- -- stat/cpu collector
- local function scrape()
- local stat = get_contents("/proc/stat")
-
- -- system boot time, seconds since epoch
- metric("node_boot_time_seconds", "gauge", nil,
- string.match(stat, "btime ([0-9]+)"))
-
- -- context switches since boot (all CPUs)
- metric("node_context_switches_total", "counter", nil,
- string.match(stat, "ctxt ([0-9]+)"))
-
- -- cpu times, per CPU, per mode
- local cpu_mode = {"user", "nice", "system", "idle", "iowait", "irq",
- "softirq", "steal", "guest", "guest_nice"}
- local i = 0
- local cpu_metric = metric("node_cpu_seconds_total", "counter")
- while true do
- local cpu = {string.match(stat,
- "cpu"..i.." (%d+) (%d+) (%d+) (%d+) (%d+) (%d+) (%d+) (%d+) (%d+) (%d+)")}
- if #cpu ~= 10 then
- break
- end
- for ii, mode in ipairs(cpu_mode) do
- cpu_metric({cpu="cpu"..i, mode=mode}, cpu[ii] / 100)
- end
- i = i + 1
- end
-
- -- interrupts served
- metric("node_intr_total", "counter", nil,
- string.match(stat, "intr ([0-9]+)"))
-
- -- processes forked
- metric("node_forks_total", "counter", nil,
- string.match(stat, "processes ([0-9]+)"))
-
- -- processes running
- metric("node_procs_running_total", "gauge", nil,
- string.match(stat, "procs_running ([0-9]+)"))
-
- -- processes blocked for I/O
- metric("node_procs_blocked_total", "gauge", nil,
- string.match(stat, "procs_blocked ([0-9]+)"))
- end
-
- return { scrape = scrape }
|