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prometheus: Expose device name as part of device info 

The device name can be useful to identify a particular instance in
Prometheus.

Example:

```
tasmota_info{...,devicename="livingroom"} 1
```

Signed-off-by: Michael Hanselmann <public@hansmi.ch>
This commit is contained in:
Michael Hanselmann 2021-07-11 20:15:01 +02:00
parent 9e441630f1
commit 16b5f2fe92
1 changed files with 12 additions and 2 deletions
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14
tasmota/xsns_75_prometheus.ino
View File

@ -74,6 +74,16 @@ String FormatMetricName(const char *metric) {
return formatted;
}
// Labels can be any sequence of UTF-8 characters, but backslash, double-quote
// and line feed must be escaped.
String FormatLabelValue(const char *value) {
String formatted = value;
formatted.replace("\\", "\\\\");
formatted.replace("\"", "\\\"");
formatted.replace("\n", "\\n");
return formatted;
}
void HandleMetrics(void) {
if (!HttpCheckPriviledgedAccess()) { return; }
@ -84,8 +94,8 @@ void HandleMetrics(void) {
char parameter[FLOATSZ];
// Pseudo-metric providing metadata about the running firmware version.
WSContentSend_P(PSTR("# TYPE tasmota_info gauge\ntasmota_info{version=\"%s\",image=\"%s\",build_timestamp=\"%s\"} 1\n"),
TasmotaGlobal.version, TasmotaGlobal.image_name, GetBuildDateAndTime().c_str());
WSContentSend_P(PSTR("# TYPE tasmota_info gauge\ntasmota_info{version=\"%s\",image=\"%s\",build_timestamp=\"%s\",devicename=\"%s\"} 1\n"),
TasmotaGlobal.version, TasmotaGlobal.image_name, GetBuildDateAndTime().c_str(), FormatLabelValue(SettingsText(SET_DEVICENAME)).c_str());
WSContentSend_P(PSTR("# TYPE tasmota_uptime_seconds gauge\ntasmota_uptime_seconds %d\n"), TasmotaGlobal.uptime);
WSContentSend_P(PSTR("# TYPE tasmota_boot_count counter\ntasmota_boot_count %d\n"), Settings->bootcount);
WSContentSend_P(PSTR("# TYPE tasmota_flash_writes_total counter\ntasmota_flash_writes_total %d\n"), Settings->save_flag);