renamed to lxc-exporter. os-release, apt update / upgradable.
This commit is contained in:
Denis Knauf
parent
d623efde64
commit
e225cc96db
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@ -1,12 +1,12 @@
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require 'rack'
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require_relative 'pvect-exporter'
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require_relative 'lxc-exporter'
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require 'prometheus/client/formats/text'
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run lambda {|env|
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req = Rack::Request.new env
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case req.path
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when "/metrics"
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collector = PveCtCollector.new
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collector = LxcCollector.new
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[200, {"Content-Type" => "text/plain"}, [Prometheus::Client::Formats::Text.marshal( collector.collect)]]
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else
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[404, {"Content-Type" => "text/plain"}, ["Not found\nYou want to try /metrics?\n"]]
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203
pvect-exporter.rb → lxc-exporter.rb
Normal file → Executable file
203
pvect-exporter.rb → lxc-exporter.rb
Normal file → Executable file
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@ -26,7 +26,6 @@ end
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class File
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module Statfs
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Magics = {}
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#=begin
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Line = <<~EOF
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ADFS 0xadf5
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AFFS 0xadff
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@ -121,7 +120,6 @@ class File
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end
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Magics[v] = n.downcase.to_sym
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end
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#=end
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extend Fiddle::Importer
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dlload Fiddle.dlopen( nil)
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@ -164,17 +162,12 @@ class File
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end
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class NS
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#extend FFI::Library
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#ffi_lib 'c'
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#attach_function :setns_without_exception_handling, :setns, %i[int int], :int
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extend Fiddle::Importer
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dlload Fiddle.dlopen( nil)
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SetNS_Function = Fiddle::Function.new handler['setns'], [Fiddle::TYPE_VOIDP, Fiddle::TYPE_VOIDP], Fiddle::TYPE_INT
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class <<self
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def setns fd, t
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#r = setns_without_exception_handling fd.to_i, t.to_i
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#SystemCallError.new "setns(#{fd.to_i})", FFI::LastError.error if -1 == r
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r = SetNS_Function.call fd.to_i, t.to_i
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SystemCallError.new "setns(#{fd.to_i})", Fiddle.last_error if -1 == r
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r
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@ -247,81 +240,173 @@ class MountInfo
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end
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end
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=begin
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LxcStartExe = Pathname.new "/usr/bin/lxc-start"
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def get_running_ct_pids &block
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return to_enum( __method__) unless block_given?
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class OsRelease
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Path = Pathname.new '/etc/os-release'
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class <<self
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def parse txt
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r =
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txt.each_line.
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map do |l|
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k, v =
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*case l.chomp
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when /^([^=]+)="(.*)"$/ then [$1, $2]
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when /^([^=]+)=(.*)$/ then [$1,$2]
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else next
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end
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[ k.downcase.to_sym, v.sub( /^"/, '').sub( /"$/, '') ]
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end.
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compact.
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to_h
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new r
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end
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cts = []
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Pathname.new( "/proc").each_child do |fn|
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next if /\D/ =~ fn.basename.to_s
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exepath = fn + 'exe'
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next unless exepath.exist? and LxcStartExe == exepath.readlink
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pid = fn.basename.to_s.to_i
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cts.push pid
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def read() parse Path.read if Path.exist? end
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end
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Pathname.new( "/proc").each_child do |fn|
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next if /\D/ =~ fn.basename.to_s
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statuspath = fn + 'status'
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ppid = statuspath.read.match( /^PPid:\s+(\d+)$/)[1].to_i
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next unless cts.include? ppid
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yield fn.basename.to_s.to_i
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def initialize( h) @h = h.freeze end
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def to_h() @h.dup end
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def []( n) @h[n] end
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def missing_method n, *a
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if a.empty? and @h.has_key?( n)
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@h[n]
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else
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super n, *a
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end
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end
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end
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pids = get_running_ct_pids
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=end
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class PveCtCollector
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def fetch
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LXC.list_containers.map {|n|LXC::Container.new n}.select( &:running?).each do |ct|
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pid = ct.init_pid
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mis = MountInfo.of pid
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NS.change pid, :pid, :mnt do
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mis.each do |mi|
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next if %w[devpts devtmpfs fuse.lxcfs].include? mi.type
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statfs = File::Statfs.new mi.mp
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yield ct, mi.mp, statfs
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end
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end
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class LxcCollector
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def statfs ct, mis
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mis.each do |mi|
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next if %w[devpts devtmpfs fuse.lxcfs].include? mi.type
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statfs = File::Statfs.new mi.mp
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yield ct, mi.mp, statfs
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end
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end
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def initialize registry = nil
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@prometheus ||= Prometheus::Client::Registry.new
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@info = Prometheus::Client::Gauge.new :pvect_filesystem_info, labels: %i[id mountpoint name fstype], docstring: 'CT Info'
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@totalb = Prometheus::Client::Gauge.new :pvect_filesystem_total_bytes, labels: %i[id mountpoint], docstring: 'Total bytes in filesystem'
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@freeb = Prometheus::Client::Gauge.new :pvect_filesystem_free_bytes, labels: %i[id mountpoint], docstring: 'Free bytes in filesystem'
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@availb = Prometheus::Client::Gauge.new :pvect_filesystem_available_bytes, labels: %i[id mountpoint], docstring: 'Free bytes available to unprivileged user'
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@totalf = Prometheus::Client::Gauge.new :pvect_filesystem_total_files, labels: %i[id mountpoint], docstring: 'Total files in filesystem'
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@freef = Prometheus::Client::Gauge.new :pvect_filesystem_free_files, labels: %i[id mountpoint], docstring: 'Free files in filesystem'
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[@info, @totalb, @freeb, @availb, @totalf, @freef].each {|g| @prometheus.register g }
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@info = Prometheus::Client::Gauge.new :lxc_filesystem_info,
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labels: %i[id mountpoint name fstype], docstring: 'CT Info'
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@totalb = Prometheus::Client::Gauge.new :lxc_filesystem_total_bytes,
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labels: %i[id mountpoint], docstring: 'Total bytes in filesystem'
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@freeb = Prometheus::Client::Gauge.new :lxc_filesystem_free_bytes,
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labels: %i[id mountpoint], docstring: 'Free bytes in filesystem'
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@availb = Prometheus::Client::Gauge.new :lxc_filesystem_available_bytes,
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labels: %i[id mountpoint], docstring: 'Free bytes available to unprivileged user'
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@totalf = Prometheus::Client::Gauge.new :lxc_filesystem_total_files,
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labels: %i[id mountpoint], docstring: 'Total files in filesystem'
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@freef = Prometheus::Client::Gauge.new :lxc_filesystem_free_files,
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labels: %i[id mountpoint], docstring: 'Free files in filesystem'
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@os_release = Prometheus::Client::Gauge.new :lxc_os_release_info,
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labels: %i[id name os_id os_name os_pretty_name os_version_codename],
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docstring: 'OS release info'
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@os_version = Prometheus::Client::Gauge.new :lxc_os_version_id,
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labels: %i[id], docstring: 'OS release (distribution) version'
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@pkgs_upgradable = Prometheus::Client::Gauge.new :lxc_packages_upgradable,
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labels: %i[id], docstring: 'Count of upgradable packages'
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@pkgs_last_update = Prometheus::Client::Gauge.new :lxc_packages_last_update,
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labels: %i[id], docstring: 'Last successfull source update'
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[
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@info, @totalb, @freeb, @availb, @totalf, @freef,
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@os_release, @os_version,
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@pkgs_upgradable, @pkgs_last_update
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].each {|g| @prometheus.register g }
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end
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def running_containers &exe
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return to_enum __method__ unless block_given?
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LXC.
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list_containers.
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map {|n| LXC::Container.new n }.
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select( &:running?).
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each &exe
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end
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AptLastUpdateFile = Pathname.new '/var/cache/apt/pkgcache.bin'
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def forked wr
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running_containers do |ct|
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pid = ct.init_pid
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mis = MountInfo.of pid
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NS.change pid, :pid, :mnt do
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name = ct.config_item( 'lxc.uts.name')
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statfs ct, mis do |ct, mp, st|
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next unless st.fstypename and 0 < st.blocks
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st = st.to_h.merge mp: mp, id: ct.name, name: name
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wr.puts [:mountpoint, st].to_json
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end
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osr = OsRelease.read
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if osr
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wr.puts [:os_release, {
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id: ct.name, name: name,
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os_id: osr[:id],
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os_name: osr[:name],
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os_pretty_name: osr[:pretty_name],
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os_version_id: osr[:version_id].to_i,
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os_version_codename: osr[:version_codename]
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}].to_json
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case osr[:id].to_sym
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when :debian
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upgradable = nil
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pid =
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IO.popen %w[apt list --upgradable], err: "/dev/null" do |apt|
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upgradable = apt.readlines.length - 1
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end
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wr.puts [:pkgs, {
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id: ct.name, name: name, upgradable: upgradable,
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last_update: AptLastUpdateFile.stat.mtime.to_f,
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}].to_json
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end
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end
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end
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end
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wr.close
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exit 0
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end
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def collect
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rd, wr = IO.pipe
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pid = fork do
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rd.close
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fetch do |ct, mp, st|
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next unless st.fstypename and 0 < st.blocks
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wr.puts st.to_h.merge( mp: mp, id: ct.name, name: ct.config_item( 'lxc.uts.name')).to_json
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end
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wr.close
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exit 0
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forked wr
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end
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wr.close
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rd.each_line do |l|
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st = OpenStruct.new JSON.parse( l)
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labels = {id: st.id, mountpoint: st.mp}
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@info.set 1, labels: labels.merge( name: st.name, fstype: st.fstypename)
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@totalb.set st.bsize*st.blocks, labels: labels
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@freeb.set st.bsize*st.bfree, labels: labels
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@availb.set st.bsize*st.bavail, labels: labels
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@totalf.set st.files, labels: labels
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@freef.set st.ffree, labels: labels
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l = JSON.parse l, symbolize_names: true
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case l[0].to_sym
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when :mountpoint
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st = OpenStruct.new l[1]
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labels = {id: st.id, mountpoint: st.mp}
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@info.set 1, labels: labels.merge( name: st.name, fstype: st.fstypename)
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@totalb.set st.bsize*st.blocks, labels: labels
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@freeb.set st.bsize*st.bfree, labels: labels
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@availb.set st.bsize*st.bavail, labels: labels
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@totalf.set st.files, labels: labels
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@freef.set st.ffree, labels: labels
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when :os_release
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osr = OpenStruct.new l[1]
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@os_release.set 1, labels: { id: osr.id, name: osr.name,
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os_id: osr.os_id,
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os_name: osr.os_name,
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os_pretty_name: osr.os_pretty_name,
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os_version_codename: osr.os_version_codename
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}
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@os_version.set osr.os_version_id, labels: {id: osr.id}
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when :pkgs
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as = OpenStruct.new l[1]
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@pkgs_last_update.set as.last_update, labels: { id: as.id }
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@pkgs_upgradable.set as.upgradable, labels: { id: as.id }
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end
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end
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rd.close
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Process.wait pid
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@prometheus
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end
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end
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if Pathname.new( __FILE__).expand_path == Pathname.new( $0).expand_path
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require 'prometheus/client/formats/text'
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puts Prometheus::Client::Formats::Text.marshal( LxcCollector.new.collect)
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end
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