prototype gatherer

This commit is contained in:
Niko Abeler 2023-02-11 21:32:51 +01:00
parent 275e41cbc0
commit 735828988f
6 changed files with 344 additions and 7 deletions

3
.gitignore vendored
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@ -1,3 +1,4 @@
influx-data/ influx-data/
tokens/*.txt tokens/*.txt
passwords* passwords*
.env

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@ -13,6 +13,11 @@ services:
- ./rabbitmq/rabbitmq.conf:/etc/rabbitmq/rabbitmq.conf:ro - ./rabbitmq/rabbitmq.conf:/etc/rabbitmq/rabbitmq.conf:ro
- ./rabbitmq/definitions.json:/etc/rabbitmq/definitions.json:ro - ./rabbitmq/definitions.json:/etc/rabbitmq/definitions.json:ro
- ./rabbitmq/enabled_plugins:/etc/rabbitmq/enabled_plugins:rw - ./rabbitmq/enabled_plugins:/etc/rabbitmq/enabled_plugins:rw
healthcheck:
test: rabbitmq-diagnostics -q ping
interval: 3s
timeout: 1s
retries: 10
influx: influx:
hostname: influx hostname: influx
image: influxdb:2.6 image: influxdb:2.6
@ -22,17 +27,27 @@ services:
- ./influx-data:/var/lib/influxdb2:rw - ./influx-data:/var/lib/influxdb2:rw
- ./influx/scripts:/docker-entrypoint-initdb.d - ./influx/scripts:/docker-entrypoint-initdb.d
- ./tokens:/tokens:rw - ./tokens:/tokens:rw
env_file:
- .env
environment: environment:
- DOCKER_INFLUXDB_INIT_MODE=setup - DOCKER_INFLUXDB_INIT_MODE=setup
- DOCKER_INFLUXDB_INIT_USERNAME=admin - DOCKER_INFLUXDB_INIT_USERNAME=admin
- DOCKER_INFLUXDB_INIT_PASSWORD=admin1234
- DOCKER_INFLUXDB_INIT_ORG=home - DOCKER_INFLUXDB_INIT_ORG=home
- DOCKER_INFLUXDB_INIT_BUCKET=sensor - DOCKER_INFLUXDB_INIT_BUCKET=sensor
gatherer: gatherer:
hostname: gatherer hostname: gatherer
volumes: build: gatherer
- ./tokens:/tokens:ro volumes:
depends_on: - ./tokens:/tokens:ro
- rabbitmq env_file:
- influx - .env
environment:
- INFLUX_URL=http://influx:8086
- INFLUX_ORG=home
- INFLUX_BUCKET=sensor
depends_on:
rabbitmq:
condition: service_healthy
influx:
condition: service_started

16
gatherer/Dockerfile Normal file
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@ -0,0 +1,16 @@
FROM golang:1.20 AS builder
WORKDIR /gatherer
COPY go.mod go.sum ./
RUN go mod download
COPY . .
RUN go build -o /bin/gatherer
FROM debian:buster-slim
COPY --from=builder /bin/gatherer /bin/gatherer
ENTRYPOINT ["/bin/gatherer"]

13
gatherer/go.mod Normal file
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module h4kor/gatherer
go 1.19
require github.com/rabbitmq/amqp091-go v1.6.1
require (
github.com/deepmap/oapi-codegen v1.8.2 // indirect
github.com/influxdata/influxdb-client-go/v2 v2.12.2 // indirect
github.com/influxdata/line-protocol v0.0.0-20200327222509-2487e7298839 // indirect
github.com/pkg/errors v0.9.1 // indirect
golang.org/x/net v0.0.0-20210405180319-a5a99cb37ef4 // indirect
)

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gatherer/go.sum Normal file
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@ -0,0 +1,99 @@
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github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
github.com/deepmap/oapi-codegen v1.8.2 h1:SegyeYGcdi0jLLrpbCMoJxnUUn8GBXHsvr4rbzjuhfU=
github.com/deepmap/oapi-codegen v1.8.2/go.mod h1:YLgSKSDv/bZQB7N4ws6luhozi3cEdRktEqrX88CvjIw=
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gatherer/main.go Normal file
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package main
import (
"context"
"encoding/json"
"fmt"
"io/ioutil"
"log"
"os"
"strconv"
"strings"
"time"
influxdb2 "github.com/influxdata/influxdb-client-go/v2"
amqp "github.com/rabbitmq/amqp091-go"
)
func failOnError(err error, msg string) {
if err != nil {
log.Panicf("%s: %s", msg, err)
}
}
func create_and_connect_to_queue(ch *amqp.Channel, name string, routing_key string) <-chan amqp.Delivery {
q, err := ch.QueueDeclare(
name, // name
false, // durable
false, // delete when unused
true, // exclusive
false, // no-wait
nil, // arguments
)
failOnError(err, "Failed to declare a queue")
err = ch.QueueBind(
q.Name, // queue name
routing_key, // routing key
"amq.topic", // exchange
false,
nil,
)
failOnError(err, "Failed to bind a queue")
msgs, err := ch.Consume(
q.Name, // queue
"", // consumer
true, // auto ack
false, // exclusive
false, // no local
false, // no wait
nil, // args
)
failOnError(err, "Failed to register a consumer")
return msgs
}
func main() {
// read token from /token/read_write_token.txt file
token_file := "/tokens/read_write.txt"
influx_token, err := ioutil.ReadFile(token_file)
failOnError(err, "Failed to read token file")
fmt.Println("InfluxDB token:")
fmt.Println(strings.TrimSpace(string(influx_token)))
// Create a new client using an InfluxDB server base URL and an authentication token
client := influxdb2.NewClient(
os.Getenv("INFLUX_URL"),
strings.TrimSpace(string(influx_token)),
)
// Use blocking write client for writes to desired bucket
writeAPI := client.WriteAPIBlocking(
os.Getenv("INFLUX_ORG"),
os.Getenv("INFLUX_BUCKET"),
)
var conn *amqp.Connection
amqp_url := os.Getenv("AMQP_URL")
for {
conn, err = amqp.Dial(amqp_url)
if err != nil {
log.Printf("Failed to connect to RabbitMQ: %s", err)
time.Sleep(5 * time.Second)
} else {
break
}
}
defer conn.Close()
ch, err := conn.Channel()
failOnError(err, "Failed to open a channel")
defer ch.Close()
err = ch.ExchangeDeclare(
"amq.topic", // name
"topic", // type
true, // durable
false, // auto-deleted
false, // internal
false, // no-wait
nil, // arguments
)
failOnError(err, "Failed to declare an exchange")
var forever chan struct{}
shelly_msgs := create_and_connect_to_queue(ch, "shelly", "shellies.#")
tasmota_msgs := create_and_connect_to_queue(ch, "tasmota", "tele.#.SENSOR")
go func() {
for d := range shelly_msgs {
log.Printf(" [x] %s: %s", d.RoutingKey, d.Body)
parts := strings.Split(d.RoutingKey, ".")
field := parts[len(parts)-1]
device := strings.Join(parts[1:len(parts)-1], ".")
// try to cast to float64
float_value, err := strconv.ParseFloat(string(d.Body), 64)
var values map[string]interface{}
if err == nil {
values = map[string]interface{}{
field: float_value,
}
} else {
values = map[string]interface{}{
field: string(d.Body),
}
}
err = writeAPI.WritePoint(
context.Background(),
influxdb2.NewPoint(
"shelly",
map[string]string{
"device": device,
},
values,
time.Now(),
),
)
if err != nil {
log.Printf("Failed to write point: %s", err)
}
}
}()
go func() {
for d := range tasmota_msgs {
log.Printf(" [ ] %s: %s", d.RoutingKey, d.Body)
parts := strings.Split(d.RoutingKey, ".")
device := strings.Join(parts[1:len(parts)-2], ".")
// read body as json
var values map[string]interface{}
err := json.Unmarshal(d.Body, &values)
if err != nil {
log.Printf("Failed to parse json: %s", err)
continue
}
var sensor_data map[string]interface{} = values["AM2301"].(map[string]interface{})
// get relevant values
relevant_values := map[string]interface{}{
"Temperature": sensor_data["Temperature"],
"Humidity": sensor_data["Humidity"],
"DewPoint": sensor_data["DewPoint"],
}
err = writeAPI.WritePoint(
context.Background(),
influxdb2.NewPoint(
"tasmota",
map[string]string{
"device": device,
},
relevant_values,
time.Now(),
),
)
if err != nil {
log.Printf("Failed to write point: %s", err)
}
}
}()
log.Printf(" [*] Waiting for logs. To exit press CTRL+C")
<-forever
}