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# unmatched lines
# the following alarms trigger only when there are enough data.
# we assume there are enough data when:
#
# $1m_total_requests > 120
#
# i.e. when there are at least 120 requests during the last minute
template: web_log_1m_total_requests
on: web_log.requests
class: Workload
type: Web Server
component: Web log
lookup: sum -1m unaligned
calc: ($this == 0)?(1):($this)
units: requests
every: 10s
info: number of HTTP requests in the last minute
template: web_log_1m_unmatched
on: web_log.excluded_requests
class: Errors
type: Web Server
component: Web log
lookup: sum -1m unaligned of unmatched
calc: $this * 100 / $web_log_1m_total_requests
units: %
every: 10s
warn: ($web_log_1m_total_requests > 120) ? ($this > 1) : ( 0 )
delay: up 1m down 5m multiplier 1.5 max 1h
info: percentage of unparsed log lines over the last minute
to: webmaster
# -----------------------------------------------------------------------------
# high level response code alarms
# the following alarms trigger only when there are enough data.
# we assume there are enough data when:
#
# $1m_requests > 120
#
# i.e. when there are at least 120 requests during the last minute
template: web_log_1m_requests
on: web_log.type_requests
class: Workload
type: Web Server
component: Web log
lookup: sum -1m unaligned
calc: ($this == 0)?(1):($this)
units: requests
every: 10s
info: number of HTTP requests in the last minute
template: web_log_1m_successful
on: web_log.type_requests
class: Workload
type: Web Server
component: Web log
lookup: sum -1m unaligned of success
calc: $this * 100 / $web_log_1m_requests
units: %
every: 10s
warn: ($web_log_1m_requests > 120) ? ($this < (($status >= $WARNING ) ? ( 95 ) : ( 85 )) ) : ( 0 )
crit: ($web_log_1m_requests > 120) ? ($this < (($status == $CRITICAL) ? ( 85 ) : ( 75 )) ) : ( 0 )
delay: up 2m down 15m multiplier 1.5 max 1h
info: ratio of successful HTTP requests over the last minute (1xx, 2xx, 304, 401)
to: webmaster
template: web_log_1m_redirects
on: web_log.type_requests
class: Workload
type: Web Server
component: Web log
lookup: sum -1m unaligned of redirect
calc: $this * 100 / $web_log_1m_requests
units: %
every: 10s
warn: ($web_log_1m_requests > 120) ? ($this > (($status >= $WARNING ) ? ( 1 ) : ( 20 )) ) : ( 0 )
delay: up 2m down 15m multiplier 1.5 max 1h
info: ratio of redirection HTTP requests over the last minute (3xx except 304)
to: webmaster
template: web_log_1m_bad_requests
on: web_log.type_requests
class: Errors
type: Web Server
component: Web log
lookup: sum -1m unaligned of bad
calc: $this * 100 / $web_log_1m_requests
units: %
every: 10s
warn: ($web_log_1m_requests > 120) ? ($this > (($status >= $WARNING) ? ( 10 ) : ( 30 )) ) : ( 0 )
delay: up 2m down 15m multiplier 1.5 max 1h
info: ratio of client error HTTP requests over the last minute (4xx except 401)
to: webmaster
template: web_log_1m_internal_errors
on: web_log.type_requests
class: Errors
type: Web Server
component: Web log
lookup: sum -1m unaligned of error
calc: $this * 100 / $web_log_1m_requests
units: %
every: 10s
warn: ($web_log_1m_requests > 120) ? ($this > (($status >= $WARNING) ? ( 1 ) : ( 2 )) ) : ( 0 )
crit: ($web_log_1m_requests > 120) ? ($this > (($status == $CRITICAL) ? ( 2 ) : ( 5 )) ) : ( 0 )
delay: up 2m down 15m multiplier 1.5 max 1h
info: ratio of server error HTTP requests over the last minute (5xx)
to: webmaster
# -----------------------------------------------------------------------------
# web slow
# the following alarms trigger only when there are enough data.
# we assume there are enough data when:
#
# $1m_requests > 120
#
# i.e. when there are at least 120 requests during the last minute
template: web_log_10m_response_time
on: web_log.request_processing_time
class: Latency
type: System
component: Web log
lookup: average -10m unaligned of avg
units: ms
every: 30s
info: average HTTP response time over the last 10 minutes
template: web_log_web_slow
on: web_log.request_processing_time
class: Latency
type: Web Server
component: Web log
lookup: average -1m unaligned of avg
units: ms
every: 10s
green: 500
red: 1000
warn: ($web_log_1m_requests > 120) ? ($this > $green && $this > ($web_log_10m_response_time * 2) ) : ( 0 )
crit: ($web_log_1m_requests > 120) ? ($this > $red && $this > ($web_log_10m_response_time * 4) ) : ( 0 )
delay: down 15m multiplier 1.5 max 1h
info: average HTTP response time over the last 1 minute
options: no-clear-notification
to: webmaster
# -----------------------------------------------------------------------------
# web too many or too few requests
# the following alarms trigger only when there are enough data.
# we assume there are enough data when:
#
# $5m_successful_old > 120
#
# i.e. when there were at least 120 requests during the 5 minutes starting
# at -10m and ending at -5m
template: web_log_5m_successful_old
on: web_log.type_requests
class: Workload
type: Web Server
component: Web log
lookup: average -5m at -5m unaligned of success
units: requests/s
every: 30s
info: average number of successful HTTP requests for the 5 minutes starting 10 minutes ago
template: web_log_5m_successful
on: web_log.type_requests
class: Workload
type: Web Server
component: Web log
lookup: average -5m unaligned of success
units: requests/s
every: 30s
info: average number of successful HTTP requests over the last 5 minutes
template: web_log_5m_requests_ratio
on: web_log.type_requests
class: Workload
type: Web Server
component: Web log
calc: ($web_log_5m_successful_old > 0)?($web_log_5m_successful * 100 / $web_log_5m_successful_old):(100)
units: %
every: 30s
warn: ($web_log_5m_successful_old > 120) ? ($this > 200 OR $this < 50) : (0)
crit: ($web_log_5m_successful_old > 120) ? ($this > 400 OR $this < 25) : (0)
delay: down 15m multiplier 1.5 max 1h
options: no-clear-notification
info: ratio of successful HTTP requests over over the last 5 minutes, \
compared with the previous 5 minutes \
(clear notification for this alarm will not be sent)
to: webmaster
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