Defined Type: monitoring::alerts::http_availability

Defined in:
modules/monitoring/manifests/alerts/http_availability.pp

Overview

Global frontend HTTP availability

Parameters:

  • warning (Any) (defaults to: 99.5)
  • critical (Any) (defaults to: 99.0) 


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# File 'modules/monitoring/manifests/alerts/http_availability.pp', line 2

define monitoring::alerts::http_availability(
  $warning  = 99.5,
  $critical = 99.0,
  ) {
    # Varnish HTTP availability as seen by looking at status codes
    monitoring::check_prometheus { "varnish_${title}":
        description     => 'Varnish has reduced HTTP availability',
        query           => '100 * (1 - global_job:varnish_requests:avail2m)',
        prometheus_url  => 'http://prometheus.svc.eqiad.wmnet/global',
        method          => 'le',
        retries         => 2,
        warning         => $warning,
        critical        => $critical,
        nagios_critical => true,
        dashboard_links => ['https://grafana.wikimedia.org/d/000000479/frontend-traffic?orgId=1&refresh=1m&viewPanel=3',
                            'https://logstash.wikimedia.org/goto/fe494e83d04fee66c8f0958bfc28451f'],
        notes_link      => 'https://wikitech.wikimedia.org/wiki/Varnish#Diagnosing_Varnish_alerts',
    }

    # ATS (on Varnish hosts) HTTP availability as seen by looking at status codes
    monitoring::check_prometheus { "ats_${title}":
        description     => 'ATS TLS has reduced HTTP availability',
        query           => '100 * (1 - global_job:trafficserver_requests:avail2m{layer="tls"})',
        prometheus_url  => 'http://prometheus.svc.eqiad.wmnet/global',
        method          => 'le',
        retries         => 2,
        warning         => $warning,
        critical        => $critical,
        nagios_critical => true,
        dashboard_links => ['https://grafana.wikimedia.org/d/000000479/frontend-traffic?orgId=1&refresh=1m&viewPanel=13'],
        notes_link      => 'https://wikitech.wikimedia.org/wiki/Cache_TLS_termination',
    }
}