logstash通过redis收集日志

（1）部署redis

1丶安装redis

yum install epel-release -y
yum install redis -y

2丶修改配置文件

#vim /etc/redis.conf
bind 0.0.0.0
daemonize yes
save ""
requirepass 123456

3.启动redis

systemctl enable redis
systemctl restart redis

（2）配置logstash将日志写入到redis中

1丶修改配置文件

input {
        file {
                path => "/var/log/messages"
                type => "systemlog"
                start_position => "beginning"
                stat_interval => "2"
        }
}

output {
        if [type] == "systemlog" {
                redis {
                        data_type => "list"
                        host => "192.168.1.31"
                        db => "6"
                        port => "6379"
                        password => "123456"
                        key => "systemlog"
                }
        }
}

2丶启动

logstash -f /etc/logstash/conf.d/redis.conf  -t
logstash -f /etc/logstash/conf.d/redis.conf

3丶写入日志到messages日志中

cat /etc/hosts  >>/var/log/messages

4丶登录redis查看

# redis-cli -h 192.168.1.31
192.168.1.31:6379> auth 123456
OK
192.168.1.31:6379> select 6
OK
192.168.1.31:6379[6]> keys *
1) "systemlog"
192.168.1.31:6379[6]> llen systemlog
(integer) 11292
192.168.1.31:6379[6]> lpop systemlog

（3）配置logstash从redis中取出数据到elasticsearch

1丶修改配置文件

input {
        redis {
                type => "systemlog"
                host => "192.168.1.31"
                password => '123456'
                port => "6379"
                db => "6"
                data_type => "list"
                key => "systemlog"
                }
}
output {
        if [type] == "systemlog" {
                elasticsearch {
                        hosts => ["192.168.1.31:9200"]
                        index => "redis-systemlog-%{+YYYY.MM.dd}"
                                }
                        }
        }

2丶启动

logstash -f /etc/logstash/conf.d/redis.conf  -t
logstash -f /etc/logstash/conf.d/redis.conf

3丶启动head插件查看索引