前篇：
ELK6.2.2日志分析监控系统搭建和配置
ELK实战篇
好，现在索引也可以创建了，现在可以来输出nginx、apache、message、secrue的日志到前台展示（Nginx有的话直接修改，没有自行安装）
编辑nginx配置文件，修改以下内容（在http模块下添加）
log_format json '{"@timestamp":"$time_iso8601",'
'"@version":"1",'
'"client":"$remote_addr",'
'"url":"$uri",'
'"status":"$status",'
'"domian":"$host",'
'"host":"$server_addr",'
'"size":"$body_bytes_sent",'
'"responsetime":"$request_time",'
'"referer":"$http_referer",'
'"ua":"$http_user_agent"'
'}';
修改access_log的输出格式为刚才定义的json
access_log logs/elk.access.log json;
继续修改apache的配置文件
LogFormat "{ \
\"@timestamp\": \"%{%Y-%m-%dT%H:%M:%S%z}t\", \
\"@version\": \"1\", \
\"tags\":[\"apache\"], \
\"message\": \"%h %l %u %t \\\"%r\\\" %>s %b\", \
\"clientip\": \"%a\", \
\"duration\": %D, \
\"status\": %>s, \
\"request\": \"%U%q\", \
\"urlpath\": \"%U\", \
\"urlquery\": \"%q\", \
\"bytes\": %B, \
\"method\": \"%m\", \
\"site\": \"%{Host}i\", \
\"referer\": \"%{Referer}i\", \
\"useragent\": \"%{User-agent}i\" \
}" ls_apache_json
一样修改输出格式为上面定义的json格式
CustomLog logs/access_log ls_apache_json
编辑logstash配置文件，进行日志收集
vim /etc/logstash/conf.d/full.conf
input {
file {
path => "/var/log/messages"
type => "system"
start_position => "beginning"
}
file {
path => "/var/log/secure"
type => "secure"
start_position => "beginning"
}
file {
path => "/var/log/httpd/access_log"
type => "http"
start_position => "beginning"
}
file {
path => "/usr/local/nginx/logs/elk.access.log"
type => "nginx"
start_position => "beginning"
}
}
output {
if [type] == "system" {
elasticsearch {
hosts => ["192.168.1.202:9200"]
index => "nagios-system-%{+YYYY.MM.dd}"
}
}
if [type] == "secure" {
elasticsearch {
hosts => ["192.168.1.202:9200"]
index => "nagios-secure-%{+YYYY.MM.dd}"
}
}
if [type] == "http" {
elasticsearch {
hosts => ["192.168.1.202:9200"]
index => "nagios-http-%{+YYYY.MM.dd}"
}
}
if [type] == "nginx" {
elasticsearch {
hosts => ["192.168.1.202:9200"]
index => "nagios-nginx-%{+YYYY.MM.dd}"
}
}
}
运行看看效果如何
logstash -f /etc/logstash/conf.d/full.conf
可以发现所有创建日志的索引都已存在，接下来就去Kibana创建日志索引，进行展示（按照上面的方法进行创建索引即可），看下展示的效果
接下来再来一发MySQL慢日志的展示
由于MySQL的慢日志查询格式比较特殊，所以需要用正则进行匹配，并使用multiline能够进行多行匹配（看具体配置）
input {
file {
path => "/var/log/messages"
type => "system"
start_position => "beginning"
}
file {
path => "/var/log/secure"
type => "secure"
start_position => "beginning"
}
file {
path => "/var/log/httpd/access_log"
type => "http"
start_position => "beginning"
}
file {
path => "/usr/local/nginx/logs/elk.access.log"
type => "nginx"
start_position => "beginning"
}
file {
path => "/var/log/mysql/mysql.slow.log"
type => "mysql"
start_position => "beginning"
codec => multiline {
pattern => "^# User@Host:"
negate => true
what => "previous"
}
}
}
filter {
grok {
match => { "message" => "SELECT SLEEP" }
add_tag => [ "sleep_drop" ]
tag_on_failure => []
}
if "sleep_drop" in [tags] {
drop {}
}
grok {
match => { "message" => "(?m)^# User@Host: %{USER:User}\[[^\]]+\] @ (?:(?<clienthost>\S*) )?\[(?:%{IP:Client_IP})?\]\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*(?<Query>(?<Action>\w+)\s+.*)\n# Time:.*$" }
}
date {
match => [ "timestamp", "UNIX" ]
remove_field => [ "timestamp" ]
}
}
output {
if [type] == "system" {
elasticsearch {
hosts => ["192.168.1.202:9200"]
index => "nagios-system-%{+YYYY.MM.dd}"
}
}
if [type] == "secure" {
elasticsearch {
hosts => ["192.168.1.202:9200"]
index => "nagios-secure-%{+YYYY.MM.dd}"
}
}
if [type] == "http" {
elasticsearch {
hosts => ["192.168.1.202:9200"]
index => "nagios-http-%{+YYYY.MM.dd}"
}
}
if [type] == "nginx" {
elasticsearch {
hosts => ["192.168.1.202:9200"]
index => "nagios-nginx-%{+YYYY.MM.dd}"
}
}
if [type] == "mysql" {
elasticsearch {
hosts => ["192.168.1.202:9200"]
index => "nagios-mysql-slow-%{+YYYY.MM.dd}"
}
}
}查看效果(一条慢日志查询会显示一条，如果不进行正则匹配，那么一行就会显示一条)
具体的日志输出需求，进行具体的分析
三：ELK终极篇
安装reids
# yum install -y redis
修改redis的配置文件
# vim /etc/redis.conf
修改内容如下
daemonize yes
bind 192.168.1.202
启动redis服务
# /etc/init.d/redis restart
测试redis的是否启用成功
# redis-cli -h 192.168.1.202
输入info如果有不报错即可
redis 192.168.1.202:6379> info
redis_version:2.4.10
....
编辑配置redis-out.conf配置文件，把标准输入的数据存储到redis中
# vim /etc/logstash/conf.d/redis-out.conf
添加如下内容
input {
stdin {}
}
output {
redis {
host => "192.168.1.202"
port => "6379"
password => 'test'
db => '1'
data_type => "list"
key => 'elk-test'
}
}
运行logstash指定redis-out.conf的配置文件
# /usr/share/logstash/bin/logstash -f /etc/logstash/conf.d/redis-out.conf运行成功以后，在logstash中输入内容（查看下效果）
编辑配置redis-in.conf配置文件，把reids的存储的数据输出到elasticsearch中
# vim /etc/logstash/conf.d/redis-out.conf
添加如下内容
input{
redis {
host => "192.168.1.202"
port => "6379"
password => 'test'
db => '1'
data_type => "list"
key => 'elk-test'
batch_count => 1 #这个值是指从队列中读取数据时，一次性取出多少条，默认125条（如果redis中没有125条，就会报错，所以在测试期间加上这个值）
}
}
output {
elasticsearch {
hosts => ['192.168.1.202:9200']
index => 'redis-test-%{+YYYY.MM.dd}'
}
}
运行logstash指定redis-in.conf的配置文件
# /usr/share/logstash/bin/logstash -f /etc/logstash/conf.d/redis-out.conf
把之前的配置文件修改一下，变成所有的日志监控的来源文件都存放到redis中，然后通过redis在输出到elasticsearch中
更改为如下，编辑full.conf
input {
file {
path => "/var/log/httpd/access_log"
type => "http"
start_position => "beginning"
}
file {
path => "/usr/local/nginx/logs/elk.access.log"
type => "nginx"
start_position => "beginning"
}
file {
path => "/var/log/secure"
type => "secure"
start_position => "beginning"
}
file {
path => "/var/log/messages"
type => "system"
start_position => "beginning"
}
}
output {
if [type] == "http" {
redis {
host => "192.168.1.202"
password => 'test'
port => "6379"
db => "6"
data_type => "list"
key => 'nagios_http'
}
}
if [type] == "nginx" {
redis {
host => "192.168.1.202"
password => 'test'
port => "6379"
db => "6"
data_type => "list"
key => 'nagios_nginx'
}
}
if [type] == "secure" {
redis {
host => "192.168.1.202"
password => 'test'
port => "6379"
db => "6"
data_type => "list"
key => 'nagios_secure'
}
}
if [type] == "system" {
redis {
host => "192.168.1.202"
password => 'test'
port => "6379"
db => "6"
data_type => "list"
key => 'nagios_system'
}
}
}
运行logstash指定shipper.conf的配置文件
# /usr/share/logstash/bin/logstash -f /etc/logstash/conf.d/full.conf
在redis中查看是否已经将数据写到里面(有时候输入的日志文件不产生日志，会导致redis里面也没有写入日志)
把redis中的数据读取出来，写入到elasticsearch中(需要另外一台主机做实验)
编辑配置文件
# vim /etc/logstash/conf.d/redis-out.conf
添加如下内容
input {
redis {
type => "system"
host => "192.168.1.202"
password => 'test'
port => "6379"
db => "6"
data_type => "list"
key => 'nagios_system'
batch_count => 1
}
redis {
type => "http"
host => "192.168.1.202"
password => 'test'
port => "6379"
db => "6"
data_type => "list"
key => 'nagios_http'
batch_count => 1
}
redis {
type => "nginx"
host => "192.168.1.202"
password => 'test'
port => "6379"
db => "6"
data_type => "list"
key => 'nagios_nginx'
batch_count => 1
}
redis {
type => "secure"
host => "192.168.1.202"
password => 'test'
port => "6379"
db => "6"
data_type => "list"
key => 'nagios_secure'
batch_count => 1
}
}
output {
if [type] == "system" {
elasticsearch {
hosts => ["192.168.1.202:9200"]
index => "nagios-system-%{+YYYY.MM.dd}"
}
}
if [type] == "http" {
elasticsearch {
hosts => ["192.168.1.202:9200"]
index => "nagios-http-%{+YYYY.MM.dd}"
}
}
if [type] == "nginx" {
elasticsearch {
hosts => ["192.168.1.202:9200"]
index => "nagios-nginx-%{+YYYY.MM.dd}"
}
}
if [type] == "secure" {
elasticsearch {
hosts => ["192.168.1.202:9200"]
index => "nagios-secure-%{+YYYY.MM.dd}"
}
}
}
注意:
input是从客户端收集的
output是同样也保存到192.168.1.202中的elasticsearch中，如果要保存到当前的主机上，可以把output中的hosts修改成localhost，如果还需要在kibana中显示，需要在本机上部署kabana，为何要这样做，起到一个松耦合的目的
说白了，就是在客户端收集日志，写到服务端的redis里或是本地的redis里面，输出的时候对接ES服务器即可
运行命令看看效果
# /usr/share/logstash/bin/logstash -f /etc/logstash/conf.d/redis-out.conf效果是和直接往ES服务器输出一样的（这样是先将日志存到redis数据库，然后再从redis数据库里取出日志）
上线ELK
１. 日志分类
系统日志 rsyslog logstash syslog插件
访问日志 nginx logstash codec json
错误日志 file logstash mulitline
运行日志 file logstash codec json
设备日志 syslog logstash syslog插件
Debug日志 file logstash json 或者 mulitline
2. 日志标准化
路径 固定
格式 尽量json
3. 系统个日志开始-->错误日志-->运行日志-->访问日志因为ES保存日志是永久保存，所以需要定期删除一下日志，下面命令为删除指定时间前的日志
curl -X DELETE http://xx.xx.com:9200/logstash-*-`date +%Y-%m-%d -d "-$n days"`
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