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49f26f9 Jun 18, 2015
@satterly @sihil @bruntonspall @troydias @andybotting
393 lines (345 sloc) 20.5 KB
; -*- mode: clojure; -*-
; vim: filetype=clojure
(require '[clj-http.client :as client]
'[cheshire.core :as json]
'[riemann.query :as query])
(def hostname (.getHostName (java.net.InetAddress/getLocalHost)))
(include "alerta.clj")
; configure the various servers that we listen on
(tcp-server :host "0.0.0.0")
(udp-server :host "0.0.0.0")
(ws-server :host "0.0.0.0")
(repl-server)
(graphite-server :host "0.0.0.0"
:protocol :tcp
:parser-fn (fn [{:keys [service] :as event}]
(if-let [[source metric]
(clojure.string/split service #"\." 2)]
(case source
"fastly" (if-let [[domain service] (clojure.string/split metric #"\." 2)]
{:host domain
:service service
:metric (:metric event)
:origin "Fastly"
:environment "PROD"
:resource domain
:type "graphiteAlert"
:time (:time event)
:tags [source]
})
"cloudwatch" (if-let [[account & metric] (clojure.string/split metric #"\.")]
(let [host (clojure.string/join ":" (butlast metric))]
{:host host
:service (last metric)
:metric (:metric event)
:origin (clojure.string/capitalize account)
:environment "PROD" ; FIXME - use "stage" if available
:resource host
:type "graphiteAlert"
:time (:time event)
:tags (into [source account] metric)
:ttl 600 ; metrics gathered every 5 minutes
}))))))
(defn parse-stream
[& children]
(fn [e] (let [new-event (assoc e
:host (str (:ip e) ":" (:host e))
:resource (:host e)
:type "gangliaAlert")]
(call-rescue new-event children))))
(defn log-info
[e]
(info e))
; reap expired events every 10 seconds
(periodically-expire 10 {:keep-keys [:host :service :environment :resource :grid :cluster :ip :tags :metric :index-time]})
; some helpful functions
(defn now []
(Math/floor (unix-time)))
(defn switch-epoch-to-elapsed
[& children]
(fn [e] ((apply with {:metric (- (now) (:metric e))} children) e)))
(defn state-to-metric
[& children]
(fn [e] ((apply with {:metric (:state e)} children) e)))
(defn event-to-cluster-event
[& children]
(fn [e] ((apply with {:service "cluster heartbeat"
:host (str (:environment e) ":" (:cluster e))
:resource (:cluster e)} children) e)))
(defn event-to-grid-event
[& children]
(fn [e] ((apply with {:service "grid heartbeat"
:host (str (:environment e) ":" (:grid e))
:resource (:grid e)
:cluster "n/a"} children) e)))
(defn lookup-metric
[metricname & children]
(let [metricsymbol (keyword metricname)]
(fn [e]
(let [metricevent (.lookup (:index @core) (:host e) metricname)]
(if-let [metricvalue (:metric metricevent)]
(call-rescue (assoc e metricsymbol metricvalue) children))))))
; set of severity functions
(defn severity
[severity message & children]
(fn [e] ((apply with {:state severity :description message} children) e)))
(def informational (partial severity "informational"))
(def normal (partial severity "normal"))
(def warning (partial severity "warning"))
(def minor (partial severity "minor"))
(def major (partial severity "major"))
(def critical (partial severity "critical"))
(defn edge-detection
[samples & children]
(let [detector (by [:host :service] (runs samples :state (apply changed :state children)))]
(fn [e] (detector e))))
(defn set-resource-from-cluster [e] (assoc e :resource (:cluster e)))
(defn proportion
[events]
(when-let [event (first events)]
(try
(riemann.folds/fold-all (fn [a b] (/ a (+ a b))) events)
(catch NullPointerException ex
(merge event :metric nil)))))
; thresholding
(let [index (default :ttl 900 (index))
alert (async-queue! :alerta {:queue-size 10000}
(alerta {}))
dedup-alert (edge-detection 1 log-info alert)
dedup-2-alert (edge-detection 2 log-info alert)
dedup-4-alert (edge-detection 4 log-info alert)
graph (async-queue! :graphite {:queue-size 1000}
(graphite {:host "graphite"
:path (fn [e] (str "riemann." (riemann.graphite/graphite-path-basic e)))}))]
(streams
(with :index-time (format "%.0f" (now))
(where (service "heartbeat")
(parse-stream
(with :ttl 300 index))
(event-to-cluster-event
(with {:event "ClusterHeartbeat" :group "Ganglia" :type "gangliaAlert" :ttl 180}
(switch-epoch-to-elapsed
(where (< metric 20)
(normal "Heartbeat from Ganglia cluster is OK" dedup-alert))) index))
(event-to-grid-event
(with {:event "GridHeartbeat" :group "Ganglia" :type "gangliaAlert" :ttl 120}
(switch-epoch-to-elapsed
(where (< metric 20)
(normal "Heartbeat from Ganglia grid is OK" dedup-alert))) index))
(else
index))))
(streams
(throttle 1 30 heartbeat))
; (streams
; (let [hosts (atom #{})]
; (fn [event]
; (swap! hosts conj (:host event))
; (index {:service "unique hosts"
; :time (unix-time)
; :metric (count @hosts)})
; ((throttle 1 10 graph) {:service "riemann unique_hosts"
; :host hostname
; :time (unix-time)
; :metric (count @hosts)}))))
; (streams
; (let [metrics (atom #{})]
; (fn [event]
; (swap! metrics conj {:host (:host event) :service (:service event)})
; (index {:service "unique services"
; :time (unix-time)
; :metric (count @metrics)})
; ((throttle 1 10 graph) {:service "riemann unique_services"
; :host hostname
; :time (unix-time)
; :metric (count @metrics)}))))
(streams
(expired
(match :service "heartbeat"
(with {:event "AgentHeartbeat" :group "Ganglia" :type "gangliaAlert"}
(switch-epoch-to-elapsed
(minor "No heartbeat from Ganglia agent" dedup-alert) log-info)))
(match :service "cluster heartbeat"
(with {:event "ClusterHeartbeat" :group "Ganglia" :type "gangliaAlert"}
(switch-epoch-to-elapsed
(minor "No heartbeat from Ganglia cluster" dedup-alert) log-info)))
(match :service "grid heartbeat"
(with {:event "GridHeartbeat" :group "Ganglia" :type "gangliaAlert"}
(switch-epoch-to-elapsed
(major "No heartbeat from Ganglia grid" dedup-alert) log-info)))))
(streams (parse-stream
(let [boot-threshold
(match :service "boottime"
(with {:event "SystemStart" :group "System"}
(switch-epoch-to-elapsed
(where (< metric 7200) (informational "System started less than 2 hours ago" dedup-alert)))))
heartbeat
(match :service "heartbeat"
(with {:event "AgentHeartbeat" :group "Ganglia"}
(switch-epoch-to-elapsed
(splitp < metric
90 (minor "Heartbeat from Ganglia agent is stale" dedup-alert)
(normal "Heartbeat from Ganglia agent is OK" dedup-alert)))))
puppet-last-run
(match :service "pup_last_run"
(where (> metric 0)
(with {:event "PuppetLastRun" :group "Puppet"}
(switch-epoch-to-elapsed
(splitp < metric
86400 (minor "Puppet has not run in more than a day" dedup-alert) ; not run in last day
7200 (warning "Puppet has not run in last 2 hours" dedup-alert) ; not run in last 2 hours
(normal "Puppet agent is running normally" dedup-alert))))
(else (with {:event "PuppetLastRun" :group "Puppet"}
(warning "Puppet metrics are stale or broken" dedup-alert)))))
puppet-resource-failed
(match :service "pup_res_failed"
(with {:event "PuppetResFailed" :group "Puppet"}
(splitp < metric
0 (warning "Puppet resources are failing" dedup-alert)
(normal "Puppet is updating all resources" dedup-alert))))
last-gumetric-collection
(match :service "gu_metric_last"
(where (> metric 0)
(with {:event "GuMgmtMetrics" :group "Ganglia"}
(switch-epoch-to-elapsed
(splitp < metric
300 (minor "Guardian management metrics not updated for 5 minutes or more" dedup-alert)
(normal "Guardian management metrics are reporting OK" dedup-alert))))
(else (with {:event "GuMgmtMetrics" :group "Ganglia"}
(warning "Guardian management metrics are stale or broken" dedup-alert)))))
disk-max-util
(match :service "part_max_used"
(with {:event "DiskMaxUtil" :group "OS"}
(splitp < metric
99 (critical "Disk utilisation for highest filesystem over threshold" dedup-alert)
(normal "Disk utilisation for highest filesystem is under threshold" dedup-alert))))
fs-util
(match :service #"^fs_util-"
(with {:event "FsUtil" :group "OS"}
(splitp < metric
95 (major "File system utilisation is very high" dedup-alert)
90 (minor "File system utilisation is high" dedup-alert)
(normal "File system utilisation is OK" dedup-alert))))
inode-util
(match :service #"^inode_util-"
(with {:event "InodeUtil" :group "OS"}
(splitp < metric
95 (major "File system inode utilisation is very high" dedup-alert)
90 (minor "File system inode utilisation is high" dedup-alert)
(normal "File system inode utilisation is OK" dedup-alert))))
swap-util
(match :service "swap_util"
(with {:event "SwapUtil" :group "OS"}
(splitp < metric
90 (minor "Swap utilisation is very high" dedup-alert)
(normal "Swap utilisation is OK" dedup-alert))))
cpu-load-five
(by [:host]
(match :service "load_five"
(with {:event "SystemLoad" :group "OS"}
(lookup-metric "cpu_num"
(split*
(fn [e] (< (* 10 (:cpu_num e)) (:metric e))) (minor "System 5-minute load average is very high" dedup-alert)
(fn [e] (< (* 6 (:cpu_num e)) (:metric e))) (warning "System 5-minute load average is high" dedup-alert)
(normal "System 5-minute load average is OK" dedup-alert))))))
disk-io-util
(match :service #"^diskio_util-"
(by [:host :service]
(stable 600 :metric
(with {:event "DiskIOUtil" :group "OS"}
(splitp < metric
99 (major "Disk IO utilisation is very high" dedup-alert)
95 (minor "Disk IO utilisation is high" dedup-alert)
(normal "Disk IO utilisation is OK" dedup-alert))))))
r2-frontend-mode
(match :service "gu_currentMode_mode-r2frontend"
(state-to-metric
(with {:event "R2Mode" :service "R2" :group "Application"}
(where (= state "NORMAL")
(normal "R2 frontend mode is OK" dedup-alert)
(else (major "R2 frontend mode is not OK" dedup-alert))))))
mysql-slave-lag
(match :service "mysql_slave_lag"
(with {:event "MySQLlag" :group "MySQL"}
(splitp < metric
14400 (major "MySQL Replication lag is very high" dedup-alert)
7200 (minor "MySQL Replication lag is high" dedup-alert)
(normal "MySQL Replication lag is OK" dedup-alert))))
ntp-offset
(match :service "ntp_offset"
(with {:event "NTPOffset" :group "OS"}
(split
(or (< 10000 metric) (> -10000 metric)) (major "NTP offset is very high (±10s)" dedup-alert)
(or (< 2000 metric) (> -2000 metric)) (minor "NTP offset is high (±2s)" dedup-alert)
(normal "NTP offset is OK" dedup-alert))))
content-api-host-item-request-time
(where* (fn [e] (and (= (:grid e) "EC2")
(= (:environment e) "PROD")
(= (:service e) "gu_item_http_time-Content-API")))
(with {:event "HostItemResponseTime" :group "Application" :grid "ContentAPI"}
(by :resource
(moving-time-window 300
(combine riemann.folds/mean
(splitp < metric
300 (minor "Content API host item response time is slow" dedup-alert)
(normal "Content API host item response time is OK" dedup-alert)))))))
content-api-host-search-request-time
(where* (fn [e] (and (= (:grid e) "EC2")
(= (:environment e) "PROD")
(= (:service e) "gu_search_http_time-Content-API")))
(with {:event "HostSearchResponseTime" :group "Application" :grid "ContentAPI"}
(by :resource
(moving-time-window 300
(combine riemann.folds/mean
(splitp < metric
200 (minor "Content API host search response time is slow" dedup-alert)
(normal "Content API host search response time is OK" dedup-alert)))))))
content-api-request-time
(where* (fn [e] (and (= (:grid e) "EC2")
(= (:environment e) "PROD")
(= (:cluster e) "contentapimq_eu-west-1")
(= (:service e) "gu_httprequests_application_time-Content-API")))
(with {:event "ResponseTime" :group "Application" :grid "ContentAPI"}
(by :cluster
(moving-time-window 30
(combine riemann.folds/mean
(adjust set-resource-from-cluster
(splitp < metric
300 (minor "Content API MQ cluster response time is slow" dedup-2-alert)
(normal "Content API MQ cluster response time is OK" dedup-2-alert))))))))
content-api-request-rate
(where* (fn [e] (and (= (:grid e) "EC2")
(= (:environment e) "PROD")
(= (:cluster e) "contentapimq_eu-west-1")
(= (:service e) "gu_httprequests_application_rate-Content-API")))
(with {:event "MQRequestRate" :group "Application" :grid "ContentAPI"}
(by :cluster
(fixed-time-window 15
(combine riemann.folds/sum
(adjust set-resource-from-cluster
(splitp < metric
70 (normal "Content API MQ total request rate is OK" dedup-2-alert)
(minor "Content API MQ total request rate is low" dedup-2-alert))))))))]
(where (not (state "expired"))
; prn
boot-threshold
heartbeat
disk-max-util
puppet-last-run
puppet-resource-failed
last-gumetric-collection
fs-util
inode-util
swap-util
cpu-load-five
disk-io-util
r2-frontend-mode
mysql-slave-lag
ntp-offset
;content-api-host-item-request-time
;content-api-host-search-request-time
;content-api-request-time
;content-api-request-rate
))))
(streams
(with {:metric 1 :host hostname :state "normal" :service "riemann events_sec"}
(rate 10 index graph))))