41 lines
1.3 KiB
Lua
41 lines
1.3 KiB
Lua
-- 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 true do
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local cpu = {string.match(stat, "cpu"..i.." (%d+) (%d+) (%d+) (%d+) (%d+) (%d+) (%d+) (%d+) (%d+) (%d+)")}
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if #cpu ~= 10 then
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break
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end
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for ii, mode in ipairs(cpu_mode) do
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cpu_metric({cpu="cpu"..i, mode=mode}, 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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