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+
+# unmatched lines
+
+# the following alarms trigger only when there are enough data.
+# we assume there are enough data when:
+#
+# $1m_total_requests > 120
+#
+# i.e. when there are at least 120 requests during the last minute
+
+ template: web_log_1m_total_requests
+ on: web_log.requests
+ class: Workload
+ type: Web Server
+component: Web log
+ families: *
+ lookup: sum -1m unaligned
+ calc: ($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
+ families: *
+ 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:
+#
+# $1m_requests > 120
+#
+# i.e. when there are at least 120 requests during the last minute
+
+ template: web_log_1m_requests
+ on: web_log.type_requests
+ class: Workload
+ type: Web Server
+component: Web log
+ families: *
+ lookup: sum -1m unaligned
+ calc: ($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
+ families: *
+ 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
+ families: *
+ 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
+ families: *
+ 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
+ families: *
+ 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:
+#
+# $1m_requests > 120
+#
+# i.e. when there are at least 120 requests during the last minute
+
+ template: web_log_10m_response_time
+ on: web_log.request_processing_time
+ class: Latency
+ type: System
+component: Web log
+ families: *
+ lookup: average -10m unaligned of avg
+ units: ms
+ every: 30s
+ info: average HTTP response time over the last 10 minutes
+
+ template: web_log_web_slow
+ on: web_log.request_processing_time
+ class: Latency
+ type: Web Server
+component: Web log
+ families: *
+ lookup: average -1m unaligned of avg
+ units: ms
+ every: 10s
+ green: 500
+ red: 1000
+ warn: ($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:
+#
+# $5m_successful_old > 120
+#
+# i.e. when there were at least 120 requests during the 5 minutes starting
+# at -10m and ending at -5m
+
+ template: web_log_5m_successful_old
+ on: web_log.type_requests
+ class: Workload
+ type: Web Server
+component: Web log
+ families: *
+ lookup: average -5m at -5m unaligned of success
+ units: requests/s
+ every: 30s
+ info: average number of successful HTTP requests for the 5 minutes starting 10 minutes ago
+
+ template: web_log_5m_successful
+ on: web_log.type_requests
+ class: Workload
+ type: Web Server
+component: Web log
+ families: *
+ lookup: average -5m unaligned of success
+ units: requests/s
+ every: 30s
+ info: average number of successful HTTP requests over the last 5 minutes
+
+ template: web_log_5m_requests_ratio
+ on: web_log.type_requests
+ class: Workload
+ type: Web Server
+component: Web log
+ families: *
+ calc: ($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