chore: Add Evaluation instructions

examples/observability/Makefile

@@ -3,7 +3,7 @@ LFC_NAMESPACE ?= keptn-lifecycle-controller-system
 PODTATO_NAMESPACE ?= podtato-kubectl
 
 .PHONY: install
-install:
+install:undeploy-podtatohead
 	@echo "-----------------------------------"
 	@echo "Create Namespace and install Jaeger"
 	@echo "-----------------------------------"
@@ -91,7 +91,7 @@ uninstall:
 deploy-podtatohead:
 	kubectl create namespace "$(PODTATO_NAMESPACE)" --dry-run=client -o yaml | kubectl apply -f -
 	kubectl annotate namespace "$(PODTATO_NAMESPACE)" keptn.sh/lifecycle-controller=enabled --overwrite
-	kubectl apply -f ../podtatohead-deployment/.
+	kubectl apply -f ./assets/podtatohead-deployment-evaluation/.
 	kubectl wait --for=condition=available deployment/podtato-head-entry -n podtato-kubectl --timeout=120s
 	@echo "Watch Workload Deployment Progress: kubectl get keptnworkloadinstances -n podtato-kubectl -w"
 

examples/observability/README.md

@@ -2,6 +2,7 @@
 
 In this example, we will show you an example configuration for enabling the operator to send OpenTelemetry traces and metrics to the [OpenTelemetry Collector](https://github.com/open-telemetry/opentelemetry-collector).
 The Collector will then be used to forward the gathered data to [Jaeger](https://www.jaegertracing.io) and [Prometheus](https://prometheus.io).
+The application deployed uses an example of pre-Deployment Evaluation based on prometheus metrics.
 
 # TL;DR
 * You can install the whole demo using: `make install`

examples/observability/assets/podtatohead-deployment-evaluation/.gitignore

@@ -0,0 +1 @@
+/slack-secret.yaml

examples/observability/assets/podtatohead-deployment-evaluation/README.md

@@ -0,0 +1,5 @@
+### Create Secret for Slack here
+
+```
+kubectl create secret generic slack-notification --from-literal=SECURE_DATA='{"slack_hook":"<WebHook>","text":"Deployed PodTatoHead Application"}' -n podtato-kubectl -oyaml --dry-run > slack-secret.yaml
+```

examples/observability/assets/podtatohead-deployment-evaluation/app.yaml

@@ -0,0 +1,24 @@
+apiVersion: lifecycle.keptn.sh/v1alpha1
+kind: KeptnApp
+metadata:
+  name: podtato-head
+  namespace: podtato-kubectl
+spec:
+  version: "1.3"
+  workloads:
+    - name: podtato-head-left-arm
+      version: 0.1.0
+    - name: podtato-head-left-leg
+      version: 0.1.0
+    - name: podtato-head-entry
+      version: 0.1.0
+    - name: podtato-head-right-arm
+      version: 0.1.0
+    - name: podtato-head-left-arm
+      version: 0.1.0
+    - name: podtato-head-hat
+      version: 0.1.0
+  postDeploymentTasks:
+    - post-deployment-hello
+  preDeploymentEvaluations:     #Comment out this two lines if you do not have a prometheus installation
+    - my-prometheus-definition

examples/observability/assets/podtatohead-deployment-evaluation/check_entry.yaml

@@ -0,0 +1,12 @@
+apiVersion: lifecycle.keptn.sh/v1alpha1
+kind: KeptnTaskDefinition
+metadata:
+  name: check-entry-service
+  namespace: podtato-kubectl
+spec:
+  function:
+    httpRef:
+      url: https://raw.githubusercontent.com/keptn-sandbox/lifecycle-controller/main/functions-runtime/samples/ts/http.ts
+    parameters:
+      map:
+        url: http://podtato-head-entry.podtato-kubectl.svc.cluster.local:9000

examples/observability/assets/podtatohead-deployment-evaluation/keptnevaluationdefinition.yaml

@@ -0,0 +1,15 @@
+apiVersion: lifecycle.keptn.sh/v1alpha1
+kind: KeptnEvaluationDefinition
+metadata:
+  name: my-prometheus-definition
+  namespace: podtato-kubectl
+spec:
+  source: prometheus
+  objectives:
+    - name: available-cpus
+      query: "sum(kube_pod_container_resource_limits{resource='cpu'}) - sum(kube_node_status_capacity{resource='cpu'})"
+      evaluationTarget: ">1" #string: can only be starting with < or >
+    - name: consumed-memory
+      query: "sum(kube_node_status_capacity{resource='memory'})"
+      evaluationTarget: "<1000000000000" #string: can only be starting with < or >
+

examples/observability/assets/podtatohead-deployment-evaluation/keptnevaluationprovider.yaml

@@ -0,0 +1,7 @@
+apiVersion: lifecycle.keptn.sh/v1alpha1
+kind: KeptnEvaluationProvider
+metadata:
+  name: prometheus
+  namespace: podtato-kubectl
+spec:
+  targetServer: "http://prometheus-k8s.monitoring.svc.cluster.local:9090" #string