Don't let your log go away

Talk given at Paris Tech Talk MeetUp

Transcript

1. DON’T LET YOUR
   LOG GO AWAY
   @odolbeau
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2. WHO AM I?
   Olivier Dolbeau
   @odolbeau
   Work at BlaBlaCar
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3. Log
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4. Which logs
   are we

   talking about?
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5. access logs
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6. syslog
   syslog
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7. application logs
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8. Access
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9. SSH
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10. Analyze
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11. tail
    grep
    cat
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12. This is specific to its access logs
    My roommate uses this to colorise his access logs…
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18. Inputs Filters Outputs
    41 inputs
    • syslog
    • udp
    • varnishlog
    • gelf
    • …
    50 filters
    • date
    • geoip
    • i18n
    • urldecode
    • …
    55 outputs
    • elasticsearch
    • redis
    • email
    • graphite
    • …
    And there are also some codecs
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19. Kibana
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21. ELK
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23. syslog
    syslog
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25. *.* @127.0.0.1:514;RSYSLOG_ForwardFormat
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26. input {
    udp {
    port => 514
    type => syslog
    }
    }
    Logstash - Input
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27. filter {
    if [type] == "syslog" {
    grok {
    match => [ "message", "<%{POSINT:syslog_pri}>%
    {TIMESTAMP_ISO8601:syslog_timestamp} %{SYSLOGHOST:syslog_hostname} %
    {DATA:syslog_program}(?:\[%{POSINT:syslog_pid}\])?: %
    {GREEDYDATA:syslog_message}" ]
    add_field => [ "received_at", "%{@timestamp}" ]
    add_field => [ "received_from", "%{host}" ]
    add_tag => [ "rsyslog" ]
    }
    }
    }
    Logstash - Filter
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28. output {
    elasticsearch_http {
    host => “my_es.blablacar.com”
    port => 9200
    index => "logstashv1-%{+YYYY.MM.dd}"
    manage_template => false
    }
    }
    Logstash - Output
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30. syslog
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