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-rw-r--r--health/health.d/web_log.conf30
1 files changed, 30 insertions, 0 deletions
diff --git a/health/health.d/web_log.conf b/health/health.d/web_log.conf
index d8be88b47..031adc2ea 100644
--- a/health/health.d/web_log.conf
+++ b/health/health.d/web_log.conf
@@ -85,6 +85,36 @@ families: *
info: the ratio of HTTP internal server errors (5xx), over the last minute
to: webmaster
+# unmatched lines
+
+# the following alarms trigger only when there are enough data.
+# we assume there are enough data when:
+#
+# $1m_total_requests > 120
+#
+# i.e. when there are at least 120 requests during the last minute
+
+template: 1m_total_requests
+ on: web_log.response_codes
+families: *
+ lookup: sum -1m unaligned
+ calc: ($this == 0)?(1):($this)
+ units: requests
+ every: 10s
+ info: the sum of all HTTP requests over the last minute
+
+template: 1m_unmatched
+on: web_log.response_codes
+families: *
+ lookup: sum -1m unaligned of unmatched
+ calc: $this * 100 / $1m_total_requests
+ units: %
+ every: 10s
+ warn: ($1m_total_requests > 120) ? ($this > 1) : ( 0 )
+ crit: ($1m_total_requests > 120) ? ($this > 5) : ( 0 )
+ delay: up 1m down 5m multiplier 1.5 max 1h
+ info: the ratio of unmatched lines, over the last minute
+ to: webmaster
# -----------------------------------------------------------------------------
# web slow