redis: add munin config
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Parent
5d7a38e959
révision
9885c351e5
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#!/usr/bin/perl -w
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#
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## Copyright (C) 2009 Gleb Voronich <http://stanly.net.ua/>
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##
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## This program is free software; you can redistribute it and/or
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## modify it under the terms of the GNU General Public License
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## as published by the Free Software Foundation; version 2 dated June,
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## 1991.
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##
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## This program is distributed in the hope that it will be useful,
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## but WITHOUT ANY WARRANTY; without even the implied warranty of
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## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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## GNU General Public License for more details.
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##
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## You should have received a copy of the GNU General Public License
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## along with this program; if not, write to the Free Software
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## Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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##
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##
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## $Log$
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##
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## Based on Redis module code v0.08 2009/from http://svn.rot13.org/index.cgi/Redis
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##
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## Installation process:
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##
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## 1. Download the plugin to your plugins directory (e.g. /usr/share/munin/plugins)
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## 2. Create 3 symlinks at the directory that us used by munin for plugins detection (e.g. /etc/munin/plugins): redis_connected_clients, redis_per_sec and and redis_used_memory
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## 3. Edit plugin-conf.d/munin-node if it is needed (env.host and env.port variables are accepted; set env.password for password protected Redis server)
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## 4. Restart munin-node service
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##
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## Magic Markers
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#%# family=auto
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#%# capabilities=autoconf suggest
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use strict;
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use IO::Socket::INET;
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use IO::Socket::UNIX;
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use Switch;
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my $HOST = exists $ENV{'host'} ? $ENV{'host'} : "127.0.0.1";
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my $UNIX_SOCKET = exists $ENV{'unixsocket'} ? $ENV{'unixsocket'} : ''; # path to Redis Unix sock file
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my $PORT = exists $ENV{'port'} ? $ENV{'port'} : 6379;
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my $PASSWORD = exists $ENV{'password'} ? $ENV{'password'} : undef;
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my $TITLE_PREFIX = exists $ENV{'title_prefix'} ? $ENV{'title_prefix'} . ": " : "";
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my $sock = &get_conn();
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my $config = ( defined $ARGV[0] and $ARGV[0] eq "config" );
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my $autoconf = ( defined $ARGV[0] and $ARGV[0] eq "autoconf" );
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if ( $autoconf ) {
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if ( defined( $sock ) ) {
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print "yes\n";
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exit 0;
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} else {
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print "no (unable to connect to $HOST\[:$PORT\])\n";
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exit 0;
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}
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}
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my $suggest = ( defined $ARGV[0] and $ARGV[0] eq "suggest" );
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if ( $suggest ) {
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if ( defined( $sock ) ) {
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my @plugins = ('connected_clients', 'key_ratio', 'keys_per_sec', 'per_sec', 'used_keys', 'used_memory');
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foreach my $plugin (@plugins) {
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print "$plugin\n";
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}
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exit 0;
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} else {
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print "no (unable to connect to $HOST\[:$PORT\])\n";
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exit 0;
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}
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}
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my $hash=&get_info();
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$0 =~ s/(.+)redis_//g;
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switch ($0) {
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case "connected_clients" {
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if ( $config ) {
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my $maxclients= get_config("maxclients")->{"maxclients"};
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print "graph_title ${TITLE_PREFIX}Connected clients\n";
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print "graph_vlabel Connected clients\n";
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print "graph_category search\n";
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print "graph_args -l 0\n";
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print "connected_clients.line $maxclients:ff0000:Limit\n";
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print "connected_clients.label connected clients\n";
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exit 0;
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}
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print "connected_clients.value " . $hash->{'connected_clients'} . "\n";
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}
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case "keys_per_sec" {
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if ( $config ) {
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print "graph_title ${TITLE_PREFIX}Keys Per Second\n";
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print "graph_vlabel per \${graph_period}\n";
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print "graph_category search\n";
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print "graph_args -l 0\n";
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print "hits.label hits\n";
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print "hits.type COUNTER\n";
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print "misses.label misses\n";
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print "misses.type COUNTER\n";
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print "expired.label expirations\n";
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print "expired.type COUNTER\n";
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print "evictions.label evictions\n";
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print "evictions.type COUNTER\n";
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exit 0;
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}
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print "hits.value " . $hash->{'keyspace_hits'} . "\n";
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print "misses.value " . $hash->{'keyspace_misses'} . "\n";
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print "expired.value " . $hash->{'expired_keys'} . "\n";
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print "evictions.value " . $hash->{'evicted_keys'} . "\n";
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}
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case "key_ratio" {
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if ( $config ) {
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print "graph_title ${TITLE_PREFIX}Key Hit vs Miss Ratio\n";
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print "graph_vlabel per \${graph_period}\n";
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print "graph_category search\n";
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print "graph_args -u 100 -l 0 -r --base 1000\n";
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print "hitratio.label hit ratio\n";
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print "hitratio.type GAUGE\n";
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print "hitratio.draw AREA\n";
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print "missratio.label miss ratio\n";
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print "missratio.type GAUGE\n";
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print "missratio.draw STACK\n";
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exit 0;
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}
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my $total = $hash->{'keyspace_hits'} + $hash->{'keyspace_misses'};
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my $hitratio = 0;
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my $missratio = 0;
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if ($total > 0) {
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$hitratio = $hash->{'keyspace_hits'} / $total * 100;
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$missratio = $hash->{'keyspace_misses'} / $total * 100;
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}
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printf("hitratio.value %.2f\n", $hitratio);
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printf("missratio.value %.2f\n", $missratio);
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}
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case "per_sec" {
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if ( $config ) {
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print "graph_title ${TITLE_PREFIX}Per second\n";
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print "graph_vlabel per \${graph_period}\n";
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print "graph_category search\n";
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print "graph_args -l 0\n";
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print "requests.label requests\n";
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print "requests.type COUNTER\n";
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print "connections.label connections\n";
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print "connections.type COUNTER\n";
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exit 0;
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}
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print "requests.value ". $hash->{'total_commands_processed'} ."\n";
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print "connections.value ". $hash->{'total_connections_received'} ."\n";
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}
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case "used_memory" {
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if ( $config ) {
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my $maxmemory = get_config("maxmemory")->{"maxmemory"};
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print "graph_title ${TITLE_PREFIX}Used memory\n";
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print "graph_vlabel Used memory\n";
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print "graph_category search\n";
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print "graph_args -l 0 --base 1024\n";
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print "used_memory.line $maxmemory:ff0000:Limit\n";
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print "used_memory.label used memory\n";
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print "used_memory_peak.label used memory in peak\n";
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print "used_memory_rss.label Resident set size memory usage\n";
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exit 0;
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}
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print "used_memory.value ". $hash->{'used_memory'} ."\n";
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print "used_memory_rss.value ". $hash->{'used_memory_rss'} ."\n";
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print "used_memory_peak.value ". $hash->{'used_memory_peak'} ."\n";
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}
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case "used_keys" {
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my $dbs;
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foreach my $key (keys %{$hash}) {
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if ( $key =~ /^db\d+$/ && $hash->{$key} =~ /keys=(\d+),expires=(\d+)/ ) {
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$dbs->{$key} = [ $1, $2 ];
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}
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}
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if ( $config ) {
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print "graph_title ${TITLE_PREFIX}Used keys\n";
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print "graph_vlabel Used keys\n";
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print "graph_category search\n";
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print "graph_args -l 0\n";
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foreach my $db (keys %{$dbs}) {
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printf "%s_keys.label %s keys\n", $db, $db;
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printf "%s_expires.label %s expires\n", $db, $db;
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}
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exit 0;
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}
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foreach my $db (keys %{$dbs}) {
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printf "%s_keys.value %d\n", $db, $dbs->{$db}[0];
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printf "%s_expires.value %d\n", $db, $dbs->{$db}[1];
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}
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}
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}
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close ($sock);
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sub get_conn {
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my $sock;
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if( $UNIX_SOCKET && -S $UNIX_SOCKET ){
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$sock = IO::Socket::UNIX->new(
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Type => SOCK_STREAM(),
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Peer => $UNIX_SOCKET,
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);
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}else{
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$sock = IO::Socket::INET->new(
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PeerAddr => $HOST,
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PeerPort => $PORT,
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Timeout => 10,
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Proto => 'tcp'
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);
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}
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if ( defined( $PASSWORD ) ) {
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print $sock "AUTH ", $PASSWORD, "\r\n";
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my $result = <$sock> || die "can't read socket: $!";
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}
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return $sock;
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}
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sub get_info{
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print $sock "INFO\r\n";
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my $result = <$sock> || die "can't read socket: $!";
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my $rep;
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# +2 characters for \r\n at end of the data block
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read($sock, $rep, substr($result,1)+2) || die "can't read from socket: $!";
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my $hash;
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foreach (split(/\r\n/, substr($rep, 0, -2))) {
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my ($key,$val) = split(/:/, $_, 2);
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if (defined($key)) {
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$hash->{$key} = $val;
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}
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}
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return $hash;
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}
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# This subroutine returns configuration matched to supplied as object
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sub get_config{
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print $sock "*3\r\n\$6\r\nCONFIG\r\n\$3\r\nGET\r\n\$".length($_[0])."\r\n".$_[0]."\r\n";
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# Response will look like like
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# *2\r\n$9\r\nmaxmemory\r\n$10\r\n3221225472\r\n
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my $type = <$sock> || die "can't read socket: $!";
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my $conf;
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if( substr($type,0,1) ne "*" ) {
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return $conf;
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}
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my $count=substr($type,1);
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my ( $namesize, $name, $valuesize, $value );
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while ( $count > 1 ){
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$count=$count-2;
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$namesize=<$sock>;
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read($sock, $name, substr($namesize,1)+2) || die "can't read from socket: $!";
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$valuesize=<$sock>;
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read($sock, $value, substr($valuesize,1)+2) || die "can't read from socket: $!";
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$conf->{substr($name, 0, -2)}=substr($value, 0, -2);
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}
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return $conf;
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}
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# vim: ft=perl ai ts=4 sw=4 et:
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@ -23,3 +23,5 @@
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state: started
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tags:
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- redis
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- include: munin.yml
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@ -0,0 +1,62 @@
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---
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- name: Install munin check dependencies
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apt:
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name: libswitch-perl
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state: present
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tags:
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- redis
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- name: Check if /usr is a partition
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shell: "mount | grep 'on /usr type'"
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args:
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warn: no
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changed_when: False
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failed_when: False
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check_mode: no
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register: usr_partition
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tags: redis
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- name: Mount /usr in rw
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command: mount -o remount,rw /usr
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args:
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warn: no
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changed_when: False
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when: usr_partition.rc == 0
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tags: redis
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- name: Create plugin directory
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file:
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name: /usr/local/share/munin/
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state: directory
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mode: "0755"
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tags: redis
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- name: Create plugin directory
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file:
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name: /usr/local/share/munin/plugins/
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state: directory
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mode: "0755"
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tags: redis
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- name: Copy redis munin plugin
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copy:
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src: munin_redis
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dest: /usr/local/share/munin/plugins/redis_
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mode: "0755"
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notify: restart munin-node
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tags: redis
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- name: Enable redis munin plugin
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file:
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src: /usr/local/share/munin/plugins/redis_
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dest: "/etc/munin/plugins/redis_{{item}}"
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state: link
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with_items:
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- connected_clients
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- key_ratio
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- keys_per_sec
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- per_sec
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- used_keys
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- used_memory
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notify: restart munin-node
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tags: redis
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