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# make sure we can collect web log data
template: last_collected_secs
on: web_log.response_codes
families: *
calc: $now - $last_collected_t
units: seconds ago
every: 10s
warn: $this > (($status >= $WARNING) ? ($update_every) : ( 5 * $update_every))
crit: $this > (($status == $CRITICAL) ? ($update_every) : (60 * $update_every))
delay: down 5m multiplier 1.5 max 1h
info: number of seconds since the last successful data collection
to: webmaster
# -----------------------------------------------------------------------------
# high level response code alarms
# the following alarms trigger only when there are enough data.
# we assume there are enough data when:
#
# $1m_requests > 120
#
# i.e. when there are at least 120 requests during the last minute
template: 1m_requests
on: web_log.response_statuses
families: *
lookup: sum -1m unaligned
calc: ($this == 0)?(1):($this)
units: requests
every: 10s
info: the sum of all HTTP requests over the last minute
template: 1m_successful
on: web_log.response_statuses
families: *
lookup: sum -1m unaligned of successful_requests
calc: $this * 100 / $1m_requests
units: %
every: 10s
warn: ($1m_requests > 120) ? ($this < (($status >= $WARNING ) ? ( 95 ) : ( 85 )) ) : ( 0 )
crit: ($1m_requests > 120) ? ($this < (($status == $CRITICAL) ? ( 85 ) : ( 75 )) ) : ( 0 )
delay: up 2m down 15m multiplier 1.5 max 1h
info: the ratio of successful HTTP responses (1xx, 2xx, 304) over the last minute
to: webmaster
template: 1m_redirects
on: web_log.response_statuses
families: *
lookup: sum -1m unaligned of redirects
calc: $this * 100 / $1m_requests
units: %
every: 10s
warn: ($1m_requests > 120) ? ($this > (($status >= $WARNING ) ? ( 1 ) : ( 20 )) ) : ( 0 )
crit: ($1m_requests > 120) ? ($this > (($status == $CRITICAL) ? ( 20 ) : ( 30 )) ) : ( 0 )
delay: up 2m down 15m multiplier 1.5 max 1h
info: the ratio of HTTP redirects (3xx except 304) over the last minute
to: webmaster
template: 1m_bad_requests
on: web_log.response_statuses
families: *
lookup: sum -1m unaligned of bad_requests
calc: $this * 100 / $1m_requests
units: %
every: 10s
warn: ($1m_requests > 120) ? ($this > (($status >= $WARNING) ? ( 10 ) : ( 30 )) ) : ( 0 )
crit: ($1m_requests > 120) ? ($this > (($status == $CRITICAL) ? ( 30 ) : ( 50 )) ) : ( 0 )
delay: up 2m down 15m multiplier 1.5 max 1h
info: the ratio of HTTP bad requests (4xx) over the last minute
to: webmaster
template: 1m_internal_errors
on: web_log.response_statuses
families: *
lookup: sum -1m unaligned of server_errors
calc: $this * 100 / $1m_requests
units: %
every: 10s
warn: ($1m_requests > 120) ? ($this > (($status >= $WARNING) ? ( 1 ) : ( 2 )) ) : ( 0 )
crit: ($1m_requests > 120) ? ($this > (($status == $CRITICAL) ? ( 2 ) : ( 5 )) ) : ( 0 )
delay: up 2m down 15m multiplier 1.5 max 1h
info: the ratio of HTTP internal server errors (5xx), over the last minute
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: 10m_response_time
on: web_log.response_time
families: *
lookup: average -10m unaligned of avg
units: ms
every: 30s
info: the average time to respond to HTTP requests, over the last 10 minutes
template: web_slow
on: web_log.response_time
families: *
lookup: average -1m unaligned of avg
units: ms
every: 10s
green: 500
red: 1000
warn: ($1m_requests > 120) ? ($this > $green && $this > ($10m_response_time * 2) ) : ( 0 )
crit: ($1m_requests > 120) ? ($this > $red && $this > ($10m_response_time * 4) ) : ( 0 )
delay: down 15m multiplier 1.5 max 1h
info: the average time to respond to HTTP requests, over the last 1 minute
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: 5m_successful_old
on: web_log.response_statuses
families: *
lookup: average -5m at -5m unaligned of successful_requests
units: requests/s
every: 30s
info: average rate of successful HTTP requests over the last 5 minutes
template: 5m_successful
on: web_log.response_statuses
families: *
lookup: average -5m unaligned of successful_requests
units: requests/s
every: 30s
info: average successful HTTP requests over the last 5 minutes
template: 5m_requests_ratio
on: web_log.response_codes
families: *
calc: ($5m_successful_old > 0)?($5m_successful * 100 / $5m_successful_old):(100)
units: %
every: 30s
warn: ($5m_successful_old > 120) ? ($this > 200 OR $this < 50) : (0)
crit: ($5m_successful_old > 120) ? ($this > 400 OR $this < 25) : (0)
delay: down 15m multiplier 1.5 max 1h
options: no-clear-notification
info: the percentage of successful web requests 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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