prometheus-node-exporter-lua: make it modular
As prometheus-node-exporter-lua is a reimplementation of node_exporter, I'm using "collector" instead of "scraper" and renaming some collectors put each collector in a separate file report collector success/failure and duration per scrape (follow https://github.com/prometheus/node_exporter/pull/516) allow to filter collectors using "collect[]" params (see https://github.com/prometheus/node_exporter#filtering-enabled-collectors) Signed-off-by: Etienne Champetier <champetier.etienne@gmail.com>
This commit is contained in:
Etienne Champetier
parent
7b1b69ca6c
commit
32e1baeddd
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@ -40,6 +40,8 @@ define Package/prometheus-node-exporter-lua/install
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$(INSTALL_BIN) ./files/etc/init.d/prometheus-node-exporter-lua $(1)/etc/init.d/prometheus-node-exporter-lua
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$(INSTALL_DIR) $(1)/usr/bin
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$(INSTALL_BIN) ./files/usr/bin/prometheus-node-exporter-lua $(1)/usr/bin/prometheus-node-exporter-lua
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$(INSTALL_DIR) $(1)/usr/lib/lua/prometheus-collectors
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$(INSTALL_BIN) ./files/usr/lib/lua/prometheus-collectors/* $(1)/usr/lib/lua/prometheus-collectors/
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endef
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$(eval $(call BuildPackage,prometheus-node-exporter-lua))
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@ -11,11 +11,6 @@ socket = require("socket")
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-- Allow us to call unpack under both lua5.1 and lua5.2+
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local unpack = unpack or table.unpack
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-- This table defines the scrapers to run.
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-- Each corresponds directly to a scraper_<name> function.
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scrapers = { "cpu", "load_averages", "memory", "file_handles", "network",
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"network_devices", "time", "uname", "nat", "wifi"}
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-- Parsing
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function space_split(s)
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@ -69,249 +64,27 @@ function metric(name, mtype, labels, value)
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return outputter
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end
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local ubus = require "ubus"
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local iwinfo = require "iwinfo"
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function scraper_wifi()
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local metric_wifi_network_quality = metric("wifi_network_quality","gauge")
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local metric_wifi_network_bitrate = metric("wifi_network_bitrate","gauge")
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local metric_wifi_network_noise = metric("wifi_network_noise","gauge")
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local metric_wifi_network_signal = metric("wifi_network_signal","gauge")
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local metric_wifi_station_signal = metric("wifi_station_signal","gauge")
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local metric_wifi_station_tx_packets = metric("wifi_station_tx_packets","gauge")
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local metric_wifi_station_rx_packets = metric("wifi_station_rx_packets","gauge")
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local u = ubus.connect()
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local status = u:call("network.wireless", "status", {})
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for dev, dev_table in pairs(status) do
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for _, intf in ipairs(dev_table['interfaces']) do
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local ifname = intf['ifname']
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local iw = iwinfo[iwinfo.type(ifname)]
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local labels = {
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channel = iw.channel(ifname),
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ssid = iw.ssid(ifname),
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bssid = iw.bssid(ifname),
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mode = iw.mode(ifname),
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ifname = ifname,
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country = iw.country(ifname),
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frequency = iw.frequency(ifname),
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device = dev,
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}
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local qc = iw.quality(ifname) or 0
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local qm = iw.quality_max(ifname) or 0
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local quality = 0
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if qc > 0 and qm > 0 then
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quality = math.floor((100 / qm) * qc)
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end
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metric_wifi_network_quality(labels, quality)
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metric_wifi_network_noise(labels, iw.noise(ifname) or 0)
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metric_wifi_network_bitrate(labels, iw.bitrate(ifname) or 0)
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metric_wifi_network_signal(labels, iw.signal(ifname) or -255)
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local assoclist = iw.assoclist(ifname)
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for mac, station in pairs(assoclist) do
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local labels = {
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ifname = ifname,
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mac = mac,
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}
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metric_wifi_station_signal(labels, station.signal)
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metric_wifi_station_tx_packets(labels, station.tx_packets)
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metric_wifi_station_rx_packets(labels, station.rx_packets)
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end
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end
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end
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end
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function scraper_cpu()
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local stat = get_contents("/proc/stat")
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-- system boot time, seconds since epoch
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metric("node_boot_time", "gauge", nil, string.match(stat, "btime ([0-9]+)"))
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-- context switches since boot (all CPUs)
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metric("node_context_switches", "counter", nil, string.match(stat, "ctxt ([0-9]+)"))
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-- cpu times, per CPU, per mode
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local cpu_mode = {"user", "nice", "system", "idle", "iowait", "irq",
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"softirq", "steal", "guest", "guest_nice"}
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local i = 0
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local cpu_metric = metric("node_cpu", "counter")
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while string.match(stat, string.format("cpu%d ", i)) do
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local cpu = space_split(string.match(stat, string.format("cpu%d ([0-9 ]+)", i)))
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local labels = {cpu = "cpu" .. i}
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for ii, mode in ipairs(cpu_mode) do
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labels['mode'] = mode
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cpu_metric(labels, cpu[ii] / 100)
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end
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i = i + 1
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end
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-- interrupts served
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metric("node_intr", "counter", nil, string.match(stat, "intr ([0-9]+)"))
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-- processes forked
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metric("node_forks", "counter", nil, string.match(stat, "processes ([0-9]+)"))
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-- processes running
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metric("node_procs_running", "gauge", nil, string.match(stat, "procs_running ([0-9]+)"))
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-- processes blocked for I/O
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metric("node_procs_blocked", "gauge", nil, string.match(stat, "procs_blocked ([0-9]+)"))
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end
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function scraper_load_averages()
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local loadavg = space_split(get_contents("/proc/loadavg"))
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metric("node_load1", "gauge", nil, loadavg[1])
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metric("node_load5", "gauge", nil, loadavg[2])
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metric("node_load15", "gauge", nil, loadavg[3])
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end
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function scraper_memory()
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local meminfo = line_split(get_contents("/proc/meminfo"):gsub("[):]", ""):gsub("[(]", "_"))
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for i, mi in ipairs(meminfo) do
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local name, size, unit = unpack(space_split(mi))
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if unit == 'kB' then
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size = size * 1024
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end
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metric("node_memory_" .. name, "gauge", nil, size)
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end
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end
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function scraper_file_handles()
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local file_nr = space_split(get_contents("/proc/sys/fs/file-nr"))
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metric("node_filefd_allocated", "gauge", nil, file_nr[1])
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metric("node_filefd_maximum", "gauge", nil, file_nr[3])
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end
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function scraper_network()
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-- NOTE: Both of these are missing in OpenWRT kernels.
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-- See: https://dev.openwrt.org/ticket/15781
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local netstat = get_contents("/proc/net/netstat") .. get_contents("/proc/net/snmp")
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-- all devices
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local netsubstat = {"IcmpMsg", "Icmp", "IpExt", "Ip", "TcpExt", "Tcp", "UdpLite", "Udp"}
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for i, nss in ipairs(netsubstat) do
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local substat_s = string.match(netstat, nss .. ": ([A-Z][A-Za-z0-9 ]+)")
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if substat_s then
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local substat = space_split(substat_s)
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local substatv = space_split(string.match(netstat, nss .. ": ([0-9 -]+)"))
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for ii, ss in ipairs(substat) do
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metric("node_netstat_" .. nss .. "_" .. ss, "gauge", nil, substatv[ii])
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end
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end
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end
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end
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function scraper_network_devices()
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local netdevstat = line_split(get_contents("/proc/net/dev"))
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local netdevsubstat = {"receive_bytes", "receive_packets", "receive_errs",
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"receive_drop", "receive_fifo", "receive_frame", "receive_compressed",
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"receive_multicast", "transmit_bytes", "transmit_packets",
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"transmit_errs", "transmit_drop", "transmit_fifo", "transmit_colls",
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"transmit_carrier", "transmit_compressed"}
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for i, line in ipairs(netdevstat) do
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netdevstat[i] = string.match(netdevstat[i], "%S.*")
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end
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local nds_table = {}
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local devs = {}
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for i, nds in ipairs(netdevstat) do
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local dev, stat_s = string.match(netdevstat[i], "([^:]+): (.*)")
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if dev then
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nds_table[dev] = space_split(stat_s)
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table.insert(devs, dev)
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end
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end
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for i, ndss in ipairs(netdevsubstat) do
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netdev_metric = metric("node_network_" .. ndss, "gauge")
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for ii, d in ipairs(devs) do
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netdev_metric({device=d}, nds_table[d][i])
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end
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end
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end
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function scraper_time()
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-- current time
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metric("node_time", "counter", nil, os.time())
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end
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uname_labels = {
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domainname = "",
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nodename = "",
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release = string.sub(get_contents("/proc/sys/kernel/osrelease"), 1, -2),
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sysname = string.sub(get_contents("/proc/sys/kernel/ostype"), 1, -2),
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version = string.sub(get_contents("/proc/sys/kernel/version"), 1, -2),
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machine = string.sub(io.popen("uname -m"):read("*a"), 1, -2)
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}
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function scraper_uname()
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uname_labels["domainname"] = string.sub(get_contents("/proc/sys/kernel/domainname"), 1, -2)
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uname_labels["nodename"] = string.sub(get_contents("/proc/sys/kernel/hostname"), 1, -2)
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metric("node_uname_info", "gauge", uname_labels, 1)
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end
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function scraper_nat()
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-- documetation about nf_conntrack:
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-- https://www.frozentux.net/iptables-tutorial/chunkyhtml/x1309.html
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local natstat = line_split(get_contents("/proc/net/nf_conntrack"))
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nat_metric = metric("node_nat_traffic", "gauge" )
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for i, e in ipairs(natstat) do
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-- output(string.format("%s\n",e ))
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local fields = space_split(e)
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local src, dest, bytes;
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bytes = 0;
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for ii, field in ipairs(fields) do
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if src == nil and string.match(field, '^src') then
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src = string.match(field,"src=([^ ]+)");
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elseif dest == nil and string.match(field, '^dst') then
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dest = string.match(field,"dst=([^ ]+)");
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elseif string.match(field, '^bytes') then
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local b = string.match(field, "bytes=([^ ]+)");
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bytes = bytes + b;
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-- output(string.format("\t%d %s",ii,field ));
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end
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end
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-- local src, dest, bytes = string.match(natstat[i], "src=([^ ]+) dst=([^ ]+) .- bytes=([^ ]+)");
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-- local src, dest, bytes = string.match(natstat[i], "src=([^ ]+) dst=([^ ]+) sport=[^ ]+ dport=[^ ]+ packets=[^ ]+ bytes=([^ ]+)")
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local labels = { src = src, dest = dest }
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-- output(string.format("src=|%s| dest=|%s| bytes=|%s|", src, dest, bytes ))
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nat_metric(labels, bytes )
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end
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end
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function timed_scrape(scraper)
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function timed_scrape(collector)
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local start_time = socket.gettime()
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-- build the function name and call it from global variable table
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_G["scraper_"..scraper]()
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local duration = socket.gettime() - start_time
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return duration
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local success = 1
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local status, err = pcall(collector.scrape)
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if not status then
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success = 0
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print(err)
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end
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return (socket.gettime() - start_time), success
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end
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function run_all_scrapers()
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times = {}
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for i,scraper in ipairs(scrapers) do
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runtime = timed_scrape(scraper)
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times[scraper] = runtime
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scrape_time_sums[scraper] = scrape_time_sums[scraper] + runtime
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scrape_counts[scraper] = scrape_counts[scraper] + 1
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function run_all_collectors(collectors)
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local metric_duration = metric("node_scrape_collector_duration_seconds", "gauge")
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local metric_success = metric("node_scrape_collector_success", "gauge")
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for _,cname in pairs(collectors) do
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if col_mods[cname] ~= nil then
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local duration, success = timed_scrape(col_mods[cname])
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local labels = {collector=cname}
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metric_duration(labels, duration)
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metric_success(labels, success)
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end
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local name = "node_exporter_scrape_duration_seconds"
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local duration_metric = metric(name, "summary")
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for i,scraper in ipairs(scrapers) do
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local labels = {collector=scraper, result="success"}
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duration_metric(labels, times[scraper])
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print_metric(name.."_sum", labels, scrape_time_sums[scraper])
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print_metric(name.."_count", labels, scrape_counts[scraper])
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end
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end
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@ -326,11 +99,19 @@ function http_not_found()
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end
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function serve(request)
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if not string.match(request, "GET /metrics.*") then
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local q = request:match("^GET /metrics%??([^ ]*) HTTP/1%.[01]$")
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if q == nil then
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http_not_found()
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else
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http_ok_header()
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run_all_scrapers()
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local cols = {}
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for c in q:gmatch("collect[^=]*=([^&]+)") do
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cols[#cols+1] = c
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end
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if #cols == 0 then
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cols = col_names
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end
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run_all_collectors(cols)
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end
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client:close()
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return true
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@ -347,11 +128,12 @@ for k,v in ipairs(arg) do
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end
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end
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scrape_counts = {}
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scrape_time_sums = {}
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for i,scraper in ipairs(scrapers) do
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scrape_counts[scraper] = 0
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scrape_time_sums[scraper] = 0
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col_mods = {}
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col_names = {}
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for c in io.popen("ls -1 /usr/lib/lua/prometheus-collectors/*.lua"):lines() do
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c = c:match("([^/]+)%.lua$")
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col_mods[c] = require('prometheus-collectors.'..c)
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col_names[#col_names+1] = c
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end
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if port then
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@ -371,5 +153,5 @@ if port then
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end
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else
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output = print
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run_all_scrapers()
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run_all_collectors(col_names)
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end
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@ -0,0 +1,39 @@
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-- stat/cpu collector
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local function scrape()
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local stat = get_contents("/proc/stat")
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-- system boot time, seconds since epoch
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metric("node_boot_time", "gauge", nil, string.match(stat, "btime ([0-9]+)"))
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-- context switches since boot (all CPUs)
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metric("node_context_switches", "counter", nil, string.match(stat, "ctxt ([0-9]+)"))
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-- cpu times, per CPU, per mode
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local cpu_mode = {"user", "nice", "system", "idle", "iowait", "irq",
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"softirq", "steal", "guest", "guest_nice"}
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local i = 0
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local cpu_metric = metric("node_cpu", "counter")
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while string.match(stat, string.format("cpu%d ", i)) do
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local cpu = space_split(string.match(stat, string.format("cpu%d ([0-9 ]+)", i)))
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local labels = {cpu = "cpu" .. i}
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for ii, mode in ipairs(cpu_mode) do
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labels['mode'] = mode
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cpu_metric(labels, cpu[ii] / 100)
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end
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i = i + 1
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end
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-- interrupts served
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metric("node_intr", "counter", nil, string.match(stat, "intr ([0-9]+)"))
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-- processes forked
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metric("node_forks", "counter", nil, string.match(stat, "processes ([0-9]+)"))
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-- processes running
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metric("node_procs_running", "gauge", nil, string.match(stat, "procs_running ([0-9]+)"))
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-- processes blocked for I/O
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metric("node_procs_blocked", "gauge", nil, string.match(stat, "procs_blocked ([0-9]+)"))
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end
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return { scrape = scrape }
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@ -0,0 +1,8 @@
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local function scrape()
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local file_nr = space_split(get_contents("/proc/sys/fs/file-nr"))
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metric("node_filefd_allocated", "gauge", nil, file_nr[1])
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metric("node_filefd_maximum", "gauge", nil, file_nr[3])
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end
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return { scrape = scrape }
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@ -0,0 +1,9 @@
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local function scrape()
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local loadavg = space_split(get_contents("/proc/loadavg"))
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metric("node_load1", "gauge", nil, loadavg[1])
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metric("node_load5", "gauge", nil, loadavg[2])
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metric("node_load15", "gauge", nil, loadavg[3])
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end
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return { scrape = scrape }
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@ -0,0 +1,13 @@
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local function scrape()
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local meminfo = line_split(get_contents("/proc/meminfo"):gsub("[):]", ""):gsub("[(]", "_"))
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for i, mi in ipairs(meminfo) do
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local name, size, unit = unpack(space_split(mi))
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if unit == 'kB' then
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size = size * 1024
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end
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metric("node_memory_" .. name, "gauge", nil, size)
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end
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end
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return { scrape = scrape }
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@ -0,0 +1,33 @@
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local function scrape()
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-- documetation about nf_conntrack:
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||||
-- https://www.frozentux.net/iptables-tutorial/chunkyhtml/x1309.html
|
||||
local natstat = line_split(get_contents("/proc/net/nf_conntrack"))
|
||||
|
||||
nat_metric = metric("node_nat_traffic", "gauge" )
|
||||
for i, e in ipairs(natstat) do
|
||||
-- output(string.format("%s\n",e ))
|
||||
local fields = space_split(e)
|
||||
local src, dest, bytes;
|
||||
bytes = 0;
|
||||
for ii, field in ipairs(fields) do
|
||||
if src == nil and string.match(field, '^src') then
|
||||
src = string.match(field,"src=([^ ]+)");
|
||||
elseif dest == nil and string.match(field, '^dst') then
|
||||
dest = string.match(field,"dst=([^ ]+)");
|
||||
elseif string.match(field, '^bytes') then
|
||||
local b = string.match(field, "bytes=([^ ]+)");
|
||||
bytes = bytes + b;
|
||||
-- output(string.format("\t%d %s",ii,field ));
|
||||
end
|
||||
|
||||
end
|
||||
-- local src, dest, bytes = string.match(natstat[i], "src=([^ ]+) dst=([^ ]+) .- bytes=([^ ]+)");
|
||||
-- local src, dest, bytes = string.match(natstat[i], "src=([^ ]+) dst=([^ ]+) sport=[^ ]+ dport=[^ ]+ packets=[^ ]+ bytes=([^ ]+)")
|
||||
|
||||
local labels = { src = src, dest = dest }
|
||||
-- output(string.format("src=|%s| dest=|%s| bytes=|%s|", src, dest, bytes ))
|
||||
nat_metric(labels, bytes )
|
||||
end
|
||||
end
|
||||
|
||||
return { scrape = scrape }
|
||||
|
|
@ -0,0 +1,28 @@
|
|||
local function scrape()
|
||||
local netdevstat = line_split(get_contents("/proc/net/dev"))
|
||||
local netdevsubstat = {"receive_bytes", "receive_packets", "receive_errs",
|
||||
"receive_drop", "receive_fifo", "receive_frame", "receive_compressed",
|
||||
"receive_multicast", "transmit_bytes", "transmit_packets",
|
||||
"transmit_errs", "transmit_drop", "transmit_fifo", "transmit_colls",
|
||||
"transmit_carrier", "transmit_compressed"}
|
||||
for i, line in ipairs(netdevstat) do
|
||||
netdevstat[i] = string.match(netdevstat[i], "%S.*")
|
||||
end
|
||||
local nds_table = {}
|
||||
local devs = {}
|
||||
for i, nds in ipairs(netdevstat) do
|
||||
local dev, stat_s = string.match(netdevstat[i], "([^:]+): (.*)")
|
||||
if dev then
|
||||
nds_table[dev] = space_split(stat_s)
|
||||
table.insert(devs, dev)
|
||||
end
|
||||
end
|
||||
for i, ndss in ipairs(netdevsubstat) do
|
||||
netdev_metric = metric("node_network_" .. ndss, "gauge")
|
||||
for ii, d in ipairs(devs) do
|
||||
netdev_metric({device=d}, nds_table[d][i])
|
||||
end
|
||||
end
|
||||
end
|
||||
|
||||
return { scrape = scrape }
|
||||
|
|
@ -0,0 +1,20 @@
|
|||
local function scrape()
|
||||
-- NOTE: Both of these are missing in OpenWRT kernels.
|
||||
-- See: https://dev.openwrt.org/ticket/15781
|
||||
local netstat = get_contents("/proc/net/netstat") .. get_contents("/proc/net/snmp")
|
||||
|
||||
-- all devices
|
||||
local netsubstat = {"IcmpMsg", "Icmp", "IpExt", "Ip", "TcpExt", "Tcp", "UdpLite", "Udp"}
|
||||
for i, nss in ipairs(netsubstat) do
|
||||
local substat_s = string.match(netstat, nss .. ": ([A-Z][A-Za-z0-9 ]+)")
|
||||
if substat_s then
|
||||
local substat = space_split(substat_s)
|
||||
local substatv = space_split(string.match(netstat, nss .. ": ([0-9 -]+)"))
|
||||
for ii, ss in ipairs(substat) do
|
||||
metric("node_netstat_" .. nss .. "_" .. ss, "gauge", nil, substatv[ii])
|
||||
end
|
||||
end
|
||||
end
|
||||
end
|
||||
|
||||
return { scrape = scrape }
|
||||
|
|
@ -0,0 +1,6 @@
|
|||
local function scrape()
|
||||
-- current time
|
||||
metric("node_time", "counter", nil, os.time())
|
||||
end
|
||||
|
||||
return { scrape = scrape }
|
||||
|
|
@ -0,0 +1,16 @@
|
|||
local labels = {
|
||||
domainname = "",
|
||||
nodename = "",
|
||||
release = string.sub(get_contents("/proc/sys/kernel/osrelease"), 1, -2),
|
||||
sysname = string.sub(get_contents("/proc/sys/kernel/ostype"), 1, -2),
|
||||
version = string.sub(get_contents("/proc/sys/kernel/version"), 1, -2),
|
||||
machine = string.sub(io.popen("uname -m"):read("*a"), 1, -2)
|
||||
}
|
||||
|
||||
local function scrape()
|
||||
labels["domainname"] = string.sub(get_contents("/proc/sys/kernel/domainname"), 1, -2)
|
||||
labels["nodename"] = string.sub(get_contents("/proc/sys/kernel/hostname"), 1, -2)
|
||||
metric("node_uname_info", "gauge", labels, 1)
|
||||
end
|
||||
|
||||
return { scrape = scrape }
|
||||
|
|
@ -0,0 +1,58 @@
|
|||
local ubus = require "ubus"
|
||||
local iwinfo = require "iwinfo"
|
||||
|
||||
local function scrape()
|
||||
local metric_wifi_network_quality = metric("wifi_network_quality","gauge")
|
||||
local metric_wifi_network_bitrate = metric("wifi_network_bitrate","gauge")
|
||||
local metric_wifi_network_noise = metric("wifi_network_noise","gauge")
|
||||
local metric_wifi_network_signal = metric("wifi_network_signal","gauge")
|
||||
|
||||
local metric_wifi_station_signal = metric("wifi_station_signal","gauge")
|
||||
local metric_wifi_station_tx_packets = metric("wifi_station_tx_packets","gauge")
|
||||
local metric_wifi_station_rx_packets = metric("wifi_station_rx_packets","gauge")
|
||||
|
||||
local u = ubus.connect()
|
||||
local status = u:call("network.wireless", "status", {})
|
||||
|
||||
for dev, dev_table in pairs(status) do
|
||||
for _, intf in ipairs(dev_table['interfaces']) do
|
||||
local ifname = intf['ifname']
|
||||
local iw = iwinfo[iwinfo.type(ifname)]
|
||||
local labels = {
|
||||
channel = iw.channel(ifname),
|
||||
ssid = iw.ssid(ifname),
|
||||
bssid = iw.bssid(ifname),
|
||||
mode = iw.mode(ifname),
|
||||
ifname = ifname,
|
||||
country = iw.country(ifname),
|
||||
frequency = iw.frequency(ifname),
|
||||
device = dev,
|
||||
}
|
||||
|
||||
local qc = iw.quality(ifname) or 0
|
||||
local qm = iw.quality_max(ifname) or 0
|
||||
local quality = 0
|
||||
if qc > 0 and qm > 0 then
|
||||
quality = math.floor((100 / qm) * qc)
|
||||
end
|
||||
|
||||
metric_wifi_network_quality(labels, quality)
|
||||
metric_wifi_network_noise(labels, iw.noise(ifname) or 0)
|
||||
metric_wifi_network_bitrate(labels, iw.bitrate(ifname) or 0)
|
||||
metric_wifi_network_signal(labels, iw.signal(ifname) or -255)
|
||||
|
||||
local assoclist = iw.assoclist(ifname)
|
||||
for mac, station in pairs(assoclist) do
|
||||
local labels = {
|
||||
ifname = ifname,
|
||||
mac = mac,
|
||||
}
|
||||
metric_wifi_station_signal(labels, station.signal)
|
||||
metric_wifi_station_tx_packets(labels, station.tx_packets)
|
||||
metric_wifi_station_rx_packets(labels, station.rx_packets)
|
||||
end
|
||||
end
|
||||
end
|
||||
end
|
||||
|
||||
return { scrape = scrape }
|
||||
Loading…
Reference in New Issue