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我的mqtt协议和emqttd开源项目个人理解（2） - 订阅$SYS主题，捕获客户端上下线消息

2021-11-13 244
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简介： 我的mqtt协议和emqttd开源项目个人理解（2） - 订阅$SYS主题，捕获客户端上下线消息

image.pngimage.png

1、acl.config文件定义了可订阅$SYS主题的权限。

{allow, {user, "dashboard"}, subscribe, ["$SYS/#"]}.
{allow, {ipaddr, "127.0.0.1"}, pubsub, ["$SYS/#", "#"]}.
%%%{deny, all, subscribe, ["$SYS/#", {eq, "#"}]}.
{allow, all}.

2、打开文件vm.args，把节点名称修改为：

#-name emqttd@127.0.0.1
-name emqttd@172.16.6.161

acl.config文件第三行默认是禁止客户端订阅$SYS/#主题。我们把它注释掉。开启一个客户端，订阅$SYS/#主题，消息如下：


源码参见-module(emqttd_broker)这个模块，它会每秒钟publish消息，主题关键字有uptime和datetime等。


源码参见-module(emqttd_stats)这个模块，它会每60秒钟publish消息，把Ets表mqtt_stats的信息发出来。


源码参见-module(emqttd_metrics)这个模块，它的原理同上。

connected to 172.16.6.161:1883
subscribed $SYS/#
message recevied from $SYS/brokers: qos=0
emqttd@172.16.6.161
message recevied from $SYS/brokers/emqttd@172.16.6.161/sysdescr: qos=0
Erlang MQTT Broker
message recevied from $SYS/brokers/emqttd@172.16.6.161/version: qos=0
1.1.3
message recevied from $SYS/brokers/emqttd@172.16.6.161/uptime: qos=0
29 seconds
message recevied from $SYS/brokers/emqttd@172.16.6.161/datetime: qos=0
2017-12-07 11:24:01
message recevied from $SYS/brokers/emqttd@172.16.6.161/uptime: qos=0
30 seconds
message recevied from $SYS/brokers/emqttd@172.16.6.161/datetime: qos=0
2017-12-07 11:24:02
message recevied from $SYS/brokers/emqttd@172.16.6.161/uptime: qos=0
31 seconds
message recevied from $SYS/brokers/emqttd@172.16.6.161/datetime: qos=0
2017-12-07 11:24:03
message recevied from $SYS/brokers/emqttd@172.16.6.161/uptime: qos=0
32 seconds
message recevied from $SYS/brokers/emqttd@172.16.6.161/datetime: qos=0
2017-12-07 11:24:04
message recevied from $SYS/brokers/emqttd@172.16.6.161/uptime: qos=0
33 seconds
message recevied from $SYS/brokers/emqttd@172.16.6.161/datetime: qos=0
2017-12-07 11:24:05
message recevied from $SYS/brokers/emqttd@172.16.6.161/uptime: qos=0
34 seconds
message recevied from $SYS/brokers/emqttd@172.16.6.161/datetime: qos=0
2017-12-07 11:24:06
message recevied from $SYS/brokers/emqttd@172.16.6.161/uptime: qos=0
35 seconds
message recevied from $SYS/brokers/emqttd@172.16.6.161/datetime: qos=0
2017-12-07 11:24:07
message recevied from $SYS/brokers/emqttd@172.16.6.161/uptime: qos=0
36 seconds
message recevied from $SYS/brokers/emqttd@172.16.6.161/datetime: qos=0
2017-12-07 11:24:08
message recevied from $SYS/brokers/emqttd@172.16.6.161/uptime: qos=0
37 seconds
message recevied from $SYS/brokers/emqttd@172.16.6.161/datetime: qos=0
2017-12-07 11:24:09
message recevied from $SYS/brokers/emqttd@172.16.6.161/uptime: qos=0
38 seconds
message recevied from $SYS/brokers/emqttd@172.16.6.161/datetime: qos=0
2017-12-07 11:24:10
message recevied from $SYS/brokers/emqttd@172.16.6.161/uptime: qos=0
39 seconds
message recevied from $SYS/brokers/emqttd@172.16.6.161/datetime: qos=0
2017-12-07 11:24:11
message recevied from $SYS/brokers/emqttd@172.16.6.161/uptime: qos=0
40 seconds
message recevied from $SYS/brokers/emqttd@172.16.6.161/datetime: qos=0
2017-12-07 11:24:12
message recevied from $SYS/brokers/emqttd@172.16.6.161/uptime: qos=0
41 seconds
message recevied from $SYS/brokers/emqttd@172.16.6.161/datetime: qos=0
2017-12-07 11:24:13
message recevied from $SYS/brokers/emqttd@172.16.6.161/uptime: qos=0
42 seconds
message recevied from $SYS/brokers/emqttd@172.16.6.161/datetime: qos=0
2017-12-07 11:24:14
message recevied from $SYS/brokers/emqttd@172.16.6.161/uptime: qos=0
43 seconds
message recevied from $SYS/brokers/emqttd@172.16.6.161/datetime: qos=0
2017-12-07 11:24:15
message recevied from $SYS/brokers/emqttd@172.16.6.161/uptime: qos=0
44 seconds
message recevied from $SYS/brokers/emqttd@172.16.6.161/datetime: qos=0
2017-12-07 11:24:16
message recevied from $SYS/brokers/emqttd@172.16.6.161/uptime: qos=0
45 seconds
message recevied from $SYS/brokers/emqttd@172.16.6.161/datetime: qos=0
2017-12-07 11:24:17
message recevied from $SYS/brokers/emqttd@172.16.6.161/uptime: qos=0
46 seconds
message recevied from $SYS/brokers/emqttd@172.16.6.161/datetime: qos=0
2017-12-07 11:24:18
message recevied from $SYS/brokers/emqttd@172.16.6.161/uptime: qos=0
47 seconds
message recevied from $SYS/brokers/emqttd@172.16.6.161/datetime: qos=0
2017-12-07 11:24:19
message recevied from $SYS/brokers/emqttd@172.16.6.161/uptime: qos=0
48 seconds
message recevied from $SYS/brokers/emqttd@172.16.6.161/datetime: qos=0
2017-12-07 11:24:20
message recevied from $SYS/brokers/emqttd@172.16.6.161/uptime: qos=0
49 seconds
message recevied from $SYS/brokers/emqttd@172.16.6.161/datetime: qos=0
2017-12-07 11:24:21
message recevied from $SYS/brokers/emqttd@172.16.6.161/uptime: qos=0
50 seconds
message recevied from $SYS/brokers/emqttd@172.16.6.161/datetime: qos=0
2017-12-07 11:24:22
message recevied from $SYS/brokers/emqttd@172.16.6.161/uptime: qos=0
51 seconds
message recevied from $SYS/brokers/emqttd@172.16.6.161/datetime: qos=0
2017-12-07 11:24:23
message recevied from $SYS/brokers/emqttd@172.16.6.161/uptime: qos=0
52 seconds
message recevied from $SYS/brokers/emqttd@172.16.6.161/datetime: qos=0
2017-12-07 11:24:24
message recevied from $SYS/brokers/emqttd@172.16.6.161/uptime: qos=0
53 seconds
message recevied from $SYS/brokers/emqttd@172.16.6.161/datetime: qos=0
2017-12-07 11:24:25
message recevied from $SYS/brokers/emqttd@172.16.6.161/uptime: qos=0
54 seconds
message recevied from $SYS/brokers/emqttd@172.16.6.161/datetime: qos=0
2017-12-07 11:24:26
message recevied from $SYS/brokers/emqttd@172.16.6.161/uptime: qos=0
55 seconds
message recevied from $SYS/brokers/emqttd@172.16.6.161/datetime: qos=0
2017-12-07 11:24:27
message recevied from $SYS/brokers/emqttd@172.16.6.161/uptime: qos=0
56 seconds
message recevied from $SYS/brokers/emqttd@172.16.6.161/datetime: qos=0
2017-12-07 11:24:28
message recevied from $SYS/brokers/emqttd@172.16.6.161/uptime: qos=0
57 seconds
message recevied from $SYS/brokers/emqttd@172.16.6.161/datetime: qos=0
2017-12-07 11:24:29
message recevied from $SYS/brokers/emqttd@172.16.6.161/uptime: qos=0
58 seconds
message recevied from $SYS/brokers/emqttd@172.16.6.161/datetime: qos=0
2017-12-07 11:24:30
message recevied from $SYS/brokers/emqttd@172.16.6.161/uptime: qos=0
59 seconds
message recevied from $SYS/brokers/emqttd@172.16.6.161/datetime: qos=0
2017-12-07 11:24:31
message recevied from $SYS/brokers/emqttd@172.16.6.161/stats/subscriptions/max: qos=0
1
message recevied from $SYS/brokers/emqttd@172.16.6.161/stats/subscribers/max: qos=0
1
message recevied from $SYS/brokers/emqttd@172.16.6.161/stats/topics/count: qos=0
53
message recevied from $SYS/brokers/emqttd@172.16.6.161/stats/clients/count: qos=0
1
message recevied from $SYS/brokers/emqttd@172.16.6.161/stats/subscriptions/count: qos=0
1
message recevied from $SYS/brokers/emqttd@172.16.6.161/stats/topics/max: qos=0
53
message recevied from $SYS/brokers/emqttd@172.16.6.161/stats/retained/count: qos=0
3
message recevied from $SYS/brokers/emqttd@172.16.6.161/stats/routes/count: qos=0
1
message recevied from $SYS/brokers/emqttd@172.16.6.161/stats/sessions/count: qos=0
0
message recevied from $SYS/brokers/emqttd@172.16.6.161/stats/retained/max: qos=0
3
message recevied from $SYS/brokers/emqttd@172.16.6.161/stats/sessions/max: qos=0
0
message recevied from $SYS/brokers/emqttd@172.16.6.161/stats/routes/max: qos=0
1
message recevied from $SYS/brokers/emqttd@172.16.6.161/stats/clients/max: qos=0
1
message recevied from $SYS/brokers/emqttd@172.16.6.161/stats/subscribers/count: qos=0
1
message recevied from $SYS/brokers/emqttd@172.16.6.161/metrics/bytes/received: qos=0
69
message recevied from $SYS/brokers/emqttd@172.16.6.161/metrics/packets/pubrel/received: qos=0
0
message recevied from $SYS/brokers/emqttd@172.16.6.161/metrics/packets/publish/received: qos=0
0
message recevied from $SYS/brokers/emqttd@172.16.6.161/metrics/messages/qos1/received: qos=0
0
message recevied from $SYS/brokers/emqttd@172.16.6.161/metrics/messages/qos1/sent: qos=0
0
message recevied from $SYS/brokers/emqttd@172.16.6.161/metrics/packets/sent: qos=0
2
message recevied from $SYS/brokers/emqttd@172.16.6.161/metrics/packets/pingresp: qos=0
0
message recevied from $SYS/brokers/emqttd@172.16.6.161/uptime: qos=0
1 minutes, 0 seconds
message recevied from $SYS/brokers/emqttd@172.16.6.161/datetime: qos=0
2017-12-07 11:24:32
message recevied from $SYS/brokers/emqttd@172.16.6.161/metrics/messages/qos2/received: qos=0
0
message recevied from $SYS/brokers/emqttd@172.16.6.161/metrics/packets/disconnect: qos=0
0
message recevied from $SYS/brokers/emqttd@172.16.6.161/metrics/messages/sent: qos=0
0
message recevied from $SYS/brokers/emqttd@172.16.6.161/metrics/bytes/sent: qos=0
4249
message recevied from $SYS/brokers/emqttd@172.16.6.161/metrics/messages/retained: qos=0
0
message recevied from $SYS/brokers/emqttd@172.16.6.161/metrics/packets/pubcomp/sent: qos=0
0
message recevied from $SYS/brokers/emqttd@172.16.6.161/metrics/packets/pubrec/received: qos=0
0
message recevied from $SYS/brokers/emqttd@172.16.6.161/metrics/packets/pubcomp/received: qos=0
0
message recevied from $SYS/brokers/emqttd@172.16.6.161/metrics/messages/dropped: qos=0
0
message recevied from $SYS/brokers/emqttd@172.16.6.161/metrics/packets/received: qos=0
2
message recevied from $SYS/brokers: qos=0
emqttd@172.16.6.161
message recevied from $SYS/brokers/emqttd@172.16.6.161/version: qos=0
1.1.3
message recevied from $SYS/brokers/emqttd@172.16.6.161/sysdescr: qos=0
Erlang MQTT Broker
message recevied from $SYS/brokers/emqttd@172.16.6.161/metrics/packets/publish/sent: qos=0
0
message recevied from $SYS/brokers/emqttd@172.16.6.161/metrics/packets/pingreq: qos=0
0
message recevied from $SYS/brokers/emqttd@172.16.6.161/metrics/messages/qos0/sent: qos=0
0
message recevied from $SYS/brokers/emqttd@172.16.6.161/metrics/packets/puback/sent: qos=0
0
message recevied from $SYS/brokers/emqttd@172.16.6.161/metrics/packets/subscribe: qos=0
1
message recevied from $SYS/brokers/emqttd@172.16.6.161/metrics/packets/suback: qos=0
1
message recevied from $SYS/brokers/emqttd@172.16.6.161/metrics/packets/pubrel/sent: qos=0
0
message recevied from $SYS/brokers/emqttd@172.16.6.161/metrics/packets/connect: qos=0
1
message recevied from $SYS/brokers/emqttd@172.16.6.161/metrics/packets/connack: qos=0
1
message recevied from $SYS/brokers/emqttd@172.16.6.161/metrics/packets/unsubscribe: qos=0
0
message recevied from $SYS/brokers/emqttd@172.16.6.161/metrics/messages/received: qos=0
0
message recevied from $SYS/brokers/emqttd@172.16.6.161/metrics/messages/qos2/sent: qos=0
0
message recevied from $SYS/brokers/emqttd@172.16.6.161/metrics/packets/pubrec/sent: qos=0
0
message recevied from $SYS/brokers/emqttd@172.16.6.161/metrics/packets/unsuback: qos=0
0
message recevied from $SYS/brokers/emqttd@172.16.6.161/metrics/messages/qos0/received: qos=0
0
message recevied from $SYS/brokers/emqttd@172.16.6.161/metrics/packets/puback/received: qos=0
0
message recevied from $SYS/brokers/emqttd@172.16.6.161/uptime: qos=0
1 minutes, 1 seconds
message recevied from $SYS/brokers/emqttd@172.16.6.161/datetime: qos=0
2017-12-07 11:24:33
message recevied from $SYS/brokers/emqttd@172.16.6.161/uptime: qos=0
1 minutes, 2 seconds
message recevied from $SYS/brokers/emqttd@172.16.6.161/datetime: qos=0
2017-12-07 11:24:34
message recevied from $SYS/brokers/emqttd@172.16.6.161/uptime: qos=0
1 minutes, 3 seconds
message recevied from $SYS/brokers/emqttd@172.16.6.161/datetime: qos=0
2017-12-07 11:24:35
message recevied from $SYS/brokers/emqttd@172.16.6.161/uptime: qos=0
1 minutes, 4 seconds
message recevied from $SYS/brokers/emqttd@172.16.6.161/datetime: qos=0
2017-12-07 11:24:36
message recevied from $SYS/brokers/emqttd@172.16.6.161/uptime: qos=0
1 minutes, 5 seconds
message recevied from $SYS/brokers/emqttd@172.16.6.161/datetime: qos=0
2017-12-07 11:24:37
message recevied from $SYS/brokers/emqttd@172.16.6.161/uptime: qos=0
1 minutes, 6 seconds
message recevied from $SYS/brokers/emqttd@172.16.6.161/datetime: qos=0
2017-12-07 11:24:38
message recevied from $SYS/brokers/emqttd@172.16.6.161/uptime: qos=0
1 minutes, 7 seconds
message recevied from $SYS/brokers/emqttd@172.16.6.161/datetime: qos=0
2017-12-07 11:24:39
message recevied from $SYS/brokers/emqttd@172.16.6.161/uptime: qos=0
1 minutes, 8 seconds
message recevied from $SYS/brokers/emqttd@172.16.6.161/datetime: qos=0
2017-12-07 11:24:40
message recevied from $SYS/brokers/emqttd@172.16.6.161/uptime: qos=0
1 minutes, 9 seconds
message recevied from $SYS/brokers/emqttd@172.16.6.161/datetime: qos=0
2017-12-07 11:24:41
message recevied from $SYS/brokers/emqttd@172.16.6.161/uptime: qos=0
1 minutes, 10 seconds
message recevied from $SYS/brokers/emqttd@172.16.6.161/datetime: qos=0
2017-12-07 11:24:42
message recevied from $SYS/brokers/emqttd@172.16.6.161/uptime: qos=0
1 minutes, 11 seconds
message recevied from $SYS/brokers/emqttd@172.16.6.161/datetime: qos=0
2017-12-07 11:24:43
message recevied from $SYS/brokers/emqttd@172.16.6.161/uptime: qos=0
1 minutes, 12 seconds
message recevied from $SYS/brokers/emqttd@172.16.6.161/datetime: qos=0
2017-12-07 11:24:44
message recevied from $SYS/brokers/emqttd@172.16.6.161/uptime: qos=0
1 minutes, 13 seconds
message recevied from $SYS/brokers/emqttd@172.16.6.161/datetime: qos=0
2017-12-07 11:24:45
message recevied from $SYS/brokers/emqttd@172.16.6.161/uptime: qos=0
1 minutes, 14 seconds
message recevied from $SYS/brokers/emqttd@172.16.6.161/datetime: qos=0
2017-12-07 11:24:46
message recevied from $SYS/brokers/emqttd@172.16.6.161/uptime: qos=0
1 minutes, 15 seconds
message recevied from $SYS/brokers/emqttd@172.16.6.161/datetime: qos=0
2017-12-07 11:24:47
message recevied from $SYS/brokers/emqttd@172.16.6.161/uptime: qos=0
1 minutes, 16 seconds
message recevied from $SYS/brokers/emqttd@172.16.6.161/datetime: qos=0
2017-12-07 11:24:48
message recevied from $SYS/brokers/emqttd@172.16.6.161/uptime: qos=0
1 minutes, 17 seconds
message recevied from $SYS/brokers/emqttd@172.16.6.161/datetime: qos=0
2017-12-07 11:24:49
message recevied from $SYS/brokers/emqttd@172.16.6.161/uptime: qos=0
1 minutes, 18 seconds
message recevied from $SYS/brokers/emqttd@172.16.6.161/datetime: qos=0
2017-12-07 11:24:50
message recevied from $SYS/brokers/emqttd@172.16.6.161/uptime: qos=0
1 minutes, 19 seconds
message recevied from $SYS/brokers/emqttd@172.16.6.161/datetime: qos=0
2017-12-07 11:24:51
message recevied from $SYS/brokers/emqttd@172.16.6.161/uptime: qos=0
1 minutes, 20 seconds
message recevied from $SYS/brokers/emqttd@172.16.6.161/datetime: qos=0
2017-12-07 11:24:52
message recevied from $SYS/brokers/emqttd@172.16.6.161/uptime: qos=0
1 minutes, 21 seconds
message recevied from $SYS/brokers/emqttd@172.16.6.161/datetime: qos=0
2017-12-07 11:24:53
message recevied from $SYS/brokers/emqttd@172.16.6.161/uptime: qos=0
1 minutes, 22 seconds
message recevied from $SYS/brokers/emqttd@172.16.6.161/datetime: qos=0
2017-12-07 11:24:54
message recevied from $SYS/brokers/emqttd@172.16.6.161/uptime: qos=0
1 minutes, 23 seconds
message recevied from $SYS/brokers/emqttd@172.16.6.161/datetime: qos=0
2017-12-07 11:24:55
message recevied from $SYS/brokers/emqttd@172.16.6.161/uptime: qos=0
1 minutes, 24 seconds
message recevied from $SYS/brokers/emqttd@172.16.6.161/datetime: qos=0
2017-12-07 11:24:56
message recevied from $SYS/brokers/emqttd@172.16.6.161/uptime: qos=0
1 minutes, 25 seconds
message recevied from $SYS/brokers/emqttd@172.16.6.161/datetime: qos=0
2017-12-07 11:24:57
message recevied from $SYS/brokers/emqttd@172.16.6.161/uptime: qos=0
1 minutes, 26 seconds
message recevied from $SYS/brokers/emqttd@172.16.6.161/datetime: qos=0
2017-12-07 11:24:58
message recevied from $SYS/brokers/emqttd@172.16.6.161/uptime: qos=0
1 minutes, 27 seconds
message recevied from $SYS/brokers/emqttd@172.16.6.161/datetime: qos=0
2017-12-07 11:24:59
message recevied from $SYS/brokers/emqttd@172.16.6.161/uptime: qos=0
1 minutes, 28 seconds
message recevied from $SYS/brokers/emqttd@172.16.6.161/datetime: qos=0
2017-12-07 11:25:00
message recevied from $SYS/brokers/emqttd@172.16.6.161/uptime: qos=0
1 minutes, 29 seconds
message recevied from $SYS/brokers/emqttd@172.16.6.161/datetime: qos=0
2017-12-07 11:25:01
message recevied from $SYS/brokers/emqttd@172.16.6.161/uptime: qos=0
1 minutes, 30 seconds
message recevied from $SYS/brokers/emqttd@172.16.6.161/datetime: qos=0
2017-12-07 11:25:02
message recevied from $SYS/brokers/emqttd@172.16.6.161/uptime: qos=0
1 minutes, 31 seconds
message recevied from $SYS/brokers/emqttd@172.16.6.161/datetime: qos=0
2017-12-07 11:25:03
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2017-12-07 11:25:04
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1 minutes, 33 seconds
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2017-12-07 11:25:05
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1 minutes, 34 seconds
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2017-12-07 11:25:06
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1 minutes, 35 seconds
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2017-12-07 11:25:07
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1 minutes, 36 seconds
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2017-12-07 11:25:08
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2017-12-07 11:25:09
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2017-12-07 11:25:10
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1 minutes, 39 seconds
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2017-12-07 11:25:11
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1 minutes, 40 seconds
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2017-12-07 11:25:12
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1 minutes, 41 seconds
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2017-12-07 11:25:13
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1 minutes, 42 seconds
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2017-12-07 11:25:14
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1 minutes, 43 seconds
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2017-12-07 11:25:15
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1 minutes, 44 seconds
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2017-12-07 11:25:16
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1 minutes, 45 seconds
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2017-12-07 11:25:17
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1 minutes, 46 seconds
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2017-12-07 11:25:18
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1 minutes, 47 seconds
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2017-12-07 11:25:19
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2017-12-07 11:25:20
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2017-12-07 11:25:21
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2017-12-07 11:25:22
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2017-12-07 11:25:23
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1 minutes, 52 seconds
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2017-12-07 11:25:24
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1 minutes, 53 seconds
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2017-12-07 11:25:25
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1 minutes, 54 seconds
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2017-12-07 11:25:26
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1 minutes, 55 seconds
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2017-12-07 11:25:27
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1 minutes, 56 seconds
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2017-12-07 11:25:28
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1 minutes, 57 seconds
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2017-12-07 11:25:29
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{"clientid":"861694030142478","username":"invtGTerm","ipaddress":"172.16.6.155","session":false,"protocol":3,"connack":0,"ts":1512617129}
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1 minutes, 58 seconds
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2017-12-07 11:25:30
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1 minutes, 59 seconds
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2017-12-07 11:25:31
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53
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125
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2017-12-07 11:25:32
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emqttd@172.16.6.161
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1.1.3
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Erlang MQTT Broker
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2 minutes, 1 seconds
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2017-12-07 11:25:33
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2017-12-07 11:25:34
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2017-12-07 11:25:35
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2 minutes, 4 seconds
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2017-12-07 11:25:36
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2 minutes, 5 seconds
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2017-12-07 11:25:37
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2017-12-07 11:25:38
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2 minutes, 7 seconds
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2017-12-07 11:25:39
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2 minutes, 8 seconds
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2017-12-07 11:25:40
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{"clientid":"861694030142478","reason":"normal","ts":1512617141}
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2 minutes, 9 seconds
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2017-12-07 11:25:41
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2 minutes, 10 seconds
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2017-12-07 11:25:42
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2 minutes, 11 seconds
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2017-12-07 11:25:43
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2 minutes, 12 seconds
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2017-12-07 11:25:44
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2 minutes, 13 seconds
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2017-12-07 11:25:45
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2 minutes, 14 seconds
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2017-12-07 11:25:46
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2 minutes, 15 seconds
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2017-12-07 11:25:47
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2 minutes, 16 seconds
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2017-12-07 11:25:48
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2 minutes, 17 seconds
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2017-12-07 11:25:49
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2 minutes, 18 seconds
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2017-12-07 11:25:50
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2 minutes, 19 seconds
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2017-12-07 11:25:51
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2 minutes, 20 seconds
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2017-12-07 11:25:52
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2 minutes, 21 seconds
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2017-12-07 11:25:53
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2 minutes, 22 seconds
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2017-12-07 11:25:54
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2 minutes, 23 seconds
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2017-12-07 11:25:55
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2 minutes, 24 seconds
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2017-12-07 11:25:56
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2 minutes, 25 seconds
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2017-12-07 11:25:57
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2 minutes, 26 seconds
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2017-12-07 11:25:58
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2 minutes, 27 seconds
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2017-12-07 11:25:59
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2 minutes, 28 seconds
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2017-12-07 11:26:00
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2 minutes, 29 seconds
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2017-12-07 11:26:01
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2 minutes, 30 seconds
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2017-12-07 11:26:02
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2 minutes, 31 seconds
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2017-12-07 11:26:03
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2 minutes, 32 seconds
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2017-12-07 11:26:04
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2 minutes, 33 seconds
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2017-12-07 11:26:05
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2 minutes, 34 seconds
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2017-12-07 11:26:06
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2 minutes, 35 seconds
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2017-12-07 11:26:07
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2 minutes, 36 seconds
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2017-12-07 11:26:08
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2 minutes, 37 seconds
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2017-12-07 11:26:09
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2 minutes, 38 seconds
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2017-12-07 11:26:10
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2 minutes, 39 seconds
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2017-12-07 11:26:11
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2 minutes, 40 seconds
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2017-12-07 11:26:12
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2 minutes, 41 seconds
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2017-12-07 11:26:13
message recevied from $SYS/brokers/emqttd@172.16.6.161/uptime: qos=0
2 minutes, 42 seconds
message recevied from $SYS/brokers/emqttd@172.16.6.161/datetime: qos=0
2017-12-07 11:26:14
message recevied from $SYS/brokers/emqttd@172.16.6.161/uptime: qos=0
2 minutes, 43 seconds
message recevied from $SYS/brokers/emqttd@172.16.6.161/datetime: qos=0
2017-12-07 11:26:15
message recevied from $SYS/brokers/emqttd@172.16.6.161/uptime: qos=0
2 minutes, 44 seconds
message recevied from $SYS/brokers/emqttd@172.16.6.161/datetime: qos=0
2017-12-07 11:26:16
message recevied from $SYS/brokers/emqttd@172.16.6.161/uptime: qos=0
2 minutes, 45 seconds
message recevied from $SYS/brokers/emqttd@172.16.6.161/datetime: qos=0
2017-12-07 11:26:17
message recevied from $SYS/brokers/emqttd@172.16.6.161/uptime: qos=0
2 minutes, 46 seconds
message recevied from $SYS/brokers/emqttd@172.16.6.161/datetime: qos=0
2017-12-07 11:26:18
message recevied from $SYS/brokers/emqttd@172.16.6.161/uptime: qos=0
2 minutes, 47 seconds
message recevied from $SYS/brokers/emqttd@172.16.6.161/datetime: qos=0
2017-12-07 11:26:19
message recevied from $SYS/brokers/emqttd@172.16.6.161/uptime: qos=0
2 minutes, 48 seconds
message recevied from $SYS/brokers/emqttd@172.16.6.161/datetime: qos=0
2017-12-07 11:26:20
message recevied from $SYS/brokers/emqttd@172.16.6.161/uptime: qos=0
2 minutes, 49 seconds
message recevied from $SYS/brokers/emqttd@172.16.6.161/datetime: qos=0
2017-12-07 11:26:21
message recevied from $SYS/brokers/emqttd@172.16.6.161/uptime: qos=0
2 minutes, 50 seconds
message recevied from $SYS/brokers/emqttd@172.16.6.161/datetime: qos=0
2017-12-07 11:26:22
message recevied from $SYS/brokers/emqttd@172.16.6.161/uptime: qos=0
2 minutes, 51 seconds
message recevied from $SYS/brokers/emqttd@172.16.6.161/datetime: qos=0
2017-12-07 11:26:23
message recevied from $SYS/brokers/emqttd@172.16.6.161/uptime: qos=0
2 minutes, 52 seconds
message recevied from $SYS/brokers/emqttd@172.16.6.161/datetime: qos=0
2017-12-07 11:26:24
message recevied from $SYS/brokers/emqttd@172.16.6.161/uptime: qos=0
2 minutes, 53 seconds
message recevied from $SYS/brokers/emqttd@172.16.6.161/datetime: qos=0
2017-12-07 11:26:25
message recevied from $SYS/brokers/emqttd@172.16.6.161/uptime: qos=0
2 minutes, 54 seconds
message recevied from $SYS/brokers/emqttd@172.16.6.161/datetime: qos=0
2017-12-07 11:26:26
message recevied from $SYS/brokers/emqttd@172.16.6.161/uptime: qos=0
2 minutes, 55 seconds
message recevied from $SYS/brokers/emqttd@172.16.6.161/datetime: qos=0
2017-12-07 11:26:27
message recevied from $SYS/brokers/emqttd@172.16.6.161/uptime: qos=0
2 minutes, 56 seconds
message recevied from $SYS/brokers/emqttd@172.16.6.161/datetime: qos=0
2017-12-07 11:26:28
message recevied from $SYS/brokers/emqttd@172.16.6.161/uptime: qos=0
2 minutes, 57 seconds
message recevied from $SYS/brokers/emqttd@172.16.6.161/datetime: qos=0
2017-12-07 11:26:29
message recevied from $SYS/brokers/emqttd@172.16.6.161/uptime: qos=0
2 minutes, 58 seconds
message recevied from $SYS/brokers/emqttd@172.16.6.161/datetime: qos=0
2017-12-07 11:26:30
message recevied from $SYS/brokers/emqttd@172.16.6.161/uptime: qos=0
2 minutes, 59 seconds
message recevied from $SYS/brokers/emqttd@172.16.6.161/datetime: qos=0
2017-12-07 11:26:31
message recevied from $SYS/brokers/emqttd@172.16.6.161/stats/subscriptions/max: qos=0
1
message recevied from $SYS/brokers/emqttd@172.16.6.161/stats/subscribers/max: qos=0
1
message recevied from $SYS/brokers/emqttd@172.16.6.161/stats/topics/count: qos=0
53
message recevied from $SYS/brokers/emqttd@172.16.6.161/stats/clients/count: qos=0
1
message recevied from $SYS/brokers/emqttd@172.16.6.161/stats/subscriptions/count: qos=0
1
message recevied from $SYS/brokers/emqttd@172.16.6.161/stats/topics/max: qos=0
53
message recevied from $SYS/brokers/emqttd@172.16.6.161/stats/retained/count: qos=0
3
message recevied from $SYS/brokers/emqttd@172.16.6.161/stats/routes/count: qos=0
1
message recevied from $SYS/brokers/emqttd@172.16.6.161/stats/sessions/count: qos=0
0
message recevied from $SYS/brokers/emqttd@172.16.6.161/stats/retained/max: qos=0
3
message recevied from $SYS/brokers/emqttd@172.16.6.161/stats/sessions/max: qos=0
0
message recevied from $SYS/brokers/emqttd@172.16.6.161/stats/routes/max: qos=0
1
message recevied from $SYS/brokers/emqttd@172.16.6.161/stats/clients/max: qos=0
2
message recevied from $SYS/brokers/emqttd@172.16.6.161/stats/subscribers/count: qos=0
1
message recevied from $SYS/brokers/emqttd@172.16.6.161/metrics/bytes/received: qos=0
127
message recevied from $SYS/brokers/emqttd@172.16.6.161/metrics/packets/pubrel/received: qos=0
0
message recevied from $SYS/brokers/emqttd@172.16.6.161/metrics/packets/publish/received: qos=0
0
message recevied from $SYS/brokers/emqttd@172.16.6.161/metrics/messages/qos1/received: qos=0
0
message recevied from $SYS/brokers/emqttd@172.16.6.161/metrics/messages/qos1/sent: qos=0
0
message recevied from $SYS/brokers/emqttd@172.16.6.161/metrics/packets/sent: qos=0
3
message recevied from $SYS/brokers/emqttd@172.16.6.161/metrics/packets/pingresp: qos=0
0
message recevied from $SYS/brokers/emqttd@172.16.6.161/uptime: qos=0
3 minutes, 0 seconds
message recevied from $SYS/brokers/emqttd@172.16.6.161/datetime: qos=0
2017-12-07 11:26:32
message recevied from $SYS/brokers/emqttd@172.16.6.161/metrics/messages/qos2/received: qos=0
0
message recevied from $SYS/brokers/emqttd@172.16.6.161/metrics/packets/disconnect: qos=0
1
message recevied from $SYS/brokers/emqttd@172.16.6.161/metrics/messages/sent: qos=0
0
message recevied from $SYS/brokers/emqttd@172.16.6.161/metrics/bytes/sent: qos=0
26419
message recevied from $SYS/brokers/emqttd@172.16.6.161/metrics/messages/retained: qos=0
3
message recevied from $SYS/brokers/emqttd@172.16.6.161/metrics/packets/pubcomp/sent: qos=0
0
message recevied from $SYS/brokers/emqttd@172.16.6.161/metrics/packets/pubrec/received: qos=0
0
message recevied from $SYS/brokers/emqttd@172.16.6.161/metrics/packets/pubcomp/received: qos=0
0
message recevied from $SYS/brokers/emqttd@172.16.6.161/metrics/messages/dropped: qos=0
0
message recevied from $SYS/brokers/emqttd@172.16.6.161/metrics/packets/received: qos=0
4
message recevied from $SYS/brokers: qos=0
emqttd@172.16.6.161
message recevied from $SYS/brokers/emqttd@172.16.6.161/version: qos=0
1.1.3
message recevied from $SYS/brokers/emqttd@172.16.6.161/sysdescr: qos=0
Erlang MQTT Broker
message recevied from $SYS/brokers/emqttd@172.16.6.161/metrics/packets/publish/sent: qos=0
0
message recevied from $SYS/brokers/emqttd@172.16.6.161/metrics/packets/pingreq: qos=0
0
message recevied from $SYS/brokers/emqttd@172.16.6.161/metrics/messages/qos0/sent: qos=0
0
message recevied from $SYS/brokers/emqttd@172.16.6.161/metrics/packets/puback/sent: qos=0
0
message recevied from $SYS/brokers/emqttd@172.16.6.161/metrics/packets/subscribe: qos=0
1
message recevied from $SYS/brokers/emqttd@172.16.6.161/metrics/packets/suback: qos=0
1
message recevied from $SYS/brokers/emqttd@172.16.6.161/metrics/packets/pubrel/sent: qos=0
0
message recevied from $SYS/brokers/emqttd@172.16.6.161/metrics/packets/connect: qos=0
2
message recevied from $SYS/brokers/emqttd@172.16.6.161/metrics/packets/connack: qos=0
2
message recevied from $SYS/brokers/emqttd@172.16.6.161/metrics/packets/unsubscribe: qos=0
0
message recevied from $SYS/brokers/emqttd@172.16.6.161/metrics/messages/received: qos=0
0
message recevied from $SYS/brokers/emqttd@172.16.6.161/metrics/messages/qos2/sent: qos=0
0
message recevied from $SYS/brokers/emqttd@172.16.6.161/metrics/packets/pubrec/sent: qos=0
0
message recevied from $SYS/brokers/emqttd@172.16.6.161/metrics/packets/unsuback: qos=0
0
message recevied from $SYS/brokers/emqttd@172.16.6.161/metrics/messages/qos0/received: qos=0
0
message recevied from $SYS/brokers/emqttd@172.16.6.161/metrics/packets/puback/received: qos=0
0
message recevied from $SYS/brokers/emqttd@172.16.6.161/uptime: qos=0
3 minutes, 1 seconds
message recevied from $SYS/brokers/emqttd@172.16.6.161/datetime: qos=0
2017-12-07 11:26:33
message recevied from $SYS/brokers/emqttd@172.16.6.161/uptime: qos=0
3 minutes, 2 seconds
message recevied from $SYS/brokers/emqttd@172.16.6.161/datetime: qos=0
2017-12-07 11:26:34
message recevied from $SYS/brokers/emqttd@172.16.6.161/uptime: qos=0
3 minutes, 3 seconds
message recevied from $SYS/brokers/emqttd@172.16.6.161/datetime: qos=0
2017-12-07 11:26:35
message recevied from $SYS/brokers/emqttd@172.16.6.161/uptime: qos=0
3 minutes, 4 seconds
message recevied from $SYS/brokers/emqttd@172.16.6.161/datetime: qos=0
2017-12-07 11:26:36
message recevied from $SYS/brokers/emqttd@172.16.6.161/uptime: qos=0
3 minutes, 5 seconds
message recevied from $SYS/brokers/emqttd@172.16.6.161/datetime: qos=0
2017-12-07 11:26:37
message recevied from $SYS/brokers/emqttd@172.16.6.161/uptime: qos=0
3 minutes, 6 seconds
message recevied from $SYS/brokers/emqttd@172.16.6.161/datetime: qos=0
2017-12-07 11:26:38
message recevied from $SYS/brokers/emqttd@172.16.6.161/uptime: qos=0
3 minutes, 7 seconds
message recevied from $SYS/brokers/emqttd@172.16.6.161/datetime: qos=0
2017-12-07 11:26:39
message recevied from $SYS/brokers/emqttd@172.16.6.161/uptime: qos=0
3 minutes, 8 seconds
message recevied from $SYS/brokers/emqttd@172.16.6.161/datetime: qos=0
2017-12-07 11:26:40
message recevied from $SYS/brokers/emqttd@172.16.6.161/uptime: qos=0
3 minutes, 9 seconds
message recevied from $SYS/brokers/emqttd@172.16.6.161/datetime: qos=0
2017-12-07 11:26:41
message recevied from $SYS/brokers/emqttd@172.16.6.161/uptime: qos=0
3 minutes, 10 seconds
message recevied from $SYS/brokers/emqttd@172.16.6.161/datetime: qos=0
2017-12-07 11:26:42
message recevied from $SYS/brokers/emqttd@172.16.6.161/uptime: qos=0
3 minutes, 11 seconds
message recevied from $SYS/brokers/emqttd@172.16.6.161/datetime: qos=0
2017-12-07 11:26:43
message recevied from $SYS/brokers/emqttd@172.16.6.161/uptime: qos=0
3 minutes, 12 seconds
message recevied from $SYS/brokers/emqttd@172.16.6.161/datetime: qos=0
2017-12-07 11:26:44
message recevied from $SYS/brokers/emqttd@172.16.6.161/uptime: qos=0
3 minutes, 13 seconds
message recevied from $SYS/brokers/emqttd@172.16.6.161/datetime: qos=0
2017-12-07 11:26:45
message recevied from $SYS/brokers/emqttd@172.16.6.161/uptime: qos=0
3 minutes, 14 seconds
message recevied from $SYS/brokers/emqttd@172.16.6.161/datetime: qos=0
2017-12-07 11:26:46
message recevied from $SYS/brokers/emqttd@172.16.6.161/uptime: qos=0
3 minutes, 15 seconds
message recevied from $SYS/brokers/emqttd@172.16.6.161/datetime: qos=0
2017-12-07 11:26:47
message recevied from $SYS/brokers/emqttd@172.16.6.161/uptime: qos=0
3 minutes, 16 seconds
message recevied from $SYS/brokers/emqttd@172.16.6.161/datetime: qos=0
2017-12-07 11:26:48
message recevied from $SYS/brokers/emqttd@172.16.6.161/uptime: qos=0
3 minutes, 17 seconds
message recevied from $SYS/brokers/emqttd@172.16.6.161/datetime: qos=0
2017-12-07 11:26:49
message recevied from $SYS/brokers/emqttd@172.16.6.161/uptime: qos=0
3 minutes, 18 seconds
message recevied from $SYS/brokers/emqttd@172.16.6.161/datetime: qos=0
2017-12-07 11:26:50
message recevied from $SYS/brokers/emqttd@172.16.6.161/uptime: qos=0
3 minutes, 19 seconds
message recevied from $SYS/brokers/emqttd@172.16.6.161/datetime: qos=0
2017-12-07 11:26:51
message recevied from $SYS/brokers/emqttd@172.16.6.161/uptime: qos=0
3 minutes, 20 seconds
message recevied from $SYS/brokers/emqttd@172.16.6.161/datetime: qos=0
2017-12-07 11:26:52
message recevied from $SYS/brokers/emqttd@172.16.6.161/uptime: qos=0
3 minutes, 21 seconds
message recevied from $SYS/brokers/emqttd@172.16.6.161/datetime: qos=0
2017-12-07 11:26:53
message recevied from $SYS/brokers/emqttd@172.16.6.161/uptime: qos=0
3 minutes, 22 seconds
message recevied from $SYS/brokers/emqttd@172.16.6.161/datetime: qos=0
2017-12-07 11:26:54
message recevied from $SYS/brokers/emqttd@172.16.6.161/uptime: qos=0
3 minutes, 23 seconds
message recevied from $SYS/brokers/emqttd@172.16.6.161/datetime: qos=0
2017-12-07 11:26:55
message recevied from $SYS/brokers/emqttd@172.16.6.161/uptime: qos=0
3 minutes, 24 seconds
message recevied from $SYS/brokers/emqttd@172.16.6.161/datetime: qos=0
2017-12-07 11:26:56
unsubscribed $SYS/#

3、订阅客户端上下线的主题,源码参见-module(emqttd_mod_presence).


源码提及的具体某个节点的某个clientId方式的主题是：


$SYS/brokers/ (node)/clients/ (clientId)/connected

$SYS/brokers/emqttd@172.16.6.161/clients/861694030142478/connected

$SYS/brokers/emqttd@172.16.6.161/clients/861694030142478/disconnected

本人整理之后，通配方式的主题是：

$SYS/brokers/+/clients/+/connected

$SYS/brokers/+/clients/+/disconnected

$SYS/brokers/+/clients/#

实测订阅客户端上下线消息如下：

connected to 172.16.6.161:1883
subscribed $SYS/brokers/+/clients/#
message recevied from $SYS/brokers/emqttd@172.16.6.161/clients/861694030142478/connected: qos=0
{"clientid":"861694030142478","username":"invtGTerm","ipaddress":"172.16.6.155","session":false,"protocol":3,"connack":0,"ts":1512629239}
message recevied from $SYS/brokers/emqttd@172.16.6.161/clients/861694030142478/disconnected: qos=0
{"clientid":"861694030142478","reason":"normal","ts":1512629242}

所以，出于安全起见，我们把acl.config文件修改为：

允许客户端订阅"$SYS/brokers/+/clients/#"主题,但是禁止订阅"$SYS/#"主题。

{allow, {user, "dashboard"}, subscribe, ["$SYS/#"]}.
{allow, {ipaddr, "127.0.0.1"}, pubsub, ["$SYS/#", "#"]}.
{allow, all, subscribe, ["$SYS/brokers/+/clients/#"]}.
{deny, all, subscribe, ["$SYS/#", {eq, "#"}]}.
{allow, all}.


文章标签：
云消息队列 MQ
安全
关键词：
云消息队列 MQ协议
云消息队列 MQ客户端
云消息队列 MQ订阅
云消息队列 MQ订阅客户端
云消息队列 MQ协议emqttd开源项目客户端
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消息队列RocketMQ版：基础消息收发功能体验
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