create K8S cluster by TOSCA

[oom.git] / TOSCA / kubernetes-cluster-TOSCA / policies / scale.clj

diff --git a/TOSCA/kubernetes-cluster-TOSCA/policies/scale.clj b/TOSCA/kubernetes-cluster-TOSCA/policies/scale.clj
new file mode 100644 (file)
index 0000000..369239a
--- /dev/null
+++ b/TOSCA/kubernetes-cluster-TOSCA/policies/scale.clj
@@ -0,0 +1,66 @@
+;;;; ============LICENSE_START==========================================
+;;;; ===================================================================
+;;;; Copyright © 2017 AT&T
+;;;;
+;;;; Licensed under the Apache License, Version 2.0 (the "License");
+;;;; you may not use this file except in compliance with the License.
+;;;; You may obtain a copy of the License at
+;;;;
+;;;;         http://www.apache.org/licenses/LICENSE-2.0
+;;;;
+;;;; Unless required by applicable law or agreed to in writing, software
+;;;; distributed under the License is distributed on an "AS IS" BASIS,
+;;;; WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+;;;; See the License for the specific language governing permissions and
+;;;; limitations under the License.
+;;;;============LICENSE_END============================================
+
+(where (service #"{{service_selector}}")
+  #(info "got event: " %)
+
+  (where (not (expired? event))
+    (moving-time-window {{moving_window_size}}
+      (fn [events]
+        (let [
+               hostmap (atom {})
+               hostcnt (atom {})
+             ]
+          (do
+            (doseq [m events]
+              (if (nil? (@hostmap (m :host)))
+                (do
+                  (swap! hostmap assoc (m :host) (m :metric))
+                  (swap! hostcnt assoc (m :host) 1)
+                )
+                (do
+                  (swap! hostmap assoc (m :host) (+ (m :metric) (@hostmap (m :host))))
+                  (swap! hostcnt assoc (m :host) (inc (@hostcnt (m :host))))
+                )
+              )
+            )
+            (doseq [entry @hostmap]
+              (swap! hostmap assoc (key entry) (/ (val entry) (@hostcnt (key entry))))
+            )
+
+            (let
+              [ hostcnt (count @hostmap)
+                conns (/ (apply + (map (fn [a] (val a)) @hostmap)) hostcnt)
+                cooling (not (nil? (riemann.index/lookup index "scaling" "suspended")))]
+
+              (do
+                (info "cooling=" cooling " scale_direction={{scale_direction}} hostcnt=" hostcnt " scale_threshold={{scale_threshold}} conns=" conns)
+                (if (and (not cooling) ({{scale_direction}} hostcnt {{scale_limit}}) ({{scale_direction}} {{scale_threshold}} conns))
+                  (do
+                    (info "=== SCALE ===" "{{scale_direction}}")
+                    (process-policy-triggers {})
+                    (riemann.index/update index {:host "scaling" :service "suspended" :time (unix-time) :description "cooldown flag" :metric 0 :ttl {{cooldown_time}} :state "ok"})
+                  )
+                )
+              )
+            )
+          )
+        )
+      )
+    )
+  )
+)