什么是日志?

日志就是程序产生的,遵循一定格式(通常包含时间戳)的文本数据

通常日志由服务器生成,输出到不同的文件中,一般会有系统日志、 应用日志、安全日志。这些日志分散地存储在不同的机器上。

通常当系统发生故障时,工程师需要登录到各个服务器上,使用 grep / sed / awk 等 Linux 脚本工具去日志里查找故障原因。在没有日志系统的情况下,首先需要定位处理请求的服务器,如果这台服务器部署了多个实例,则需要去每个应用实例的日志目录下去找日志文件。每个应用实例还会设置日志滚动策略(如:每天生成一个文件),还有日志压缩归档策略等。

这样一系列流程下来,对于我们排查故障以及及时找到故障原因,造成了比较大的麻烦。因此,如果我们能把这些日志集中管理,并提供集中检索功能,不仅可以提高诊断的效率,同时对系统情况有个全面的理解,避免事后救火的被动。

我认为,日志数据在以下几方面具有非常重要的作用:

数据查找:通过检索日志信息,定位相应的 bug ,找出解决方案

服务诊断:通过对日志信息进行统计、分析,了解服务器的负荷和服务运行状态

数据分析:可以做进一步的数据分析,比如根据请求中的课程 id ,找出 TOP10 用户感兴趣课程。

针对这些问题,为了提供分布式的实时日志搜集和分析的监控系统,我们采用了业界通用的日志数据管理解决方案 - 它主要包括 Elasticsearch 、 Logstash 和 Kibana 三个系统。通常,业界把这套方案简称为ELK,取三个系统的首字母,但是我们实践之后将其进一步优化为EFK,F代表Filebeat,用以解决Logstash导致的问题。

一、ELK是什么鬼?

ELK实际上是三个工具的集合,Elasticsearch + Logstash + Kibana,这三个工具组合形成了一套实用、易用的监控架构,很多公司利用它来搭建可视化的海量日志分析平台。

  1. ElasticSearch

ElasticSearch是一个基于Lucene的搜索服务器。它提供了一个分布式多用户能力的全文搜索引擎,基于RESTful web接口。Elasticsearch是用Java开发的,并作为Apache许可条款下的开放源码发布,是当前流行的企业级搜索引擎。设计用于云计算中,能够达到实时搜索,稳定,可靠,快速,安装使用方便。

  1. Logstash

Logstash是一个用于管理日志和事件的工具,你可以用它去收集日志、转换日志、解析日志并将他们作为数据提供给其它模块调用,例如搜索、存储等。

  1. Kibana

Kibana是一个优秀的前端日志展示框架,它可以非常详细的将日志转化为各种图表,为用户提供强大的数据可视化支持。

二、ELK有何优势?

  1. 强大的搜索功能,elasticsearch可以以分布式搜索的方式快速检索,而且支持DSL的语法来进行搜索,简单的说,就是通过类似配置的语言,快速筛选数据。

  2. 完美的展示功能,可以展示非常详细的图表信息,而且可以定制展示内容,将数据可视化发挥的淋漓尽致。

  3. 分布式功能,能够解决大型集群运维工作很多问题,包括监控、预警、日志收集解析等。

三、ELK一般用来做啥?

ELK组件在海量日志系统的运维中,可用于解决:

  • 分布式日志数据集中式查询和管理
  • 系统监控,包含系统硬件和应用各个组件的监控
  • 故障排查
  • 安全信息和事件管理
  • 报表功能

ELK组件在大数据运维系统中,主要可解决的问题如下:

  • 日志查询,问题排查,上线检查
  • 服务器监控,应用监控,错误报警,Bug管理
  • 性能分析,用户行为分析,安全漏洞分析,时间管理

在Centos7上部署ELK实时日志分析平台_第1张图片

如上图:Logstash收集AppServer产生的Log,并存放到ElasticSearch集群中,而Kibana则从ES集群中查询数据生成图表,再返回给Browser。

ELK环境部署:

(0)基础环境介绍

系统: Centos7

防火墙: 关闭

Sellinux: 关闭

机器环境: 两台

elk-node1: 192.168.1.160       #master机器
elk-node2:192.168.1.161      #slave机器

注明:

master-slave模式:

master收集到日志后,会把一部分数据碎片到salve上(随机的一部分数据);同时,master和slave又都会各自做副本,并把副本放到对方机器上,这样就保证了数据不会丢失。
如果master宕机了,那么客户端在日志采集配置中将elasticsearch主机指向改为slave,就可以保证ELK日志的正常采集和web展示。

由于elk-node1和elk-node2两台是虚拟机,没有外网ip,所以访问需要通过宿主机进行代理转发实现。

有以下两种转发设置:(任选其一)

通过访问宿主机的19200,19201端口分别转发到elk-node1,elk-node2的9200端口
通过访问宿主机的15601端口转发到elk-node1的5601端口

宿主机:112.110.115.10(内网ip为192.168.1.7) (为了不让线上的真实ip暴露,这里任意给了一个ip做记录)

a)通过宿主机的haproxy服务进行代理转发,如下是宿主机上的代理配置:

[root@kvm-server conf]# pwd
/usr/local/haproxy/conf
[root@kvm-server conf]# cat haproxy.cfg
..........
..........
listen node1-9200 0.0.0.0:19200
mode tcp
option tcplog
balance roundrobin
server 192.168.1.160 192.168.1.160:9200 weight 1 check inter 1s rise 2 fall 2

listen node2-9200 0.0.0.0:19201
mode tcp
option tcplog
balance roundrobin
server 192.168.1.161 192.168.1.161:9200 weight 1 check inter 1s rise 2 fall 2

listen node1-5601 0.0.0.0:15601
mode tcp
option tcplog
balance roundrobin
server 192.168.1.160 192.168.1.160:5601 weight 1 check inter 1s rise 2 fall 2

重启haproxy服务
[root@kvm-server conf]# /etc/init.d/haproxy restart

设置宿主机防火墙
[root@kvm-server conf]# cat /etc/sysconfig/iptables
.........
-A INPUT -p tcp -m state --state NEW -m tcp --dport 19200 -j ACCEPT
-A INPUT -p tcp -m state --state NEW -m tcp --dport 19201 -j ACCEPT 
-A INPUT -p tcp -m state --state NEW -m tcp --dport 15601 -j ACCEPT

[root@kvm-server conf]# /etc/init.d/iptables restart

b)通过宿主机的NAT端口转发实现

[root@kvm-server conf]# iptables -t nat -A PREROUTING -p tcp -m tcp --dport 19200 -j DNAT --to-destination 192.168.1.160:9200
[root@kvm-server conf]# iptables -t nat -A POSTROUTING -d 192.168.1.160/32 -p tcp -m tcp --sport 9200 -j SNAT --to-source 192.168.1.7
[root@kvm-server conf]# iptables -t filter -A INPUT -p tcp -m state --state NEW -m tcp --dport 19200 -j ACCEPT

[root@kvm-server conf]# iptables -t nat -A PREROUTING -p tcp -m tcp --dport 19201 -j DNAT --to-destination 192.168.1.161:9200
[root@kvm-server conf]# iptables -t nat -A POSTROUTING -d 192.168.1.161/32 -p tcp -m tcp --sport 9200 -j SNAT --to-source 192.168.1.7
[root@kvm-server conf]# iptables -t filter -A INPUT -p tcp -m state --state NEW -m tcp --dport 19201 -j ACCEPT

[root@kvm-server conf]# iptables -t nat -A PREROUTING -p tcp -m tcp --dport 15601 -j DNAT --to-destination 192.168.1.160:5601
[root@kvm-server conf]# iptables -t nat -A POSTROUTING -d 192.168.1.160/32 -p tcp -m tcp --sport 5601 -j SNAT --to-source 192.168.1.7
[root@kvm-server conf]# iptables -t filter -A INPUT -p tcp -m state --state NEW -m tcp --dport 15601 -j ACCEPT

[root@kvm-server conf]# service iptables save
[root@kvm-server conf]# service iptables restart

提醒一点:

nat端口转发设置成功后,/etc/sysconfig/iptables文件里要注释掉下面两行!不然nat转发会有问题!一般如上面在nat转发规则设置好并save和restart防火墙之后就会自动在/etc/sysconfig/iptables文件里删除掉下面两行内容了。

[root@kvm-server conf]# vim /etc/sysconfig/iptables
..........
#-A INPUT -j REJECT --reject-with icmp-host-prohibited 
#-A FORWARD -j REJECT --reject-with icmp-host-prohibited
[root@linux-node1 ~]# service iptables restart

(1). Elasticsearch安装配置

基础环境安装(elk-node1和elk-node2同时操作)

1)下载并安装GPG Key

[root@elk-node1 ~]# rpm --import https://packages.elastic.co/GPG-KEY-elasticsearch

2)添加yum仓库

[root@elk-node1 ~]# vim /etc/yum.repos.d/elasticsearch.repo
[elasticsearch-2.x]
name=Elasticsearch repository for 2.x packages
baseurl=http://packages.elastic.co/elasticsearch/2.x/centos
gpgcheck=1
gpgkey=http://packages.elastic.co/GPG-KEY-elasticsearch
enabled=1

3)安装elasticsearch

[root@elk-node1 ~]# yum install -y elasticsearch

4)安装相关测试软件

#提前先下载安装epel源:epel-release-latest-7.noarch.rpm,否则yum会报错:No Package.....
[root@elk-node1 ~]# wget http://dl.fedoraproject.org/pub/epel/epel-release-latest-7.noarch.rpm
[root@elk-node1 ~]# rpm -ivh epel-release-latest-7.noarch.rpm
#安装Redis
[root@elk-node1 ~]# yum install -y redis
#安装Nginx
[root@elk-node1 ~]# yum install -y nginx
#安装java
[root@elk-node1 ~]# yum install -y java

安装完java后,检测

[root@elk-node1 ~]# java -version
openjdk version "1.8.0_102"
OpenJDK Runtime Environment (build 1.8.0_102-b14)
OpenJDK 64-Bit Server VM (build 25.102-b14, mixed mode)

配置部署(下面先进行elk-node1的配置)

1)配置修改配置文件

[root@elk-node1 ~]# mkdir -p /data/es-data
[root@elk-node1 ~]# vim /etc/elasticsearch/elasticsearch.yml                               【将里面内容情况,配置下面内容】
cluster.name: huanqiu                            # 组名(同一个组,组名必须一致)
node.name: elk-node1                            # 节点名称,建议和主机名一致
path.data: /data/es-data                         # 数据存放的路径
path.logs: /var/log/elasticsearch/             # 日志存放的路径
bootstrap.mlockall: true                         # 锁住内存,不被使用到交换分区去
network.host: 0.0.0.0                            # 网络设置
http.port: 9200                                    # 端口

2)启动并查看

[root@elk-node1 ~]# chown -R elasticsearch.elasticsearch /data/
[root@elk-node1 ~]# systemctl start elasticsearch
[root@elk-node1 ~]# systemctl status elasticsearch
CGroup: /system.slice/elasticsearch.service
└─3005 /bin/java -Xms256m -Xmx1g -Djava.awt.headless=true -XX:+UseParNewGC -XX:+UseConcMarkSweepGC -XX:CMSI...

注意:上面可以看出elasticsearch设置的内存最小256m,最大1g

[root@linux-node1 src]# netstat -antlp |egrep "9200|9300"
tcp6 0 0 :::9200 :::* LISTEN 3005/java 
tcp6 0 0 :::9300 :::* LISTEN 3005/java

然后通过web访问(访问的浏览器最好用google浏览器)
在Centos7上部署ELK实时日志分析平台_第2张图片

http://112.110.115.10:19200/

3)通过命令的方式查看数据(在112.110.115.10宿主机或其他外网服务器上查看,如下)

[root@kvm-server src]# curl -i -XGET 'http://192.168.1.160:9200/_count?pretty' -d '{"query":{"match_all":{}}}'
HTTP/1.1 200 OK
Content-Type: application/json; charset=UTF-8
Content-Length: 95
{
"count" : 0,
"_shards" : {
"total" : 0,
"successful" : 0,
"failed" : 0
}
}

这样感觉用命令来查看,特别的不爽。

4)接下来安装插件,使用插件进行查看 (下面两个插件要在elk-node1和elk-node2上都要安装)

4.1)安装head插件

a)插件安装方法一

[root@elk-node1 src]# /usr/share/elasticsearch/bin/plugin install mobz/elasticsearch-head

b)插件安装方法二

首先下载head插件,下载到/usr/loca/src目录下

下载地址:https://github.com/mobz/elasticsearch-head

[root@elk-node1 src]# unzip elasticsearch-head-master.zip
[root@elk-node1 src]# ls
elasticsearch-head-master elasticsearch-head-master.zip

在/usr/share/elasticsearch/plugins目录下创建head目录

然后将上面下载的elasticsearch-head-master.zip解压后的文件都移到/usr/share/elasticsearch/plugins/head下,接着重启elasticsearch服务即可!

[root@elk-node1 src]# cd /usr/share/elasticsearch/plugins/
[root@elk-node1 plugins]# mkdir head
[root@elk-node1 plugins]# ls
head
[root@elk-node1 plugins]# cd head
[root@elk-node1 head]# cp -r /usr/local/src/elasticsearch-head-master/* ./
[root@elk-node1 head]# pwd
/usr/share/elasticsearch/plugins/head

[root@elk-node1 head]# chown -R elasticsearch:elasticsearch /usr/share/elasticsearch/plugins
[root@elk-node1 head]# ll
total 40
-rw-r--r--. 1 elasticsearch elasticsearch 104 Sep 28 01:57 elasticsearch-head.sublime-project
-rw-r--r--. 1 elasticsearch elasticsearch 2171 Sep 28 01:57 Gruntfile.js
-rw-r--r--. 1 elasticsearch elasticsearch 3482 Sep 28 01:57 grunt_fileSets.js
-rw-r--r--. 1 elasticsearch elasticsearch 1085 Sep 28 01:57 index.html
-rw-r--r--. 1 elasticsearch elasticsearch 559 Sep 28 01:57 LICENCE
-rw-r--r--. 1 elasticsearch elasticsearch 795 Sep 28 01:57 package.json
-rw-r--r--. 1 elasticsearch elasticsearch 100 Sep 28 01:57 plugin-descriptor.properties
-rw-r--r--. 1 elasticsearch elasticsearch 5211 Sep 28 01:57 README.textile
drwxr-xr-x. 5 elasticsearch elasticsearch 4096 Sep 28 01:57 _site
drwxr-xr-x. 4 elasticsearch elasticsearch 29 Sep 28 01:57 src
drwxr-xr-x. 4 elasticsearch elasticsearch 66 Sep 28 01:57 test

[root@elk-node1 _site]# systemctl restart elasticsearch

插件访问(最好提前将elk-node2节点的配置和插件都安装后,再来进行访问和数据插入测试)

http://112.110.115.10:19200/_plugin/head/

在Centos7上部署ELK实时日志分析平台_第3张图片

先插入数据实例,测试下

如下:打开”复合查询“,在POST选项下,任意输入如/index-demo/test,然后在下面输入数据(注意内容之间换行的逗号不要漏掉);

数据输入好之后(如下输入wangshibo;hello world内容),下面点击”验证JSON“->”提交请求“,提交成功后,观察右栏里出现的信息:有index,type,version等信息,failed:0(成功消息)

再查看测试实例,如下:

"复合查询"下,选择GET选项,在/index-demo/test/后面输入上面POST结果中的id号,不输入内容,即{}括号里为空!

然后点击”验证JSON“->"提交请求",观察右栏内就有了上面插入的数据了(即wangshibo,hello world)

打开"基本查询",查看下数据,如下,即可查询到上面插入的数据:
在Centos7上部署ELK实时日志分析平台_第4张图片

打开“数据浏览”,也能查看到插入的数据:
在Centos7上部署ELK实时日志分析平台_第5张图片

如下:一定要提前在elk-node2节点上也完成配置(配置内容在下面提到),否则上面插入数据后,集群状态会呈现×××yellow状态,elk-node2完成配置加入到集群里后就会恢复到正常的绿色状态。
在Centos7上部署ELK实时日志分析平台_第6张图片

4.2)安装kopf监控插件

a)监控插件安装方法一

[root@elk-node1 src]# /usr/share/elasticsearch/bin/plugin install lmenezes/elasticsearch-kopf

b)监控插件安装方法二

首先下载监控插件kopf,下载到/usr/loca/src目录下

下载地址:https://github.com/lmenezes/elasticsearch-kopf

[root@elk-node1 src]# unzip elasticsearch-kopf-master.zip
[root@elk-node1 src]# ls
elasticsearch-kopf-master elasticsearch-kopf-master.zip

在/usr/share/elasticsearch/plugins目录下创建kopf目录

然后将上面下载的elasticsearch-kopf-master.zip解压后的文件都移到/usr/share/elasticsearch/plugins/kopf下,接着重启elasticsearch服务即可!

[root@elk-node1 src]# cd /usr/share/elasticsearch/plugins/
[root@elk-node1 plugins]# mkdir kopf
[root@elk-node1 plugins]# cd kopf
[root@elk-node1 kopf]# cp -r /usr/local/src/elasticsearch-kopf-master/* ./
[root@elk-node1 kopf]# pwd
/usr/share/elasticsearch/plugins/kopf

[root@elk-node1 kopf]# chown -R elasticsearch:elasticsearch /usr/share/elasticsearch/plugins
[root@elk-node1 kopf]# ll
total 40
-rw-r--r--. 1 elasticsearch elasticsearch 237 Sep 28 16:28 CHANGELOG.md
drwxr-xr-x. 2 elasticsearch elasticsearch 22 Sep 28 16:28 dataset
drwxr-xr-x. 2 elasticsearch elasticsearch 73 Sep 28 16:28 docker
-rw-r--r--. 1 elasticsearch elasticsearch 4315 Sep 28 16:28 Gruntfile.js
drwxr-xr-x. 2 elasticsearch elasticsearch 4096 Sep 28 16:28 imgs
-rw-r--r--. 1 elasticsearch elasticsearch 1083 Sep 28 16:28 LICENSE
-rw-r--r--. 1 elasticsearch elasticsearch 1276 Sep 28 16:28 package.json
-rw-r--r--. 1 elasticsearch elasticsearch 102 Sep 28 16:28 plugin-descriptor.properties
-rw-r--r--. 1 elasticsearch elasticsearch 3165 Sep 28 16:28 README.md
drwxr-xr-x. 6 elasticsearch elasticsearch 4096 Sep 28 16:28 _site
drwxr-xr-x. 4 elasticsearch elasticsearch 27 Sep 28 16:28 src
drwxr-xr-x. 4 elasticsearch elasticsearch 4096 Sep 28 16:28 tests

[root@elk-node1 _site]# systemctl restart elasticsearch

访问插件:(如下,同样要提前安装好elk-node2节点上的插件,否则访问时会出现集群节点为×××的yellow告警状态)

http://112.110.115.10:19200/_plugin/kopf/#!/cluster

在Centos7上部署ELK实时日志分析平台_第7张图片

下面进行节点elk-node2的配置 (如上的两个插件也在elk-node2上同样安装)

注释:其实两个的安装配置基本上是一样的。

[root@elk-node2 src]# mkdir -p /data/es-data 
[root@elk-node2 ~]# cat /etc/elasticsearch/elasticsearch.yml
cluster.name: huanqiu 
node.name: elk-node2
path.data: /data/es-data 
path.logs: /var/log/elasticsearch/ 
bootstrap.mlockall: true 
network.host: 0.0.0.0 
http.port: 9200 
discovery.zen.ping.multicast.enabled: false
discovery.zen.ping.unicast.hosts: ["192.168.1.160", "192.168.1.161"]

# 修改权限配置
[root@elk-node2 src]# chown -R elasticsearch.elasticsearch /data/

# 启动服务
[root@elk-node2 src]# systemctl start elasticsearch
[root@elk-node2 src]# systemctl status elasticsearch
● elasticsearch.service - Elasticsearch
Loaded: loaded (/usr/lib/systemd/system/elasticsearch.service; enabled; vendor preset: disabled)
Active: active (running) since Wed 2016-09-28 16:49:41 CST; 1 weeks 3 days ago
Docs: http://www.elastic.co
Process: 17798 ExecStartPre=/usr/share/elasticsearch/bin/elasticsearch-systemd-pre-exec (code=exited, status=0/SUCCESS)
Main PID: 17800 (java)
CGroup: /system.slice/elasticsearch.service
└─17800 /bin/java -Xms256m -Xmx1g -Djava.awt.headless=true -XX:+UseParNewGC -XX:+UseConcMarkSweepGC -XX:CMSInitiatingOccupancyFra...

Oct 09 13:42:22 elk-node2 elasticsearch[17800]: [2016-10-09 13:42:22,295][WARN ][transport ] [elk-node2] Transport res...943817]
Oct 09 13:42:23 elk-node2 elasticsearch[17800]: [2016-10-09 13:42:23,111][WARN ][transport ] [elk-node2] Transport res...943846]
......

# 查看端口
[root@elk-node2 src]# netstat -antlp|egrep "9200|9300"
tcp6 0 0 :::9200 :::* LISTEN 2928/java 
tcp6 0 0 :::9300 :::* LISTEN 2928/java 
tcp6 0 0 127.0.0.1:48200 127.0.0.1:9300 TIME_WAIT - 
tcp6 0 0 ::1:41892 ::1:9300 TIME_WAIT -

通过命令的方式查看elk-node2数据(在112.110.115.10宿主机或其他外网服务器上查看,如下)

[root@kvm-server ~]# curl -i -XGET 'http://192.168.1.161:9200/_count?pretty' -d '{"query":{"match_all":{}}}'
HTTP/1.1 200 OK
Content-Type: application/json; charset=UTF-8
Content-Length: 95

{
"count" : 1,
"_shards" : {
"total" : 5,
"successful" : 5,
"failed" : 0
}

然后通过web访问elk-node2

http://112.110.115.10:19201/

访问两个插件:

http://112.110.115.10:19201/_plugin/head/

http://112.110.115.10:19201/_plugin/kopf/#!/cluster

这里几图和elk-node1基本相同,这里不再操作。

(2)Logstash安装配置(这个在客户机上是要安装的。elk-node1和elk-node2都安装)

基础环境安装(客户端安装logstash,收集到的数据写入到elasticsearch里,就可以登陆logstash界面查看到了)

1)下载并安装GPG Key

[root@elk-node1 ~]# rpm --import https://packages.elastic.co/GPG-KEY-elasticsearch

2)添加yum仓库

[root@hadoop-node1 ~]# vim /etc/yum.repos.d/logstash.repo
[logstash-2.1]
name=Logstash repository for 2.1.x packages
baseurl=http://packages.elastic.co/logstash/2.1/centos
gpgcheck=1
gpgkey=http://packages.elastic.co/GPG-KEY-elasticsearch
enabled=1

3)安装logstash

[root@elk-node1 ~]# yum install -y logstash

4)logstash启动

[root@elk-node1 ~]# systemctl start elasticsearch
[root@elk-node1 ~]# systemctl status elasticsearch
● elasticsearch.service - Elasticsearch
Loaded: loaded (/usr/lib/systemd/system/elasticsearch.service; disabled; vendor preset: disabled)
Active: active (running) since Mon 2016-11-07 18:33:28 CST; 3 days ago
Docs: http://www.elastic.co
Main PID: 8275 (java)
CGroup: /system.slice/elasticsearch.service
└─8275 /bin/java -Xms256m -Xmx1g -Djava.awt.headless=true -XX:+UseParNewGC -XX:+UseConcMarkSweepGC -XX:CMSInitiatingOccupancyFrac...

数据的测试

1)基本的输入输出

[root@elk-node1 ~]# /opt/logstash/bin/logstash -e 'input { stdin{} } output { stdout{} }'
Settings: Default filter workers: 1
Logstash startup completed
hello                                                                                     #输入这个
2016-11-11T06:41:07.690Z elk-node1 hello                        #输出这个
wangshibo                                                                            #输入这个
2016-11-11T06:41:10.608Z elk-node1 wangshibo               #输出这个

2)使用rubydebug详细输出

[root@elk-node1 ~]# /opt/logstash/bin/logstash -e 'input { stdin{} } output { stdout{ codec => rubydebug} }'
Settings: Default filter workers: 1
Logstash startup completed
hello                                                                                    #输入这个
{                                                                                         #输出下面信息
           "message" => "hello",
           "@version" => "1",
      "@timestamp" => "2016-11-11T06:44:06.711Z",
                  "host" => "elk-node1"
}
wangshibo                                                                         #输入这个
{                                                                                       #输出下面信息
         "message" => "wangshibo",
        "@version" => "1",
   "@timestamp" => "2016-11-11T06:44:11.270Z",
               "host" => "elk-node1"
}

3) 把内容写到elasticsearch中

[root@elk-node1 ~]# /opt/logstash/bin/logstash -e 'input { stdin{} } output { elasticsearch { hosts => ["192.168.1.160:9200"]} }'
Settings: Default filter workers: 1
Logstash startup completed                       #输入下面的测试数据
123456 
wangshibo
huanqiu
hahaha

使用rubydebug和写到elasticsearch中的区别:

其实就在于后面标准输出的区别,前者使用codec;后者使用elasticsearch

写到elasticsearch中在logstash中查看,如下图:

注意:

master收集到日志后,会把一部分数据碎片到salve上(随机的一部分数据),master和slave又都会各自做副本,并把副本放到对方机器上,这样就保证了数据不会丢失。如下,master收集到的数据放到了自己的第1,3分片上,其他的放到了slave的第0,2,4分片上。
在Centos7上部署ELK实时日志分析平台_第8张图片

在Centos7上部署ELK实时日志分析平台_第9张图片

4)即写到elasticsearch中又写在文件中一份

[root@elk-node1 ~]# /opt/logstash/bin/logstash -e 'input { stdin{} } output { elasticsearch { hosts => ["192.168.1.160:9200"]} stdout{ codec => rubydebug}}'
Settings: Default filter workers: 1
Logstash startup completed
huanqiupc
{
           "message" => "huanqiupc",
          "@version" => "1",
     "@timestamp" => "2016-11-11T07:27:42.012Z",
                 "host" => "elk-node1"
}
wangshiboqun
{
         "message" => "wangshiboqun",
        "@version" => "1",
   "@timestamp" => "2016-11-11T07:27:55.396Z",
               "host" => "elk-node1"
}

以上文本可以长期保留、操作简单、压缩比大。下面登陆elasticsearch界面中查看;
在Centos7上部署ELK实时日志分析平台_第10张图片

logstash的配置和文件的编写

1)logstash的配置

简单的配置方式:

[root@elk-node1 ~]# vim /etc/logstash/conf.d/01-logstash.conf
input { stdin { } }
output {
        elasticsearch { hosts => ["192.168.1.160:9200"]}
        stdout { codec => rubydebug }
}

它的执行:

[root@elk-node1 ~]# /opt/logstash/bin/logstash -f /etc/logstash/conf.d/01-logstash.conf
Settings: Default filter workers: 1
Logstash startup completed
beijing                                                #输入内容
{                                                       #输出下面信息
             "message" => "beijing",
            "@version" => "1",
       "@timestamp" => "2016-11-11T07:41:48.401Z",
                   "host" => "elk-node1"
}

在Centos7上部署ELK实时日志分析平台_第11张图片

2)收集系统日志

[root@elk-node1 ~]# vim  file.conf
input {
    file {
      path => "/var/log/messages"
      type => "system"
      start_position => "beginning"
    }
}

output {
    elasticsearch {
       hosts => ["192.168.1.160:9200"]
       index => "system-%{+YYYY.MM.dd}"
    }
}

执行上面日志信息的收集,如下,这个命令会一直在执行中,表示日志在监控收集中;如果中断,就表示日志不在收集!所以需要放在后台执行~

[root@elk-node1 ~]# /opt/logstash/bin/logstash -f file.conf &

登陆elasticsearch界面,查看本机系统日志的信息:
在Centos7上部署ELK实时日志分析平台_第12张图片

在Centos7上部署ELK实时日志分析平台_第13张图片

3)收集java日志,其中包含上面讲到的日志收集

[root@elk-node1 ~]# vim  file.conf
input {
    file {
      path => "/var/log/messages"
      type => "system"
      start_position => "beginning"
    }
}

input {
    file {
       path => "/var/log/elasticsearch/huanqiu.log"
       type => "es-error"
       start_position => "beginning"
    }
}

output {

    if [type] == "system"{
        elasticsearch {
           hosts => ["192.168.1.160:9200"]
           index => "system-%{+YYYY.MM.dd}"
        }
    }

    if [type] == "es-error"{
        elasticsearch {
           hosts => ["192.168.1.160:9200"]
           index => "es-error-%{+YYYY.MM.dd}"
        }
    }
}

注意:

如果你的日志中有type字段,那你就不能在conf文件中使用type

执行如下命令收集:

[root@elk-node1 ~]# /opt/logstash/bin/logstash -f file.conf &

登陆elasticsearch界面,查看数据:
在Centos7上部署ELK实时日志分析平台_第14张图片

有个问题:

每个报错都给收集成一行了,不是按照一个报错,一个事件模块收集的。

下面将行换成事件的方式展示:

[root@elk-node1 ~]# vim multiline.conf
input {
    stdin {
       codec => multiline {
          pattern => "^\["
          negate => true
          what => "previous"
        }
    }
}
output {
    stdout {
      codec => "rubydebug"
     } 
}
执行命令:

[root@elk-node1 ~]# /opt/logstash/bin/logstash -f multiline.conf
Settings: Default filter workers: 1
Logstash startup completed
123
456
[123
{
    "@timestamp" => "2016-11-11T09:28:56.824Z",
       "message" => "123\n456",
      "@version" => "1",
          "tags" => [
        [0] "multiline"
    ],
          "host" => "elk-node1"
}
123]
[456]
{
    "@timestamp" => "2016-11-11T09:29:09.043Z",
       "message" => "[123\n123]",
      "@version" => "1",
          "tags" => [
        [0] "multiline"
    ],
          "host" => "elk-node1"
}

在没有遇到[的时候,系统不会收集,只有遇见[的时候,才算是一个事件,才收集起来。

(3)Kibana安装配置

1)kibana的安装:

[root@elk-node1 ~]# cd /usr/local/src
[root@elk-node1 src]# wget https://download.elastic.co/kibana/kibana/kibana-4.3.1-linux-x64.tar.gz
[root@elk-node1 src]# tar zxf kibana-4.3.1-linux-x64.tar.gz
[root@elk-node1 src]# mv kibana-4.3.1-linux-x64 /usr/local/
[root@elk-node1 src]# ln -s /usr/local/kibana-4.3.1-linux-x64/ /usr/local/kibana

2)修改配置文件:

[root@elk-node1 config]# pwd
/usr/local/kibana/config
[root@elk-node1 config]# cp kibana.yml kibana.yml.bak
[root@elk-node1 config]# vim kibana.yml 
server.port: 5601
server.host: "0.0.0.0"
elasticsearch.url: "http://192.168.1.160:9200"
kibana.index: ".kibana"

因为他一直运行在前台,要么选择开一个窗口,要么选择使用screen。

安装并使用screen启动kibana:

[root@elk-node1 ~]# yum -y install screen
[root@elk-node1 ~]# screen                          #这样就另开启了一个终端窗口
[root@elk-node1 ~]# /usr/local/kibana/bin/kibana
log [18:23:19.867] [info][status][plugin:kibana] Status changed from uninitialized to green - Ready
log [18:23:19.911] [info][status][plugin:elasticsearch] Status changed from uninitialized to yellow - Waiting for Elasticsearch
log [18:23:19.941] [info][status][plugin:kbn_vislib_vis_types] Status changed from uninitialized to green - Ready
log [18:23:19.953] [info][status][plugin:markdown_vis] Status changed from uninitialized to green - Ready
log [18:23:19.963] [info][status][plugin:metric_vis] Status changed from uninitialized to green - Ready
log [18:23:19.995] [info][status][plugin:spyModes] Status changed from uninitialized to green - Ready
log [18:23:20.004] [info][status][plugin:statusPage] Status changed from uninitialized to green - Ready
log [18:23:20.010] [info][status][plugin:table_vis] Status changed from uninitialized to green - Ready

然后按ctrl+a+d组合键,这样在上面另启的screen屏里启动的kibana服务就一直运行在前台了

[root@elk-node1 ~]# screen -ls
There is a screen on:
15041.pts-0.elk-node1 (Detached)
1 Socket in /var/run/screen/S-root.

(3)访问kibana:http://112.110.115.10:15601/

如下,如果是添加上面设置的java日志收集信息,则在下面填写es-error;如果是添加上面设置的系统日志信息system,以此类型(可以从logstash界面看到日志收集项)

然后点击上面的Discover,在Discover中查看:

查看日志登陆,需要点击“Discover”-->"message",点击它后面的“add”

注意:

需要右边查看日志内容时带什么属性,就在左边点击相应属性后面的“add”
如下图,添加了message和path的属性:
在Centos7上部署ELK实时日志分析平台_第15张图片

这样,右边显示的日志内容的属性就带了message和path
在Centos7上部署ELK实时日志分析平台_第16张图片
点击右边日志内容属性后面隐藏的<<,就可将内容向前缩进

添加新的日志采集项,点击Settings->+Add New,比如添加system系统日志。注意后面的*不要忘了。
在Centos7上部署ELK实时日志分析平台_第17张图片在Centos7上部署ELK实时日志分析平台_第18张图片
在Centos7上部署ELK实时日志分析平台_第19张图片

删除kibana里的日志采集项,如下,点击删除图标即可。
在Centos7上部署ELK实时日志分析平台_第20张图片

如果打开kibana查看日志,发现没有日志内容,出现“No results found”,如下图所示,这说明要查看的日志在当前时间没有日志信息输出,可以点击右上角的时间钟来调试日志信息的查看。

在Centos7上部署ELK实时日志分析平台_第21张图片
在Centos7上部署ELK实时日志分析平台_第22张图片

4)收集nginx的访问日志

修改nginx的配置文件,分别在nginx.conf的http和server配置区域添加下面内容:

http 标签中

log_format json '{"@timestamp":"$time_iso8601",'
                           '"@version":"1",'
                           '"client":"$remote_addr",'
                           '"url":"$uri",'
                           '"status":"$status",'
                           '"domain":"$host",'
                           '"host":"$server_addr",'
                           '"size":$body_bytes_sent,'
                           '"responsetime":$request_time,'
                           '"referer": "$http_referer",'
                           '"ua": "$http_user_agent"'
'}';
##### server标签中
            access_log /var/log/nginx/access_json.log json;

截图如下:
在Centos7上部署ELK实时日志分析平台_第23张图片

启动nginx服务:

[root@elk-node1 ~]# systemctl start nginx
[root@elk-node1 ~]# systemctl status nginx
● nginx.service - The nginx HTTP and reverse proxy server
   Loaded: loaded (/usr/lib/systemd/system/nginx.service; disabled; vendor preset: disabled)
   Active: active (running) since Fri 2016-11-11 19:06:55 CST; 3s ago
  Process: 15119 ExecStart=/usr/sbin/nginx (code=exited, status=0/SUCCESS)
  Process: 15116 ExecStartPre=/usr/sbin/nginx -t (code=exited, status=0/SUCCESS)
  Process: 15114 ExecStartPre=/usr/bin/rm -f /run/nginx.pid (code=exited, status=0/SUCCESS)
 Main PID: 15122 (nginx)
   CGroup: /system.slice/nginx.service
           ├─15122 nginx: master process /usr/sbin/nginx
           ├─15123 nginx: worker process
           └─15124 nginx: worker process

Nov 11 19:06:54 elk-node1 systemd[1]: Starting The nginx HTTP and reverse proxy server...
Nov 11 19:06:55 elk-node1 nginx[15116]: nginx: the configuration file /etc/nginx/nginx.conf syntax is ok
Nov 11 19:06:55 elk-node1 nginx[15116]: nginx: configuration file /etc/nginx/nginx.conf test is successful
Nov 11 19:06:55 elk-node1 systemd[1]: Started The nginx HTTP and reverse proxy server.

编写收集文件,这次使用json的方式收集:

[root@elk-node1 ~]# vim json.conf
input {
   file {
      path => "/var/log/nginx/access_json.log"
      codec => "json"
   }
}

output {
   stdout {
      codec => "rubydebug"
   }
}
启动日志收集程序:
[root@elk-node1 ~]# /opt/logstash/bin/logstash -f json.conf        #或加个&放在后台执行

访问nginx页面(在elk-node1的宿主机上执行访问页面的命令:curl http://192.168.1.160)就会出现以下内容:

[root@elk-node1 ~]# /opt/logstash/bin/logstash -f json.conf
Settings: Default filter workers: 1
Logstash startup completed
{
      "@timestamp" => "2016-11-11T11:10:53.000Z",
        "@version" => "1",
          "client" => "192.168.1.7",
             "url" => "/index.html",
          "status" => "200",
          "domain" => "192.168.1.160",
            "host" => "192.168.1.160",
            "size" => 3700,
    "responsetime" => 0.0,
         "referer" => "-",
              "ua" => "curl/7.19.7 (x86_64-redhat-linux-gnu) libcurl/7.19.7 NSS/3.14.0.0 zlib/1.2.3 libidn/1.18 libssh2/1.4.2",
            "path" => "/var/log/nginx/access_json.log"
}

注意:

上面的json.conf配置只是将nginx日志输出,还没有输入到elasticsearch里,所以这个时候在elasticsearch界面里是采集不到nginx日志的。

需要配置一下,将nginx日志输入到elasticsearch中,将其汇总到总文件file.conf里,如下也将nginx-log日志输入到elasticserach里:(后续就可以只用这个汇总文件,把要追加的日志汇总到这个总文件里即可)

[root@elk-node1 ~]# cat file.conf
input {
    file {
      path => "/var/log/messages"
      type => "system"
      start_position => "beginning"
    }

    file {
       path => "/var/log/elasticsearch/huanqiu.log"
       type => "es-error"
       start_position => "beginning"
       codec => multiline {
           pattern => "^\["
           negate => true
           what => "previous"
       }
    }
    file {
       path => "/var/log/nginx/access_json.log"
       codec => json
       start_position => "beginning"
       type => "nginx-log"
    }
}

output {

    if [type] == "system"{
        elasticsearch {
           hosts => ["192.168.1.160:9200"]
           index => "system-%{+YYYY.MM.dd}"
        }
    }

    if [type] == "es-error"{
        elasticsearch {
           hosts => ["192.168.1.160:9200"]
           index => "es-error-%{+YYYY.MM.dd}"
        }
    }
    if [type] == "nginx-log"{
        elasticsearch {
           hosts => ["192.168.1.160:9200"]
           index => "nignx-log-%{+YYYY.MM.dd}"
        }
    }
}

可以加上--configtest参数,测试下配置文件是否有语法错误或配置不当的地方,这个很重要!!

[root@elk-node1 ~]# /opt/logstash/bin/logstash -f file.conf --configtest
Configuration OK

然后接着执行logstash命令(由于上面已经将这个执行命令放到了后台,所以这里其实不用执行,也可以先kill之前的,再放后台执行),然后可以再访问nginx界面测试下

[root@elk-node1 ~]# /opt/logstash/bin/logstash -f file.conf &

登陆elasticsearch界面查看:

将nginx日志整合到kibana界面里,如下:
在Centos7上部署ELK实时日志分析平台_第24张图片

5)收集系统日志

编写收集文件并执行。

[root@elk-node1 ~]# cat syslog.conf
input {
    syslog {
        type => "system-syslog"
        host => "192.168.1.160"
        port => "514"
    }
}

output {
    stdout {
        codec => "rubydebug"
    }
}

对上面的采集文件进行执行:

[root@elk-node1 ~]# /opt/logstash/bin/logstash -f syslog.conf

重新开启一个窗口,查看服务是否启动:

[root@elk-node1 ~]# netstat -ntlp|grep 514
tcp6 0 0 192.168.1.160:514 :::* LISTEN 17842/java 
[root@elk-node1 ~]# vim /etc/rsyslog.conf
#*.* @@remote-host:514                                                           【在此行下面添加如下内容】
*.* @@192.168.1.160:514

[root@elk-node1 ~]# systemctl restart rsyslog

回到原来的窗口(即上面采集文件的执行终端),就会出现数据:

[root@elk-node1 ~]# /opt/logstash/bin/logstash -f syslog.conf
Settings: Default filter workers: 1
Logstash startup completed
{
           "message" => "Stopping System Logging Service...\n",
          "@version" => "1",
        "@timestamp" => "2016-11-13T10:35:30.000Z",
              "type" => "system-syslog",
              "host" => "192.168.1.160",
          "priority" => 30,
         "timestamp" => "Nov 13 18:35:30",
         "logsource" => "elk-node1",
           "program" => "systemd",
          "severity" => 6,
          "facility" => 3,
    "facility_label" => "system",
    "severity_label" => "Informational"
}

再次添加到总文件file.conf中:

[root@elk-node1 ~]# cat file.conf
input {
    file {
      path => "/var/log/messages"
      type => "system"
      start_position => "beginning"
    }

    file {
       path => "/var/log/elasticsearch/huanqiu.log"
       type => "es-error"
       start_position => "beginning"
       codec => multiline {
           pattern => "^\["
           negate => true
           what => "previous"
       }
    }
    file {
       path => "/var/log/nginx/access_json.log"
       codec => json
       start_position => "beginning"
       type => "nginx-log"
    }
    syslog {
        type => "system-syslog"
        host => "192.168.1.160"
        port => "514"
    }
}

output {

    if [type] == "system"{
        elasticsearch {
           hosts => ["192.168.1.160:9200"]
           index => "system-%{+YYYY.MM.dd}"
        }
    }

    if [type] == "es-error"{
        elasticsearch {
           hosts => ["192.168.1.160:9200"]
           index => "es-error-%{+YYYY.MM.dd}"
        }
    }
    if [type] == "nginx-log"{
        elasticsearch {
           hosts => ["192.168.1.160:9200"]
           index => "nignx-log-%{+YYYY.MM.dd}"
        }
    }
    if [type] == "system-syslog"{
        elasticsearch {
           hosts => ["192.168.1.160:9200"]
           index => "system-syslog-%{+YYYY.MM.dd}"
        }
    }
}

执行总文件(先测试下总文件配置是否有误,然后先kill之前在后台启动的file.conf文件,再次执行):

[root@elk-node1 ~]# /opt/logstash/bin/logstash -f file.conf --configtest
Configuration OK
[root@elk-node1 ~]# /opt/logstash/bin/logstash -f file.conf &

测试:

向日志中添加数据,看elasticsearch和kibana的变化:

[root@elk-node1 ~]# logger "hehehehehehe1"
[root@elk-node1 ~]# logger "hehehehehehe2"
[root@elk-node1 ~]# logger "hehehehehehe3"
[root@elk-node1 ~]# logger "hehehehehehe4"
[root@elk-node1 ~]# logger "hehehehehehe5"

在Centos7上部署ELK实时日志分析平台_第25张图片

添加到kibana界面中:

在Centos7上部署ELK实时日志分析平台_第26张图片

在Centos7上部署ELK实时日志分析平台_第27张图片

6)TCP日志的收集

编写日志收集文件,并执行:(有需要的话,可以将下面收集文件的配置汇总到上面的总文件file.conf里,进而输入到elasticsearch界面里和kibana里查看)

[root@elk-node1 ~]# cat tcp.conf
input {
tcp {
host => "192.168.1.160"
port => "6666"
}
}
output {
stdout {
codec => "rubydebug"
}
}

[root@elk-node1 ~]# /opt/logstash/bin/logstash -f tcp.conf

开启另外一个窗口,测试一(安装nc命令:yum install -y nc):

[root@elk-node1 ~]# nc 192.168.1.160 6666 

回到原来的窗口(即上面采集文件的执行终端),就会出现数据:

[root@elk-node1 ~]# /opt/logstash/bin/logstash -f tcp.conf 
Settings: Default filter workers: 1
Logstash startup completed
{
        "message" => "",
       "@version" => "1",
   "@timestamp" => "2016-11-13T11:01:15.280Z",
              "host" => "192.168.1.160",
              "port" => 49743
}

测试二:

[root@elk-node1 ~]# echo "hehe" | nc 192.168.1.160 6666
[root@elk-node1 ~]# echo "hehe" > /dev/tcp/192.168.1.160/6666

回到之前的执行端口,在去查看,就会显示出来:

[root@elk-node1 ~]# /opt/logstash/bin/logstash -f tcp.conf
Settings: Default filter workers: 1
Logstash startup completed
....... { "message" => "hehe", "@version" => "1", "@timestamp" => "2016-11-13T11:39:58.263Z", "host" => "192.168.1.160", "port" => 53432 } { "message" => "hehe", "@version" => "1", "@timestamp" => "2016-11-13T11:40:13.458Z", "host" => "192.168.1.160", "port" => 53457 }

7)使用filter

编写文件:

[root@elk-node1 ~]# cat grok.conf
input {
    stdin{}
}
filter {
  grok {
    match => { "message" => "%{IP:client} %{WORD:method} %{URIPATHPARAM:request} %{NUMBER:bytes} %{NUMBER:duration}" }
  }
}
output {
    stdout{
        codec => "rubydebug"
    }
}

执行检测:

[root@elk-node1 ~]# /opt/logstash/bin/logstash -f grok.conf
Settings: Default filter workers: 1
Logstash startup completed
55.3.244.1 GET /index.html 15824 0.043    #输入这个,下面就会自动形成字典的形式

{
       "message" => "55.3.244.1 GET /index.html 15824 0.043",
      "@version" => "1",
    "@timestamp" => "2016-11-13T11:45:47.882Z",
          "host" => "elk-node1",
        "client" => "55.3.244.1",
        "method" => "GET",
       "request" => "/index.html",
         "bytes" => "15824",
      "duration" => "0.043"
}

其实上面使用的那些变量在程序中都有定义:

[root@elk-node1 ~]# cd /opt/logstash/vendor/bundle/jruby/1.9/gems/logstash-patterns-core-2.0.2/patterns/
[root@elk-node1 patterns]# ls
aws     bro   firewalls      haproxy  junos         mcollective           mongodb  postgresql  redis
bacula  exim  grok-patterns  java     linux-syslog  mcollective-patterns  nagios   rails       ruby
[root@elk-node1 patterns]# cat grok-patterns
filter {
      # drop sleep events
    grok {
        match => { "message" =>"SELECT SLEEP" }
        add_tag => [ "sleep_drop" ]
        tag_on_failure => [] # prevent default _grokparsefailure tag on real records
      }
     if "sleep_drop" in [tags] {
        drop {}
     }
     grok {
        match => [ "message", "(?m)^# User@Host: %{USER:user}
[^
[^
]+\] @ (?:(?\S*) )?
(?:
(?:
\s+Id: %{NUMBER:row_id:int}\s*# Query_time: %{NUMBER:query_time:float}\s+Lock_time: %{NUMBER:lock_time:float}\s+Rows_sent: %{NUMBER:rows_sent:int}\s+Rows_examined: %{NUMBER:rows_examined:int}\s*(?:use %{DATA:database};\s*)?SET timestamp=%{NUMBER:timestamp};\s*(?(?\w+)\s+.*)\n#\s*" ]
      }
      date {
        match => [ "timestamp", "UNIX" ]
        remove_field => [ "timestamp" ]
      }
}

8)mysql慢查询

收集文件:

[root@elk-node1 ~]# cat mysql-slow.conf
input {
    file {
        path => "/root/slow.log"
        type => "mysql-slowlog"
        codec => multiline {
            pattern => "^# User@Host"
            negate => true
            what => "previous"
        }
    }
}

filter {
      # drop sleep events
    grok {
        match => { "message" =>"SELECT SLEEP" }
        add_tag => [ "sleep_drop" ]
        tag_on_failure => [] # prevent default _grokparsefailure tag on real records
      }
     if "sleep_drop" in [tags] {
        drop {}
     }
     grok {
        match => [ "message", "(?m)^# User@Host: %{USER:user}
[^
[^
]+\] @ (?:(?\S*) )?
(?:
(?:
\s+Id: %{NUMBER:row_id:int}\s*# Query_time: %{NUMBER:query_time:float}\s+Lock_time: %{NUMBER:lock_time:float}\s+Rows_sent: %{NUMBER:rows_sent:int}\s+Rows_examined: %{NUMBER:rows_examined:int}\s*(?:use %{DATA:database};\s*)?SET timestamp=%{NUMBER:timestamp};\s*(?(?\w+)\s+.*)\n#\s*" ]
      }
      date {
        match => [ "timestamp", "UNIX" ]
        remove_field => [ "timestamp" ]
      }
}

output {
    stdout {
       codec =>"rubydebug"
    }
}

执行检测:

上面需要的/root/slow.log是自己上传的,然后自己插入数据保存后,会显示:

[root@elk-node1 ~]# /opt/logstash/bin/logstash -f mysql-slow.conf
Settings: Default filter workers: 1
Logstash startup completed
{
    "@timestamp" => "2016-11-14T06:53:54.100Z",
       "message" => "# Time: 161114 11:05:18",
      "@version" => "1",
          "path" => "/root/slow.log",
          "host" => "elk-node1",
          "type" => "mysql-slowlog",
          "tags" => [
        [0] "_grokparsefailure"
    ]
}
{
    "@timestamp" => "2016-11-14T06:53:54.105Z",
       "message" => "# User@Host: test[test] @  [124.65.197.154]\n# Query_time: 1.725889  Lock_time: 0.000430 Rows_sent: 0  Rows_examined: 0\nuse test_zh_o2o_db;\nSET timestamp=1479092718;\nSELECT trigger_name, event_manipulation, event_object_table, action_statement, action_timing, DEFINER FROM information_schema.triggers WHERE BINARY event_object_schema='test_zh_o2o_db' AND BINARY event_object_table='customer';\n# Time: 161114 12:10:30",
      "@version" => "1",
          "tags" => [
        [0] "multiline",
        [1] "_grokparsefailure"
    ],
          "path" => "/root/slow.log",
          "host" => "elk-node1",
          "type" => "mysql-slowlog"
}

接下来描述会遇见到的一个问题:
一旦我们的elasticsearch出现问题,就不能进行日志采集处理了!
这种情况下该怎么办呢?

解决方案;
可以在client和elasticsearch之间添加一个中间件作为缓存,先将采集到的日志内容写到中间件上,然后再从中间件输入到elasticsearch中。
这就完美的解决了上述的问题了。

(4)ELK中使用redis作为中间件,缓存日志采集内容

1)redis的配置和启动

[root@elk-node1 ~]# vim /etc/redis.conf               #修改下面两行内容
daemonize yes
bind 192.168.1.160
[root@elk-node1 ~]# systemctl start redis
[root@elk-node1 ~]# lsof -i:6379
COMMAND PID USER FD TYPE DEVICE SIZE/OFF NODE NAME
redis-ser 19474 redis 4u IPv4 1344465 0t0 TCP elk-node1:6379 (LISTEN)
[root@elk-node1 ~]# redis-cli -h 192.168.1.160
192.168.1.160:6379> info
# Server
redis_version:2.8.19
.......

2)编写从Client端收集数据的文件

[root@elk-node1 ~]# vim redis-out.conf
input {
   stdin {}
}

output {
   redis {
      host => "192.168.1.160"
      port => "6379"
      db => "6"
      data_type => "list"
      key => "demo"
   }
}

3)执行收集数据的文件,并输入数据hello redis

[root@elk-node1 ~]# /opt/logstash/bin/logstash -f redis-out.conf 
Settings: Default filter workers: 1
Logstash startup completed             #下面输入数据hello redis
hello redis

4)在redis中查看数据

[root@elk-node1 ~]# redis-cli -h 192.168.1.160
192.168.1.160:6379> info
# Server
.......
.......
# Keyspace
db6:keys=1,expires=0,avg_ttl=0   #在最下面一行,显示是db6
192.168.1.160:6379> select 6
OK
192.168.1.160:6379[6]> keys *
1) "demo"
192.168.1.160:6379[6]> LINDEX demo -1
"{\"message\":\"hello redis\",\"@version\":\"1\",\"@timestamp\":\"2016-11-14T08:04:25.981Z\",\"host\":\"elk-node1\"}"

5)继续随便写点数据

[root@elk-node1 ~]# /opt/logstash/bin/logstash -f redis-out.conf
Settings: Default filter workers: 1
Logstash startup completed
hello redis
123456
asdf
ert
wang
shi
bo
guohuihui
as
we
r
g

asdfjkdfsak
5423wer
34rt3
6y
7uj
u
io9
sdjfhsdk890
huanqiu
huanqiuchain
hqsb
asda

6)在redis中查看

在redis中查看长度:

[root@elk-node1 ~]# redis-cli -h 192.168.1.160
192.168.1.160:6379> info
# Server
redis_version:2.8.19
.......
.......
# Keyspace
db6:keys=1,expires=0,avg_ttl=0      #显示是db6
192.168.1.160:6379> select 6
OK
192.168.1.160:6379[6]> keys *
1) "demo"
192.168.1.160:6379[6]> LLEN demo
(integer) 24

7)将redis中的内容写到ES中

[root@elk-node1 ~]# vim redis-in.conf
input {
    redis {
      host => "192.168.1.160"
      port => "6379"
      db => "6"
      data_type => "list"
      key => "demo"
   }
}

output {
    elasticsearch {
      hosts => ["192.168.1.160:9200"]
      index => "redis-in-%{+YYYY.MM.dd}"
    }
}

执行:

[root@elk-node1 ~]# /opt/logstash/bin/logstash -f redis-in.conf --configtest
Configuration OK
[root@elk-node1 ~]# /opt/logstash/bin/logstash -f redis-in.conf &

在redis中查看,发现数据已被读出:
192.168.1.160:6379[6]> LLEN demo
(integer) 0

登陆elasticsearch界面查看:
在Centos7上部署ELK实时日志分析平台_第28张图片

8)接着,将收集到的所有日志写入到redis中。这了重新定义一个添加redis缓存后的总文件shipper.conf。(可以将之前执行的总文件file.conf停掉)

[root@elk-node1 ~]# vim shipper.conf
input {
    file {
      path => "/var/log/messages"
      type => "system"
      start_position => "beginning"
    }

    file {
       path => "/var/log/elasticsearch/huanqiu.log"
       type => "es-error"
       start_position => "beginning"
       codec => multiline {
           pattern => "^\["
           negate => true
           what => "previous"
       }
    }
    file {
       path => "/var/log/nginx/access_json.log"
       codec => json
       start_position => "beginning"
       type => "nginx-log"
    }
    syslog {
        type => "system-syslog"
        host => "192.168.1.160"
        port => "514"
    }

}

output {
   if [type] == "system"{
     redis {
        host => "192.168.1.160"
        port => "6379"
        db => "6"
        data_type => "list"
        key => "system"
     }
   }

    if [type] == "es-error"{
      redis {
        host => "192.168.1.160"
        port => "6379"
        db => "6"
        data_type => "list"
        key => "demo"
        }
     }
    if [type] == "nginx-log"{   
       redis {
          host => "192.168.1.160"
          port => "6379"
          db => "6"
          data_type => "list"
          key => "nginx-log"
       }
    }
    if [type] == "system-syslog"{
       redis {
          host => "192.168.1.160"
          port => "6379"
          db => "6"
          data_type => "list"
          key => "system-syslog"
       }   
     }
}

执行上面的文件(提前将上面之前启动的file.conf文件的执行给结束掉!)

[root@elk-node1 ~]# /opt/logstash/bin/logstash -f shipper.conf --configtest
Configuration OK
[root@elk-node1 ~]# /opt/logstash/bin/logstash -f shipper.conf
Settings: Default filter workers: 1
Logstash startup completed

在redis中查看:

[root@elk-node1 ~]# redis-cli -h 192.168.1.160
192.168.1.160:6379> info
# Server
redis_version:2.8.19
.......
.......
# Keyspace
db6:keys=1,expires=0,avg_ttl=0                      #显示是db6
192.168.1.160:6379> select 6
OK
192.168.1.160:6379[6]> keys *
1) "demo"
2) "system"
192.168.1.160:6379[6]> keys *
1) "nginx-log"
2) "demo"
3) "system"

另开一个窗口,添加点日志:

[root@elk-node1 ~]# logger "12325423"
[root@elk-node1 ~]# logger "12325423"
[root@elk-node1 ~]# logger "12325423"
[root@elk-node1 ~]# logger "12325423"
[root@elk-node1 ~]# logger "12325423"
[root@elk-node1 ~]# logger "12325423"

又会增加日志:

192.168.1.160:6379[6]> keys *
1) "system-syslog"
2) "nginx-log"
3) "demo"
4) "system"

其实可以在任意的一台ES中将数据从redis读取到ES中。

下面咱们在elk-node2节点,将数据从redis读取到ES中:

编写文件:

[root@elk-node2 ~]# cat file.conf
input {
     redis {
        type => "system"
        host => "192.168.1.160"
        port => "6379"
        db => "6"
        data_type => "list"
        key => "system"
     }

      redis {
        type => "es-error"
        host => "192.168.1.160"
        port => "6379"
        db => "6"
        data_type => "list"
        key => "es-error"
        }
       redis {
          type => "nginx-log"
          host => "192.168.1.160"
          port => "6379"
          db => "6"
          data_type => "list"
          key => "nginx-log"
       }
       redis {
          type => "system-syslog"
          host => "192.168.1.160"
          port => "6379"
          db => "6"
          data_type => "list"
          key => "system-syslog"
       }   

}

output {

    if [type] == "system"{
        elasticsearch {
           hosts => ["192.168.1.160:9200"]
           index => "system-%{+YYYY.MM.dd}"
        }
    }

    if [type] == "es-error"{
        elasticsearch {
           hosts => ["192.168.1.160:9200"]
           index => "es-error-%{+YYYY.MM.dd}"
        }
    }
    if [type] == "nginx-log"{
        elasticsearch {
           hosts => ["192.168.1.160:9200"]
           index => "nignx-log-%{+YYYY.MM.dd}"
        }
    }
    if [type] == "system-syslog"{
        elasticsearch {
           hosts => ["192.168.1.160:9200"]
           index => "system-syslog-%{+YYYY.MM.dd}"
        }
    }
}

执行:

[root@elk-node2 ~]# /opt/logstash/bin/logstash -f file.conf --configtest
Configuration OK
[root@elk-node2 ~]# /opt/logstash/bin/logstash -f file.conf &

去redis中检查,发现数据已经被读出到elasticsearch中了。

192.168.1.160:6379[6]> keys *
(empty list or set)

同时登陆logstash和kibana看,发现可以正常收集到日志了。

可以执行这个 去查看nginx日志

[root@elk-node1 ~]# ab -n10000 -c1 http://192.168.1.160/

也可以启动多个redis写到ES中,具体根据自己的实际情况而定。

以上即是本人部署ELK环境的整个操作记录,在此留笔,希望能帮助到一些朋友。