14-Flume案例-Ganglia的安装与部署

# Flume案例-Ganglia的安装与部署
## Ganglia
### 1.安装httpd服务与php
```bash
[nbu@hadoop102 flume]$ sudo yum -y install httpd php
```
### 2.安装其他依赖
```bash
[nbu@hadoop102 flume]$ sudo yum -y install rrdtool perl-rrdtool rrdtool-devel
[nbu@hadoop102 flume]$ sudo yum -y install apr-devel
```
### 3.安装 ganglia
```bash
[nbu@hadoop102 flume]$ sudo rpm -Uvh http://dl.fedoraproject.org/pub/epel/6/x86_64/epel-release-6-8.noarch.rpm
[nbu@hadoop102 flume]$ sudo yum -y install ganglia-gmetad
[nbu@hadoop102 flume]$ sudo yum -y install ganglia-web
[nbu@hadoop102 flume]$ sudo yum -y install ganglia-gmond
```
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。
### 4.修改配置文件/etc/httpd/conf.d/ganglia.conf
```bash
[nbu@hadoop102 flume]$ sudo vim /etc/httpd/conf.d/ganglia.conf
```
修改为红颜色的配置：
```bash
# Ganglia monitoring system php web frontend
Alias /ganglia /usr/share/ganglia
<Location /ganglia>
Order deny,allow
#Deny from all
Allow from all  #红色配置
# Allow from 127.0.0.1
# Allow from ::1
# Allow from .example.com
</Location>
```
### 5.修改配置文件/etc/ganglia/gmetad.conf
```bash
[nbu@hadoop102 flume]$ sudo vim /etc/ganglia/gmetad.conf
```
修改内容：
**data_source "hadoop102" 192.168.9.102**
### 6.修改配置文件/etc/ganglia/gmond.conf
```bash
[nbu@hadoop102 flume]$ sudo vim /etc/ganglia/gmond.conf
```
修改为：
```bash
cluster {
name = "hadoop102"
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
host = 192.168.9.102
port = 8649
ttl = 1
}
udp_recv_channel {
# mcast_join = 239.2.11.71
port = 8649
bind = 192.168.9.102
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
```bash
[nbu@hadoop102 flume]$ sudo vim /etc/selinux/config
```
修改为：
```bash
# This file controls the state of SELinux on the system.
# SELINUX= can take one of these three values:
# enforcing - SELinux security policy is enforced.
# permissive - SELinux prints warnings instead of enforcing.
# disabled - No SELinux policy is loaded.
SELINUX=disabled
# SELINUXTYPE= can take one of these two values:
# targeted - Targeted processes are protected,
# mls - Multi Level Security protection.
SELINUXTYPE=targeted
```
提示： 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：
```bash
[nbu@hadoop102 flume]$ sudo setenforce 0
```
### 8.启动 ganglia
```bash
[nbu@hadoop102 flume]$ sudo service httpd start
[nbu@hadoop102 flume]$ sudo service gmetad start
[nbu@hadoop102 flume]$ sudo service gmond start
```
### 9.打开网页浏览 ganglia 页面
http://192.168.9.102/ganglia
提示：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：
```bash
[nbu@hadoop102 flume]$ sudo chmod -R 777 /var/lib/ganglia
```

## 操作Flume测试监控
### 1.flume-env.sh 配置
修改/opt/module/flume/conf 目录下的 flume-env.sh 配置:
```bash
JAVA_OPTS="-Dflume.monitoring.type=ganglia
-Dflume.monitoring.hosts=192.168.9.102:8649
-Xms100m
-Xmx200m"
```
### 2.启动 Flume 任务
```bash
[nbu@hadoop102 flume]$ bin/flume-ng agent \
--conf conf/ \
--name a1 \
--conf-file job/flume-netcat-logger.conf \
-Dflume.root.logger==INFO,console \
-Dflume.monitoring.type=ganglia \
-Dflume.monitoring.hosts=192.168.9.102:8649
```
### 3.发送数据观察 ganglia 监测图
```bash
[nbu@hadoop102 flume]$ nc localhost 44444
```
样式如图:
![](https://hexo-img.obs.cn-east-3.myhuaweicloud.com/img/202204140935224.jpg)
图例说明:
![](https://hexo-img.obs.cn-east-3.myhuaweicloud.com/img/202204140935474.jpg)

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