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Cluster: error out quicker if port is unusable

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The default cluster control port is 10,000 ports higher than
the base Redis port.  If Redis is started on a too-high port,
Cluster can't start and everything will exit later anyway.
This commit is contained in:
Matt Stancliff 2014-02-19 17:30:07 -05:00
parent b20ae393f1
commit ce68caea37
1 changed files with 13 additions and 0 deletions
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13
src/cluster.c
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@ -329,6 +329,19 @@ void clusterInit(void) {
/* We need a listening TCP port for our cluster messaging needs. */
server.cfd_count = 0;
/* Port sanity check II
The other handshake port check is triggered too late to stop
us from trying to use a too-high cluster port number.
*/
if (server.port > (65535-REDIS_CLUSTER_PORT_INCR)) {
redisLog(REDIS_WARNING, "Redis port number too high. "
"Cluster communication port is 10,000 port "
"numbers higher than your Redis port. "
"Your Redis port number must be "
"lower than 55535.");
}
if (listenToPort(server.port+REDIS_CLUSTER_PORT_INCR,
server.cfd,&server.cfd_count) == REDIS_ERR)
{