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Merge pull request #658 from scanterog/master

Add Docker plugins
This commit is contained in:
Stig Sandbeck Mathisen 2015-11-07 11:16:45 +01:00
commit 0c20909aba
4 changed files with 212 additions and 0 deletions

116
plugins/docker/docker_cpu Executable file
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#!/usr/bin/perl -w
# -*- perl -*-
=head1 NAME
docker_cpu - Munin plugin to monitor docker container CPU usage.
=head1 APPLICABLE SYSTEMS
Should work on any Linux system that has docker support.
=head1 CONFIGURATION
Root privilege required to execute docker command.
1. Create a new file named "docker" inside the folder /etc/munin/plugin-conf.d/
2. Docker file content:
[docker_cpu]
user root
=head1 MAGIC MARKERS
#%# family=auto
#%# capabilities=autoconf
=head1 VERSION
v.0.1
=head1 AUTHOR
Copyright (C) 2015 Samuel Cantero.
Email: scanterog at gmail dot com
=head1 LICENSE
GPLv3
=cut
my $docker=`which docker`;
if ( defined $ARGV[0] and $ARGV[0] eq "autoconf" ) {
if ($docker) {
print "yes\n";
exit 0;
}
else{
print "no (Docker has not been found)\n";
exit 0;
}
}
$docker =~ s/\s+$//;
my @containers = split "\n" , `$docker ps --no-trunc=true`;
my $result;
for my $i (1 .. $#containers)
{
my @fields = split / +/, $containers[$i];
my $id = $fields[0];
my $name = $fields[$#fields];
# manage container name containing arithmetic operators and dots. E.g, my-container.
$name =~ s/[-\+*\/\.]/_/g;
# truncate container name with "," character.
$name =~ s/,.*//g;
open(my $file, '<', "/sys/fs/cgroup/cpuacct/docker/$id/cpuacct.usage") or die "Unable to open file, $!";
my $total_cpu_ns = <$file>;
$total_cpu_ns =~ s/\s+$//;
close $file;
open($file, '<', "/sys/fs/cgroup/cpuacct/docker/$id/cpuacct.usage_percpu") or die "Unable to open file, $!";
my @ncpu = split / /, <$file>;
close $file;
push @result, {'name'=>$name, 'total_cpu_ns'=>$total_cpu_ns, 'ncpu'=>$#ncpu};
}
if (defined $ARGV[0] and $ARGV[0] eq "config")
{
my $nanoSecondsInSecond=1000000000;
my $graphlimit = $result[0]{'ncpu'};
foreach(@result){
if ($$_{'ncpu'} > $graphlimit){
$graphlimit = $$_{'ncpu'};
}
}
$graphlimit = $graphlimit * 100;
print "graph_title Docker container CPU usage\n";
print "graph_args --base 1000 -r --lower-limit 0 --upper-limit $graphlimit\n";
print "graph_vlabel %\n";
print "graph_scale no\n";
print "graph_period second\n";
print "graph_category Docker\n";
print "graph_info This graph shows docker container CPU usage.\n";
foreach(@result)
{
print "$$_{'name'}.label $$_{'name'}\n";
print "$$_{'name'}.draw LINE2\n";
print "$$_{'name'}.min 0\n";
print "$$_{'name'}.type DERIVE\n";
print "$$_{'name'}.cdef $$_{'name'},$nanoSecondsInSecond,/\n";
}
exit 0;
}
# Note: Counters/derive need to report integer values.
foreach(@result)
{
$tcpu = ($$_{'total_cpu_ns'}*100); #to percentage
print "$$_{'name'}.value $tcpu\n";
}
# vim:syntax=perl

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plugins/docker/docker_memory Executable file
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#!/usr/bin/perl -w
# -*- perl -*-
=head1 NAME
docker_memory - Munin plugin to monitor docker container memory usage.
=head1 APPLICABLE SYSTEMS
Should work on any Linux system that has docker support.
=head1 CONFIGURATION
Root privilege required to execute docker command.
1. Create a new file named "docker" inside the folder /etc/munin/plugin-conf.d/
2. Docker file content:
[docker_memory]
user root
=head1 MAGIC MARKERS
#%# family=auto
#%# capabilities=autoconf
=head1 VERSION
v.0.1
=head1 AUTHOR
Copyright (C) 2015 Samuel Cantero.
Email: scanterog at gmail dot com
=head1 LICENSE
GPLv3
=cut
my $docker=`which docker`;
if ( defined $ARGV[0] and $ARGV[0] eq "autoconf" ) {
if ($docker) {
print "yes\n";
exit 0;
}
else{
print "no (Docker has not been found)\n";
exit 0;
}
}
$docker =~ s/\s+$//;
my @containers = split "\n" , `$docker ps --no-trunc=true`;
my $result;
for my $i (1 .. $#containers)
{
my @fields = split / +/, $containers[$i];
my $id = $fields[0];
my $name = $fields[$#fields];
# manage container name containing arithmetic operators and dots. E.g, my-container.
$name =~ s/[-\+*\/\.]/_/g;
# truncate container name with "," character.
$name =~ s/,.*//g;
open(my $file, '<', "/sys/fs/cgroup/memory/docker/$id/memory.usage_in_bytes") or die "Unable to open file, $!";
my $memory_bytes = <$file>;
$memory_bytes =~ s/\s+$//;
push @result, {'name'=>$name, 'memory_bytes'=>$memory_bytes};
}
if (defined $ARGV[0] and $ARGV[0] eq "config")
{
print "graph_title Docker container memory usage\n";
print "graph_args --base 1024 -l 0\n";
print "graph_vlabel Bytes\n";
print "graph_category Docker\n";
print "graph_info This graph shows docker container memory usage.\n";
foreach(@result)
{
print "$$_{'name'}.label $$_{'name'}\n";
print "$$_{'name'}.draw LINE2\n";
}
exit 0;
}
foreach(@result)
{
print "$$_{'name'}.value $$_{'memory_bytes'}\n";
}
# vim:syntax=perl

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