ELK日志分析系统
Posted 秋天与老树
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ELK日志分析系统
一.基础环境配置:
1.ip
192.168.200.10 elasticsearch+kibana ELK-1
192.168.200.20 elasticsearch+logstash ELK-2
192.168.200.30 elasticsearch ELK-3
[root@localhost ~]# hostnamectl set-hostname elk-1
[root@localhost ~]# hostnamectl set-hostname elk-2
[root@localhost ~]# hostnamectl set-hostname elk-3
2.配置hosts[三台]
[root@elk-1 ~]# vi /etc/hosts
[root@elk-1 ~]# cat /etc/hosts
127.0.0.1 localhost localhost.localdomain localhost4 localhost4.localdomain4
::1 localhost localhost.localdomain localhost6 localhost6.localdomain6
192.168.200.10 elk-1
192.168.200.20 elk-2
192.168.200.30 elk-3
3.安装jdk[三台]
[root@elk-1 ~]# yum install -y java-1.8.0-openjdk java-1.8.0-openjdk-devel
……
[root@elk-1 ~]# java -version
openjdk version "1.8.0_242"
OpenJDK Runtime Environment (build 1.8.0_242-b08)
OpenJDK 64-Bit Server VM (build 25.242-b08, mixed mode)
二.elasticserach安装
(1)安装es
[root@elk-1 ~]# rpm -ivh elasticsearch-6.0.0.rpm
[root@elk-2 ~]# rpm -ivh elasticsearch-6.0.0.rpm
[root@elk-3 ~]# rpm -ivh elasticsearch-6.0.0.rpm
#i表示安装,v表示显示安装过程,h表示显示进度
(2)配置es
配置elasticsearch的配置文件,配置文件在/etc/elasticsearch/elasticsearch.yml
Elk-1节点:增加以下 //字样
root@elk-1 ~]# vi /etc/elasticsearch/elasticsearch.yml
[root@elk-1 ~]# cat /etc/elasticsearch/elasticsearch.yml
```handlebars
# ======= Elasticsearch Configuration ===========
#
# NOTE: Elasticsearch comes with reasonable defaults for most settings.
# Before you set out to tweak and tune the configuration, make sure you
# understand what are you trying to accomplish and the consequences.
#
# The primary way of configuring a node is via this file. This template lists
# the most important settings you may want to configure for a production cluster.
#
# Please consult the documentation for further information on configuration options:
# https://www.elastic.co/guide/en/elasticsearch/reference/index.html
#
# ------------------Cluster --------------------
# Use a descriptive name for your cluster:
cluster.name: ELK //在这里插入代码片配置es的集群名称,默认是elasticsearch,es会自动发现在同一网段下的es,如果在同一网段下有多个集群,就可以用这个属性来区分不同的集群。
# ------------------------Node -----------------
# Use a descriptive name for the node:
node.name: elk-1 //节点名,默认随机指定一个name列表中名字,该列表在es的jar包中config文件夹里name.txt文件中,其中有很多作者添加的有趣名字。
node.master: true //指定该节点是否有资格被选举成为node,默认是true,es是默认集群中的第一台机器为master,如果这台机挂了就会重新选举master。 其他两节点为false
node.data: false //指定该节点是否存储索引数据,默认为true。其他两节点为true
# ----------------- Paths ----------------
# Path to directory where to store the data (separate multiple locations by comma):
path.data: /var/lib/elasticsearch //索引数据存储位置(保持默认,不要开启注释)
# Path to log files:
path.logs: /var/log/elasticsearch //设置日志文件的存储路径,默认是es根目录下的logs文件夹
# --------------- Network ------------------
# Set the bind address to a specific IP (IPv4 or IPv6):
network.host: 192.168.200.10 //设置绑定的ip地址,可以是ipv4或ipv6的,默认为0.0.0.0。
# Set a custom port for HTTP:
http.port: 9200 //启动的es对外访问的http端口,默认9200
# For more information, consult the network module documentation.
# --------------------Discovery ----------------
# Pass an initial list of hosts to perform discovery when new node is started:
# The default list of hosts is ["127.0.0.1", "[::1]"]
#discovery.zen.ping.unicast.hosts: ["host1", "host2"]
discovery.zen.ping.unicast.hosts: ["elk-1","elk-2","elk-3"] //设置集群中master节点的初始列表,可以通过这些节点来自动发现新加入集群的节点。
Elk-2节点:
[root@elk-2 ~]# vi /etc/elasticsearch/elasticsearch.yml
[root@elk-2 ~]# cat /etc/elasticsearch/elasticsearch.yml |grep -v ^# |grep -v ^$
cluster.name: ELK
node.name: elk-2
node.master: false
node.data: true
path.data: /var/lib/elasticsearch
path.logs: /var/log/elasticsearch
network.host: 192.168.200.20
http.port: 9200
discovery.zen.ping.unicast.hosts: ["elk-1","elk-2","elk-3"]
Elk-3节点:
[root@elk-2 ~]# vi /etc/elasticsearch/elasticsearch.yml
[root@elk-2 ~]# cat /etc/elasticsearch/elasticsearch.yml |grep -v ^# |grep -v ^$
cluster.name: ELK
node.name: elk-3
node.master: false
node.data: true
path.data: /var/lib/elasticsearch
path.logs: /var/log/elasticsearch
network.host: 192.168.200.30
http.port: 9200
discovery.zen.ping.unicast.hosts: ["elk-1","elk-2","elk-3"]
(3)启动服务
通过命令启动es服务,启动后使用netstat命令查看是否端口启动
[root@elk-1 ~]# systemctl start elasticsearch
[root@elk-2 ~]# systemctl start elasticsearch
[root@elk-3 ~]# systemctl start elasticsearch
[root@elk-1 ~]# netstat -lntp
Active Internet connections (only servers)
Proto Recv-Q Send-Q Local Address Foreign Address State PID/Program name
tcp 0 0 0.0.0.0:22 0.0.0.0:* LISTEN 1446/sshd
tcp 0 0 127.0.0.1:25 0.0.0.0:* LISTEN 1994/master
tcp6 0 0 192.168.200.10:9200 :::* LISTEN 19280/java
tcp6 0 0 192.168.200.10:9300 :::* LISTEN 19280/java
(4)检测集群状态
通过curl ‘IP:9200/_cluster/health?pretty’ 来检查集群状态,命令如下
Elk-1节点:
[root@elk-1 ~]# curl '192.168.200.10:9200/_cluster/health?pretty'
{
"cluster_name" : "ELK",
"status" : "green", //为green则代表健康没问题,yellow或者red 则是集群有问题
"timed_out" : false, //是否有超时
"number_of_nodes" : 3, //集群中的节点数量
"number_of_data_nodes" : 2, //集群中data节点的数量
"active_primary_shards" : 1,
"active_shards" : 2,
"relocating_shards" : 0,
"initializing_shards" : 0,
"unassigned_shards" : 0,
"delayed_unassigned_shards" : 0,
"number_of_pending_tasks" : 0,
"number_of_in_flight_fetch" : 0,
"task_max_waiting_in_queue_millis" : 0,
"active_shards_percent_as_number" : 100.0
}
三.部署kibana
(1)安装kibana
[root@elk-1 ~]# rpm -ivh kibana-6.0.0-x86_64.rpm
(2)配置kibana
[root@elk-1 ~]# vi /etc/kibana/kibana.yml
[root@elk-1 ~]# cat /etc/kibana/kibana.yml |grep -v ^#
server.port: 5601
server.host: 192.168.200.10
elasticsearch.url: "http://192.168.200.10:9200"
(3)启动kibana
[root@elk-1 ~]# systemctl start kibana
查看端口
[root@elk-1 ~]# netstat -lntp |grep node
tcp 0 0 192.168.200.10:5601 0.0.0.0:* LISTEN 19958/node
启动成功后网页访问(192.168.200.10:5601),可以访问到如下界面
四.Logstash部署:
(1)安装logstash
[root@elk-2 ~]# rpm -ivh logstash-6.0.0.0.rpm
(2)配置logstash
配置/etc/logstash/logstash.yml,修改增加如下:
[root@elk-2 ~]# vi /etc/logstash/logstash.yml
http.host: "192.168.200.20"
配置logstash收集syslog日志
[root@elk-2 ~]# vi /etc/logstash/conf.d/syslog.conf
[root@elk-2 ~]# cat /etc/logstash/conf.d/syslog.conf
input { #定义日志源
file {
path => "/var/log/messages" #定义日志来源路径 目录要给644权限,不然无法读取日志
type => "systemlog" #定义类型
start_position => "beginning"
stat_interval => "3"
}
}
output { #定义日志输出
if [type] == "systemlog" {
elasticsearch {
hosts => ["192.168.200.10:9200"]
index => "system-log-%{+YYYY.MM.dd}"
}
}
}
赋权 /var/log/messages
[root@elk-2 ~]# chomd 644 /var/log/messages
#创建软连接,方便使用logstash命令
[root@elk-2 ~]# ln -s /usr/share/logstash/bin/logstash /usr/bin`
#检测配置文件是否错误:
[root@elk-2 ~]# logstash --path.settings /etc/logstash/ -f /etc/logstash/conf.d/syslog.conf --config.test_and_exit
Sending Logstash's logs to /var/log/logstash which is now configured via log4j2.properties
Configuration OK #为ok则代表没问题
//--path.settings 用于指定logstash的配置文件所在的目录
//-f 指定需要被检测的配置文件的路径
//--config.test_and_exit 指定检测完之后就退出,不然就会直接启动了
(3)启动logstash
检查配置文件没有问题后启动logstash服务,
[root@elk-2 ~]# vi /etc/rsyslog.conf
在#### RULES ####增加一行
*.* @@192.168.200.20:10514
[root@elk-2 ~]# systemctl start logstash
查看端口netstat -lntp
[root@elk-2 ~]# netstat -lntp
Active Internet connections (only servers)
Proto Recv-Q Send-Q Local Address Foreign Address State PID/Program name
tcp 0 0 0.0.0.0:22 0.0.0.0:* LISTEN 1443/sshd
tcp 0 0 127.0.0.1:25 0.0.0.0:* LISTEN 2009/master
tcp6 0 0 192.168.200.20:9200 :::* LISTEN 19365/java
tcp6 0 0 :::10514 :::* LISTEN 21835/java
tcp6 0 0 192.168.200.20:9300 :::* LISTEN 19365/java
tcp6 0 0 :::22 :::* LISTEN 1443/sshd
tcp6 0 0 ::1:25 :::* LISTEN 2009/master
tcp6 0 0 192.168.200.20:9600 :::* LISTEN 21835/java
启动服务后,有进程但是没有端口的问题解决:
[root@elk-2 ~]# cat /var/log/logstash/logstash-plain.log
//权限问题,因为之前我们以root的身份在终端启动过logstash,所以产生的相关文件的属组属主都是root
[root@elk-2 ~]# ll /var/lib/logstash/
total 4
drwxr-xr-x. 2 root root 6 Dec 6 15:45 dead_letter_queue
drwxr-xr-x. 2 root root 6 Dec 6 15:45 queue
-rw-r--r--. 1 root root 36 Dec 6 15:45 uuid
[root@elk-2 ~]# chown -R logstash /var/lib/logstash/
[root@elk-2 ~]# systemctl restart logstash #重启服务后即可
启动完毕后,让syslog产生日志,用第三台主机登录elk-2机器,登录后退出。
6.完善
(1)kibana上查看日志
之前部署kibana完成后,还没有检索日志。现在logstash部署完成,我们回到kibana服务器上查看日志索引,执行命令如下:
root@elk-1 ~]# curl '192.168.200.10:9200/_cat/indices?v'
health status index uuid pri rep docs.count docs.deleted store.size pri.store.size
green open system-log-2019.12.06 UeKk3IY6TiebNu_OD04YZA 5 1 938 0 816kb 412.2kb
green open .kibana KL7WlNw_T7K36_HSbchBcw 1 1 1 0 7.3kb 3.6kb
[root@elk-1 ~]# curl -XGET/DELETE '192.168.200.10:9200/system-log-2021.10.31?pretty'
{
"system-log-20" : {
"aliases" : { },
"mappings" : {
"systemlog" : {
"properties" : {
"@timestamp" : {
"type" : "date"
},
"@version" : {
"type" : "text",
"fields" : {
"keyword" : {
"type" : "keyword",
"ignore_above" : 256
}
}
},
"host" : {
"type" : "text",
"fields" : {
"keyword" : {
"type" : "keyword",
"ignore_above" : 256
}
}
},
(2)web界面配置
浏览器访问192.168.200.10:5601,到kibana上配置 索引:
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