feat(agent): k8s deployment script (#3190)

* feat(agent): k8s deployment script

* tag latest image

* update tag with placeholder

* fix: allow version to be specified in parameter

* fix: kubectl apply from pipe

.github/workflows/release-version.yml

@@ -107,7 +107,7 @@ jobs:
         uses: docker/build-push-action@v5
         with:
           push: true
-          tags: kubeshop/tracetest-agent:${{ env.VERSION }}
+          tags: kubeshop/tracetest-agent:latest,kubeshop/tracetest-agent:${{ env.VERSION }}
           file: agent/Dockerfile
           build-args: |
             TRACETEST_VERSION=${{ env.VERSION }}

k8s/agent/deploy-agent.sh

@@ -0,0 +1,26 @@
+NAMESPACE=$1
+API_KEY=$2
+AGENT_VERSION="${3:-latest}"
+FILE_PATH="https://raw.githubusercontent.com/kubeshop/tracetest/k8s/agent/deploy-agent.yaml"
+
+showUsageAndExit() {
+    echo "Usage: ./script <namespace> <api-key> (<version>)?"
+    echo "Examples:"
+    echo "./script tracetest my-api-key"
+    echo "./script my-namespace my-api-key v0.13.9"
+
+    exit 1
+}
+
+if [ -z "${NAMESPACE}" ]; then
+    echo "Error: Namespace is required"
+    showUsageAndExit
+fi
+
+if [ -z "${API_KEY}" ]; then
+    echo "Error: API key is required"
+    showUsageAndExit
+fi
+
+kubectl create -n $NAMESPACE secret generic tracetest-agent-secret --from-literal=api-key=$API_KEY
+curl $FILE_PATH | sed "s/:TAG/:$AGENT_VERSION/g" | kubectl apply -n $NAMESPACE -f -

k8s/agent/deploy-agent.yaml

@@ -0,0 +1,53 @@
+---
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: tracetest-agent
+  labels:
+    app: tracetest-agent
+spec:
+  selector:
+    matchLabels:
+      app: tracetest-agent
+  template:
+    metadata:
+      labels:
+        app: tracetest-agent
+    spec:
+      containers:
+        - name: tracetest-agent
+          image: kubeshop/tracetest-agent:TAG
+          env:
+            - name: TRACETEST_API_KEY
+              valueFrom:
+                secretKeyRef:
+                  name: tracetest-agent-secret
+                  key: api-key
+
+          ports:
+            - containerPort: 4317
+            - containerPort: 4318
+          resources:
+            requests:
+              cpu: 100m
+              memory: 200Mi
+
+---
+apiVersion: v1
+kind: Service
+metadata:
+  name: tracetest-agent
+  labels:
+    app: tracetest-agent
+spec:
+  selector:
+    app: tracetest-agent
+  ports:
+    - name: grpc-collector-entrypoint
+      protocol: TCP
+      port: 4317
+      targetPort: 4317
+    - name: http-collector-entrypoint
+      protocol: TCP
+      port: 4318
+      targetPort: 4318