Flume-数据流监控 Ganglia

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。

一、安装

# 替换阿里 yum 源
mv /etc/yum.repos.d/CentOS-Base.repo /etc/yum.repos.d/CentOS-Base.repo.backup
curl -o /etc/yum.repos.d/CentOS-Base.repo http://mirrors.aliyun.com/repo/Centos-7.repo
sed -i -e '/mirrors.cloud.aliyuncs.com/d' -e '/mirrors.aliyuncs.com/d' /etc/yum.repos.d/CentOS-Base.repo

# 安装 httpd 服务与 php
sudo yum -y install httpd php

# 安装其他依赖
sudo yum -y install rrdtool perl-rrdtool rrdtool-devel
sudo yum -y install apr-devel

# ganglia 在 epel 源中
mv /etc/yum.repos.d/epel.repo /etc/yum.repos.d/epel.repo.backup
mv /etc/yum.repos.d/epel-testing.repo /etc/yum.repos.d/epel-testing.repo.backup
curl -o /etc/yum.repos.d/epel.repo http://mirrors.aliyun.com/repo/epel-7.repo

# 安装 ganglia
sudo yum -y install ganglia-gmetad
sudo yum -y install ganglia-web
sudo yum -y install ganglia-gmond

二、配置

1.httpd 配置

https://blog.csdn.net/mxl00z/article/details/83041266

sudo vim /etc/httpd/conf.d/ganglia.conf

ganglia.conf

#
# Ganglia monitoring system php web frontend
#

Alias /ganglia /usr/share/ganglia

<Location /ganglia>
  # Options Indexes FollowSymLinks
  # AllowOverride None
  Require all granted
  # Order deny,allow
  # Deny from all
  # Allow from all
  # Require local
  # Require ip 10.1.2.3
  # Require host example.org
</Location>

2.gmetad 配置

sudo vim /etc/ganglia/gmetad.conf

gmetad.conf

。。。。。。
# A list of machines which service the data source follows, in the 
# format ip:port, or name:port. If a port is not specified then 8649
# (the default gmond port) is assumed.
# default: There is no default value
#
# data_source "my cluster" 10 localhost  my.machine.edu:8649  1.2.3.5:8655
# data_source "my grid" 50 1.3.4.7:8655 grid.org:8651 grid-backup.org:8651
# data_source "another source" 1.3.4.7:8655  1.3.4.8

data_source "h136" 192.168.8.136

。。。。。。

3.gmond 配置

sudo vim /etc/ganglia/gmond.conf

gmond.conf

。。。。。。
/*
 * The cluster attributes specified will be used as part of the <CLUSTER>
 * tag that will wrap all hosts collected by this instance.
 */
cluster {
  name = "h136"
  owner = "unspecified"
  latlong = "unspecified"
  url = "unspecified"
}

/* The host section describes attributes of the host, like the location */
host {
  location = "unspecified"
}

/* Feel free to specify as many udp_send_channels as you like.  Gmond
   used to only support having a single channel */
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 = 192.168.8.136
  port = 8649
  ttl = 1
}

/* You can specify as many udp_recv_channels as you like as well. */
udp_recv_channel {
  # mcast_join = 239.2.11.71
  port = 8649
  bind = 192.168.8.136
  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
}

。。。。。。

4.selinux 配置

setenforce 0

sed -i 's/SELINUX=enforcing/SELINUX=disabled/g' /etc/selinux/config

三、启动

systemctl restart httpd
systemctl restart gmetad
systemctl restart gmond

浏览器访问：http://IP/ganglia/

若出现 You don't have permission to access /ganglia/ on this server，可以修改/var/lib/ganglia 目录的权限。

sudo chmod -R 0777 /var/lib/ganglia

四、操作 Flume 测试监控

修改 flume-env.sh，添加 JAVA_OPTS

vim /opt/apache-flume-1.9.0-bin/conf/flume-env.sh


JAVA_OPTS="-Dflume.monitoring.type=ganglia -Dflume.monitoring.hosts=192.168.8.136:8649 -Xms100m -Xmx200m"

测试任务文件

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 = 127.0.0.1
a1.sources.r1.port = 4444

# 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 Flume 任务

cd /opt/apache-flume-1.9.0-bin

bin/flume-ng agent --conf conf/ --name a1 --conf-file /tmp/flume-job/flume-netcat-logger.conf -Dflume.root.logger==INFO,console -Dflume.monitoring.type=ganglia -Dflume.monitoring.hosts=192.168.8.136:8649

nc 127.0.0.1 4444

123

查看 Ganglia

图例说明：

字段（图表名称）	字段含义
EventPutAttemptCount	source 尝试写入 channel 的事件总数量
EventPutSuccessCount	成功写入 channel 且提交的事件总数量
EventTakeAttemptCount	sink 尝试从 channel 拉取事件的总数量
EventTakeSuccessCount	sink 成功读取的事件的总数量
StartTime	channel 启动的时间（毫秒）
StopTime	channel 停止的时间（毫秒）
ChannelSize	目前 channel 中事件的总数量
ChannelFillPercentage	channel 占用百分比
ChannelCapacity	channel 的容量