开始之前,先来百度下redis是什么?
Redis 是一个高性能的key-value数据库。 redis的出现,很大程度补偿了memcached这类keyvalue存储的不足,在部分场合可以对关系数据库起到很好的补充作用。它提供了Python,Ruby,Erlang,PHP客户端,使用很方便!
简单来说,redis和memcache这种东西用的好,可以很好的减轻后端数据库的压力,作为DBA,不能一成不变的停留在自己的一亩三分地上啊!
对于memcache和redis这种类似缓存数据库的东西,需要加大监控的力度,memcache的监控相对容易实现,可以借助memcache.php对memcache的使用情况用饼图的方式显示出来,还可以用nagios对memcache的端口或进程做实时监控,同样redis也可以对端口和进程做实时监控,但要看更多的信息,则需要用相应的监控软件,本文主要介绍在centos6.3上redmon和redis-live两款开源软件的使用情况,前者基于ruby,后者则基于python,从部署难度和功能上,我更青睐于后者!
一:redmon的安装和使用
1:安装rvm,rvm是ruby version manager的缩写,ruby语言是鬼子弄出来的,虽然不是程序员,我也一直不待见,真心觉得难用!
#bash < <(curl -s https://raw.github.com/wayneeseguin/rvm/master/binscripts/rvm-installer)
# echo '[[ -s "$HOME/.rvm/scripts/rvm" ]] && . "$HOME/.rvm/scripts/rvm" # Load RVM function' >> ~/.bash_profile
2:查看可用的ruby版本
# /usr/local/rvm/bin/rvm list known
3:通过rvm安装ruby
# /usr/local/rvm/bin/rvm install 1.9.2
# /usr/local/rvm/bin/rvm alias create default ruby-1.9.2-p320
# /usr/local/rvm/bin/rvm list
rvm rubies
=* ruby-1.9.2-p320 [ x86_64 ]
# => - current
# =* - current && default
# * - default
# ruby -v
ruby 1.9.2p320 (2012-04-20 revision 35421) [x86_64-linux]
4:通过gem安装bundler
# gem install bundler
5:通过git获取redmon源代码并安装
# git clone https://github.com/steelThread/redmon.git
Initialized empty Git repository in /root/redmon/.git/
remote: Counting objects: 975, done.
remote: Compressing objects: 100% (506/506), done.
remote: Total 975 (delta 483), reused 928 (delta 436)
Receiving objects: 100% (975/975), 2.57 MiB | 714 KiB/s, done.
Resolving deltas: 100% (483/483), done.
# grep -A 4 'option :redis_url' redmon/bin/redmon
option :redis_url,
:short => '-r URL',
:long => '--redis URL',
:default => 'redis://192.168.1.78:6377',
:description => "The Redis url for monitor (default: redis://192.168.1.78:6377)"
# grep -A 9 'class Config' redmon/lib/redmon/config.rb
class Config
DEFAULTS = {
:namespace => 'redmon',
:redis_url => 'redis://192.168.1.78:6377',
:app => true,
:worker => true,
:web_interface => ['0.0.0.0', 4567],
:poll_interval => 10,
:secure => false
}
# cd redmon/
# bundle exec /root/redmon/bin/redmon
>> Maximum connections set to 1024
>> Listening on 0.0.0.0:4567, CTRL+C to stop
[12-09-25 11:03:20] listening on http#0.0.0.0:4567
6:web接口情况,使用上存在无法添加对多个redis实例的监控
redmon监控安装参考下列文章,在此感谢作者分享!
http://wangliang.me/?p=84
https://github.com/steelThread/redmon
二:redis-live的安装和使用,同redmon相比,添加多个redis实例监控显得非常容易!而且实时性强,大赞!
# wget http://dl.fedoraproject.org/pub/epel/6/x86_64/python-pip-0.8-1.el6.noarch.rpm
# rpm -ivh python-pip-0.8-1.el6.noarch.rpm
# pip-python install tornado
# pip-python install redis
# pip-python install python-dateutil
# pip-python install argparse
# git clone https://github.com/kumarnitin/RedisLive.git
Initialized empty Git repository in /root/RedisLive/.git/
remote: Counting objects: 715, done.
remote: Compressing objects: 100% (377/377), done.
remote: Total 715 (delta 338), reused 699 (delta 323)
Receiving objects: 100% (715/715), 2.59 MiB | 353 KiB/s, done.
Resolving deltas: 100% (338/338), done.
# cd RedisLive/src
# cat redis-live.conf
{
"RedisServers":
[
{
"server" : "192.168.1.78",
"port" : 6377
},
{
"server" : "192.168.1.78",
"port" : 6380
},
{
"server" : "192.168.1.78",
"port" : 6381
}
],
"DataStoreType" : "sqlite",
"RedisStatsServer":
{
"server" : "127.0.0.1",
"port" : 6381
}
}
# ./redis-monitor.py --duration 120 &
# ./redis-live.py &
# netstat -ntpl |grep python
tcp 0 0 0.0.0.0:8888 0.0.0.0:* LISTEN 6652/python
tcp 0 0 :::8888 :::* LISTEN 6652/python
web接口情况:
参考官方文档:http://www.nkrode.com/article/real-time-dashboard-for-redis
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