Added logging via Filebeat -> Logstash

logstash/configmap.yaml

@@ -0,0 +1,18 @@
+apiVersion: v1
+kind: ConfigMap
+metadata:
+  name: logstash-config
+  namespace: app-notifications
+data:
+  logstash.conf: |
+    input {
+      beats {
+        port => 5044
+      }
+    }
+      filter {
+         if [level] == "DEBUG" { drop {} }
+      }
+    output {
+      stdout { codec => json }  # for testing
+    }

logstash/deployment.yaml

@@ -0,0 +1,28 @@
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: logstash
+  namespace: app-notifications
+spec:
+  replicas: 1
+  selector:
+    matchLabels:
+      app: logstash
+  template:
+    metadata:
+      labels:
+        app: logstash
+    spec:
+      containers:
+      - name: logstash
+        image: docker.elastic.co/logstash/logstash:8.12.1
+        ports:
+        - containerPort: 5044
+        volumeMounts:
+        - name: logstash-config
+          mountPath: /usr/share/logstash/pipeline/logstash.conf
+          subPath: logstash.conf
+      volumes:
+      - name: logstash-config
+        configMap:
+          name: logstash-config

logstash/service.yaml

@@ -0,0 +1,12 @@
+apiVersion: v1
+kind: Service
+metadata:
+  name: logstash
+  namespace: app-notifications
+spec:
+  selector:
+    app: logstash
+  ports:
+    - protocol: TCP
+      port: 5044
+      targetPort: 5044