├── .gitignore ├── LICENSE ├── Makefile ├── README.md ├── erlang.mk ├── etc └── emqttd_kafka_bridge.config ├── rebar.config ├── src ├── emq_acl_emqttd_kafka_bridge.erl ├── emq_auth_emqttd_kafka_bridge.erl ├── emq_cli_emqttd_kafka_bridge.erl ├── emqttd_kafka_bridge.erl ├── emqttd_kafka_bridge_app.erl └── emqttd_kafka_bridge_sup.erl └── test └── emqttd_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 | emqttd_plugin_template.d -------------------------------------------------------------------------------- /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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The text should be enclosed in the appropriate 184 | comment syntax for the file format. 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 = emqttd_kafka_bridge 2 | PROJECT_DESCRIPTION = EMQTTD Kafka Bridge 3 | PROJECT_VERSION = 2.0.7 4 | 5 | DEPS = ekaf 6 | dep_ekaf = git https://github.com/helpshift/ekaf master 7 | 8 | 9 | BUILD_DEPS = emqttd cuttlefish 10 | dep_emqttd = git https://github.com/emqtt/emqttd master 11 | dep_cuttlefish = git https://github.com/emqtt/cuttlefish 12 | 13 | COVER = true 14 | 15 | include erlang.mk 16 | 17 | app:: rebar.config 18 | 19 | app.config:: 20 | ./deps/cuttlefish/cuttlefish -l info -e etc/ -c etc/emqttd_kafka_bridge.conf -i priv/emqttd_kafka_bridge.schema -d data 21 | -------------------------------------------------------------------------------- /README.md: -------------------------------------------------------------------------------- 1 | 2 | emqttd_kafka_plugin 3 | =================== 4 | 5 | This is a plugin for the EMQ broker that sends all messages received by the broker to kafka. 6 | 7 | Build the EMQ broker 8 | ------------- 9 | 10 | 1. clone emq-relx project 11 | ``` 12 | git clone https://github.com/emqtt/emq-relx.git 13 | ``` 14 | 2. Add DEPS of the plugin in the Makefile 15 | ``` 16 | DEPS += emqttd_kafka_bridge 17 | dep_emqttd_kafka_bridge = git https://github.com/shsjdcbg/emq-kafka.git master 18 | ``` 19 | 3. Add load plugin in relx.config 20 | ``` 21 | {emqttd_kafka_bridge, load}, 22 | ``` 23 | 4. Build 24 | ``` 25 | cd emq-relx && make 26 | ``` 27 | Configuration 28 | ---------------------- 29 | You will have to edit the configurations of the bridge to set the kafka Ip address and port. 30 | 31 | Edit the file emq-relx/deps/emqttd_kafka_bridge/etc/emqttd_kafka_bridge.config 32 | ``` 33 | [ 34 | {emqttd_kafka_bridge, [{values, [ 35 | %%edit this to address and port on which kafka is running 36 | {bootstrap_broker, {"172.31.29.115", 9092} }, 37 | %% partition strategies can be strict_round_robin or random 38 | {partition_strategy, strict_round_robin}, 39 | %% Change the topic to produce to kafka. Default topic is "Kafka". It is on this topic that the messages will be sent from the broker to a kafka consumer 40 | {kafka_producer_topic, <<"kafka">>} 41 | ]}]} 42 | ]. 43 | ``` 44 | 45 | Start the EMQ broker and load the plugin 46 | ----------------- 47 | 1) cd emq-relx/_rel/emqttd 48 | 2) ./bin/emqttd start 49 | 3) ./bin/emqttd_ctl plugins load emqttd_kafka_bridge 50 | 51 | Test 52 | ----------------- 53 | Send an MQTT message on a random topic from an MQTT client to you EMQ broker. 54 | 55 | The following should be received by your kafka consumer : 56 | 57 | {"topic":"yourtopic", "message":[yourmessage]} 58 | This is the format in which kafka will receive the MQTT messages 59 | 60 | 61 | If Kafka consumer shows no messages even after publishing to EMQTT - 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. 62 | 63 | License 64 | ------- 65 | 66 | Apache License Version 2.0 67 | 68 | 69 | 70 | -------------------------------------------------------------------------------- /erlang.mk: -------------------------------------------------------------------------------- 1 | include ../../erlang.mk 2 | -------------------------------------------------------------------------------- /etc/emqttd_kafka_bridge.config: -------------------------------------------------------------------------------- 1 | 2 | [ 3 | {emqttd_kafka_bridge, [{values, [ 4 | {bootstrap_broker, {"172.31.29.115", 9092} }, 5 | {partition_strategy, strict_round_robin}, 6 | {kafka_producer_topic, <<"kafka">>} 7 | ]}]} 8 | ]. 9 | 10 | -------------------------------------------------------------------------------- /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]}. 5 | -------------------------------------------------------------------------------- /src/emq_acl_emqttd_kafka_bridge.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(emq_acl_emqttd_kafka_bridge). 18 | 19 | -include_lib("emqttd/include/emqttd.hrl"). 20 | 21 | %% ACL callbacks 22 | -export([init/1, check_acl/2, reload_acl/1, description/0]). 23 | 24 | init(Opts) -> 25 | {ok, Opts}. 26 | 27 | check_acl({Client, PubSub, Topic}, _Opts) -> 28 | io:format("ACL Demo: ~p ~p ~p~n", [Client, PubSub, Topic]), 29 | ignore. 30 | 31 | reload_acl(_Opts) -> 32 | ignore. 33 | 34 | description() -> "ACL Demo Module". 35 | 36 | -------------------------------------------------------------------------------- /src/emq_auth_emqttd_kafka_bridge.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(emq_auth_emqttd_kafka_bridge). 18 | 19 | -behaviour(emqttd_auth_mod). 20 | 21 | -include_lib("emqttd/include/emqttd.hrl"). 22 | 23 | -export([init/1, check/3, description/0]). 24 | 25 | init(Opts) -> {ok, Opts}. 26 | 27 | check(#mqtt_client{client_id = ClientId, username = Username}, Password, _Opts) -> 28 | io:format("Auth Demo: clientId=~p, username=~p, password=~p~n", 29 | [ClientId, Username, Password]), 30 | ignore. 31 | 32 | description() -> "Auth Demo Module". 33 | 34 | -------------------------------------------------------------------------------- /src/emq_cli_emqttd_kafka_bridge.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(emq_cli_emqttd_kafka_bridge). 18 | 19 | -include_lib("emqttd/include/emqttd_cli.hrl"). 20 | 21 | -export([cmd/1]). 22 | 23 | cmd(["arg1", "arg2"]) -> 24 | ?PRINT_MSG("ok"); 25 | 26 | cmd(_) -> 27 | ?USAGE([{"cmd arg1 arg2", "cmd demo"}]). 28 | 29 | -------------------------------------------------------------------------------- /src/emqttd_kafka_bridge.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(emqttd_kafka_bridge). 18 | 19 | -include_lib("emqttd/include/emqttd.hrl"). 20 | 21 | -include_lib("emqttd/include/emqttd_protocol.hrl"). 22 | 23 | -include_lib("emqttd/include/emqttd_internal.hrl"). 24 | -import(string,[concat/2]). 25 | -import(lists,[nth/2]). 26 | 27 | 28 | -export([load/1, unload/0]). 29 | 30 | %% Hooks functions 31 | 32 | -export([on_client_connected/3, on_client_disconnected/3]). 33 | 34 | -export([on_client_subscribe/4, on_client_unsubscribe/4]). 35 | 36 | -export([on_session_created/3, on_session_subscribed/4, on_session_unsubscribed/4, on_session_terminated/4]). 37 | 38 | -export([on_message_publish/2, on_message_delivered/4, on_message_acked/4]). 39 | 40 | %% Called when the plugin application start 41 | load(Env) -> 42 | ekaf_init([Env]), 43 | emqttd:hook('client.connected', fun ?MODULE:on_client_connected/3, [Env]), 44 | emqttd:hook('client.disconnected', fun ?MODULE:on_client_disconnected/3, [Env]), 45 | emqttd:hook('client.subscribe', fun ?MODULE:on_client_subscribe/4, [Env]), 46 | emqttd:hook('client.unsubscribe', fun ?MODULE:on_client_unsubscribe/4, [Env]), 47 | emqttd:hook('session.created', fun ?MODULE:on_session_created/3, [Env]), 48 | emqttd:hook('session.subscribed', fun ?MODULE:on_session_subscribed/4, [Env]), 49 | emqttd:hook('session.unsubscribed', fun ?MODULE:on_session_unsubscribed/4, [Env]), 50 | emqttd:hook('session.terminated', fun ?MODULE:on_session_terminated/4, [Env]), 51 | emqttd:hook('message.publish', fun ?MODULE:on_message_publish/2, [Env]), 52 | emqttd:hook('message.delivered', fun ?MODULE:on_message_delivered/4, [Env]), 53 | emqttd:hook('message.acked', fun ?MODULE:on_message_acked/4, [Env]). 54 | 55 | on_client_connected(ConnAck, Client = #mqtt_client{client_id = ClientId}, _Env) -> 56 | io:format("client ~s connected, connack: ~w~n", [ClientId, ConnAck]), 57 | {ok, Client}. 58 | 59 | on_client_disconnected(Reason, _Client = #mqtt_client{client_id = ClientId}, _Env) -> 60 | io:format("client ~s disconnected, reason: ~w~n", [ClientId, Reason]), 61 | ok. 62 | 63 | on_client_subscribe(ClientId, Username, TopicTable, _Env) -> 64 | io:format("client(~s/~s) will subscribe: ~p~n", [Username, ClientId, TopicTable]), 65 | {ok, TopicTable}. 66 | 67 | on_client_unsubscribe(ClientId, Username, TopicTable, _Env) -> 68 | io:format("client(~s/~s) unsubscribe ~p~n", [ClientId, Username, TopicTable]), 69 | {ok, TopicTable}. 70 | 71 | on_session_created(ClientId, Username, _Env) -> 72 | io:format("session(~s/~s) created.", [ClientId, Username]). 73 | 74 | on_session_subscribed(ClientId, Username, {Topic, Opts}, _Env) -> 75 | io:format("session(~s/~s) subscribed: ~p~n", [Username, ClientId, {Topic, Opts}]), 76 | {ok, {Topic, Opts}}. 77 | 78 | on_session_unsubscribed(ClientId, Username, {Topic, Opts}, _Env) -> 79 | io:format("session(~s/~s) unsubscribed: ~p~n", [Username, ClientId, {Topic, Opts}]), 80 | ok. 81 | 82 | on_session_terminated(ClientId, Username, Reason, _Env) -> 83 | io:format("session(~s/~s) terminated: ~p.", [ClientId, Username, Reason]). 84 | 85 | %% transform message and return 86 | on_message_publish(Message = #mqtt_message{topic = <<"$SYS/", _/binary>>}, _Env) -> 87 | {ok, Message}; 88 | 89 | on_message_publish(Message = #mqtt_message{pktid = PkgId, 90 | qos = Qos, 91 | retain = Retain, 92 | dup = Dup, 93 | topic = Topic, 94 | payload = Payload 95 | }, _Env) -> 96 | io:format("publish ~s~n", [emqttd_message:format(Message)]), 97 | Str1 = <<"{\"topic\":\"">>, 98 | Str2 = <<"\", \"message\":[">>, 99 | Str3 = <<"]}">>, 100 | Str4 = <>, 101 | {ok, KafkaTopic} = application:get_env(emqttd_kafka_bridge, values), 102 | ProduceTopic = proplists:get_value(kafka_producer_topic, KafkaTopic), 103 | ekaf:produce_async(ProduceTopic, Str4), 104 | {ok, Message}. 105 | 106 | 107 | on_message_delivered(ClientId, Username, Message, _Env) -> 108 | io:format("delivered to client(~s/~s): ~s~n", [Username, ClientId, emqttd_message:format(Message)]), 109 | {ok, Message}. 110 | 111 | on_message_acked(ClientId, Username, Message, _Env) -> 112 | io:format("client(~s/~s) acked: ~s~n", [Username, ClientId, emqttd_message:format(Message)]), 113 | {ok, Message}. 114 | 115 | ekaf_init(_Env) -> 116 | {ok, Values} = application:get_env(emqttd_kafka_bridge, values), 117 | BootstrapBroker = proplists:get_value(bootstrap_broker, Values), 118 | PartitionStrategy= proplists:get_value(partition_strategy, Values), 119 | application:set_env(ekaf, ekaf_partition_strategy, PartitionStrategy), 120 | application:set_env(ekaf, ekaf_bootstrap_broker, BootstrapBroker), 121 | {ok, _} = application:ensure_all_started(ekaf), 122 | io:format("Initialized ekaf with ~p~n", [{"localhost", 9092}]). 123 | 124 | %% Called when the plugin application stop 125 | unload() -> 126 | emqttd:unhook('client.connected', fun ?MODULE:on_client_connected/3), 127 | emqttd:unhook('client.disconnected', fun ?MODULE:on_client_disconnected/3), 128 | emqttd:unhook('client.subscribe', fun ?MODULE:on_client_subscribe/4), 129 | emqttd:unhook('client.unsubscribe', fun ?MODULE:on_client_unsubscribe/4), 130 | emqttd:unhook('session.subscribed', fun ?MODULE:on_session_subscribed/4), 131 | emqttd:unhook('session.unsubscribed', fun ?MODULE:on_session_unsubscribed/4), 132 | emqttd:unhook('message.publish', fun ?MODULE:on_message_publish/2), 133 | emqttd:unhook('message.delivered', fun ?MODULE:on_message_delivered/4), 134 | emqttd:unhook('message.acked', fun ?MODULE:on_message_acked/4). 135 | 136 | -------------------------------------------------------------------------------- /src/emqttd_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(emqttd_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} = emqttd_kafka_bridge_sup:start_link(), 26 | ok = emqttd_access_control:register_mod(auth, emq_auth_emqttd_kafka_bridge, []), 27 | ok = emqttd_access_control:register_mod(acl, emq_acl_emqttd_kafka_bridge, []), 28 | emqttd_kafka_bridge:load(application:get_all_env()), 29 | {ok, Sup}. 30 | 31 | stop(_State) -> 32 | ok = emqttd_access_control:unregister_mod(auth, emq_auth_emqttd_kafka_bridge), 33 | ok = emqttd_access_control:unregister_mod(acl, emq_acl_emqttd_kafka_bridge), 34 | emqttd_kafka_bridge:unload(). 35 | -------------------------------------------------------------------------------- /src/emqttd_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(emqttd_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, 5, 10}, []} }. 32 | 33 | -------------------------------------------------------------------------------- /test/emqttd_kafka_bridge_SUITE.erl: -------------------------------------------------------------------------------- 1 | 2 | -module(emqttd_kafka_bridge_SUITE). 3 | 4 | -compile(export_all). 5 | 6 | all() -> []. 7 | 8 | groups() -> []. 9 | --------------------------------------------------------------------------------