Added first draft of chaos engineering chapter

Signed-off-by: Russ Miles <[email protected]>

Author: russmiles

.gitignore

@@ -3,4 +3,5 @@
 **/target
 **/.idea
 **/dependency-reduced-pom.xml
-
+**/journal.json
+**/chaostoolkit.log

03-path-application-development/308-cicd-workflows/readme.adoc

@@ -18,6 +18,6 @@ Once you've looked at the options above, you are ready to continue with the work
 
 [align="center", cols="1", grid="none", frame="none"]
 |=====
-|image:button-continue-developer.png[link=../../04-path-security-and-networking/401-configmaps-and-secrets]
+|image:button-continue-developer.png[link=../../03-path-application-development/310-chaos-engineering/]
 |link:../../developer-path.adoc[Go to Developer Index]
 |=====

03-path-application-development/310-chaos-engineering/experiments/app.yml

@@ -0,0 +1,96 @@
+apiVersion: v1
+kind: Service
+metadata: 
+  name: name-service
+spec: 
+  selector: 
+    app: name-pod
+  ports:
+    - port: 8080
+---
+apiVersion: extensions/v1beta1
+kind: ReplicaSet
+metadata:
+  name: name-rs
+spec:
+  replicas: 1
+  template:
+    metadata:
+      labels:
+        app: name-pod
+    spec:
+      containers:
+      - name: name
+        image: arungupta/name-service:latest
+        ports:
+        - containerPort: 8080
+---
+apiVersion: v1
+kind: Service
+metadata: 
+  name: greeter-service
+spec: 
+  selector: 
+    app: greeter-pod
+  ports:
+    - port: 8080
+---
+apiVersion: extensions/v1beta1
+kind: ReplicaSet
+metadata:
+  name: greeter-rs
+spec:
+  replicas: 1
+  template:
+    metadata:
+      labels:
+        app: greeter-pod
+    spec:
+      containers:
+      - name: name
+        image: arungupta/greeter-service:latest
+        ports:
+        - containerPort: 8080
+---
+apiVersion: v1
+kind: Service
+metadata: 
+  name: webapp-service
+spec: 
+  selector: 
+    app: webapp-pod
+  ports:
+    - name: web
+      port: 80
+      targetPort: 8080
+  type: LoadBalancer
+---
+apiVersion: extensions/v1beta1
+kind: ReplicaSet
+metadata:
+  name: webapp-rs
+spec:
+  replicas: 1
+  template:
+    metadata:
+      labels:
+        app: webapp-pod
+    spec:
+      containers:
+      - name: webapp-pod
+        image: arungupta/webapp-service:latest
+        env:
+        - name: NAME_SERVICE_HOST
+          value: name-service
+        - name: NAME_SERVICE_PORT
+          value: "8080"
+        - name: NAME_SERVICE_PATH
+          value: /
+        - name: GREETER_SERVICE_HOST
+          value: greeter-service
+        - name: GREETER_SERVICE_PORT
+          value: "8080"
+        - name: GREETER_SERVICE_PATH
+          value: /
+        ports:
+        - containerPort: 8080

03-path-application-development/310-chaos-engineering/experiments/experiment.json

@@ -0,0 +1,75 @@
+{
+    "version": "1.0.0",
+    "title": "Terminating the greeting service should not impact users",
+    "description": "How does the greeting service unavailbility impacts our users? Do they see an error or does the webapp gets slower?",
+    "tags": [
+        "kubernetes",
+        "aws"
+    ],
+    "configuration": {
+        "web_app_url": {
+            "type": "env",
+            "key": "WEBAPP_URL"
+        }
+    },
+    "steady-state-hypothesis": {
+        "title": "Services are all available and healthy",
+        "probes": [
+            {
+                "type": "probe",
+                "name": "application-should-be-alive-and-healthy",
+                "tolerance": true,
+                "provider": {
+                    "type": "python",
+                    "module": "chaosk8s.pod.probes",
+                    "func": "pods_in_phase",
+                    "arguments": {
+                        "label_selector": "app=webapp-pod",
+                        "phase": "Running",
+                        "ns": "default"
+                    }
+                }
+            },
+            {
+                "type": "probe",
+                "name": "application-must-respond-normally",
+                "tolerance": 200,
+                "provider": {
+                    "type": "http",
+                    "url": "${web_app_url}",
+                    "timeout": 3
+                }
+            }
+        ]
+    },
+    "method": [
+        {
+            "type": "action",
+            "name": "terminate-greeting-service",
+            "provider": {
+                "type": "python",
+                "module": "chaosk8s.pod.actions",
+                "func": "terminate_pods",
+                "arguments": {
+                    "label_selector": "app=greeter-pod",
+                    "ns": "default"
+                }
+            }
+        },
+        {
+            "type": "probe",
+            "name": "fetch-application-logs",
+            "provider": {
+                "type": "python",
+                "module": "chaosk8s.pod.probes",
+                "func": "read_pod_logs",
+                "arguments": {
+                    "label_selector": "app=webapp-pod",
+                    "last": "20s",
+                    "ns": "default"
+                }
+            }
+        }
+    ],
+    "rollbacks": []
+}