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#!/usr/bin/lua
-- this tries to create the same metrics as: https://github.com/SuperQ/chrony_exporter
--
local chrony_sources_cmd = 'chronyc -n -c sources'
local chrony_tracking_cmd = 'chronyc -n -c tracking'
local source_states = {}
source_states['*'] = "sync"
source_states['?'] = "unreach"
source_states['x'] = "falseticker"
source_states['~'] = "jittery"
source_states['+'] = "candidate"
source_states['-'] = "outlier"
local source_modes = {}
source_modes['^'] = "client"
source_modes['='] = "peer"
source_modes['#'] = "reference clock"
function get_cmdoutput(cmd)
local chronyc_out, err = io.popen(cmd)
if err ~= nil then return nil, err end
local lines = {}
for line in chronyc_out:lines() do
if line == "506 Cannot talk to daemon" then
return nil, "line"
end
table.insert(lines, line)
end
return lines
end
function comma_split(s)
local elements = {}
for element in s:gmatch("([^,]*)") do
if element ~= "" then table.insert(elements, element) end
end
return elements
end
local function scrape()
local chrony_tracking = get_cmdoutput(chrony_tracking_cmd)
local chrony_sources = get_cmdoutput(chrony_sources_cmd)
local metric_up = metric("chrony_up", "gauge")
if chrony_tracking == nil or chrony_sources == nil then
metric_up(nil, 0)
return
end
metric_up(nil, 1)
for _, line in ipairs(chrony_tracking) do
local items = comma_split(line)
metric("chrony_tracking_info", "gauge", { tracking_address = items[2], tracking_name = items[2], tracking_refid = items[1]}, 1)
metric("chrony_tracking_last_offset_seconds", "gauge", nil, tonumber(items[6]))
metric("chrony_tracking_reference_timestamp_seconds", "gauge", nil, tonumber(items[4]))
metric("chrony_tracking_rms_offset_seconds", "gauge", nil, tonumber(items[7]))
metric("chrony_tracking_root_delay_seconds", "gauge", nil, tonumber(items[11]))
metric("chrony_tracking_root_dispersion_seconds", "gauge", nil, tonumber(items[12]))
metric("chrony_tracking_stratum", "gauge", nil, tonumber(items[3]))
metric("chrony_tracking_system_time_seconds", "gauge", nil, tonumber(items[5]))
end
local metric_sources_ls_age = metric("chrony_sources_last_sample_age_seconds", "gauge")
for _, line in ipairs(chrony_sources) do
local items = comma_split(line)
metric_sources_ls_age({ source_address = items[3], source_name = items[3] }, tonumber(items[7]))
end
local metric_sources_ls_error = metric("chrony_sources_last_sample_error_margin_seconds", "gauge")
for _, line in ipairs(chrony_sources) do
local items = comma_split(line)
metric_sources_ls_error({ source_address = items[3], source_name = items[3] }, tonumber(items[10]))
end
local metric_sources_ls_offset = metric("chrony_sources_last_sample_offset_seconds", "gauge")
for _, line in ipairs(chrony_sources) do
local items = comma_split(line)
metric_sources_ls_offset({ source_address = items[3], source_name = items[3] }, tonumber(items[8]))
end
local metric_sources_polling_int = metric("chrony_sources_polling_interval_seconds", "gauge")
for _, line in ipairs(chrony_sources) do
local items = comma_split(line)
metric_sources_polling_int({ source_address = items[3], source_name = items[3] }, 2^tonumber(items[5]))
end
local metric_sources_info = metric("chrony_sources_state_info", "gauge")
for _, line in ipairs(chrony_sources) do
local items = comma_split(line)
metric_sources_info({ source_address = items[3], source_name = items[3], source_mode = source_modes[items[1]], source_state = source_states[items[2]] }, 1)
end
local metric_sources_stratum = metric("chrony_sources_stratum", "gauge")
for _, line in ipairs(chrony_sources) do
local items = comma_split(line)
metric_sources_stratum({ source_address = items[3], source_name = items[3] }, tonumber(items[4]))
end
end
return { scrape = scrape }
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