *slave = dictGetVal(de);
if (sentinelAddrIsEqual(slave->addr,newaddr)) continue;
if (sentinelAddrOrHostnameEqual(slave->addr,newaddr)) continue;
slaves[numslaves++] = dupSentinelAddr(slave->addr);
}
dictReleaseIterator(di);
......@@ -1672,7 +1667,7 @@ int sentinelResetMasterAndChangeAddress(sentinelRedisInstance *master, char *hos
/* If we are switching to a different address, include the old address
* as a slave as well, so that we'll be able to sense / reconfigure
* the old master. */
if (!sentinelAddrIsEqual(newaddr,master->addr)) {
if (!sentinelAddrOrHostnameEqual(newaddr,master->addr)) {
slaves[numslaves++] = dupSentinelAddr(master->addr);
}
......@@ -2221,7 +2216,7 @@ void rewriteConfigSentinelOption(struct rewriteConfigState *state) {
* slave's address, a failover is in progress and the slave was
* already successfully promoted. So as the address of this slave
* we use the old master address instead. */
if (sentinelAddrIsEqual(slave_addr,master_addr))
if (sentinelAddrOrHostnameEqual(slave_addr,master_addr))
slave_addr = master->addr;
line = sdscatprintf(sdsempty(),
"sentinel known-replica %s %s %d",
......
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