/*================================= Globals ================================= */
-/* Alternate stack for SIGSEGV/etc handlers */
-char altstack[SIGSTKSZ];
-
/* Global vars */
struct redisServer server; /* server global state */
struct redisCommand *commandTable;
* results. For instance SPOP and RANDOMKEY are two random commands.
* S: Sort command output array if called from script, so that the output
* is deterministic.
+ * l: Allow command while loading the database.
+ * t: Allow command while a slave has stale data but is not allowed to
+ * server this data. Normally no command is accepted in this condition
+ * but just a few.
*/
struct redisCommand redisCommandTable[] = {
{"get",getCommand,2,"r",0,NULL,1,1,1,0,0},
{"sismember",sismemberCommand,3,"r",0,NULL,1,1,1,0,0},
{"scard",scardCommand,2,"r",0,NULL,1,1,1,0,0},
{"spop",spopCommand,2,"wRs",0,NULL,1,1,1,0,0},
- {"srandmember",srandmemberCommand,2,"rR",0,NULL,1,1,1,0,0},
+ {"srandmember",srandmemberCommand,-2,"rR",0,NULL,1,1,1,0,0},
{"sinter",sinterCommand,-2,"rS",0,NULL,1,-1,1,0,0},
{"sinterstore",sinterstoreCommand,-3,"wm",0,NULL,1,-1,1,0,0},
{"sunion",sunionCommand,-2,"rS",0,NULL,1,-1,1,0,0},
{"exec",execCommand,1,"s",0,NULL,0,0,0,0,0},
{"discard",discardCommand,1,"rs",0,NULL,0,0,0,0,0},
{"sync",syncCommand,1,"ars",0,NULL,0,0,0,0,0},
+ {"replconf",replconfCommand,-1,"ars",0,NULL,0,0,0,0,0},
{"flushdb",flushdbCommand,1,"w",0,NULL,0,0,0,0,0},
{"flushall",flushallCommand,1,"w",0,NULL,0,0,0,0,0},
- {"sort",sortCommand,-2,"wmS",0,NULL,1,1,1,0,0},
- {"info",infoCommand,-1,"r",0,NULL,0,0,0,0,0},
+ {"sort",sortCommand,-2,"wm",0,NULL,1,1,1,0,0},
+ {"info",infoCommand,-1,"rlt",0,NULL,0,0,0,0,0},
{"monitor",monitorCommand,1,"ars",0,NULL,0,0,0,0,0},
{"ttl",ttlCommand,2,"r",0,NULL,1,1,1,0,0},
{"pttl",pttlCommand,2,"r",0,NULL,1,1,1,0,0},
{"persist",persistCommand,2,"w",0,NULL,1,1,1,0,0},
- {"slaveof",slaveofCommand,3,"as",0,NULL,0,0,0,0,0},
+ {"slaveof",slaveofCommand,3,"ast",0,NULL,0,0,0,0,0},
{"debug",debugCommand,-2,"as",0,NULL,0,0,0,0,0},
{"config",configCommand,-2,"ar",0,NULL,0,0,0,0,0},
- {"subscribe",subscribeCommand,-2,"rps",0,NULL,0,0,0,0,0},
- {"unsubscribe",unsubscribeCommand,-1,"rps",0,NULL,0,0,0,0,0},
- {"psubscribe",psubscribeCommand,-2,"rps",0,NULL,0,0,0,0,0},
- {"punsubscribe",punsubscribeCommand,-1,"rps",0,NULL,0,0,0,0,0},
- {"publish",publishCommand,3,"pf",0,NULL,0,0,0,0,0},
+ {"subscribe",subscribeCommand,-2,"rpslt",0,NULL,0,0,0,0,0},
+ {"unsubscribe",unsubscribeCommand,-1,"rpslt",0,NULL,0,0,0,0,0},
+ {"psubscribe",psubscribeCommand,-2,"rpslt",0,NULL,0,0,0,0,0},
+ {"punsubscribe",punsubscribeCommand,-1,"rpslt",0,NULL,0,0,0,0,0},
+ {"publish",publishCommand,3,"pflt",0,NULL,0,0,0,0,0},
{"watch",watchCommand,-2,"rs",0,noPreloadGetKeys,1,-1,1,0,0},
{"unwatch",unwatchCommand,1,"rs",0,NULL,0,0,0,0,0},
{"restore",restoreCommand,4,"awm",0,NULL,1,1,1,0,0},
{"evalsha",evalShaCommand,-3,"s",0,zunionInterGetKeys,0,0,0,0,0},
{"slowlog",slowlogCommand,-2,"r",0,NULL,0,0,0,0,0},
{"script",scriptCommand,-2,"ras",0,NULL,0,0,0,0,0},
- {"time",timeCommand,1,"rR",0,NULL,0,0,0,0,0}
+ {"time",timeCommand,1,"rR",0,NULL,0,0,0,0,0},
+ {"bitop",bitopCommand,-4,"wm",0,NULL,2,-1,1,0,0},
+ {"bitcount",bitcountCommand,-2,"r",0,NULL,1,1,1,0,0}
};
/*============================ Utility functions ============================ */
if (server.logfile) close(fd);
}
-/* Redis generally does not try to recover from out of memory conditions
- * when allocating objects or strings, it is not clear if it will be possible
- * to report this condition to the client since the networking layer itself
- * is based on heap allocation for send buffers, so we simply abort.
- * At least the code will be simpler to read... */
-void oom(const char *msg) {
- redisLog(REDIS_WARNING, "%s: Out of memory\n",msg);
- sleep(1);
- abort();
-}
-
/* Return the UNIX time in microseconds */
long long ustime(void) {
struct timeval tv;
int j;
for (j = 0; j < server.dbnum; j++) {
+ /* Keys dictionary */
if (dictIsRehashing(server.db[j].dict)) {
dictRehashMilliseconds(server.db[j].dict,1);
break; /* already used our millisecond for this loop... */
}
+ /* Expires */
+ if (dictIsRehashing(server.db[j].expires)) {
+ dictRehashMilliseconds(server.db[j].expires,1);
+ break; /* already used our millisecond for this loop... */
+ }
}
}
* it will get more aggressive to avoid that too much memory is used by
* keys that can be removed from the keyspace. */
void activeExpireCycle(void) {
- int j;
+ int j, iteration = 0;
+ long long start = ustime(), timelimit;
+
+ /* We can use at max REDIS_EXPIRELOOKUPS_TIME_PERC percentage of CPU time
+ * per iteration. Since this function gets called with a frequency of
+ * REDIS_HZ times per second, the following is the max amount of
+ * microseconds we can spend in this function. */
+ timelimit = 1000000*REDIS_EXPIRELOOKUPS_TIME_PERC/REDIS_HZ/100;
+ if (timelimit <= 0) timelimit = 1;
for (j = 0; j < server.dbnum; j++) {
int expired;
/* Continue to expire if at the end of the cycle more than 25%
* of the keys were expired. */
do {
- long num = dictSize(db->expires);
+ unsigned long num = dictSize(db->expires);
+ unsigned long slots = dictSlots(db->expires);
long long now = mstime();
+ /* When there are less than 1% filled slots getting random
+ * keys is expensive, so stop here waiting for better times...
+ * The dictionary will be resized asap. */
+ if (num && slots > DICT_HT_INITIAL_SIZE &&
+ (num*100/slots < 1)) break;
+
+ /* The main collection cycle. Sample random keys among keys
+ * with an expire set, checking for expired ones. */
expired = 0;
if (num > REDIS_EXPIRELOOKUPS_PER_CRON)
num = REDIS_EXPIRELOOKUPS_PER_CRON;
server.stat_expiredkeys++;
}
}
+ /* We can't block forever here even if there are many keys to
+ * expire. So after a given amount of milliseconds return to the
+ * caller waiting for the other active expire cycle. */
+ iteration++;
+ if ((iteration & 0xf) == 0 && /* check once every 16 cycles. */
+ (ustime()-start) > timelimit) return;
} while (expired > REDIS_EXPIRELOOKUPS_PER_CRON/4);
}
}
}
void clientsCron(void) {
- /* Make sure to process at least 1/100 of clients per call.
- * Since this function is called 10 times per second we are sure that
+ /* Make sure to process at least 1/(REDIS_HZ*10) of clients per call.
+ * Since this function is called REDIS_HZ times per second we are sure that
* in the worst case we process all the clients in 10 seconds.
* In normal conditions (a reasonable number of clients) we process
* all the clients in a shorter time. */
int numclients = listLength(server.clients);
- int iterations = numclients/100;
+ int iterations = numclients/(REDIS_HZ*10);
if (iterations < 50)
iterations = (numclients < 50) ? numclients : 50;
}
}
+/* This is our timer interrupt, called REDIS_HZ times per second.
+ * Here is where we do a number of things that need to be done asynchronously.
+ * For instance:
+ *
+ * - Active expired keys collection (it is also performed in a lazy way on
+ * lookup).
+ * - Software watchdong.
+ * - Update some statistic.
+ * - Incremental rehashing of the DBs hash tables.
+ * - Triggering BGSAVE / AOF rewrite, and handling of terminated children.
+ * - Clients timeout of differnet kinds.
+ * - Replication reconnection.
+ * - Many more...
+ *
+ * Everything directly called here will be called REDIS_HZ times per second,
+ * so in order to throttle execution of things we want to do less frequently
+ * a macro is used: run_with_period(milliseconds) { .... }
+ */
+
int serverCron(struct aeEventLoop *eventLoop, long long id, void *clientData) {
- int j, loops = server.cronloops;
+ int j;
REDIS_NOTUSED(eventLoop);
REDIS_NOTUSED(id);
REDIS_NOTUSED(clientData);
* To access a global var is faster than calling time(NULL) */
server.unixtime = time(NULL);
- trackOperationsPerSecond();
+ run_with_period(100) trackOperationsPerSecond();
/* We have just 22 bits per object for LRU information.
* So we use an (eventually wrapping) LRU clock with 10 seconds resolution.
}
/* Show some info about non-empty databases */
- for (j = 0; j < server.dbnum; j++) {
- long long size, used, vkeys;
-
- size = dictSlots(server.db[j].dict);
- used = dictSize(server.db[j].dict);
- vkeys = dictSize(server.db[j].expires);
- if (!(loops % 50) && (used || vkeys)) {
- redisLog(REDIS_VERBOSE,"DB %d: %lld keys (%lld volatile) in %lld slots HT.",j,used,vkeys,size);
- /* dictPrintStats(server.dict); */
+ run_with_period(5000) {
+ for (j = 0; j < server.dbnum; j++) {
+ long long size, used, vkeys;
+
+ size = dictSlots(server.db[j].dict);
+ used = dictSize(server.db[j].dict);
+ vkeys = dictSize(server.db[j].expires);
+ if (used || vkeys) {
+ redisLog(REDIS_VERBOSE,"DB %d: %lld keys (%lld volatile) in %lld slots HT.",j,used,vkeys,size);
+ /* dictPrintStats(server.dict); */
+ }
}
}
* a lot of memory movements in the parent will cause a lot of pages
* copied. */
if (server.rdb_child_pid == -1 && server.aof_child_pid == -1) {
- if (!(loops % 10)) tryResizeHashTables();
+ tryResizeHashTables();
if (server.activerehashing) incrementallyRehash();
}
/* Show information about connected clients */
- if (!(loops % 50)) {
- redisLog(REDIS_VERBOSE,"%d clients connected (%d slaves), %zu bytes in use",
- listLength(server.clients)-listLength(server.slaves),
- listLength(server.slaves),
- zmalloc_used_memory());
+ if (!server.sentinel_mode) {
+ run_with_period(5000) {
+ redisLog(REDIS_VERBOSE,
+ "%d clients connected (%d slaves), %zu bytes in use",
+ listLength(server.clients)-listLength(server.slaves),
+ listLength(server.slaves),
+ zmalloc_used_memory());
+ }
}
/* We need to do a few operations on clients asynchronously. */
/* Replication cron function -- used to reconnect to master and
* to detect transfer failures. */
- if (!(loops % 10)) replicationCron();
+ run_with_period(1000) replicationCron();
+
+ /* Run the sentinel timer if we are in sentinel mode. */
+ run_with_period(100) {
+ if (server.sentinel_mode) sentinelTimer();
+ }
server.cronloops++;
- return 100;
+ return 1000/REDIS_HZ;
}
/* This function gets called every time Redis is entering the
"-LOADING Redis is loading the dataset in memory\r\n"));
shared.slowscripterr = createObject(REDIS_STRING,sdsnew(
"-BUSY Redis is busy running a script. You can only call SCRIPT KILL or SHUTDOWN NOSAVE.\r\n"));
+ shared.masterdownerr = createObject(REDIS_STRING,sdsnew(
+ "-MASTERDOWN Link with MASTER is down and slave-serve-stale-data is set to 'no'.\r\n"));
shared.bgsaveerr = createObject(REDIS_STRING,sdsnew(
"-MISCONF Redis is configured to save RDB snapshots, but is currently not able to persist on disk. Commands that may modify the data set are disabled. Please check Redis logs for details about the error.\r\n"));
shared.roslaveerr = createObject(REDIS_STRING,sdsnew(
shared.del = createStringObject("DEL",3);
shared.rpop = createStringObject("RPOP",4);
shared.lpop = createStringObject("LPOP",4);
+ shared.lpush = createStringObject("LPUSH",5);
for (j = 0; j < REDIS_SHARED_INTEGERS; j++) {
shared.integers[j] = createObject(REDIS_STRING,(void*)(long)j);
shared.integers[j]->encoding = REDIS_ENCODING_INT;
server.aof_rewrite_base_size = 0;
server.aof_rewrite_scheduled = 0;
server.aof_last_fsync = time(NULL);
+ server.aof_rewrite_time_last = -1;
+ server.aof_rewrite_time_start = -1;
+ server.aof_lastbgrewrite_status = REDIS_OK;
server.aof_delayed_fsync = 0;
server.aof_fd = -1;
server.aof_selected_db = -1; /* Make sure the first time will not match */
server.repl_serve_stale_data = 1;
server.repl_slave_ro = 1;
server.repl_down_since = time(NULL);
+ server.slave_priority = REDIS_DEFAULT_SLAVE_PRIORITY;
/* Client output buffer limits */
server.client_obuf_limits[REDIS_CLIENT_LIMIT_CLASS_NORMAL].hard_limit_bytes = 0;
server.delCommand = lookupCommandByCString("del");
server.multiCommand = lookupCommandByCString("multi");
server.lpushCommand = lookupCommandByCString("lpush");
+ server.lpopCommand = lookupCommandByCString("lpop");
+ server.rpopCommand = lookupCommandByCString("rpop");
/* Slow log */
server.slowlog_log_slower_than = REDIS_SLOWLOG_LOG_SLOWER_THAN;
server.slaves = listCreate();
server.monitors = listCreate();
server.unblocked_clients = listCreate();
+ server.ready_keys = listCreate();
createSharedObjects();
adjustOpenFilesLimit();
server.db[j].dict = dictCreate(&dbDictType,NULL);
server.db[j].expires = dictCreate(&keyptrDictType,NULL);
server.db[j].blocking_keys = dictCreate(&keylistDictType,NULL);
+ server.db[j].ready_keys = dictCreate(&setDictType,NULL);
server.db[j].watched_keys = dictCreate(&keylistDictType,NULL);
server.db[j].id = j;
}
server.cronloops = 0;
server.rdb_child_pid = -1;
server.aof_child_pid = -1;
- server.aof_rewrite_buf = sdsempty();
+ aofRewriteBufferReset();
server.aof_buf = sdsempty();
server.lastsave = time(NULL);
+ server.rdb_save_time_last = -1;
+ server.rdb_save_time_start = -1;
server.dirty = 0;
server.stat_numcommands = 0;
server.stat_numconnections = 0;
server.stop_writes_on_bgsave_err = 1;
aeCreateTimeEvent(server.el, 1, serverCron, NULL, NULL);
if (server.ipfd > 0 && aeCreateFileEvent(server.el,server.ipfd,AE_READABLE,
- acceptTcpHandler,NULL) == AE_ERR) oom("creating file event");
+ acceptTcpHandler,NULL) == AE_ERR) redisPanic("Unrecoverable error creating server.ipfd file event.");
if (server.sofd > 0 && aeCreateFileEvent(server.el,server.sofd,AE_READABLE,
- acceptUnixHandler,NULL) == AE_ERR) oom("creating file event");
+ acceptUnixHandler,NULL) == AE_ERR) redisPanic("Unrecoverable error creating server.sofd file event.");
if (server.aof_state == REDIS_AOF_ON) {
server.aof_fd = open(server.aof_filename,
case 's': c->flags |= REDIS_CMD_NOSCRIPT; break;
case 'R': c->flags |= REDIS_CMD_RANDOM; break;
case 'S': c->flags |= REDIS_CMD_SORT_FOR_SCRIPT; break;
+ case 'l': c->flags |= REDIS_CMD_LOADING; break;
+ case 't': c->flags |= REDIS_CMD_STALE; break;
default: redisPanic("Unsupported command flag"); break;
}
f++;
return REDIS_OK;
}
- /* Don't accept wirte commands if this is a read only slave. But
+ /* Don't accept write commands if this is a read only slave. But
* accept write commands if this is our master. */
if (server.masterhost && server.repl_slave_ro &&
!(c->flags & REDIS_MASTER) &&
* we are a slave with a broken link with master. */
if (server.masterhost && server.repl_state != REDIS_REPL_CONNECTED &&
server.repl_serve_stale_data == 0 &&
- c->cmd->proc != infoCommand && c->cmd->proc != slaveofCommand)
+ !(c->cmd->flags & REDIS_CMD_STALE))
{
- addReplyError(c,
- "link with MASTER is down and slave-serve-stale-data is set to no");
+ addReply(c, shared.masterdownerr);
return REDIS_OK;
}
- /* Loading DB? Return an error if the command is not INFO */
- if (server.loading && c->cmd->proc != infoCommand) {
+ /* Loading DB? Return an error if the command has not the
+ * REDIS_CMD_LOADING flag. */
+ if (server.loading && !(c->cmd->flags & REDIS_CMD_LOADING)) {
addReply(c, shared.loadingerr);
return REDIS_OK;
}
- /* Lua script too slow? Only allow SHUTDOWN NOSAVE and SCRIPT KILL. */
+ /* Lua script too slow? Only allow commands with REDIS_CMD_STALE flag. */
if (server.lua_timedout &&
- !(c->cmd->proc != shutdownCommand &&
+ !(c->cmd->proc == shutdownCommand &&
c->argc == 2 &&
tolower(((char*)c->argv[1]->ptr)[0]) == 'n') &&
!(c->cmd->proc == scriptCommand &&
addReply(c,shared.queued);
} else {
call(c,REDIS_CALL_FULL);
+ if (listLength(server.ready_keys))
+ handleClientsBlockedOnLists();
}
return REDIS_OK;
}
/*================================== Commands =============================== */
+/* Return zero if strings are the same, non-zero if they are not.
+ * The comparison is performed in a way that prevents an attacker to obtain
+ * information about the nature of the strings just monitoring the execution
+ * time of the function.
+ *
+ * Note that limiting the comparison length to strings up to 512 bytes we
+ * can avoid leaking any information about the password length and any
+ * possible branch misprediction related leak.
+ */
+int time_independent_strcmp(char *a, char *b) {
+ char bufa[REDIS_AUTHPASS_MAX_LEN], bufb[REDIS_AUTHPASS_MAX_LEN];
+ /* The above two strlen perform len(a) + len(b) operations where either
+ * a or b are fixed (our password) length, and the difference is only
+ * relative to the length of the user provided string, so no information
+ * leak is possible in the following two lines of code. */
+ int alen = strlen(a);
+ int blen = strlen(b);
+ int j;
+ int diff = 0;
+
+ /* We can't compare strings longer than our static buffers.
+ * Note that this will never pass the first test in practical circumstances
+ * so there is no info leak. */
+ if (alen > sizeof(bufa) || blen > sizeof(bufb)) return 1;
+
+ memset(bufa,0,sizeof(bufa)); /* Constant time. */
+ memset(bufb,0,sizeof(bufb)); /* Constant time. */
+ /* Again the time of the following two copies is proportional to
+ * len(a) + len(b) so no info is leaked. */
+ memcpy(bufa,a,alen);
+ memcpy(bufb,b,blen);
+
+ /* Always compare all the chars in the two buffers without
+ * conditional expressions. */
+ for (j = 0; j < sizeof(bufa); j++) {
+ diff |= (bufa[j] ^ bufb[j]);
+ }
+ /* Length must be equal as well. */
+ diff |= alen ^ blen;
+ return diff; /* If zero strings are the same. */
+}
+
void authCommand(redisClient *c) {
if (!server.requirepass) {
addReplyError(c,"Client sent AUTH, but no password is set");
- } else if (!strcmp(c->argv[1]->ptr, server.requirepass)) {
+ } else if (!time_independent_strcmp(c->argv[1]->ptr, server.requirepass)) {
c->authenticated = 1;
addReply(c,shared.ok);
} else {
info = sdscatprintf(info,
"# Persistence\r\n"
"loading:%d\r\n"
+ "rdb_changes_since_last_save:%lld\r\n"
+ "rdb_bgsave_in_progress:%d\r\n"
+ "rdb_last_save_time:%ld\r\n"
+ "rdb_last_bgsave_status:%s\r\n"
+ "rdb_last_bgsave_time_sec:%ld\r\n"
+ "rdb_current_bgsave_time_sec:%ld\r\n"
"aof_enabled:%d\r\n"
- "changes_since_last_save:%lld\r\n"
- "bgsave_in_progress:%d\r\n"
- "last_save_time:%ld\r\n"
- "last_bgsave_status:%s\r\n"
- "bgrewriteaof_in_progress:%d\r\n"
- "bgrewriteaof_scheduled:%d\r\n",
+ "aof_rewrite_in_progress:%d\r\n"
+ "aof_rewrite_scheduled:%d\r\n"
+ "aof_last_rewrite_time_sec:%ld\r\n"
+ "aof_current_rewrite_time_sec:%ld\r\n"
+ "aof_last_bgrewrite_status:%s\r\n",
server.loading,
- server.aof_state != REDIS_AOF_OFF,
server.dirty,
server.rdb_child_pid != -1,
server.lastsave,
- server.lastbgsave_status == REDIS_OK ? "ok" : "err",
+ (server.lastbgsave_status == REDIS_OK) ? "ok" : "err",
+ server.rdb_save_time_last,
+ (server.rdb_child_pid == -1) ?
+ -1 : time(NULL)-server.rdb_save_time_start,
+ server.aof_state != REDIS_AOF_OFF,
server.aof_child_pid != -1,
- server.aof_rewrite_scheduled);
+ server.aof_rewrite_scheduled,
+ server.aof_rewrite_time_last,
+ (server.aof_child_pid == -1) ?
+ -1 : time(NULL)-server.aof_rewrite_time_start,
+ (server.aof_lastbgrewrite_status == REDIS_OK) ? "ok" : "err");
if (server.aof_state != REDIS_AOF_OFF) {
info = sdscatprintf(info,
"aof_base_size:%lld\r\n"
"aof_pending_rewrite:%d\r\n"
"aof_buffer_length:%zu\r\n"
+ "aof_rewrite_buffer_length:%lu\r\n"
"aof_pending_bio_fsync:%llu\r\n"
"aof_delayed_fsync:%lu\r\n",
(long long) server.aof_current_size,
(long long) server.aof_rewrite_base_size,
server.aof_rewrite_scheduled,
sdslen(server.aof_buf),
+ aofRewriteBufferSize(),
bioPendingJobsOfType(REDIS_BIO_AOF_FSYNC),
server.aof_delayed_fsync);
}
if (server.repl_state == REDIS_REPL_TRANSFER) {
info = sdscatprintf(info,
- "master_sync_left_bytes:%ld\r\n"
+ "master_sync_left_bytes:%lld\r\n"
"master_sync_last_io_seconds_ago:%d\r\n"
- ,(long)server.repl_transfer_left,
+ , (long long)
+ (server.repl_transfer_size - server.repl_transfer_read),
(int)(server.unixtime-server.repl_transfer_lastio)
);
}
"master_link_down_since_seconds:%ld\r\n",
(long)server.unixtime-server.repl_down_since);
}
+ info = sdscatprintf(info,
+ "slave_priority:%d\r\n", server.slave_priority);
}
info = sdscatprintf(info,
"connected_slaves:%lu\r\n",
}
if (state == NULL) continue;
info = sdscatprintf(info,"slave%d:%s,%d,%s\r\n",
- slaveid,ip,port,state);
+ slaveid,ip,slave->slave_listening_port,state);
slaveid++;
}
}
}
if (server.aof_state != REDIS_AOF_OFF) {
mem_used -= sdslen(server.aof_buf);
- mem_used -= sdslen(server.aof_rewrite_buf);
+ mem_used -= aofRewriteBufferSize();
}
/* Check if we are over the memory limit. */
fprintf(stderr," ./redis-server /etc/redis/6379.conf\n");
fprintf(stderr," ./redis-server --port 7777\n");
fprintf(stderr," ./redis-server --port 7777 --slaveof 127.0.0.1 8888\n");
- fprintf(stderr," ./redis-server /etc/myredis.conf --loglevel verbose\n");
+ fprintf(stderr," ./redis-server /etc/myredis.conf --loglevel verbose\n\n");
+ fprintf(stderr,"Sentinel mode:\n");
+ fprintf(stderr," ./redis-server /etc/sentinel.conf --sentinel\n");
exit(1);
}
void redisAsciiArt(void) {
#include "asciilogo.h"
char *buf = zmalloc(1024*16);
+ char *mode = "stand alone";
+
+ if (server.cluster_enabled) mode = "cluster";
+ else if (server.sentinel_mode) mode = "sentinel";
snprintf(buf,1024*16,ascii_logo,
REDIS_VERSION,
redisGitSHA1(),
strtol(redisGitDirty(),NULL,10) > 0,
(sizeof(long) == 8) ? "64" : "32",
+<<<<<<< HEAD
"stand alone",
server.port,
+=======
+ mode, server.port,
+>>>>>>> 6b5daa2... First implementation of Redis Sentinel.
(long) getpid()
);
redisLogRaw(REDIS_NOTICE|REDIS_LOG_RAW,buf);
void setupSignalHandlers(void) {
struct sigaction act;
- stack_t stack;
-
- stack.ss_sp = altstack;
- stack.ss_flags = 0;
- stack.ss_size = SIGSTKSZ;
-
- sigaltstack(&stack, NULL);
/* When the SA_SIGINFO flag is set in sa_flags then sa_sigaction is used.
* Otherwise, sa_handler is used. */
sigaction(SIGTERM, &act, NULL);
#ifdef HAVE_BACKTRACE
- /* Use alternate stack so we don't clobber stack in case of segv, or when we run out of stack ..
- * also resethand & nodefer so we can get interrupted (and killed) if we cause SEGV during SEGV handler */
sigemptyset(&act.sa_mask);
- act.sa_flags = SA_NODEFER | SA_ONSTACK | SA_RESETHAND | SA_SIGINFO;
+ act.sa_flags = SA_NODEFER | SA_RESETHAND | SA_SIGINFO;
act.sa_sigaction = sigsegvHandler;
sigaction(SIGSEGV, &act, NULL);
sigaction(SIGBUS, &act, NULL);
void memtest(size_t megabytes, int passes);
+<<<<<<< HEAD
+void redisOutOfMemoryHandler(size_t allocation_size) {
+ redisLog(REDIS_WARNING,"Out Of Memory allocating %zu bytes!",
+ allocation_size);
+ redisPanic("OOM");
+=======
+/* Returns 1 if there is --sentinel among the arguments or if
+ * argv[0] is exactly "redis-sentinel". */
+int checkForSentinelMode(int argc, char **argv) {
+ int j;
+
+ if (strstr(argv[0],"redis-sentinel") != NULL) return 1;
+ for (j = 1; j < argc; j++)
+ if (!strcmp(argv[j],"--sentinel")) return 1;
+ return 0;
+}
+
+/* Function called at startup to load RDB or AOF file in memory. */
+void loadDataFromDisk(void) {
+ long long start = ustime();
+ if (server.aof_state == REDIS_AOF_ON) {
+ if (loadAppendOnlyFile(server.aof_filename) == REDIS_OK)
+ redisLog(REDIS_NOTICE,"DB loaded from append only file: %.3f seconds",(float)(ustime()-start)/1000000);
+ } else {
+ if (rdbLoad(server.rdb_filename) == REDIS_OK) {
+ redisLog(REDIS_NOTICE,"DB loaded from disk: %.3f seconds",
+ (float)(ustime()-start)/1000000);
+ } else if (errno != ENOENT) {
+ redisLog(REDIS_WARNING,"Fatal error loading the DB. Exiting.");
+ exit(1);
+ }
+ }
+>>>>>>> 6b5daa2... First implementation of Redis Sentinel.
+}
+
int main(int argc, char **argv) {
- long long start;
struct timeval tv;
/* We need to initialize our libraries, and the server configuration. */
zmalloc_enable_thread_safeness();
+ zmalloc_set_oom_handler(redisOutOfMemoryHandler);
srand(time(NULL)^getpid());
gettimeofday(&tv,NULL);
dictSetHashFunctionSeed(tv.tv_sec^tv.tv_usec^getpid());
+ server.sentinel_mode = checkForSentinelMode(argc,argv);
initServerConfig();
+ /* We need to init sentinel right now as parsing the configuration file
+ * in sentinel mode will have the effect of populating the sentinel
+ * data structures with master nodes to monitor. */
+ if (server.sentinel_mode) {
+ initSentinelConfig();
+ initSentinel();
+ }
+
if (argc >= 2) {
int j = 1; /* First option to parse in argv[] */
sds options = sdsempty();
loadServerConfig(configfile,options);
sdsfree(options);
} else {
- redisLog(REDIS_WARNING,"Warning: no config file specified, using the default config. In order to specify a config file use 'redis-server /path/to/redis.conf'");
+ redisLog(REDIS_WARNING, "Warning: no config file specified, using the default config. In order to specify a config file use %s /path/to/%s.conf", argv[0], server.sentinel_mode ? "sentinel" : "redis");
}
if (server.daemonize) daemonize();
initServer();
if (server.daemonize) createPidFile();
redisAsciiArt();
- redisLog(REDIS_WARNING,"Server started, Redis version " REDIS_VERSION);
-#ifdef __linux__
- linuxOvercommitMemoryWarning();
-#endif
- start = ustime();
- if (server.aof_state == REDIS_AOF_ON) {
- if (loadAppendOnlyFile(server.aof_filename) == REDIS_OK)
- redisLog(REDIS_NOTICE,"DB loaded from append only file: %.3f seconds",(float)(ustime()-start)/1000000);
- } else {
- if (rdbLoad(server.rdb_filename) == REDIS_OK) {
- redisLog(REDIS_NOTICE,"DB loaded from disk: %.3f seconds",
- (float)(ustime()-start)/1000000);
- } else if (errno != ENOENT) {
- redisLog(REDIS_WARNING,"Fatal error loading the DB. Exiting.");
- exit(1);
- }
+
+ if (!server.sentinel_mode) {
+ /* Things only needed when not runnign in Sentinel mode. */
+ redisLog(REDIS_WARNING,"Server started, Redis version " REDIS_VERSION);
+ #ifdef __linux__
+ linuxOvercommitMemoryWarning();
+ #endif
+ loadDataFromDisk();
+ if (server.ipfd > 0)
+ redisLog(REDIS_NOTICE,"The server is now ready to accept connections on port %d", server.port);
+ if (server.sofd > 0)
+ redisLog(REDIS_NOTICE,"The server is now ready to accept connections at %s", server.unixsocket);
}
- if (server.ipfd > 0)
- redisLog(REDIS_NOTICE,"The server is now ready to accept connections on port %d", server.port);
- if (server.sofd > 0)
- redisLog(REDIS_NOTICE,"The server is now ready to accept connections at %s", server.unixsocket);
+
aeSetBeforeSleepProc(server.el,beforeSleep);
aeMain(server.el);
aeDeleteEventLoop(server.el);
projects / redis.git / blobdiff