Merge pull request 'introduce-monitoring' (#2) from introduce-monitoring into main

Reviewed-on: #2

deps.edn

@@ -13,7 +13,8 @@
   orchestra/orchestra {:mvn/version "2021.01.01-1"}
   aero/aero {:mvn/version "1.1.6"}
   cheshire/cheshire {:mvn/version "5.13.0"}
-  com.widdindustries/cljc.java-time {:mvn/version "0.1.21"}}
+  com.widdindustries/cljc.java-time {:mvn/version "0.1.21"}
+  org.babashka/http-client {:mvn/version "0.3.11"}}
  ;; ---------------------------------------------------------
 
  ;; ---------------------------------------------------------

src/dda/backup/infrastructure.clj

@@ -2,6 +2,7 @@
   "Intenden for internal use, represents the infrastructure layer."
   (:require [orchestra.core :refer [defn-spec]]
             [babashka.tasks :as t]
+            [babashka.http-client :as http]
             [dda.backup.core.domain :as core]))
 
 (defn-spec execute-out! string?
@@ -32,3 +33,8 @@
         (println c))
       (when-not dry-run
         (apply t/shell c)))))
+
+(defn-spec post! nil?
+  [url string?
+   content string?]
+  (http/post url {:body content}))

src/dda/backup/monitoring.clj

@@ -0,0 +1,49 @@
+(ns dda.backup.monitoring
+  (:require
+   [orchestra.core :refer [defn-spec]]
+   [clojure.spec.alpha :as s]
+   [dda.backup.monitoring.domain :as domain]
+   [dda.backup.infrastructure :as i]))
+
+(def default {:url "http://prometheus-pushgateway.monitoring.svc.cluster.local:9091/metrics/job"
+              :namespace "default"
+              :metrics {:kube_job_status_active 0
+                        :kube_job_status_failed 0
+                        :kube_job_status_succeeded 0}})
+
+(s/def ::config (s/keys :req-un [::name]
+                        :opt-un [::url ::metrics ::namespace]))
+
+(defn- config-w-defaults
+  [config]
+    (merge default config))
+
+(defn-spec send-metrics! nil?
+  [config ::config]
+  (let [config-2-use (config-w-defaults config)
+        {:keys [url name]} config-2-use]
+    (try 
+      (i/post! (str url "/" name) (domain/collect-metrics config-2-use))
+      (catch Exception e (println (str "Warn: unable to send log" (.getMessage e)))))))
+
+(defn-spec backup-start-metrics! nil?
+  [config ::config]
+  (send-metrics!
+   {:name "backup"
+    :metrics {:kube_job_status_active 1
+              :kube_job_status_start_time (long (/ (System/currentTimeMillis) 1000))}}))
+
+(defn-spec backup-success-metrics! nil?
+  [config ::config]
+  (send-metrics!
+   {:name "backup"
+    :metrics {:kube_job_status_succeeded 1
+              :kube_job_status_completion_time (long (/ (System/currentTimeMillis) 1000))}}))
+
+(defn-spec backup-fail-metrics! nil?
+  [config ::config]
+  (send-metrics!
+   {:name "backup"
+    :metrics {:kube_job_status_failed 1
+              :kube_job_status_completion_time (long (/ (System/currentTimeMillis) 1000))}}))
+

src/dda/backup/monitoring/domain.clj

@@ -0,0 +1,23 @@
+(ns dda.backup.monitoring.domain
+  (:require
+   [orchestra.core :refer [defn-spec]]
+   [clojure.spec.alpha :as s]
+   [clojure.string :as st]))
+
+(s/def ::url string?)
+(s/def ::name string?)
+(s/def ::namespace string?)
+(s/def ::metrics map?)
+
+(s/def ::config (s/keys :req-un [::url ::name ::metrics ::namespace]))
+
+(defn-spec collect-metrics string?
+  [config ::config]
+  (let [{:keys [metrics namespace]} config]
+    (str
+     (->> metrics
+          (map (fn [entry] (str (name (key entry))
+                                "{namespace=\"" namespace "\"}" " "
+                                (val entry))))
+          (st/join "\n"))
+     "\n")))

test/dda/backup/monitoring/domain_test.clj

@@ -0,0 +1,20 @@
+(ns dda.backup.monitoring.domain-test
+  (:require
+   [clojure.test :refer [deftest is are testing run-tests]]
+   [clojure.spec.test.alpha :as st]
+   [dda.backup.monitoring.domain :as cut]))
+
+(st/instrument `cut/collect-metrics)
+
+(deftest should-collect-metrics
+  (is (= "\n"
+         (cut/collect-metrics {:url "url"
+                               :name "name"
+                               :namespace "default"
+                               :metrics {}})))
+  (is (= "metric1{namespace=\"default\"} 1\nmetric2{namespace=\"default\"} text\n"
+         (cut/collect-metrics {:url "url"
+                               :name "name"
+                               :namespace "default"
+                               :metrics {:metric1 1
+                                         :metric2 "text"}}))))