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prometheus-node-exporter-lua: add netclass.lua collector

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All current node_exporter netclass metrics will be available. This includes
speed metrics per lan port on supported DSA switches.

Signed-off-by: René Treffer <treffer@measite.de>
(cherry picked from commit a315c40b72)
This commit is contained in:
René Treffer 2022-03-28 08:14:04 +02:00 committed by Etienne Champetier
parent 3aaf332420
commit a7110baf4c
2 changed files with 78 additions and 0 deletions
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1
utils/prometheus-node-exporter-lua/Makefile
View file

@ -43,6 +43,7 @@ define Package/prometheus-node-exporter-lua/install
$(INSTALL_BIN) ./files/usr/lib/lua/prometheus-collectors/netdev.lua $(1)/usr/lib/lua/prometheus-collectors/
$(INSTALL_BIN) ./files/usr/lib/lua/prometheus-collectors/time.lua $(1)/usr/lib/lua/prometheus-collectors/
$(INSTALL_BIN) ./files/usr/lib/lua/prometheus-collectors/uname.lua $(1)/usr/lib/lua/prometheus-collectors/
$(INSTALL_BIN) ./files/usr/lib/lua/prometheus-collectors/netclass.lua $(1)/usr/lib/lua/prometheus-collectors/
endef
define Package/prometheus-node-exporter-lua/conffiles

77
utils/prometheus-node-exporter-lua/files/usr/lib/lua/prometheus-collectors/netclass.lua Normal file
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@ -0,0 +1,77 @@
local ubus = require "ubus"
-- reference/further reading:
-- - node_exporter netclass_linux (upstream metrics): https://github.com/prometheus/node_exporter/blob/master/collector/netclass_linux.go
-- - relevant sysfs files: https://github.com/prometheus/procfs/blob/5f46783c017ef6a934fc8cfa6d1a2206db21401b/sysfs/net_class.go#L121
-- - 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
local function get_devices() -- based on hostapd_stations.lua
local u = ubus.connect()
local status = u:call("network.device", "status", {})
local devices = {}
for dev, dev_table in pairs(status) do
table.insert(devices, dev)
end
return devices
end
local function load(device, file) -- load a single sysfs file, trim trailing newline, return nil on error
local success, data = pcall(function () return string.gsub(get_contents("/sys/class/net/" .. device .. "/" .. file), "\n$", "") end)
if success then
return data
else
return nil
end
end
local function file_gauge(name, device, file)
local value = load(device, file)
if value ~= nil then
metric("node_network_" .. name, "gauge", {device = device}, tonumber(value))
end
end
local function file_counter(name, device, file)
local value = load(device, file)
if value ~= nil then
metric("node_network_" .. name, "counter", {device = device}, tonumber(value))
end
end
local function get_metric(device)
local address = load(device, "address")
local broadcast = load(device, "broadcast")
local duplex = load(device, "duplex")
local operstate = load(device, "operstate")
local ifalias = load(device, "ifalias")
metric("node_network_info", "gauge", {device = device, address = address, broadcast = broadcast, duplex = duplex, operstate = operstate, ifalias = ifalias}, 1)
file_gauge("address_assign_type", device, "addr_assign_type")
file_gauge("carrier", device, "carrier")
file_counter("carrier_changes_total", device, "carrier_changes")
file_counter("carrier_up_changes_total", device, "carrier_up_count")
file_counter("carrier_down_changes_total", device, "carrier_down_count")
file_gauge("device_id", device, "dev_id")
file_gauge("dormant", device, "dormant")
file_gauge("flags", device, "flags")
file_gauge("iface_id", device, "ifindex")
file_gauge("iface_link", device, "iflink")
file_gauge("iface_link_mode", device, "link_mode")
file_gauge("mtu_bytes", device, "mtu")
file_gauge("name_assign_type", device, "name_assign_type")
file_gauge("net_dev_group", device, "netdev_group")
file_gauge("transmit_queue_length", device, "tx_queue_len")
file_gauge("protocol_type", device, "type")
local speed = load(device, "speed")
if speed ~= nil and tonumber(speed) >= 0 then
metric("node_network_speed_bytes", "gauge", {device = device}, tonumber(speed)*1000*1000/8)
end
end
local function scrape()
for _, devicename in ipairs(get_devices()) do
get_metric(devicename)
end
end
return { scrape = scrape }