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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
Show whitespace changes
Inline
Side-by-side
src/sentinel.c
View file @
ee513ee9
...
...
@@ -1978,46 +1978,25 @@ void sentinelPublishReplyCallback(redisAsyncContext *c, void *reply, void *privd
ri
->
last_pub_time
=
mstime
();
}
/* This is our Pub/Sub callback for the Hello channel. It's useful in order
* to discover other sentinels attached at the same master. */
void
sentinelReceiveHelloMessages
(
redisAsyncContext
*
c
,
void
*
reply
,
void
*
privdata
)
{
sentinelRedisInstance
*
ri
=
c
->
data
,
*
master
;
redisReply
*
r
;
if
(
!
reply
||
!
ri
)
return
;
r
=
reply
;
master
=
(
ri
->
flags
&
SRI_MASTER
)
?
ri
:
ri
->
master
;
/* Update the last activity in the pubsub channel. Note that since we
* receive our messages as well this timestamp can be used to detect
* if the link is probably disconnected even if it seems otherwise. */
ri
->
pc_last_activity
=
mstime
();
/* Sanity check in the reply we expect, so that the code that follows
* can avoid to check for details. */
if
(
r
->
type
!=
REDIS_REPLY_ARRAY
||
r
->
elements
!=
3
||
r
->
element
[
0
]
->
type
!=
REDIS_REPLY_STRING
||
r
->
element
[
1
]
->
type
!=
REDIS_REPLY_STRING
||
r
->
element
[
2
]
->
type
!=
REDIS_REPLY_STRING
||
strcmp
(
r
->
element
[
0
]
->
str
,
"message"
)
!=
0
)
return
;
/* We are not interested in meeting ourselves */
if
(
strstr
(
r
->
element
[
2
]
->
str
,
server
.
runid
)
!=
NULL
)
return
;
{
/* 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
(
r
->
element
[
2
]
->
str
,
r
->
element
[
2
]
->
len
,
","
,
1
,
&
numtokens
);
sentinelRedisInstance
*
si
;
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
]);
...
...
@@ -2025,7 +2004,6 @@ void sentinelReceiveHelloMessages(redisAsyncContext *c, void *reply, void *privd
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
...
...
@@ -2055,41 +2033,71 @@ void sentinelReceiveHelloMessages(redisAsyncContext *c, void *reply, void *privd
/* 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"
,
r
i
,
"%llu"
,
sentinelEvent
(
REDIS_WARNING
,
"+new-epoch"
,
maste
r
,
"%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
]))
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"
,
msg
master
,
"%s %s %d %s %d"
,
msg
master
->
name
,
msg
master
->
addr
->
ip
,
msg
master
->
addr
->
port
,
master
,
"%s %s %d %s %d"
,
master
->
name
,
master
->
addr
->
ip
,
master
->
addr
->
port
,
token
[
5
],
master_port
);
old_addr
=
dupSentinelAddr
(
msgmaster
->
addr
);
sentinelResetMasterAndChangeAddress
(
msgmaster
,
token
[
5
],
master_port
);
sentinelCallClientReconfScript
(
msgmaster
,
old_addr
=
dupSentinelAddr
(
master
->
addr
);
sentinelResetMasterAndChangeAddress
(
master
,
token
[
5
],
master_port
);
sentinelCallClientReconfScript
(
master
,
SENTINEL_OBSERVER
,
"start"
,
old_addr
,
msg
master
->
addr
);
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
* to discover other sentinels attached at the same master. */
void
sentinelReceiveHelloMessages
(
redisAsyncContext
*
c
,
void
*
reply
,
void
*
privdata
)
{
sentinelRedisInstance
*
ri
=
c
->
data
,
*
master
;
redisReply
*
r
;
if
(
!
reply
||
!
ri
)
return
;
r
=
reply
;
master
=
(
ri
->
flags
&
SRI_MASTER
)
?
ri
:
ri
->
master
;
/* Update the last activity in the pubsub channel. Note that since we
* receive our messages as well this timestamp can be used to detect
* if the link is probably disconnected even if it seems otherwise. */
ri
->
pc_last_activity
=
mstime
();
/* Sanity check in the reply we expect, so that the code that follows
* can avoid to check for details. */
if
(
r
->
type
!=
REDIS_REPLY_ARRAY
||
r
->
elements
!=
3
||
r
->
element
[
0
]
->
type
!=
REDIS_REPLY_STRING
||
r
->
element
[
1
]
->
type
!=
REDIS_REPLY_STRING
||
r
->
element
[
2
]
->
type
!=
REDIS_REPLY_STRING
||
strcmp
(
r
->
element
[
0
]
->
str
,
"message"
)
!=
0
)
return
;
/* We are not interested in meeting ourselves */
if
(
strstr
(
r
->
element
[
2
]
->
str
,
server
.
runid
)
!=
NULL
)
return
;
sentinelProcessHelloMessage
(
r
->
element
[
2
]
->
str
,
r
->
element
[
2
]
->
len
);
}
/* Send an "Hello" message via Pub/Sub to the specified 'ri' Redis
...
...
@@ -2176,10 +2184,8 @@ void sentinelPingInstance(sentinelRedisInstance *ri) {
sentinelPingReplyCallback
,
NULL
,
"PING"
);
if
(
retval
!=
REDIS_OK
)
return
;
ri
->
pending_commands
++
;
}
else
if
((
ri
->
flags
&
SRI_SENTINEL
)
==
0
&&
(
now
-
ri
->
last_pub_time
)
>
SENTINEL_PUBLISH_PERIOD
)
{
/* PUBLISH hello messages to masters and slaves. */
}
else
if
((
now
-
ri
->
last_pub_time
)
>
SENTINEL_PUBLISH_PERIOD
)
{
/* PUBLISH hello messages to all the three kinds of instances. */
sentinelSendHello
(
ri
);
}
}
...
...
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