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ruanhaishen
redis
Commits
ee513ee9
Commit
ee513ee9
authored
Mar 14, 2014
by
antirez
Browse files
Sentinel: HELLO processing refactored into sentinelProcessHelloMessage().
parent
9e82461a
Changes
1
Hide whitespace changes
Inline
Side-by-side
src/sentinel.c
View file @
ee513ee9
...
@@ -1978,6 +1978,97 @@ void sentinelPublishReplyCallback(redisAsyncContext *c, void *reply, void *privd
...
@@ -1978,6 +1978,97 @@ void sentinelPublishReplyCallback(redisAsyncContext *c, void *reply, void *privd
ri->last_pub_time = mstime();
ri->last_pub_time = mstime();
}
}
/* Process an hello message received via Pub/Sub in master or slave instance,
* or sent directly to this sentinel via the (fake) PUBLISH command of Sentinel.
*
* If the master name specified in the message is not known, the message is
* discareded. */
void sentinelProcessHelloMessage(char *hello, int hello_len) {
/* Format is composed of 8 tokens:
* 0=ip,1=port,2=runid,3=current_epoch,4=master_name,
* 5=master_ip,6=master_port,7=master_config_epoch. */
int numtokens, port, removed, master_port;
uint64_t current_epoch, master_config_epoch;
char **token = sdssplitlen(hello, hello_len, ",", 1, &numtokens);
sentinelRedisInstance *si, *master;
if (numtokens == 8) {
/* Obtain a reference to the master this hello message is about */
master = sentinelGetMasterByName(token[4]);
if (!master) goto cleanup; /* Unknown master, skip the message. */
/* First, try to see if we already have this sentinel. */
port = atoi(token[1]);
master_port = atoi(token[6]);
si = getSentinelRedisInstanceByAddrAndRunID(
master->sentinels,token[0],port,token[2]);
current_epoch = strtoull(token[3],NULL,10);
master_config_epoch = strtoull(token[7],NULL,10);
if (!si) {
/* If not, remove all the sentinels that have the same runid
* OR the same ip/port, because it's either a restart or a
* network topology change. */
removed = removeMatchingSentinelsFromMaster(master,token[0],port,
token[2]);
if (removed) {
sentinelEvent(REDIS_NOTICE,"-dup-sentinel",master,
"%@ #duplicate of %s:%d or %s",
token[0],port,token[2]);
}
/* Add the new sentinel. */
si = createSentinelRedisInstance(NULL,SRI_SENTINEL,
token[0],port,master->quorum,master);
if (si) {
sentinelEvent(REDIS_NOTICE,"+sentinel",si,"%@");
/* The runid is NULL after a new instance creation and
* for Sentinels we don't have a later chance to fill it,
* so do it now. */
si->runid = sdsnew(token[2]);
sentinelFlushConfig();
}
}
/* Update local current_epoch if received current_epoch is greater.*/
if (current_epoch > sentinel.current_epoch) {
sentinel.current_epoch = current_epoch;
sentinelEvent(REDIS_WARNING,"+new-epoch",master,"%llu",
(unsigned long long) sentinel.current_epoch);
}
/* Update master info if received configuration is newer. */
if (master->config_epoch < master_config_epoch) {
master->config_epoch = master_config_epoch;
if (master_port != master->addr->port ||
strcmp(master->addr->ip, token[5]))
{
sentinelAddr *old_addr;
sentinelEvent(REDIS_WARNING,"+switch-master",
master,"%s %s %d %s %d",
master->name,
master->addr->ip, master->addr->port,
token[5], master_port);
old_addr = dupSentinelAddr(master->addr);
sentinelResetMasterAndChangeAddress(master, token[5], master_port);
sentinelCallClientReconfScript(master,
SENTINEL_OBSERVER,"start",
old_addr,master->addr);
releaseSentinelAddr(old_addr);
}
}
/* Update the state of the Sentinel. */
if (si) si->last_hello_time = mstime();
}
cleanup:
sdsfreesplitres(token,numtokens);
}
/* This is our Pub/Sub callback for the Hello channel. It's useful in order
/* This is our Pub/Sub callback for the Hello channel. It's useful in order
* to discover other sentinels attached at the same master. */
* to discover other sentinels attached at the same master. */
void sentinelReceiveHelloMessages(redisAsyncContext *c, void *reply, void *privdata) {
void sentinelReceiveHelloMessages(redisAsyncContext *c, void *reply, void *privdata) {
...
@@ -2006,90 +2097,7 @@ void sentinelReceiveHelloMessages(redisAsyncContext *c, void *reply, void *privd
...
@@ -2006,90 +2097,7 @@ void sentinelReceiveHelloMessages(redisAsyncContext *c, void *reply, void *privd
/* We are not interested in meeting ourselves */
/* We are not interested in meeting ourselves */
if (strstr(r->element[2]->str,server.runid) != NULL) return;
if (strstr(r->element[2]->str,server.runid) != NULL) return;
{
sentinelProcessHelloMessage(r->element[2]->str, r->element[2]->len);
/* Format is composed of 8 tokens:
* 0=ip,1=port,2=runid,3=current_epoch,4=master_name,
* 5=master_ip,6=master_port,7=master_config_epoch. */
int
numtokens
,
port
,
removed
,
master_port
;
uint64_t
current_epoch
,
master_config_epoch
;
char
**
token
=
sdssplitlen
(
r
->
element
[
2
]
->
str
,
r
->
element
[
2
]
->
len
,
","
,
1
,
&
numtokens
);
sentinelRedisInstance
*
si
;
if
(
numtokens
==
8
)
{
/* First, try to see if we already have this sentinel. */
port
=
atoi
(
token
[
1
]);
master_port
=
atoi
(
token
[
6
]);
si
=
getSentinelRedisInstanceByAddrAndRunID
(
master
->
sentinels
,
token
[
0
],
port
,
token
[
2
]);
current_epoch
=
strtoull
(
token
[
3
],
NULL
,
10
);
master_config_epoch
=
strtoull
(
token
[
7
],
NULL
,
10
);
sentinelRedisInstance
*
msgmaster
;
if
(
!
si
)
{
/* If not, remove all the sentinels that have the same runid
* OR the same ip/port, because it's either a restart or a
* network topology change. */
removed
=
removeMatchingSentinelsFromMaster
(
master
,
token
[
0
],
port
,
token
[
2
]);
if
(
removed
)
{
sentinelEvent
(
REDIS_NOTICE
,
"-dup-sentinel"
,
master
,
"%@ #duplicate of %s:%d or %s"
,
token
[
0
],
port
,
token
[
2
]);
}
/* Add the new sentinel. */
si
=
createSentinelRedisInstance
(
NULL
,
SRI_SENTINEL
,
token
[
0
],
port
,
master
->
quorum
,
master
);
if
(
si
)
{
sentinelEvent
(
REDIS_NOTICE
,
"+sentinel"
,
si
,
"%@"
);
/* The runid is NULL after a new instance creation and
* for Sentinels we don't have a later chance to fill it,
* so do it now. */
si
->
runid
=
sdsnew
(
token
[
2
]);
sentinelFlushConfig
();
}
}
/* Update local current_epoch if received current_epoch is greater.*/
if
(
current_epoch
>
sentinel
.
current_epoch
)
{
sentinel
.
current_epoch
=
current_epoch
;
sentinelEvent
(
REDIS_WARNING
,
"+new-epoch"
,
ri
,
"%llu"
,
(
unsigned
long
long
)
sentinel
.
current_epoch
);
}
/* Update master info if received configuration is newer. */
if
((
msgmaster
=
sentinelGetMasterByName
(
token
[
4
]))
!=
NULL
)
{
if
(
msgmaster
->
config_epoch
<
master_config_epoch
)
{
msgmaster
->
config_epoch
=
master_config_epoch
;
if
(
master_port
!=
msgmaster
->
addr
->
port
||
strcmp
(
msgmaster
->
addr
->
ip
,
token
[
5
]))
{
sentinelAddr
*
old_addr
;
sentinelEvent
(
REDIS_WARNING
,
"+switch-master"
,
msgmaster
,
"%s %s %d %s %d"
,
msgmaster
->
name
,
msgmaster
->
addr
->
ip
,
msgmaster
->
addr
->
port
,
token
[
5
],
master_port
);
old_addr
=
dupSentinelAddr
(
msgmaster
->
addr
);
sentinelResetMasterAndChangeAddress
(
msgmaster
,
token
[
5
],
master_port
);
sentinelCallClientReconfScript
(
msgmaster
,
SENTINEL_OBSERVER
,
"start"
,
old_addr
,
msgmaster
->
addr
);
releaseSentinelAddr
(
old_addr
);
}
}
}
/* Update the state of the Sentinel. */
if
(
si
)
si
->
last_hello_time
=
mstime
();
}
sdsfreesplitres
(
token
,
numtokens
);
}
}
}
/* Send an "Hello" message via Pub/Sub to the specified 'ri' Redis
/* Send an "Hello" message via Pub/Sub to the specified 'ri' Redis
...
@@ -2176,10 +2184,8 @@ void sentinelPingInstance(sentinelRedisInstance *ri) {
...
@@ -2176,10 +2184,8 @@ void sentinelPingInstance(sentinelRedisInstance *ri) {
sentinelPingReplyCallback, NULL, "PING");
sentinelPingReplyCallback, NULL, "PING");
if (retval != REDIS_OK) return;
if (retval != REDIS_OK) return;
ri->pending_commands++;
ri->pending_commands++;
}
else
if
((
ri
->
flags
&
SRI_SENTINEL
)
==
0
&&
} else if ((now - ri->last_pub_time) > SENTINEL_PUBLISH_PERIOD) {
(
now
-
ri
->
last_pub_time
)
>
SENTINEL_PUBLISH_PERIOD
)
/* PUBLISH hello messages to all the three kinds of instances. */
{
/* PUBLISH hello messages to masters and slaves. */
sentinelSendHello(ri);
sentinelSendHello(ri);
}
}
}
}
...
...
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