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local ubus = require "ubus" |
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-- reference/further reading: |
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-- - node_exporter netclass_linux (upstream metrics): https://github.com/prometheus/node_exporter/blob/master/collector/netclass_linux.go |
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-- - relevant sysfs files: https://github.com/prometheus/procfs/blob/5f46783c017ef6a934fc8cfa6d1a2206db21401b/sysfs/net_class.go#L121 |
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-- - get devices / read files: https://github.com/openwrt/packages/blob/openwrt-21.02/utils/prometheus-node-exporter-lua/files/usr/lib/lua/prometheus-collectors/snmp6.lua |
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local function get_devices() -- based on hostapd_stations.lua |
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local u = ubus.connect() |
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local status = u:call("network.device", "status", {}) |
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local devices = {} |
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for dev, dev_table in pairs(status) do |
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table.insert(devices, dev) |
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end |
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return devices |
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end |
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local function load(device, file) -- load a single sysfs file, trim trailing newline, return nil on error |
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local success, data = pcall(function () return string.gsub(get_contents("/sys/class/net/" .. device .. "/" .. file), "\n$", "") end) |
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if success then |
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return data |
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else |
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return nil |
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end |
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end |
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local function file_gauge(name, device, file) |
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local value = load(device, file) |
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if value ~= nil then |
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metric("node_network_" .. name, "gauge", {device = device}, tonumber(value)) |
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end |
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end |
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local function file_counter(name, device, file) |
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local value = load(device, file) |
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if value ~= nil then |
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metric("node_network_" .. name, "counter", {device = device}, tonumber(value)) |
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end |
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end |
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local function get_metric(device) |
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local address = load(device, "address") |
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local broadcast = load(device, "broadcast") |
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local duplex = load(device, "duplex") |
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local operstate = load(device, "operstate") |
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local ifalias = load(device, "ifalias") |
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metric("node_network_info", "gauge", {device = device, address = address, broadcast = broadcast, duplex = duplex, operstate = operstate, ifalias = ifalias}, 1) |
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file_gauge("address_assign_type", device, "addr_assign_type") |
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file_gauge("carrier", device, "carrier") |
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file_counter("carrier_changes_total", device, "carrier_changes") |
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file_counter("carrier_up_changes_total", device, "carrier_up_count") |
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file_counter("carrier_down_changes_total", device, "carrier_down_count") |
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file_gauge("device_id", device, "dev_id") |
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file_gauge("dormant", device, "dormant") |
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file_gauge("flags", device, "flags") |
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file_gauge("iface_id", device, "ifindex") |
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file_gauge("iface_link", device, "iflink") |
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file_gauge("iface_link_mode", device, "link_mode") |
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file_gauge("mtu_bytes", device, "mtu") |
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file_gauge("name_assign_type", device, "name_assign_type") |
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file_gauge("net_dev_group", device, "netdev_group") |
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file_gauge("transmit_queue_length", device, "tx_queue_len") |
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file_gauge("protocol_type", device, "type") |
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local speed = load(device, "speed") |
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if speed ~= nil and tonumber(speed) >= 0 then |
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metric("node_network_speed_bytes", "gauge", {device = device}, tonumber(speed)*1000*1000/8) |
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end |
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end |
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local function scrape() |
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for _, devicename in ipairs(get_devices()) do |
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get_metric(devicename) |
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end |
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end |
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return { scrape = scrape } |