Monitoring networks with Prometheus tefan afr CDN Engineer - - PowerPoint PPT Presentation

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Monitoring networks with Prometheus tefan afr CDN Engineer - - PowerPoint PPT Presentation

Sep 07, 2023 9 likes •149 views

Monitoring networks with Prometheus tefan afr CDN Engineer @som_zlo @ShowmaxDevs https://tech.showmax.com Who am I? Im tefan afr CDN Engineer @ Showmax We deliver tens of Gbit/s Prometheus user since

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https://tech.showmax.com @ShowmaxDevs

Monitoring networks with Prometheus

Štefan Šafár CDN Engineer @som_zlo

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https://tech.showmax.com @ShowmaxDevs

Who am I?

  • I’m Štefan Šafár
  • CDN Engineer @ Showmax
  • We deliver tens of Gbit/s
  • Prometheus user since 2015
  • Used to do security, networks and

cloud infrastructure

  • Usually based in Prague
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https://tech.showmax.com @ShowmaxDevs

Contents

  • What is Prometheus
  • Why we use it
  • Query examples & dashboards
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https://tech.showmax.com @ShowmaxDevs

What is Prometheus

  • Time-series database
  • Stores floating-point values every X seconds
  • Raw data - no aggregation
  • Powerful query language
  • Can sum/average/add/multiply any data
  • Labels allow you to slice the data
  • Exporters for different services (i.e. SNMP)
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Why Prometheus

  • Cloud-native monitoring
  • Integrates very well with the rest of our stack
  • Ops use it already - one system to rule them all
  • It allows you to do more stuff more easily
  • Everything else* sucks

* that I know of

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PromQL Examples

  • arista_port_outOctets{description=~".*NAP.*"}
  • rate(arista_port_outOctets{description=~".*NAP.*"}[3m])
  • rate(arista_port_outOctets{description=~".*NAP.*"}[3m])*8
  • sum(rate(arista_port_outOctets{description=~".*NAP.*"}[3m]

)*8)

  • arista_port_outOctets{mtu!="1500"}
  • (arista_tcam_used / arista_tcam_total)*100
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PromQL Examples

  • sum(rate(arista_port_outOctets{description=~".*NAP.*"}[3m]

))*8 - sum(rate(arista_port_outOctets{description=~".*NAP.*"}[3m]

  • ffset 1d))*8
  • arista_sfp_alarms
  • arista_sfp_alarms AND ON (device, instance) arista_admin_up

== 0

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PromQL Examples

  • quantile_over_time(0.99,rate(ifHCOutOctets{ifAlias="600_P2P
  • CRESTA-OFFICE"}[3m])[1h:])*8
  • quantile_over_time(0.95,rate(ifHCOutOctets{ifAlias=~".*OPTI

NET.*"}[3m])[1w:])*8

  • quantile_over_time(0.95,sum by

(instance)(rate(ifHCOutOctets{ifAlias=~".*OPTINET.*"}[3m])) [1w:])*8

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PromQL Examples

  • (arista_tcam_used / arista_tcam_total)*100
  • irate(arista_port_inOctets[5m]) /

irate(arista_port_inUcastPkts[5m]) < 2000

  • arista_admin_up != arista_l2_up
  • arista_sfp_stats{sensor="rxPower"}
  • arista_sfp_stats{sensor="rxPower"} AND on(device, instance)

(arista_admin_up == 1)

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Grafana dashboards

  • https://grafana.showmax.cc/d/vvJSOdkWk/sfp-inventory?or

gId=1

  • https://grafana.showmax.cc/d/OZmQd16ik/bgp-status?orgId

=1

  • https://grafana.showmax.cc/d/kduYH-DWz/sfp-receive-pow

er?orgId=1

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Summary

  • SNMP sucks
  • Prometheus is awesome
  • Grafana is awesome
  • You are awesome
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THANK YOU!

Get in touch! Štefan Šafár som_zlo

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Additional links

  • Data source for most of the queries used in Examples:

https://github.com/Showmax/arista-eos-exporter

  • Blogpost about Prometheus

https://tech.showmax.com/2019/10/prometheus-introducti

  • n/