prometheus-node-exporter-lua-wan

upstream.lua

#!/usr/bin/lua

# /usr/lib/lua/prometheus-collectors/upstream.lua

local ubus = require "ubus"

local function scrape()
  local metric_wan_interface = metric("wan_interface_uptime", "gauge", "WAN interface uptime")

  local u = ubus.connect()
  local network_data = u:call("network.interface", "dump", {})

  for _, interface in ipairs(network_data.interface) do
    local is_wan = false
    local ipv4 = interface["ipv4-address"][1]
    local ipv6 = interface["ipv6-address"][1]

    for _, route in pairs(interface.route or {}) do
      if route.target == "0.0.0.0" and route.mask == 0 then
        is_wan = true
        break
      end

      if route.target == "::" and route.mask == 0 then
        is_wan = true
        break
      end
    end

    if is_wan then
      metric_wan_interface(
        { 
          name = interface.interface,
          proto = interface.proto or "unknown",
          device = interface.l3_device or interface.device,
          ipv4 = ipv4 and ipv4.address,
          ipv4_mask = ipv4 and ipv4.mask,
          ipv6 = ipv6 and ipv6.address,
          ipv6_mask = ipv6 and ipv6.mask,
        }, 
        interface.uptime
      )
    end
  end
end

return { scrape = scrape }

omg