Ganglia 的安装与部署及Flume1.9 数据流监控
背景
Ganglia主要用来监控系统性能的软件，通过曲线很容易见到每个节点的工作状态，对合理调整，分配系统资源，提高系统整体性能起到重要作用，支持浏览器方式访问，但不能监控节点硬件技术指标。Ganglia是分布式的监控系统。
Ganglia由gmond、gmetad和gweb三部分组成。
gmond（Ganglia Monitoring Daemon）是一种轻量级服务，安装在每台需要收集指标数据的节点主机上。使用gmond，你可以很容易收集很多系统指标数据，如CPU、内存、磁盘、网络和活跃进程的数据等。
gmetad（Ganglia Meta Daemon）整合所有信息，并将其以RRD格式存储至磁盘的服务。
gweb（Ganglia Web）Ganglia可视化工具，gweb是一种利用浏览器显示gmetad所存储数据的PHP前端。在Web界面中以图表方式展现集群的运行状态下收集的多种不同指标数据。
安装
1. 安装 httpd 服务与 php
sudo yum -y install httpd php2.安装其他依赖
sudo yum -y install rrdtool perl-rrdtool rrdtool-devel
sudo yum -y install apr-devel3.安装ganglia
# 需要安装源(CentOs默认源是没有Ganglia源)
yum -y install epel-release
sudo yum -y install ganglia-gmetad
sudo yum -y install ganglia-web
sudo yum install -y ganglia-gmond
4.修改配置文件/etc/httpd/conf.d/ganglia.conf
Alias /ganglia /usr/share/ganglia
Require all granted
Allow from all
# Order deny,allow
# Deny from all
# Allow from ::1
# Allow from .example.com
5.修改配置文件/etc/ganglia/gmetad.conf
# 名称 对应的ip地址
data_source "master" 192.168.16.58
6.修改配置文件/etc/ganglia/gmond.conf
cluster {
#########需要修改的项-name
name = "master"
owner = "unspecified"
latlong = "unspecified"
url = "unspecified"
}
udp_send_channel {
#bind_hostname = yes # Highly recommended, soon to be default. # This option tells gmond to use a source
Address
# that resolves to the machine's hostname.
Without
# this, the metrics may appear to come from
any
# interface and the DNS names associated with # those IPs will be used to create the RRDs.
# mcast_join = 239.2.11.71 # 数据发送给 master
#########需要修改的项-host
host = 192.168.16.58
port = 8649
ttl = 1
udp_recv_channel {
# mcast_join = 239.2.11.71 port = 8649
# 接收来自任意连接的数据
#########需要修改的项-bind
bind = 192.168.16.58
retry_bind = true
# Size of the UDP buffer. If you are handling lots of metrics you really
# should bump it up to e.g. 10MB or even higher. # buffer = 10485760
}
7.修改配置文件/etc/selinux/config
PS: selinux本次生效关闭必须重启，如果此时不想重启，可以临时生效之(不过现场测试目标文件和即将要改成的文件内容一致，似乎不需要更改)
# 不理解重启获取使其生效 sudo setenforce 0
# 需要修改的项 - SELINUX
SELINUX=disabled
# SELINUXTYPE= can take one of these two values: # targeted - Targeted processes are protected, # mls - Multi Level Security protection.
SELINUXTYPE=targeted
8.启动ganglia
sudo service httpd start
sudo service gmetad start
sudo service gmond start
9. 打开网页浏览 ganglia 页面
# 地址为
http://192.168.16.58/gangliaPS: 如果完成以上操作依然出现权限不足错误，请修改/var/lib/ganglia目录的权限
sudo chmod -R 777 /var/lib/ganglia展示效果如下
监控flume1.9
创建flume配置
vi flume-netcat-logger.conf# Name the components on this agent
a1.sources = r1
a1.sinks = k1
a1.channels = c1
# Describe/configure the source
a1.sources.r1.type = netcat
a1.sources.r1.bind = localhost
a1.sources.r1.port = 44444
# Describe the sink
a1.sinks.k1.type = logger
# Use a channel which buffers events in memory
a1.channels.c1.type = memory
a1.channels.c1.capacity = 1000
a1.channels.c1.transactionCapacity = 100
# Bind the source and sink to the channel
a1.sources.r1.channels = c1
a1.sinks.k1.channel = c1启动命令
启动后在另一个控制窗口nc localhost 44444,发送信息
../apache-flume-1.9.0-bin/bin/flume-ng agent \
--conf ../apache-flume-1.9.0-bin/conf/ \
--name a1 \
--conf-file ./flume-netcat-logger.conf -Dflume.root.logger=INFO,console \
-Dflume.monitoring.type=ganglia \
-Dflume.monitoring.hosts=192.168.16.44:8649监控效果
