├── .gitignore
├── Dockerfile
├── README.md
├── go.mod
├── go.sum
├── logo.svg
├── main.go
├── prometheus.yml
└── relay
    ├── config.go
    └── relay.go


/.gitignore:
--------------------------------------------------------------------------------
1 | /promqtt
2 | 


--------------------------------------------------------------------------------
/Dockerfile:
--------------------------------------------------------------------------------
 1 | FROM golang:1.16 as promqtt
 2 | WORKDIR /promqtt
 3 | COPY go.mod go.sum .
 4 | RUN go mod download
 5 | COPY . .
 6 | RUN CGO_ENABLED=0 go build -ldflags='-extldflags="-static"' .
 7 | 
 8 | FROM alpine
 9 | COPY --from=promqtt /promqtt/promqtt /usr/bin/promqtt
10 | ENTRYPOINT ["/usr/bin/promqtt"]
11 | 


--------------------------------------------------------------------------------
/README.md:
--------------------------------------------------------------------------------
  1 | ![](./logo.svg)
  2 | 
  3 | # Promqtt: Prometheus ⟷ MQTT Bridge
  4 | 
  5 | Promqtt makes Prometheus MQTT capable in a truly generic way.
  6 | 
  7 | It has no assumptions on message payloads or topic layout.
  8 | 
  9 | ## Installation
 10 | 
 11 | Promqtt is best used with Docker, an image is available at [`shorez/promqtt`](https://hub.docker.com/r/shorez/promqtt).
 12 | 
 13 | If that is no option, Promqtt can also be installed from source using Go:
 14 | 
 15 | ```sh
 16 | $ go install github.com/sh0rez/promqtt@latest
 17 | ```
 18 | 
 19 | Promqtt accepts very little configuration which is exposed as command line flags:
 20 | 
 21 | ```bash
 22 | promqtt <broker> [flags]
 23 | ```
 24 | 
 25 | **Arguments**:
 26 | 
 27 | - `broker`: Any MQTT broker (e.g. `myBroker:1883`)
 28 | 
 29 | **Flags**:
 30 | 
 31 | - `--client-id`: The MQTT Client ID to use. Defaults to `promqtt@HOSTNAME`
 32 | - `--listen`: The address to bind the HTTP server to. Defaults to `:9337`
 33 | 
 34 | Above list may be incomplete, consult `promqtt --help` for what your current build supports
 35 | 
 36 | ## Usage
 37 | 
 38 | In similar fashion to the `blackbox_exporter` and `snmp_exporter`, Promqtt acts
 39 | as a general purpose relay, meaning you do not configure specific topics, etc.
 40 | ahead of time.
 41 | 
 42 | Instead, these must be provided by Prometheus while scraping. Using clever
 43 | relabeling it makes Prometheus look like it supported MQTT itself:
 44 | 
 45 | ### Basic
 46 | 
 47 | The most basic use-case assumes a sender literally publishes `float64`
 48 | compatible values (any kind of number really) to some MQTT topic:
 49 | 
 50 | > **Topic**: `diox/06FE2A3/co2`  
 51 | > **Payload**: `42.0`
 52 | 
 53 | A possible `scrape_configs` entry for looks like this:
 54 | 
 55 | ```yaml
 56 | - job_name: diox
 57 |   metrics_path: /mqtt # Promqtt serves MQTT metrics under this path
 58 |   static_configs:
 59 |     - targets:
 60 |         - diox/.+/.+ # regular expression matching some MQTT topic
 61 |   relabel_configs:
 62 |     # copy above address (diox/...) into the "topic" URL parameter
 63 |     - source_labels: [__address__]
 64 |       target_label: __param_topic
 65 |     # and also to the instance label
 66 |     - source_labels: [__param_topic]
 67 |       target_label: instance
 68 |     # make Prometheus scrape Promqtt at ADDRESS
 69 |     - target_label: __address__
 70 |       replacement: ADDRESS:9337
 71 | ```
 72 | 
 73 | Considering above MQTT message, this would yield the following series:
 74 | 
 75 | ```bash
 76 | # TYPE diox_06FE2A3_co2 gauge
 77 | diox_06FE2A3_co2{topic="diox/06FE2A3/co2", instance="diox/.+/.+"} 42.0
 78 | ```
 79 | 
 80 | ### Regex
 81 | 
 82 | Obviously, not all MQTT devices publish perfect float values to distinct topics.
 83 | To accompany for that, Promqtt lets you optionally a regular expression using
 84 | named capture groups to extract parts of messages:
 85 | 
 86 | > **Topic**: `tele/tv/SENSOR`  
 87 | > **Payload**:
 88 | >
 89 | > ```js
 90 | > {"Time":"2021-06-27T17:38:56","ENERGY":{"TotalStartTime":"2021-01-16T13:12:08","Total":56.040,"Yesterday":0.923,"Today":0.536,"Period":1,"Power":10,"ApparentPower":32,"ReactivePower":30,"Factor":0.32,"Voltage":233,"Current":0.136}}
 91 | > ```
 92 | 
 93 | We could use the following regular expression, to parse out the `Power`,
 94 | `Voltage` and `Current` fields
 95 | ([Explanation](https://regex101.com/r/igWHKh/1/)):
 96 | 
 97 | ```regex
 98 | "Power":(?P<_power>[\d.]+).*"Voltage":(?P<_voltage>[\d.]+).*"Current":(?P<_current>[\d.]+)
 99 | ```
100 | 
101 | This gives us the following `scrape_configs` entry:
102 | 
103 | ```yaml
104 | - job_name: tasmota
105 |   metrics_path: /mqtt # Promqtt serves MQTT metrics under this path
106 |   static_configs:
107 |     - targets:
108 |         - tele/.+/SENSOR # regular expression matching some MQTT topic
109 |   params:
110 |     regex:
111 |       - '"Total": *(?P<_total_kWh>[\d.]+).*"Power": *(?P<_power_watt>[\d.]+).*"ApparentPower": *(?P<_apparent_power_VA>[\d.]+).*"ReactivePower": *(?P<_reactive_power_VAr>[\d.]+).*"Factor": *(?P<_factor>[\d.]+).*"Voltage": *(?P<_voltage>[\d.]+).*"Current": *(?P<_current>[\d.]+)'
112 | 
113 |   relabel_configs:
114 |     # copy above address (tele/...) into the "topic" URL parameter
115 |     - source_labels: [__address__]
116 |       target_label: __param_topic
117 |     # and also to the instance label
118 |     - source_labels: [__param_topic]
119 |       target_label: instance
120 |     # make Prometheus scrape Promqtt at ADDRESS
121 |     - target_label: __address__
122 |       replacement: ADDRESS:9337
123 | ```
124 | 
125 | The names of the capture groups (`_power`, `_voltage` and `_current`) are
126 | appended to the generated series name, yielding the following:
127 | 
128 | ```bash
129 | # TYPE tele_tv_SENSOR_power gauge
130 | tele_tv_SENSOR_power{topic="tele/tv/SENSOR", instance="tele/.+/SENSOR"} 10
131 | 
132 | # TYPE tele_tv_SENSOR_voltage gauge
133 | tele_tv_SENSOR_voltage{topic="tele/tv/SENSOR", instance="tele/.+/SENSOR"} 233
134 | 
135 | # TYPE tele_tv_SENSOR_current gauge
136 | tele_tv_SENSOR_current{topic="tele/tv/SENSOR", instance="tele/.+/SENSOR"} 0.136
137 | ```
138 | 
139 | ### Series renaming
140 | 
141 | Above series obviously don't quite comply with the [Prometheus naming
142 | conventions](https://prometheus.io/docs/practices/naming/).
143 | 
144 | But again, this can be fixed by adding some `metric_relabel_configs`. Continuing above example:
145 | 
146 | ```yaml
147 | - job_name: tasmota
148 |   # ...
149 |   metric_relabel_configs:
150 |     # rename series to tasmota_<field> style
151 |     - source_labels: [__name__]
152 |       target_label: __name__
153 |       regex: tele.+_SENSOR_(.+)
154 |       replacement: tasmota_$1
155 |     # extract device from topic to its own label
156 |     - source_labels: [topic]
157 |       target_label: dev
158 |       regex: tele/(.+)/.+
159 | ```
160 | 
161 | Afterwards, we get the following:
162 | 
163 | ```bash
164 | # TYPE tele_tv_SENSOR_power gauge
165 | tasmota_power{topic="tele/tv/SENSOR", instance="tele/.+/SENSOR", dev="tv"} 10
166 | 
167 | # TYPE tele_tv_SENSOR_voltage gauge
168 | tasmota_voltage{topic="tele/tv/SENSOR", instance="tele/.+/SENSOR", dev="tv"} 233
169 | 
170 | # TYPE tele_tv_SENSOR_current gauge
171 | tasmota_current{topic="tele/tv/SENSOR", instance="tele/.+/SENSOR", dev="tv"} 0.136
172 | ```
173 | 


--------------------------------------------------------------------------------
/go.mod:
--------------------------------------------------------------------------------
 1 | module github.com/sh0rez/promqtt
 2 | 
 3 | go 1.16
 4 | 
 5 | require (
 6 | 	github.com/eclipse/paho.mqtt.golang v1.3.5
 7 | 	github.com/prometheus/client_golang v1.11.0
 8 | 	github.com/spf13/pflag v1.0.5
 9 | )
10 | 


--------------------------------------------------------------------------------
/go.sum:
--------------------------------------------------------------------------------
  1 | cloud.google.com/go v0.34.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw=
  2 | github.com/alecthomas/template v0.0.0-20160405071501-a0175ee3bccc/go.mod h1:LOuyumcjzFXgccqObfd/Ljyb9UuFJ6TxHnclSeseNhc=
  3 | github.com/alecthomas/template v0.0.0-20190718012654-fb15b899a751/go.mod h1:LOuyumcjzFXgccqObfd/Ljyb9UuFJ6TxHnclSeseNhc=
  4 | github.com/alecthomas/units v0.0.0-20151022065526-2efee857e7cf/go.mod h1:ybxpYRFXyAe+OPACYpWeL0wqObRcbAqCMya13uyzqw0=
  5 | github.com/alecthomas/units v0.0.0-20190717042225-c3de453c63f4/go.mod h1:ybxpYRFXyAe+OPACYpWeL0wqObRcbAqCMya13uyzqw0=
  6 | github.com/alecthomas/units v0.0.0-20190924025748-f65c72e2690d/go.mod h1:rBZYJk541a8SKzHPHnH3zbiI+7dagKZ0cgpgrD7Fyho=
  7 | github.com/beorn7/perks v0.0.0-20180321164747-3a771d992973/go.mod h1:Dwedo/Wpr24TaqPxmxbtue+5NUziq4I4S80YR8gNf3Q=
  8 | github.com/beorn7/perks v1.0.0/go.mod h1:KWe93zE9D1o94FZ5RNwFwVgaQK1VOXiVxmqh+CedLV8=
  9 | github.com/beorn7/perks v1.0.1 h1:VlbKKnNfV8bJzeqoa4cOKqO6bYr3WgKZxO8Z16+hsOM=
 10 | github.com/beorn7/perks v1.0.1/go.mod h1:G2ZrVWU2WbWT9wwq4/hrbKbnv/1ERSJQ0ibhJ6rlkpw=
 11 | github.com/cespare/xxhash/v2 v2.1.1 h1:6MnRN8NT7+YBpUIWxHtefFZOKTAPgGjpQSxqLNn0+qY=
 12 | github.com/cespare/xxhash/v2 v2.1.1/go.mod h1:VGX0DQ3Q6kWi7AoAeZDth3/j3BFtOZR5XLFGgcrjCOs=
 13 | github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 14 | github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 15 | github.com/eclipse/paho.mqtt.golang v1.3.5 h1:sWtmgNxYM9P2sP+xEItMozsR3w0cqZFlqnNN1bdl41Y=
 16 | github.com/eclipse/paho.mqtt.golang v1.3.5/go.mod h1:eTzb4gxwwyWpqBUHGQZ4ABAV7+Jgm1PklsYT/eo8Hcc=
 17 | github.com/go-kit/kit v0.8.0/go.mod h1:xBxKIO96dXMWWy0MnWVtmwkA9/13aqxPnvrjFYMA2as=
 18 | github.com/go-kit/kit v0.9.0/go.mod h1:xBxKIO96dXMWWy0MnWVtmwkA9/13aqxPnvrjFYMA2as=
 19 | github.com/go-kit/log v0.1.0/go.mod h1:zbhenjAZHb184qTLMA9ZjW7ThYL0H2mk7Q6pNt4vbaY=
 20 | github.com/go-logfmt/logfmt v0.3.0/go.mod h1:Qt1PoO58o5twSAckw1HlFXLmHsOX5/0LbT9GBnD5lWE=
 21 | github.com/go-logfmt/logfmt v0.4.0/go.mod h1:3RMwSq7FuexP4Kalkev3ejPJsZTpXXBr9+V4qmtdjCk=
 22 | github.com/go-logfmt/logfmt v0.5.0/go.mod h1:wCYkCAKZfumFQihp8CzCvQ3paCTfi41vtzG1KdI/P7A=
 23 | github.com/go-stack/stack v1.8.0/go.mod h1:v0f6uXyyMGvRgIKkXu+yp6POWl0qKG85gN/melR3HDY=
 24 | github.com/gogo/protobuf v1.1.1/go.mod h1:r8qH/GZQm5c6nD/R0oafs1akxWv10x8SbQlK7atdtwQ=
 25 | github.com/golang/protobuf v1.2.0/go.mod h1:6lQm79b+lXiMfvg/cZm0SGofjICqVBUtrP5yJMmIC1U=
 26 | github.com/golang/protobuf v1.3.1/go.mod h1:6lQm79b+lXiMfvg/cZm0SGofjICqVBUtrP5yJMmIC1U=
 27 | github.com/golang/protobuf v1.3.2/go.mod h1:6lQm79b+lXiMfvg/cZm0SGofjICqVBUtrP5yJMmIC1U=
 28 | github.com/golang/protobuf v1.4.0-rc.1/go.mod h1:ceaxUfeHdC40wWswd/P6IGgMaK3YpKi5j83Wpe3EHw8=
 29 | github.com/golang/protobuf v1.4.0-rc.1.0.20200221234624-67d41d38c208/go.mod h1:xKAWHe0F5eneWXFV3EuXVDTCmh+JuBKY0li0aMyXATA=
 30 | github.com/golang/protobuf v1.4.0-rc.2/go.mod h1:LlEzMj4AhA7rCAGe4KMBDvJI+AwstrUpVNzEA03Pprs=
 31 | github.com/golang/protobuf v1.4.0-rc.4.0.20200313231945-b860323f09d0/go.mod h1:WU3c8KckQ9AFe+yFwt9sWVRKCVIyN9cPHBJSNnbL67w=
 32 | github.com/golang/protobuf v1.4.0/go.mod h1:jodUvKwWbYaEsadDk5Fwe5c77LiNKVO9IDvqG2KuDX0=
 33 | github.com/golang/protobuf v1.4.2/go.mod h1:oDoupMAO8OvCJWAcko0GGGIgR6R6ocIYbsSw735rRwI=
 34 | github.com/golang/protobuf v1.4.3 h1:JjCZWpVbqXDqFVmTfYWEVTMIYrL/NPdPSCHPJ0T/raM=
 35 | github.com/golang/protobuf v1.4.3/go.mod h1:oDoupMAO8OvCJWAcko0GGGIgR6R6ocIYbsSw735rRwI=
 36 | github.com/google/go-cmp v0.3.0/go.mod h1:8QqcDgzrUqlUb/G2PQTWiueGozuR1884gddMywk6iLU=
 37 | github.com/google/go-cmp v0.3.1/go.mod h1:8QqcDgzrUqlUb/G2PQTWiueGozuR1884gddMywk6iLU=
 38 | github.com/google/go-cmp v0.4.0/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/gNBxE=
 39 | github.com/google/go-cmp v0.5.4/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/gNBxE=
 40 | github.com/google/go-cmp v0.5.5 h1:Khx7svrCpmxxtHBq5j2mp/xVjsi8hQMfNLvJFAlrGgU=
 41 | github.com/google/go-cmp v0.5.5/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/gNBxE=
 42 | github.com/google/gofuzz v1.0.0/go.mod h1:dBl0BpW6vV/+mYPU4Po3pmUjxk6FQPldtuIdl/M65Eg=
 43 | github.com/gorilla/websocket v1.4.2 h1:+/TMaTYc4QFitKJxsQ7Yye35DkWvkdLcvGKqM+x0Ufc=
 44 | github.com/gorilla/websocket v1.4.2/go.mod h1:YR8l580nyteQvAITg2hZ9XVh4b55+EU/adAjf1fMHhE=
 45 | github.com/jpillora/backoff v1.0.0/go.mod h1:J/6gKK9jxlEcS3zixgDgUAsiuZ7yrSoa/FX5e0EB2j4=
 46 | github.com/json-iterator/go v1.1.6/go.mod h1:+SdeFBvtyEkXs7REEP0seUULqWtbJapLOCVDaaPEHmU=
 47 | github.com/json-iterator/go v1.1.10/go.mod h1:KdQUCv79m/52Kvf8AW2vK1V8akMuk1QjK/uOdHXbAo4=
 48 | github.com/json-iterator/go v1.1.11/go.mod h1:KdQUCv79m/52Kvf8AW2vK1V8akMuk1QjK/uOdHXbAo4=
 49 | github.com/julienschmidt/httprouter v1.2.0/go.mod h1:SYymIcj16QtmaHHD7aYtjjsJG7VTCxuUUipMqKk8s4w=
 50 | github.com/julienschmidt/httprouter v1.3.0/go.mod h1:JR6WtHb+2LUe8TCKY3cZOxFyyO8IZAc4RVcycCCAKdM=
 51 | github.com/konsorten/go-windows-terminal-sequences v1.0.1/go.mod h1:T0+1ngSBFLxvqU3pZ+m/2kptfBszLMUkC4ZK/EgS/cQ=
 52 | github.com/konsorten/go-windows-terminal-sequences v1.0.3/go.mod h1:T0+1ngSBFLxvqU3pZ+m/2kptfBszLMUkC4ZK/EgS/cQ=
 53 | github.com/kr/logfmt v0.0.0-20140226030751-b84e30acd515/go.mod h1:+0opPa2QZZtGFBFZlji/RkVcI2GknAs/DXo4wKdlNEc=
 54 | github.com/kr/pretty v0.1.0/go.mod h1:dAy3ld7l9f0ibDNOQOHHMYYIIbhfbHSm3C4ZsoJORNo=
 55 | github.com/kr/pty v1.1.1/go.mod h1:pFQYn66WHrOpPYNljwOMqo10TkYh1fy3cYio2l3bCsQ=
 56 | github.com/kr/text v0.1.0/go.mod h1:4Jbv+DJW3UT/LiOwJeYQe1efqtUx/iVham/4vfdArNI=
 57 | github.com/matttproud/golang_protobuf_extensions v1.0.1 h1:4hp9jkHxhMHkqkrB3Ix0jegS5sx/RkqARlsWZ6pIwiU=
 58 | github.com/matttproud/golang_protobuf_extensions v1.0.1/go.mod h1:D8He9yQNgCq6Z5Ld7szi9bcBfOoFv/3dc6xSMkL2PC0=
 59 | github.com/modern-go/concurrent v0.0.0-20180228061459-e0a39a4cb421/go.mod h1:6dJC0mAP4ikYIbvyc7fijjWJddQyLn8Ig3JB5CqoB9Q=
 60 | github.com/modern-go/concurrent v0.0.0-20180306012644-bacd9c7ef1dd/go.mod h1:6dJC0mAP4ikYIbvyc7fijjWJddQyLn8Ig3JB5CqoB9Q=
 61 | github.com/modern-go/reflect2 v0.0.0-20180701023420-4b7aa43c6742/go.mod h1:bx2lNnkwVCuqBIxFjflWJWanXIb3RllmbCylyMrvgv0=
 62 | github.com/modern-go/reflect2 v1.0.1/go.mod h1:bx2lNnkwVCuqBIxFjflWJWanXIb3RllmbCylyMrvgv0=
 63 | github.com/mwitkow/go-conntrack v0.0.0-20161129095857-cc309e4a2223/go.mod h1:qRWi+5nqEBWmkhHvq77mSJWrCKwh8bxhgT7d/eI7P4U=
 64 | github.com/mwitkow/go-conntrack v0.0.0-20190716064945-2f068394615f/go.mod h1:qRWi+5nqEBWmkhHvq77mSJWrCKwh8bxhgT7d/eI7P4U=
 65 | github.com/pkg/errors v0.8.0/go.mod h1:bwawxfHBFNV+L2hUp1rHADufV3IMtnDRdf1r5NINEl0=
 66 | github.com/pkg/errors v0.8.1/go.mod h1:bwawxfHBFNV+L2hUp1rHADufV3IMtnDRdf1r5NINEl0=
 67 | github.com/pkg/errors v0.9.1/go.mod h1:bwawxfHBFNV+L2hUp1rHADufV3IMtnDRdf1r5NINEl0=
 68 | github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
 69 | github.com/prometheus/client_golang v0.9.1/go.mod h1:7SWBe2y4D6OKWSNQJUaRYU/AaXPKyh/dDVn+NZz0KFw=
 70 | github.com/prometheus/client_golang v1.0.0/go.mod h1:db9x61etRT2tGnBNRi70OPL5FsnadC4Ky3P0J6CfImo=
 71 | github.com/prometheus/client_golang v1.7.1/go.mod h1:PY5Wy2awLA44sXw4AOSfFBetzPP4j5+D6mVACh+pe2M=
 72 | github.com/prometheus/client_golang v1.11.0 h1:HNkLOAEQMIDv/K+04rukrLx6ch7msSRwf3/SASFAGtQ=
 73 | github.com/prometheus/client_golang v1.11.0/go.mod h1:Z6t4BnS23TR94PD6BsDNk8yVqroYurpAkEiz0P2BEV0=
 74 | github.com/prometheus/client_model v0.0.0-20180712105110-5c3871d89910/go.mod h1:MbSGuTsp3dbXC40dX6PRTWyKYBIrTGTE9sqQNg2J8bo=
 75 | github.com/prometheus/client_model v0.0.0-20190129233127-fd36f4220a90/go.mod h1:xMI15A0UPsDsEKsMN9yxemIoYk6Tm2C1GtYGdfGttqA=
 76 | github.com/prometheus/client_model v0.2.0 h1:uq5h0d+GuxiXLJLNABMgp2qUWDPiLvgCzz2dUR+/W/M=
 77 | github.com/prometheus/client_model v0.2.0/go.mod h1:xMI15A0UPsDsEKsMN9yxemIoYk6Tm2C1GtYGdfGttqA=
 78 | github.com/prometheus/common v0.4.1/go.mod h1:TNfzLD0ON7rHzMJeJkieUDPYmFC7Snx/y86RQel1bk4=
 79 | github.com/prometheus/common v0.10.0/go.mod h1:Tlit/dnDKsSWFlCLTWaA1cyBgKHSMdTB80sz/V91rCo=
 80 | github.com/prometheus/common v0.26.0 h1:iMAkS2TDoNWnKM+Kopnx/8tnEStIfpYA0ur0xQzzhMQ=
 81 | github.com/prometheus/common v0.26.0/go.mod h1:M7rCNAaPfAosfx8veZJCuw84e35h3Cfd9VFqTh1DIvc=
 82 | github.com/prometheus/procfs v0.0.0-20181005140218-185b4288413d/go.mod h1:c3At6R/oaqEKCNdg8wHV1ftS6bRYblBhIjjI8uT2IGk=
 83 | github.com/prometheus/procfs v0.0.2/go.mod h1:TjEm7ze935MbeOT/UhFTIMYKhuLP4wbCsTZCD3I8kEA=
 84 | github.com/prometheus/procfs v0.1.3/go.mod h1:lV6e/gmhEcM9IjHGsFOCxxuZ+z1YqCvr4OA4YeYWdaU=
 85 | github.com/prometheus/procfs v0.6.0 h1:mxy4L2jP6qMonqmq+aTtOx1ifVWUgG/TAmntgbh3xv4=
 86 | github.com/prometheus/procfs v0.6.0/go.mod h1:cz+aTbrPOrUb4q7XlbU9ygM+/jj0fzG6c1xBZuNvfVA=
 87 | github.com/sirupsen/logrus v1.2.0/go.mod h1:LxeOpSwHxABJmUn/MG1IvRgCAasNZTLOkJPxbbu5VWo=
 88 | github.com/sirupsen/logrus v1.4.2/go.mod h1:tLMulIdttU9McNUspp0xgXVQah82FyeX6MwdIuYE2rE=
 89 | github.com/sirupsen/logrus v1.6.0/go.mod h1:7uNnSEd1DgxDLC74fIahvMZmmYsHGZGEOFrfsX/uA88=
 90 | github.com/spf13/pflag v1.0.5 h1:iy+VFUOCP1a+8yFto/drg2CJ5u0yRoB7fZw3DKv/JXA=
 91 | github.com/spf13/pflag v1.0.5/go.mod h1:McXfInJRrz4CZXVZOBLb0bTZqETkiAhM9Iw0y3An2Bg=
 92 | github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
 93 | github.com/stretchr/objx v0.1.1/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
 94 | github.com/stretchr/testify v1.2.2/go.mod h1:a8OnRcib4nhh0OaRAV+Yts87kKdq0PP7pXfy6kDkUVs=
 95 | github.com/stretchr/testify v1.3.0/go.mod h1:M5WIy9Dh21IEIfnGCwXGc5bZfKNJtfHm1UVUgZn+9EI=
 96 | github.com/stretchr/testify v1.4.0/go.mod h1:j7eGeouHqKxXV5pUuKE4zz7dFj8WfuZ+81PSLYec5m4=
 97 | golang.org/x/crypto v0.0.0-20180904163835-0709b304e793/go.mod h1:6SG95UA2DQfeDnfUPMdvaQW0Q7yPrPDi9nlGo2tz2b4=
 98 | golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2/go.mod h1:djNgcEr1/C05ACkg1iLfiJU5Ep61QUkGW8qpdssI0+w=
 99 | golang.org/x/crypto v0.0.0-20200622213623-75b288015ac9/go.mod h1:LzIPMQfyMNhhGPhUkYOs5KpL4U8rLKemX1yGLhDgUto=
100 | golang.org/x/net v0.0.0-20180724234803-3673e40ba225/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
101 | golang.org/x/net v0.0.0-20181114220301-adae6a3d119a/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
102 | golang.org/x/net v0.0.0-20190108225652-1e06a53dbb7e/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
103 | golang.org/x/net v0.0.0-20190404232315-eb5bcb51f2a3/go.mod h1:t9HGtf8HONx5eT2rtn7q6eTqICYqUVnKs3thJo3Qplg=
104 | golang.org/x/net v0.0.0-20190613194153-d28f0bde5980/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
105 | golang.org/x/net v0.0.0-20200425230154-ff2c4b7c35a0/go.mod h1:qpuaurCH72eLCgpAm/N6yyVIVM9cpaDIP3A8BGJEC5A=
106 | golang.org/x/net v0.0.0-20200625001655-4c5254603344 h1:vGXIOMxbNfDTk/aXCmfdLgkrSV+Z2tcbze+pEc3v5W4=
107 | golang.org/x/net v0.0.0-20200625001655-4c5254603344/go.mod h1:/O7V0waA8r7cgGh81Ro3o1hOxt32SMVPicZroKQ2sZA=
108 | golang.org/x/oauth2 v0.0.0-20190226205417-e64efc72b421/go.mod h1:gOpvHmFTYa4IltrdGE7lF6nIHvwfUNPOp7c8zoXwtLw=
109 | golang.org/x/sync v0.0.0-20181108010431-42b317875d0f/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
110 | golang.org/x/sync v0.0.0-20181221193216-37e7f081c4d4/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
111 | golang.org/x/sync v0.0.0-20190911185100-cd5d95a43a6e/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
112 | golang.org/x/sync v0.0.0-20201207232520-09787c993a3a/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
113 | golang.org/x/sys v0.0.0-20180905080454-ebe1bf3edb33/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
114 | golang.org/x/sys v0.0.0-20181116152217-5ac8a444bdc5/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
115 | golang.org/x/sys v0.0.0-20190215142949-d0b11bdaac8a/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
116 | golang.org/x/sys v0.0.0-20190412213103-97732733099d/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
117 | golang.org/x/sys v0.0.0-20190422165155-953cdadca894/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
118 | golang.org/x/sys v0.0.0-20200106162015-b016eb3dc98e/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
119 | golang.org/x/sys v0.0.0-20200323222414-85ca7c5b95cd/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
120 | golang.org/x/sys v0.0.0-20200615200032-f1bc736245b1/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
121 | golang.org/x/sys v0.0.0-20200625212154-ddb9806d33ae/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
122 | golang.org/x/sys v0.0.0-20210124154548-22da62e12c0c/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
123 | golang.org/x/sys v0.0.0-20210603081109-ebe580a85c40 h1:JWgyZ1qgdTaF3N3oxC+MdTV7qvEEgHo3otj+HB5CM7Q=
124 | golang.org/x/sys v0.0.0-20210603081109-ebe580a85c40/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
125 | golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
126 | golang.org/x/text v0.3.2/go.mod h1:bEr9sfX3Q8Zfm5fL9x+3itogRgK3+ptLWKqgva+5dAk=
127 | golang.org/x/tools v0.0.0-20180917221912-90fa682c2a6e/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=
128 | golang.org/x/xerrors v0.0.0-20191204190536-9bdfabe68543 h1:E7g+9GITq07hpfrRu66IVDexMakfv52eLZ2CXBWiKr4=
129 | golang.org/x/xerrors v0.0.0-20191204190536-9bdfabe68543/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
130 | google.golang.org/appengine v1.4.0/go.mod h1:xpcJRLb0r/rnEns0DIKYYv+WjYCduHsrkT7/EB5XEv4=
131 | google.golang.org/protobuf v0.0.0-20200109180630-ec00e32a8dfd/go.mod h1:DFci5gLYBciE7Vtevhsrf46CRTquxDuWsQurQQe4oz8=
132 | google.golang.org/protobuf v0.0.0-20200221191635-4d8936d0db64/go.mod h1:kwYJMbMJ01Woi6D6+Kah6886xMZcty6N08ah7+eCXa0=
133 | google.golang.org/protobuf v0.0.0-20200228230310-ab0ca4ff8a60/go.mod h1:cfTl7dwQJ+fmap5saPgwCLgHXTUD7jkjRqWcaiX5VyM=
134 | google.golang.org/protobuf v1.20.1-0.20200309200217-e05f789c0967/go.mod h1:A+miEFZTKqfCUM6K7xSMQL9OKL/b6hQv+e19PK+JZNE=
135 | google.golang.org/protobuf v1.21.0/go.mod h1:47Nbq4nVaFHyn7ilMalzfO3qCViNmqZ2kzikPIcrTAo=
136 | google.golang.org/protobuf v1.23.0/go.mod h1:EGpADcykh3NcUnDUJcl1+ZksZNG86OlYog2l/sGQquU=
137 | google.golang.org/protobuf v1.26.0-rc.1 h1:7QnIQpGRHE5RnLKnESfDoxm2dTapTZua5a0kS0A+VXQ=
138 | google.golang.org/protobuf v1.26.0-rc.1/go.mod h1:jlhhOSvTdKEhbULTjvd4ARK9grFBp09yW+WbY/TyQbw=
139 | gopkg.in/alecthomas/kingpin.v2 v2.2.6/go.mod h1:FMv+mEhP44yOT+4EoQTLFTRgOQ1FBLkstjWtayDeSgw=
140 | gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
141 | gopkg.in/check.v1 v1.0.0-20190902080502-41f04d3bba15/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
142 | gopkg.in/yaml.v2 v2.2.1/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
143 | gopkg.in/yaml.v2 v2.2.2/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
144 | gopkg.in/yaml.v2 v2.2.4/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
145 | gopkg.in/yaml.v2 v2.2.5/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
146 | gopkg.in/yaml.v2 v2.3.0/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
147 | 


--------------------------------------------------------------------------------
/logo.svg:
--------------------------------------------------------------------------------
 1 | <svg width="1200" height="600" xmlns="http://www.w3.org/2000/svg" preserveAspectRatio="xMidYMid meet" version="1.0">
 2 | 
 3 |  <g>
 4 |   <title>Layer 1</title>
 5 |   <g id="svg_1" fill="#000000">
 6 |    <path id="svg_2" d="m386.12369,300c0,-70.7 0.3,-107 1,-107c0.7,0 1,36.3 1,107c0,70.7 -0.3,107 -1,107c-0.7,0 -1,-36.3 -1,-107z"/>
 7 |    <path id="svg_3" d="m222.32369,390.6c-9.9,-2.4 -20.1,-8.3 -27.7,-16.1c-11.2,-11.3 -16.6,-24.9 -16.6,-41.4c0.1,-14.7 2.8,-25.5 10.1,-39.3c13.9,-26.1 14.5,-27.5 14.6,-36.8c0.1,-4.7 0.2,-8.9 0.2,-9.3c0.5,-2.4 11.6,7 16.5,13.9c5,6.9 7.8,15 8.6,24.4l0.6,7.5l2.6,-4.5c4.6,-7.8 6.1,-12.3 6.6,-20.2c0.7,-9.6 -1.1,-17.7 -7.3,-32.5c-4.1,-9.9 -4.8,-13.3 -2.6,-13.3c2,0 22.2,15.8 28.8,22.6c19.6,20 32.9,45.6 36.4,69.9c1.4,10.2 1.2,25.1 -0.5,32.4c-4.8,20.2 -22,37.3 -43,42.6c-7.1,1.8 -20,1.8 -27.3,0.1zm24.3,-3.7c15.5,-2.9 31.1,-14.7 37.8,-28.9c4.7,-10 6.1,-17.7 5.4,-30.3c-1.6,-30 -12.9,-55.4 -34.9,-77.8c-10.2,-10.5 -22.7,-20.6 -21.4,-17.3c3.8,9.1 7.8,22.4 8.5,28.5c1.1,8.6 0.2,14.9 -3.4,22.7c-3.3,7.1 -11.2,18.2 -13.1,18.2c-1.6,0 -1.6,0.2 -1.4,-10.5c0.1,-13.8 -3.7,-23.8 -12.3,-32.3l-4.4,-4.4l-0.5,6.1c-0.4,6.3 -0.3,6 -15.6,35.6c-6.4,12.5 -8.2,19 -8.9,33c-0.9,18.5 3.2,29.9 15.3,42.2c13,13.3 30.3,18.7 48.9,15.2z"/>
 8 |    <path id="svg_4" d="m227.02369,358.8c-4.5,-2.5 -7.9,-8.3 -7.9,-13.3c0,-2.9 0.3,-3.6 1.7,-3.3c1.2,0.2 2,1.6 2.4,4.1c0.4,2.4 1.8,5.1 3.8,7c2.8,2.9 3.7,3.2 9.1,3.2c5.1,0 6.3,-0.4 8.9,-2.9c1.9,-1.8 3.4,-4.5 3.9,-7c0.5,-2.8 1.3,-4.2 2.6,-4.4c1.7,-0.4 1.8,0.1 1.4,4.2c-0.7,5.6 -4.7,11.2 -9.4,13.2c-4.9,2.1 -12.3,1.7 -16.5,-0.8z"/>
 9 |    <path id="svg_5" d="m207.12369,331.1c-2.5,-4.7 -0.3,-12.1 3.5,-12.1c2,0 4.5,4 4.5,7c0,5.7 -5.7,9.3 -8,5.1z"/>
10 |    <path id="svg_6" d="m258.12369,331.1c-2.2,-4.2 0,-12.1 3.4,-12.1c2.2,0 4.6,3.5 4.6,6.9c0,4.5 -1.6,7.1 -4.5,7.1c-1.4,0 -2.9,-0.8 -3.5,-1.9z"/>
11 |    <path id="svg_7" d="m849.62369,361.6c-6.2,-2.8 -9.5,-8.7 -9.5,-17.2l0,-4.1l-5.5,-1.2c-10.3,-2.3 -16.7,-9.3 -20,-21.6c-2.2,-8.2 -3,-30.7 -1.6,-43.2c1.9,-17.3 6,-25.2 15.8,-30c5.3,-2.6 6.7,-2.8 16.8,-2.8c12.5,0 17.3,1.6 23.5,7.7c8,7.9 10,16.1 10,41.3c0,20 -1.1,28.1 -4.8,34.9c-3.4,6.2 -10.8,12.2 -16.2,13.1c-2.3,0.4 -4.4,1.3 -4.7,2.1c-0.9,2.3 1.8,7.4 4.1,7.8c10.1,1.9 10.1,1.9 10.4,5.9c0.2,2.3 -0.3,4.8 -1.3,6.3c-1.4,2.1 -2.3,2.4 -7.8,2.4c-3.4,-0.1 -7.5,-0.7 -9.2,-1.4zm3.4,-41.1c5.5,-2.8 6.6,-7 6.9,-27.2c0.4,-20.4 -0.7,-27 -5.3,-31.3c-2.3,-2.2 -3.6,-2.5 -9.6,-2.5c-6,0 -7.2,0.3 -9.4,2.6c-3.8,3.7 -4.5,8.2 -4.5,28.4c-0.1,20.6 0.7,24.9 5,28.8c2.5,2.2 3.9,2.7 8.6,2.7c3,0 6.8,-0.7 8.3,-1.5z"/>
12 |    <path id="svg_8" d="m599.52369,339.1c-7.7,-1.9 -12.8,-8.2 -19.4,-23.6c-5.8,-13.8 -6.9,-15.5 -10,-15.5l-2.5,0l-0.2,18.5c-0.1,10.1 -0.4,18.9 -0.8,19.5c-0.9,1.5 -15,1.3 -16.3,-0.3c-1.7,-2 -1.1,-92.2 0.6,-93.9c1.8,-1.8 23.2,-2.3 35.2,-0.8c11,1.4 19.2,5.1 22.7,10.3c1.2,1.7 2.9,6 3.8,9.4c1.7,7 1,15.4 -2.1,21.8c-2.1,4.4 -8.2,9.8 -14.6,12.8l-4.9,2.3l5,10.1c2.8,5.5 5.8,10.6 6.6,11.3c0.8,0.7 3.7,1.7 6.3,2.1c5.5,1.1 7.2,2.9 7.2,8.1c0,4.2 -2.7,7.8 -5.9,7.8c-1,0 -3.1,0.2 -4.7,0.4c-1.6,0.3 -4.3,0.1 -6,-0.3zm-8.1,-58.5c4.6,-3.5 4.2,-12.9 -0.9,-17.7c-2.4,-2.2 -3.3,-2.4 -12.6,-2.4l-10.1,0l-0.2,10.8l-0.2,10.7l11.1,0c7.7,-0.1 11.6,-0.5 12.9,-1.4z"/>
13 |    <path id="svg_9" d="m649.12369,339.1c-10.7,-3.5 -16.6,-11.1 -18.9,-24.6c-3,-17.9 -2.1,-44.2 2.1,-55.2c2.6,-7.1 7.5,-12.5 13.6,-15.1c5.8,-2.5 22.4,-3.3 28.8,-1.4c6.7,2 13,7.6 16.7,15.1l3.2,6.6l0,26.5l0,26.5l-2.9,5.5c-3.5,6.7 -7.8,11.5 -13.1,14.3c-3.3,1.7 -6,2.2 -15.5,2.4c-6.3,0.1 -12.6,-0.1 -14,-0.6zm21,-19c5.1,-3.6 5.5,-5.9 5.5,-29.1c0,-18.8 -0.2,-22 -1.8,-25.2c-4.3,-8.6 -19.8,-9 -24.4,-0.6c-1.6,2.9 -1.8,5.9 -1.8,25.3c0,23.3 0.4,25.4 5.1,29.7c3.5,3.1 12.9,3 17.4,-0.1z"/>
14 |    <path id="svg_10" d="m719.62369,339l-7,-0.5l0,-46.9c0,-37.6 0.3,-47.2 1.3,-48.3c1.7,-1.7 12.3,-1.7 14.4,-0.1c2.2,1.8 12.3,19.6 18.8,33.2c4.8,10.1 7,13.4 7,10.8c0,-1.9 22.1,-40.8 24.9,-44c1.5,-1.6 12.2,-1.6 14.4,0.1c1.5,1.1 1.7,5.6 1.8,47.6c0,25.4 -0.3,46.7 -0.8,47.1c-1,1.1 -15.1,1.6 -16.1,0.6c-0.4,-0.4 -0.9,-13.4 -1.2,-28.9l-0.5,-28.1l-7.9,14.5c-10.9,19.7 -11.2,20.1 -14.9,19.7c-3.2,-0.3 -4.8,-2.6 -18.3,-25.7l-4.9,-8.5l-0.5,28.5c-0.3,15.6 -0.7,28.5 -0.8,28.5c-1,0.7 -3.7,0.8 -9.7,0.4z"/>
15 |    <path id="svg_11" d="m469.62369,337.8c-0.2,-0.7 -0.6,-19.3 -0.9,-41.3c-0.4,-37.8 0,-51.5 1.8,-53.2c1.3,-1.4 24.6,-1.5 34.6,-0.3c16.6,2 23.4,7 26.7,19.7c2.8,10.7 -0.1,21.8 -7.3,28.4c-7.2,6.4 -12.2,8.1 -25.5,8.7l-11.9,0.5l-0.2,11.1c-0.1,6.1 -0.2,14.3 -0.3,18.1c0,3.9 -0.4,7.6 -0.8,8.3c-0.5,0.8 -3.4,1.2 -8.3,1.2c-5.1,0 -7.6,-0.4 -7.9,-1.2zm40,-56.4c2.1,-0.8 4.5,-5.6 4.5,-8.9c0,-4.1 -2.9,-9.4 -6.1,-11c-1.8,-1 -5.9,-1.5 -11.9,-1.5l-9,0l0,11l0,11l10.4,0c5.7,0 11.2,-0.3 12.1,-0.6z"/>
16 |    <path id="svg_12" d="m913.12369,337c-0.7,-1.3 -0.8,-13.5 -0.4,-39c0.4,-22 0.4,-37.1 -0.2,-37.1c-0.5,-0.1 -5.1,-0.2 -10.2,-0.3c-10.9,-0.2 -11.2,-0.4 -11.2,-9.3c0,-10.1 -2.7,-9.3 29.9,-9.3c21,0 29,0.3 29.9,1.2c1.7,1.7 1.6,14.3 -0.2,16.1c-1.1,1 -3.7,1.3 -10.5,1.1l-9.1,-0.3l0,38.5l0,38.4l-2.6,1c-1.4,0.6 -5.2,1 -8.4,1c-4.9,0 -6.1,-0.3 -7,-2z"/>
17 |    <path id="svg_13" d="m984.12369,338c-1.3,-0.8 -1.5,-6 -1.2,-38.8c0.3,-30.6 0.1,-38 -1,-38.4c-0.7,-0.3 -5.3,-0.4 -10.1,-0.3c-8.5,0.2 -8.9,0.1 -9.8,-2.2c-1.4,-3.8 -1.1,-13.9 0.5,-15.2c0.9,-0.8 9.7,-1.1 30.2,-0.9l28.9,0.3l0.3,7.9c0.2,4.5 -0.2,8.4 -0.7,8.9c-0.6,0.6 -5.2,1.1 -10.3,1.1l-9.3,0.1l-0.2,38c-0.3,34.4 -0.5,38.1 -2,39.3c-2,1.4 -13.1,1.6 -15.3,0.2z"/>
18 |   </g>
19 |  </g>
20 | </svg>


--------------------------------------------------------------------------------
/main.go:
--------------------------------------------------------------------------------
 1 | package main
 2 | 
 3 | import (
 4 | 	"fmt"
 5 | 	"log"
 6 | 	"net/http"
 7 | 	"os"
 8 | 
 9 | 	"github.com/prometheus/client_golang/prometheus/promhttp"
10 | 	"github.com/sh0rez/promqtt/relay"
11 | 	"github.com/spf13/pflag"
12 | )
13 | 
14 | func main() {
15 | 	cfg := relay.DefaultConfig()
16 | 	pflag.StringVar(&cfg.ClientID, "client-id", cfg.ClientID, "mqtt client id")
17 | 	pflag.StringVar(&cfg.Listen, "listen", cfg.Listen, "address to listen on")
18 | 	pflag.BoolVarP(&cfg.Verbose, "verbose", "v", cfg.Verbose, "verbose logging")
19 | 
20 | 	pflag.StringVarP(&cfg.Username, "username", "u", cfg.Username, "mqtt username")
21 | 	pflag.StringVarP(&cfg.Password, "password", "p", cfg.Password, "mqtt password")
22 | 
23 | 	pflag.DurationVar(&cfg.PingTimeout, "ping-timeout", cfg.PingTimeout, "time to wait for PING response from broker")
24 | 
25 | 	pflag.Usage = func() {
26 | 		fmt.Printf("Usage: %s <broker> [flags]\n", os.Args[0])
27 | 		pflag.PrintDefaults()
28 | 		os.Exit(1)
29 | 	}
30 | 
31 | 	pflag.Parse()
32 | 	if len(pflag.Args()) != 1 {
33 | 		pflag.Usage()
34 | 	}
35 | 
36 | 	cfg.Broker = pflag.Arg(0)
37 | 
38 | 	r, err := relay.New(cfg)
39 | 	if err != nil {
40 | 		log.Fatalln(err)
41 | 	}
42 | 
43 | 	http.Handle("/mqtt", r)
44 | 	http.Handle("/metrics", promhttp.Handler())
45 | 
46 | 	log.Printf("listening at %s", cfg.Listen)
47 | 	if err := http.ListenAndServe(cfg.Listen, nil); err != nil {
48 | 		log.Fatalln(err)
49 | 	}
50 | }
51 | 


--------------------------------------------------------------------------------
/prometheus.yml:
--------------------------------------------------------------------------------
 1 | global:
 2 |   scrape_interval: 15s
 3 | scrape_configs:
 4 |   - job_name: "mqtt"
 5 |     metrics_path: /mqtt
 6 |     static_configs:
 7 |       - targets:
 8 |           - diox/+/+
 9 |     relabel_configs:
10 |       - source_labels: [__address__]
11 |         target_label: __param_topic
12 |       - source_labels: [__param_topic]
13 |         target_label: instance
14 |       - target_label: __address__
15 |         replacement: 127.0.0.1:9337
16 |     metric_relabel_configs:
17 |       - source_labels: [topic]
18 |         target_label: dev
19 |         regex: diox/(.+)/.+
20 |       - source_labels: [topic]
21 |         target_label: __name__
22 |         regex: diox/.+/(.+)
23 |         replacement: "diox_$1"
24 |       - regex: topic
25 |         action: labeldrop
26 | 


--------------------------------------------------------------------------------
/relay/config.go:
--------------------------------------------------------------------------------
 1 | package relay
 2 | 
 3 | import (
 4 | 	"os"
 5 | 	"time"
 6 | 
 7 | 	mqtt "github.com/eclipse/paho.mqtt.golang"
 8 | )
 9 | 
10 | type Config struct {
11 | 	Broker   string
12 | 	ClientID string
13 | 
14 | 	Listen  string
15 | 	Verbose bool
16 | 
17 | 	Username string
18 | 	Password string
19 | 
20 | 	PingTimeout time.Duration
21 | }
22 | 
23 | func DefaultConfig() Config {
24 | 	opts := mqtt.NewClientOptions()
25 | 
26 | 	clientID := "promqtt"
27 | 	if hostname, err := os.Hostname(); err == nil {
28 | 		clientID += "@" + hostname
29 | 	}
30 | 
31 | 	return Config{
32 | 		ClientID: clientID,
33 | 
34 | 		Listen:  ":9337",
35 | 		Verbose: false,
36 | 
37 | 		PingTimeout: opts.PingTimeout,
38 | 	}
39 | }
40 | 
41 | func (c Config) MQTT() *mqtt.ClientOptions {
42 | 	return mqtt.NewClientOptions().
43 | 		AddBroker(c.Broker).
44 | 		SetClientID(c.ClientID).
45 | 		SetUsername(c.Username).
46 | 		SetPassword(c.Password).
47 | 		SetPingTimeout(c.PingTimeout)
48 | }
49 | 


--------------------------------------------------------------------------------
/relay/relay.go:
--------------------------------------------------------------------------------
  1 | package relay
  2 | 
  3 | import (
  4 | 	"fmt"
  5 | 	"log"
  6 | 	"net/http"
  7 | 	"os"
  8 | 	"regexp"
  9 | 	"strconv"
 10 | 	"strings"
 11 | 	"sync"
 12 | 
 13 | 	mqtt "github.com/eclipse/paho.mqtt.golang"
 14 | 	"github.com/prometheus/client_golang/prometheus"
 15 | 	"github.com/prometheus/client_golang/prometheus/promhttp"
 16 | )
 17 | 
 18 | func New(cfg Config) (*Relay, error) {
 19 | 	mqtt.ERROR = log.New(os.Stderr, "", log.Flags())
 20 | 	if cfg.Verbose {
 21 | 		mqtt.DEBUG = log.New(os.Stderr, "debug:", log.Flags())
 22 | 	}
 23 | 
 24 | 	r := &Relay{
 25 | 		data: make(map[string]string),
 26 | 	}
 27 | 
 28 | 	opts := cfg.MQTT()
 29 | 	if len(opts.Servers) == 0 {
 30 | 		return nil, fmt.Errorf("must specify broker url")
 31 | 	}
 32 | 
 33 | 	opts.SetConnectionLostHandler(func(c mqtt.Client, e error) {
 34 | 		log.Printf("connection lost: %s", e.Error())
 35 | 	})
 36 | 
 37 | 	opts.SetOnConnectHandler(func(c mqtt.Client) {
 38 | 		tok := c.Subscribe("#", 0, r.HandleMQTT)
 39 | 
 40 | 		if tok.Wait() && tok.Error() != nil {
 41 | 			log.Fatalf("failed to subscribe to all topics: %s", tok.Error())
 42 | 		}
 43 | 		log.Println("subscribed to '#'")
 44 | 	})
 45 | 
 46 | 	if tok := mqtt.NewClient(opts).Connect(); tok.Wait() && tok.Error() != nil {
 47 | 		return nil, tok.Error()
 48 | 	}
 49 | 
 50 | 	return r, nil
 51 | }
 52 | 
 53 | type Relay struct {
 54 | 	mu   sync.RWMutex
 55 | 	data map[string]string
 56 | }
 57 | 
 58 | func (rl *Relay) ServeHTTP(w http.ResponseWriter, r *http.Request) {
 59 | 	topic := r.URL.Query().Get("topic")
 60 | 	if topic == "" {
 61 | 		http.Error(w, "must pass topic", http.StatusBadRequest)
 62 | 		return
 63 | 	}
 64 | 	topicExp, err := regexp.Compile(topic)
 65 | 	if err != nil {
 66 | 		http.Error(w, err.Error(), http.StatusBadRequest)
 67 | 		return
 68 | 	}
 69 | 
 70 | 	regex := r.URL.Query().Get("regex")
 71 | 	if regex == "" {
 72 | 		regex = `(.*)`
 73 | 	}
 74 | 
 75 | 	regexExp, err := regexp.Compile(regex)
 76 | 	if err != nil {
 77 | 		http.Error(w, err.Error(), http.StatusBadRequest)
 78 | 		return
 79 | 	}
 80 | 
 81 | 	reg := rl.metrics(topicExp, regexExp)
 82 | 	promhttp.HandlerFor(reg, promhttp.HandlerOpts{}).ServeHTTP(w, r)
 83 | }
 84 | 
 85 | func (rl *Relay) metrics(topicExp, matcher *regexp.Regexp) *prometheus.Registry {
 86 | 	reg := prometheus.NewRegistry()
 87 | 
 88 | 	rl.mu.RLock()
 89 | 	defer rl.mu.RUnlock()
 90 | 
 91 | 	for topic, data := range rl.data {
 92 | 		if !topicExp.MatchString(topic) {
 93 | 			continue
 94 | 		}
 95 | 
 96 | 		matches := matcher.FindStringSubmatch(data)
 97 | 		if len(matches) == 0 {
 98 | 			continue
 99 | 		}
100 | 
101 | 		for i, name := range matcher.SubexpNames() {
102 | 			if i == 0 {
103 | 				continue
104 | 			}
105 | 
106 | 			value, err := strconv.ParseFloat(matches[i], 64)
107 | 			if err != nil {
108 | 				log.Printf("failed to parse '%s' from '%s' as float64", data, topic)
109 | 				continue
110 | 			}
111 | 
112 | 			g := prometheus.NewGauge(prometheus.GaugeOpts{
113 | 				Name:        metricName(topic) + name,
114 | 				ConstLabels: prometheus.Labels{"topic": topic},
115 | 			})
116 | 			g.Set(value)
117 | 
118 | 			if err := reg.Register(g); err != nil {
119 | 				log.Println(err)
120 | 			}
121 | 		}
122 | 	}
123 | 
124 | 	return reg
125 | }
126 | 
127 | func (rl *Relay) HandleMQTT(c mqtt.Client, m mqtt.Message) {
128 | 	rl.mu.Lock()
129 | 	rl.data[m.Topic()] = string(m.Payload())
130 | 	rl.mu.Unlock()
131 | }
132 | 
133 | // metricName sanitizes a string so that it becomes a valid Prometheus metric
134 | // name by replacing all illegal characters with underscores (_)
135 | func metricName(s string) string {
136 | 	return strings.ReplaceAll(s, "/", "_")
137 | }
138 | 


--------------------------------------------------------------------------------