├── .gitignore ├── LICENSE ├── Makefile ├── README.md ├── emqx_kafka_bridge.d ├── emqx_kafka_bridge.iml ├── erlang.mk ├── etc └── emqx_kafka_bridge.conf ├── include └── emqx_kafka_bridge.hrl ├── priv └── emqx_kafka_bridge.schema ├── rebar.config ├── rebar.lock ├── src ├── emqx_kafka_bridge.erl ├── emqx_kafka_bridge_app.erl └── emqx_kafka_bridge_sup.erl └── test └── emqx_kafka_bridge_SUITE.erl /.gitignore: -------------------------------------------------------------------------------- 1 | .eunit 2 | deps 3 | *.o 4 | *.beam 5 | *.plt 6 | erl_crash.dump 7 | ebin 8 | rel/example_project 9 | .concrete/DEV_MODE 10 | .rebar 11 | .erlang.mk/ 12 | emq_plugin_template.d 13 | /.idea 14 | /_build 15 | -------------------------------------------------------------------------------- /LICENSE: -------------------------------------------------------------------------------- 1 | Apache License 2 | Version 2.0, January 2004 3 | http://www.apache.org/licenses/ 4 | 5 | TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION 6 | 7 | 1. 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We also recommend that a 185 | file or class name and description of purpose be included on the 186 | same "printed page" as the copyright notice for easier 187 | identification within third-party archives. 188 | 189 | Copyright {yyyy} {name of copyright owner} 190 | 191 | Licensed under the Apache License, Version 2.0 (the "License"); 192 | you may not use this file except in compliance with the License. 193 | You may obtain a copy of the License at 194 | 195 | http://www.apache.org/licenses/LICENSE-2.0 196 | 197 | Unless required by applicable law or agreed to in writing, software 198 | distributed under the License is distributed on an "AS IS" BASIS, 199 | WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 200 | See the License for the specific language governing permissions and 201 | limitations under the License. 202 | -------------------------------------------------------------------------------- /Makefile: -------------------------------------------------------------------------------- 1 | PROJECT = emqx_kafka_bridge 2 | PROJECT_DESCRIPTION = EMQ X Kafka Bridge 3 | PROJECT_VERSION = 3.0 4 | 5 | DEPS = ekaf 6 | dep_ekaf = git https://github.com/helpshift/ekaf master 7 | 8 | 9 | BUILD_DEPS = emqx cuttlefish 10 | dep_emqx = git https://github.com/emqx/emqx emqx30 11 | dep_cuttlefish = git https://github.com/emqx/cuttlefish emqx30 12 | 13 | COVER = true 14 | 15 | ERLC_OPTS += +debug_info 16 | ERLC_OPTS += +warnings_as_errors +warn_export_all +warn_unused_import 17 | TEST_ERLC_OPTS += +debug_info 18 | 19 | NO_AUTOPATCH = cuttlefish 20 | 21 | include erlang.mk 22 | 23 | app:: rebar.config 24 | 25 | app.config:: 26 | ./deps/cuttlefish/cuttlefish -l info -e etc/ -c etc/emqx_kafka_bridge.conf -i priv/emqx_kafka_bridge.schema -d data 27 | 28 | -------------------------------------------------------------------------------- /README.md: -------------------------------------------------------------------------------- 1 | 2 | # emqx_kafka_bridge 3 | 4 | This is a plugin for the EMQX broker that sends all messages received by the broker to kafka. 5 | 6 | 注意：插件目前适配的是emqx 3.0，不适配3.1,3.2这些版本了 7 | 8 | ## Build the EMQX broker 9 | 10 | 1. Clone emqx-relx project 11 | 12 | We need to clone the EMQX project [GITHUB](https://github.com/emqx/emqx-rel) 13 | 14 | ```shell 15 | git clone https://github.com/emqx/emqx-rel.git 16 | ``` 17 | 18 | 2. Add EMQ Kafka bridge as a DEPS 19 | Adding EMQ kafka bridge as a dependency in the Makefile. 20 | 21 | 1. search for `DEPS += $(foreach dep,$(OUR_APPS),$(call app_name,$(dep)))` 22 | add the following line before the above lines 23 | > DEPS += emqx_kafka_bridge 24 | 25 | 2. search for 26 | ``` 27 | $(foreach dep,$(OUR_APPS),$(eval dep_$(call app_name,$(dep)) = git-emqx https://github.com/emqx/$(dep) $(call app_vsn,$(dep)))) 28 | ``` 29 | add the following line before the above lines 30 | >dep_emqx_kafka_bridge = git https://github.com/bob403/emqx_kafka_bridge.git master 31 | 32 | 3. Add load plugin in relx.config 33 | >{emqx_kafka_bridge, load}, 34 | 35 | 4. Build 36 | ```shell 37 | cd emqx-relx && make 38 | ``` 39 | 40 | Configuration 41 | ---------------------- 42 | You will have to edit the configurations of the bridge to set the kafka Ip address and port. 43 | 44 | Edit the file emq-relx/deps/emqx_kafka_bridge/etc/emqx_kafka_bridge.conf 45 | 46 | ```conf 47 | ##-------------------------------------------------------------------- 48 | ## kafka Bridge 49 | ##-------------------------------------------------------------------- 50 | 51 | ## The Kafka loadbalancer node host that bridge is listening on. 52 | ## 53 | ## Value: 127.0.0.1, localhost 54 | kafka.host = 127.0.0.1 55 | 56 | ## The kafka loadbalancer node port that bridge is listening on. 57 | ## 58 | ## Value: Port 59 | kafka.port = 9092 60 | 61 | ## The kafka loadbalancer node partition strategy. 62 | ## 63 | ## Value: strict_round_robin 64 | kafka.partitionstrategy = strict_round_robin 65 | 66 | ## payload topic. 67 | ## 68 | ## Value: string 69 | kafka.payloadtopic = Processing 70 | 71 | 72 | ``` 73 | 74 | Start the EMQ broker and load the plugin 75 | ----------------- 76 | 1) cd emqx-relx/_rel/emqx 77 | 2) ./bin/emqx start 78 | 3) ./bin/emqx_ctl plugins load emqx_kafka_bridge 79 | 80 | Test 81 | ----------------- 82 | Send a MQTT message on a random topic from a MQTT client to your EMQ broker. 83 | 84 | The following should be received by your kafka consumer : 85 | 86 | {"topic":"yourtopic", "message":[yourmessage]} 87 | This is the format in which kafka will receive the MQTT messages 88 | 89 | If Kafka consumer shows no messages even after publishing to EMQX - ACL makes the plugin fail, so please remove all the ACL related code to ensure it runs properly. We will soon push the updated (Working) code to the repository. 90 | 91 | ## License 92 | 93 | This project is licensed under the Apache 2.0 License - see the [LICENSE](LICENSE) file for details 94 | 95 | -------------------------------------------------------------------------------- /emqx_kafka_bridge.d: -------------------------------------------------------------------------------- 1 | COMPILE_FIRST += 2 | -------------------------------------------------------------------------------- /emqx_kafka_bridge.iml: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | -------------------------------------------------------------------------------- /erlang.mk: -------------------------------------------------------------------------------- 1 | include ../../erlang.mk 2 | 3 | -------------------------------------------------------------------------------- /etc/emqx_kafka_bridge.conf: -------------------------------------------------------------------------------- 1 | ##-------------------------------------------------------------------- 2 | ## kafka Bridge 3 | ##-------------------------------------------------------------------- 4 | 5 | ## The Kafka loadbalancer node host that bridge is listening on. 6 | ## 7 | ## Value: 127.0.0.1, localhost 8 | kafka.host = 192.168.205.116 9 | 10 | ## The kafka loadbalancer node port that bridge is listening on. 11 | ## 12 | ## Value: Port 13 | kafka.port = 9092 14 | 15 | ## The kafka loadbalancer node partition strategy. 16 | ## 17 | ## Value: random, sticky_round_robin, strict_round_robin, custom 18 | kafka.partitionstrategy = strict_round_robin 19 | 20 | ## Each worker represents a connection to a broker + topic + partition combination. 21 | ## You can decide how many workers to start for each partition. 22 | ## 23 | ## Value: 24 | kafka.partitionworkers = 8 25 | 26 | ## payload topic. 27 | ## 28 | ## Value: string 29 | kafka.payloadtopic = Processing 30 | -------------------------------------------------------------------------------- /include/emqx_kafka_bridge.hrl: -------------------------------------------------------------------------------- 1 | -define(APP, emqx_kafka_bridge). 2 | 3 | -------------------------------------------------------------------------------- /priv/emqx_kafka_bridge.schema: -------------------------------------------------------------------------------- 1 | %%-*- mode: erlang -*- 2 | 3 | {mapping, "kafka.host", "emqx_kafka_bridge.broker", [ 4 | {default, "192.168.205.116"}, 5 | {datatype, string} 6 | ]}. 7 | 8 | {mapping, "kafka.port", "emqx_kafka_bridge.broker", [ 9 | {default, "9092"}, 10 | {datatype, string} 11 | ]}. 12 | 13 | {mapping, "kafka.partitionstrategy", "emqx_kafka_bridge.broker", [ 14 | {default, "strict_round_robin"}, 15 | {datatype, string} 16 | ]}. 17 | 18 | {mapping, "kafka.partitionworkers", "emqx_kafka_bridge.broker", [ 19 | {default, 8}, 20 | {datatype, integer} 21 | ]}. 22 | 23 | {mapping, "kafka.payloadtopic", "emqx_kafka_bridge.broker", [ 24 | {default, "Processing"}, 25 | {datatype, string} 26 | ]}. 27 | 28 | {translation, "emqx_kafka_bridge.broker", fun(Conf) -> 29 | KafkaHost = cuttlefish:conf_get("kafka.host", Conf), 30 | KafkaPort = cuttlefish:conf_get("kafka.port", Conf), 31 | KafkaPartitionStrategy = cuttlefish:conf_get("kafka.partitionstrategy", Conf), 32 | KafkaPartitionWorkers = cuttlefish:conf_get("kafka.partitionworkers", Conf), 33 | KafkaPayloadTopic = cuttlefish:conf_get("kafka.payloadtopic", Conf), 34 | [{host, KafkaHost}, {port, KafkaPort}, {partitionstrategy, KafkaPartitionStrategy}, {partitionworkers, KafkaPartitionWorkers}, {payloadtopic, KafkaPayloadTopic}] 35 | end}. -------------------------------------------------------------------------------- /rebar.config: -------------------------------------------------------------------------------- 1 | {deps, [ 2 | {ekaf,".*",{git,"https://github.com/helpshift/ekaf","master"}} 3 | ]}. 4 | {erl_opts, [debug_info,warn_export_vars,warn_shadow_vars,warn_obsolete_guard,warnings_as_errors,warn_export_all,warn_unused_import]}. 5 | 6 | -------------------------------------------------------------------------------- /rebar.lock: -------------------------------------------------------------------------------- 1 | [{<<"ekaf">>, 2 | {git,"https://github.com/helpshift/ekaf", 3 | {ref,"8967b8a0cf650c80656d48fcdcd1e1b3c8d8d6a7"}}, 4 | 0}, 5 | {<<"gproc">>, 6 | {git,"https://github.com/uwiger/gproc.git", 7 | {ref,"ce7397809aca0d6eb3aac6db65953752e47fb511"}}, 8 | 1}, 9 | {<<"kafkamocker">>, 10 | {git,"https://github.com/helpshift/kafkamocker", 11 | {ref,"b3fdeb58a1eca1c864a45f35a4e5632e74f43a24"}}, 12 | 1}, 13 | {<<"ranch">>, 14 | {git,"https://github.com/extend/ranch.git", 15 | {ref,"cbe24f6fb9833474b22a06fc22cb1a8f168f7fbc"}}, 16 | 2}]. 17 | -------------------------------------------------------------------------------- /src/emqx_kafka_bridge.erl: -------------------------------------------------------------------------------- 1 | %%-------------------------------------------------------------------- 2 | %% Copyright (c) 2015-2017 Feng Lee . 3 | %% 4 | %% Modified by Ramez Hanna 5 | %% 6 | %% Licensed under the Apache License, Version 2.0 (the "License"); 7 | %% you may not use this file except in compliance with the License. 8 | %% You may obtain a copy of the License at 9 | %% 10 | %% http://www.apache.org/licenses/LICENSE-2.0 11 | %% 12 | %% Unless required by applicable law or agreed to in writing, software 13 | %% distributed under the License is distributed on an "AS IS" BASIS, 14 | %% WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 15 | %% See the License for the specific language governing permissions and 16 | %% limitations under the License. 17 | %%-------------------------------------------------------------------- 18 | 19 | -module(emqx_kafka_bridge). 20 | 21 | -include("emqx_kafka_bridge.hrl"). 22 | 23 | -include_lib("emqx/include/emqx.hrl"). 24 | 25 | -export([load/1, unload/0]). 26 | 27 | %% Hooks functions 28 | 29 | -export([on_client_connected/4, on_client_disconnected/3]). 30 | 31 | % -export([on_client_subscribe/4, on_client_unsubscribe/4]). 32 | 33 | % -export([on_session_created/3, on_session_subscribed/4, on_session_unsubscribed/4, on_session_terminated/4]). 34 | 35 | -export([on_message_publish/2, on_message_delivered/3, on_message_acked/3]). 36 | 37 | 38 | %% Called when the plugin application start 39 | load(Env) -> 40 | ekaf_init([Env]), 41 | emqx:hook('client.connected', fun ?MODULE:on_client_connected/4, [Env]), 42 | emqx:hook('client.disconnected', fun ?MODULE:on_client_disconnected/3, [Env]), 43 | emqx:hook('message.publish', fun ?MODULE:on_message_publish/2, [Env]), 44 | emqx:hook('message.delivered', fun ?MODULE:on_message_delivered/3, [Env]), 45 | emqx:hook('message.acked', fun ?MODULE:on_message_acked/3, [Env]). 46 | 47 | on_client_connected(#{client_id := ClientId, username := Username}, _ConnAck, _ConnAttrs, _Env) -> 48 | % io:format("client ~s connected, connack: ~w~n", [ClientId, ConnAck]), 49 | % produce_kafka_payload(<<"event">>, Client), 50 | 51 | Action = <<"connected">>, 52 | Now = erlang:timestamp(), 53 | Payload = [{action, Action}, {device_id, ClientId}, {username, Username}, {ts, emqx_time:now_secs(Now)}], 54 | %{ok, Event} = format_event(Payload), 55 | produce_kafka_payload(Payload), 56 | ok. 57 | 58 | on_client_disconnected(#{client_id := ClientId, username := Username}, _Reason, _Env) -> 59 | % io:format("client ~s disconnected, reason: ~w~n", [ClientId, Reason]), 60 | % produce_kafka_payload(<<"event">>, _Client), 61 | 62 | Action = <<"disconnected">>, 63 | Now = erlang:timestamp(), 64 | Payload = [{action, Action}, {device_id, ClientId}, {username, Username}, {ts, emqx_time:now_secs(Now)}], 65 | %{ok, Event} = format_event(Payload), 66 | produce_kafka_payload(Payload), 67 | ok. 68 | 69 | %% transform message and return 70 | on_message_publish(Message = #message{topic = <<"$SYS/", _/binary>>}, _Env) -> 71 | {ok, Message}; 72 | 73 | on_message_publish(Message, _Env) -> 74 | % io:format("Publish message ~s~n", [emqx_message:format(Message)]), 75 | {ok, Payload} = format_payload(Message), 76 | produce_kafka_payload(Payload), 77 | {ok, Message}. 78 | 79 | on_message_delivered(#{}, Message, _Env) -> 80 | % io:format("delivered to client(~s/~s): ~s~n", [Username, ClientId, emqttd_message:format(Message)]), 81 | {ok, Message}. 82 | 83 | on_message_acked(#{}, Message, _Env) -> 84 | % io:format("client(~s/~s) acked: ~s~n", [Username, ClientId, emqttd_message:format(Message)]), 85 | {ok, Message}. 86 | 87 | ekaf_init(_Env) -> 88 | {ok, BrokerValues} = application:get_env(emqx_kafka_bridge, broker), 89 | KafkaHost = proplists:get_value(host, BrokerValues), 90 | KafkaPort = proplists:get_value(port, BrokerValues), 91 | KafkaPartitionStrategy = proplists:get_value(partitionstrategy, BrokerValues), 92 | KafkaPartitionWorkers = proplists:get_value(partitionworkers, BrokerValues), 93 | KafkaTopic = proplists:get_value(payloadtopic, BrokerValues), 94 | application:set_env(ekaf, ekaf_bootstrap_broker, {KafkaHost, list_to_integer(KafkaPort)}), 95 | application:set_env(ekaf, ekaf_partition_strategy, list_to_atom(KafkaPartitionStrategy)), 96 | application:set_env(ekaf, ekaf_per_partition_workers, KafkaPartitionWorkers), 97 | application:set_env(ekaf, ekaf_bootstrap_topics, list_to_binary(KafkaTopic)), 98 | application:set_env(ekaf, ekaf_buffer_ttl, 10), 99 | application:set_env(ekaf, ekaf_max_downtime_buffer_size, 5), 100 | % {ok, _} = application:ensure_all_started(kafkamocker), 101 | {ok, _} = application:ensure_all_started(gproc), 102 | % {ok, _} = application:ensure_all_started(ranch), 103 | {ok, _} = application:ensure_all_started(ekaf). 104 | 105 | ekaf_get_topic() -> 106 | {ok, Topic} = application:get_env(ekaf, ekaf_bootstrap_topics), 107 | Topic. 108 | 109 | 110 | format_payload(Message) -> 111 | Username = emqx_message:get_header(username, Message), 112 | 113 | Topic = Message#message.topic, 114 | Tail = string:right(binary_to_list(Topic), 4), 115 | RawType = string:equal(Tail, <<"_raw">>), 116 | % io:format("Tail= ~s , RawType= ~s~n",[Tail,RawType]), 117 | 118 | MsgPayload = Message#message.payload, 119 | % io:format("MsgPayload : ~s~n", [MsgPayload]), 120 | 121 | if 122 | RawType == true -> 123 | MsgPayload64 = list_to_binary(base64:encode_to_string(MsgPayload)); 124 | % io:format("MsgPayload64 : ~s~n", [MsgPayload64]); 125 | RawType == false -> 126 | MsgPayload64 = MsgPayload 127 | end, 128 | 129 | 130 | Payload = [{action, message_publish}, 131 | {device_id, Message#message.from}, 132 | {username, Username}, 133 | {topic, Topic}, 134 | {payload, MsgPayload64}, 135 | {ts, emqx_time:now_secs(Message#message.timestamp)}], 136 | 137 | {ok, Payload}. 138 | 139 | 140 | %% Called when the plugin application stop 141 | unload() -> 142 | emqx:unhook('client.connected', fun ?MODULE:on_client_connected/4), 143 | emqx:unhook('client.disconnected', fun ?MODULE:on_client_disconnected/3), 144 | % emqx:unhook('client.subscribe', fun ?MODULE:on_client_subscribe/4), 145 | % emqx:unhook('client.unsubscribe', fun ?MODULE:on_client_unsubscribe/4), 146 | % emqx:unhook('session.subscribed', fun ?MODULE:on_session_subscribed/4), 147 | % emqx:unhook('session.unsubscribed', fun ?MODULE:on_session_unsubscribed/4), 148 | emqx:unhook('message.publish', fun ?MODULE:on_message_publish/2), 149 | emqx:unhook('message.delivered', fun ?MODULE:on_message_delivered/3), 150 | emqx:unhook('message.acked', fun ?MODULE:on_message_acked/3). 151 | 152 | produce_kafka_payload(Message) -> 153 | Topic = ekaf_get_topic(), 154 | {ok, MessageBody} = emqx_json:safe_encode(Message), 155 | 156 | % MessageBody64 = base64:encode_to_string(MessageBody), 157 | Payload = iolist_to_binary(MessageBody), 158 | ekaf:produce_async_batched(Topic, Payload). 159 | 160 | -------------------------------------------------------------------------------- /src/emqx_kafka_bridge_app.erl: -------------------------------------------------------------------------------- 1 | %%-------------------------------------------------------------------- 2 | %% Copyright (c) 2015-2017 Feng Lee . 3 | %% 4 | %% Licensed under the Apache License, Version 2.0 (the "License"); 5 | %% you may not use this file except in compliance with the License. 6 | %% You may obtain a copy of the License at 7 | %% 8 | %% http://www.apache.org/licenses/LICENSE-2.0 9 | %% 10 | %% Unless required by applicable law or agreed to in writing, software 11 | %% distributed under the License is distributed on an "AS IS" BASIS, 12 | %% WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 | %% See the License for the specific language governing permissions and 14 | %% limitations under the License. 15 | %%-------------------------------------------------------------------- 16 | 17 | -module(emqx_kafka_bridge_app). 18 | 19 | -behaviour(application). 20 | 21 | %% Application callbacks 22 | -export([start/2, stop/1]). 23 | 24 | start(_StartType, _StartArgs) -> 25 | {ok, Sup} = emqx_kafka_bridge_sup:start_link(), 26 | emqx_kafka_bridge:load(application:get_all_env()), 27 | {ok, Sup}. 28 | 29 | stop(_State) -> 30 | emqx_kafka_bridge:unload(). 31 | 32 | -------------------------------------------------------------------------------- /src/emqx_kafka_bridge_sup.erl: -------------------------------------------------------------------------------- 1 | %%-------------------------------------------------------------------- 2 | %% Copyright (c) 2015-2017 Feng Lee . 3 | %% 4 | %% Licensed under the Apache License, Version 2.0 (the "License"); 5 | %% you may not use this file except in compliance with the License. 6 | %% You may obtain a copy of the License at 7 | %% 8 | %% http://www.apache.org/licenses/LICENSE-2.0 9 | %% 10 | %% Unless required by applicable law or agreed to in writing, software 11 | %% distributed under the License is distributed on an "AS IS" BASIS, 12 | %% WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 | %% See the License for the specific language governing permissions and 14 | %% limitations under the License. 15 | %%-------------------------------------------------------------------- 16 | 17 | -module(emqx_kafka_bridge_sup). 18 | 19 | -behaviour(supervisor). 20 | 21 | %% API 22 | -export([start_link/0]). 23 | 24 | %% Supervisor callbacks 25 | -export([init/1]). 26 | 27 | start_link() -> 28 | supervisor:start_link({local, ?MODULE}, ?MODULE, []). 29 | 30 | init([]) -> 31 | {ok, { {one_for_one, 10, 100}, []} }. 32 | -------------------------------------------------------------------------------- /test/emqx_kafka_bridge_SUITE.erl: -------------------------------------------------------------------------------- 1 | -module(emqx_kafka_bridge_SUITE). 2 | 3 | -compile(export_all). 4 | 5 | all() -> []. 6 | 7 | groups() -> []. 8 | --------------------------------------------------------------------------------