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Added functionality to expose prometheus metrics #377

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Added functionality to expose prometheus metrics #377

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23 changes: 23 additions & 0 deletions src/BrewPiLess.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -175,6 +175,10 @@ extern "C" {

#define HUMIDITY_CONTROL_PATH "/rh"

#ifdef METRICS
#define METRICS_PATH "/metrics"
#endif

const char *public_list[]={
"/bwf.js",
"/brewing.json"
Expand Down Expand Up @@ -607,6 +611,22 @@ class BrewPiWebHandler: public AsyncWebHandler
+String("}");
request->send(200,"application/json",json);
}
#ifdef METRICS
else if (request->method() == HTTP_GET && request->url() == METRICS_PATH){
uint8_t mode, state;
float beerSet, beerTemp, fridgeTemp, fridgeSet, roomTemp;
brewPi.getAllStatus(&state, &mode, &beerTemp, &beerSet, &fridgeTemp, &fridgeSet, &roomTemp);
#define TEMPor0(a) (IS_FLOAT_TEMP_VALID(a)? String(a):String("0"))
String instance_string = String("{instance=\"" + String(syscfg->titlelabel) + "\"} ");
String body =
String("brewpi_beer_temp" + instance_string + TEMPor0(beerTemp) + "\n") +
String("brewpi_beer_set" + instance_string + TEMPor0(beerSet) + "\n") +
String("brewpi_fridge_temp" + instance_string + TEMPor0(fridgeTemp) + "\n") +
String("brewpi_fridge_set" + instance_string + TEMPor0(fridgeSet) + "\n") +
String("brewpi_room_temp" + instance_string + TEMPor0(roomTemp) + "\n");
request->send(200,"text/plain",body);
}
#endif
#ifdef ENABLE_LOGGING
else if (request->url() == LOGGING_PATH){
if(request->method() == HTTP_POST){
Expand Down Expand Up @@ -783,6 +803,9 @@ class BrewPiWebHandler: public AsyncWebHandler
|| request->url() == GETSTATUS_PATH
|| request->url() == BEER_PROFILE_PATH
|| request->url() == MQTT_PATH
#ifdef METRICS
|| request->url() == METRICS_PATH
#endif
#ifdef ENABLE_LOGGING
|| request->url() == LOGGING_PATH
#endif
Expand Down
3 changes: 3 additions & 0 deletions src/Config.h
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Original file line number Diff line number Diff line change
Expand Up @@ -644,6 +644,9 @@
#define FileSystem SPIFFS
#endif

#ifndef METRICS
#define METRICS true
#endif

#if ESP32
// when read logs, ESP32, or AsyncTCP to be exact, would request 5623 bytes
Expand Down