add sensors to lua prometheus exporter

1 files changed, 26 insertions, 0 deletions

diff --git a/files/common/openwrt/sensors_promethues-node-exporter.lua b/files/common/openwrt/sensors_promethues-node-exporter.lua
new file mode 100644
index 00000000..9c814659
--- /dev/null
+++ b/files/common/openwrt/sensors_promethues-node-exporter.lua
@@ -0,0 +1,26 @@
+local sensors = require "sensors"
+
+local config, _ = sensors.read_config('/etc/sensors.json')
+sensors.setup(config)
+local units = {
+    temperature = "celsius",
+    humidity = "percent",
+    pressure = "bar",
+}
+
+local function scrape()
+    local readings, err = sensors.read(config)
+    if not readings then return end
+
+    for name, values in pairs(readings) do
+        labels = { name = name, kind = values._kind_ }
+        for t, v in pairs(values) do
+            local unit = units[t]
+            if unit ~= nil then
+                metric("sensors_" .. t .. "_" .. unit, "gauge", labels, v)
+            end
+        end
+    end
+end
+
+return { scrape = scrape }