使用collectd与visage收集kvm虚拟机性能实时图形
软件功能：通过collectd软件来监控收集kvm虚拟机的性能数据，包含cpu，memory、磁盘IO、网络流量等
通过visage软件将收集到的数据绘制图形。
安装：
系统环境：ubuntu12.04
collectd
首先、在collectd官网下载collectd包collectd-5.4.0
安装collectd依赖包
apt-get install bison flex autoconf pkg-config libtool libgcrypt11-dev librrd-dev
安装完毕后，到collectd-5.4.0文件夹下编译源代码并安装
./configure --prefix=/ --exec-prefix=/usr--enable-cpu --enable-network --enable-libvirt --enable-logfile --enable-rrdtool--enable-rrdcached
make&&make install
改动配置
mkdir /etc/collect
mv /etc/collectd.conf /etc/collect
vi /etc/collect/collectd.conf
在collectd.conf文件里改动内容
LoadPlugin syslog
LoadPlugin logfile
LogLevel info
File STDOUT
Timestamp true
PrintSeverity false
LogLevel info
LoadPlugin cpu
LoadPlugin df
LoadPlugin disk
LoadPlugin interface
LoadPlugin irq
LoadPlugin libvirt
LoadPlugin load
LoadPlugin memory
LoadPlugin network
LoadPlugin processes
LoadPlugin rrdcached
LoadPlugin rrdtool
LoadPlugin users
# # client setup:
Server "192.168.0.12" "25826" //客户端配置收集数据的服务端 IP +port
Server "192.168.0.16" "25826"
#
# SecurityLevel Encrypt
# Username "user"
# Password "secret"
# Interface "eth0"
#
# TimeToLive "128"
#
# # server setup:
Listen "192.168.0.16" "25826" //collectd作为收集服务端须要打开listen IP + port
#
Connection "qemu:///system"
RefreshInterval 60
# Domain "name"
BlockDevice "/:hdc/"
# InterfaceDevice "name:device"
IgnoreSelected true
HostnameFormat uuid
InterfaceFormat "address"
在安装文件夹下将collectd运行文件复制到/ect/init.d/文件夹下然后启动collectd
service collectd start
visage 安装visage依赖包
apt-get install -y build-essential librrd-ruby ruby ruby-dev rubygems
安装visage软件
apt-get install gem
gem install visage-app
启动visage
visage-app start
启动后訪问visage-app的web界面
http://visage-app-server:9292
错误解答：
启动visage-app报错：
root@PS-8:/# visage-app start
/var/lib/gems/1.8/gems/visage-app-2.1.0/lib/visage-app/types.rb:19:in `initialize': No such file or directory - /usr/share/collectd/types.db (Errno::ENOENT)
from /var/lib/gems/1.8/gems/visage-app-2.1.0/lib/visage-app/types.rb:19:in `new'
from /var/lib/gems/1.8/gems/visage-app-2.1.0/lib/visage-app/types.rb:19:in `build'
from /var/lib/gems/1.8/gems/visage-app-2.1.0/lib/visage-app/types.rb:10:in `initialize'
from /var/lib/gems/1.8/gems/visage-app-2.1.0/lib/visage-app.rb:34:in `new'
from /var/lib/gems/1.8/gems/visage-app-2.1.0/lib/visage-app.rb:34
from /var/lib/gems/1.8/gems/visage-app-2.1.0/lib/visage-app/config.rb:6:in `use'
from /var/lib/gems/1.8/gems/visage-app-2.1.0/lib/visage-app.rb:31
from /var/lib/gems/1.8/gems/sinatra-1.3.2/lib/sinatra/base.rb:1273:in `configure'
from /var/lib/gems/1.8/gems/visage-app-2.1.0/lib/visage-app.rb:30
from /usr/lib/ruby/vendor_ruby/1.8/rubygems/custom_require.rb:36:in `gem_original_require'
from /usr/lib/ruby/vendor_ruby/1.8/rubygems/custom_require.rb:36:in `require'
from /var/lib/gems/1.8/gems/visage-app-2.1.0/bin/visage-app:17
from /usr/local/bin/visage-app:19:in `load'
from /usr/local/bin/visage-app:19
ollectd编译安转types.rb默认在文件夹/share/collectd/文件夹下，将types.rb文件复制到/usr/share/collectd文件夹下，并将collectd.conf配置文件里设置參数：
TypesDB "/usr/share/collectd/types.db"
然后再启动collectd和visage-app
visage-app收集不到数据
在visage-app界面上查看不到server？
visage-app启动默认是在文件夹/var/lib/collectd/rrd文件夹下去收集server，可是collectd编译安装数据默认在/var/lib/collectd/文件夹下。在collectd.conf配置文件里设置參数：
BaseDir "/var/lib/collectd/rrd"
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