chore: ♿️ add hotrod template and install/delete scripts (#801)

* chore: ♿️ add hotrod template and scripts

Signed-off-by: Prashant Shahi <prashant@signoz.io>

* refactor: ✨ conditionally compute image

Signed-off-by: Prashant Shahi <prashant@signoz.io>

* fix: 🩹 add signoz namespace

Signed-off-by: Prashant Shahi <prashant@signoz.io>

* chore: 🔨  fix namespace template in scripts

Signed-off-by: Prashant Shahi <prashant@signoz.io>

* docs(hotrod): 📝 Add README for hotrod k8s

Signed-off-by: Prashant Shahi <prashant@signoz.io>

Co-authored-by: Ankit Nayan <ankit@signoz.io>

sample-apps/hotrod/README.md

@@ -0,0 +1,27 @@
+# HotROD Sample Application (Kubernetes)
+
+Follow the steps in this section to install a sample application named HotR.O.D, and generate tracing data.
+
+```console
+kubectl create ns sample-application
+
+kubectl -n sample-application apply -f https://github.com/SigNoz/signoz/raw/main/sample-apps/hotrod/hotrod.yaml
+```
+
+In case, you have installed SigNoz in namespace other than `platform` or selected Helm release name other than `my-release`, follow the steps below:
+
+```console
+export HELM_RELEASE=my-release-2
+export SIGNOZ_NAMESPACE=platform-2
+export HOTROD_NAMESPACE=sample-application-2
+
+curl -sL https://github.com/SigNoz/signoz/raw/main/sample-apps/hotrod/hotrod-install.sh | bash
+```
+
+To delete sample application:
+
+```console
+export HOTROD_NAMESPACE=sample-application-2
+
+curl -sL https://github.com/SigNoz/signoz/raw/main/sample-apps/hotrod/hotrod-delete.sh | bash
+```

sample-apps/hotrod/hotrod-delete.sh

@@ -0,0 +1,20 @@
+#!/bin/bash
+
+cd "$(dirname "${BASH_SOURCE[0]}")";
+
+HOTROD_NAMESPACE=${HOTROD_NAMESPACE:-"sample-application"}
+
+if [[ "${HOTROD_NAMESPACE}" == "default" || "${HOTROD_NAMESPACE}" == "kube-system" || "${HOTROD_NAMESPACE}" == "platform" ]]; then
+    echo "Default k8s namespace and SigNoz namespace must not be deleted"
+    echo "Deleting components only"
+    kubectl delete --namespace="${HOTROD_NAMESPACE}" -f <(cat hotrod-template.yaml || curl -sL https://github.com/SigNoz/signoz/raw/main/sample-apps/hotrod/hotrod-template.yaml)
+else
+    echo "Delete HotROD sample app namespace ${HOTROD_NAMESPACE}"
+    kubectl delete namespace "${HOTROD_NAMESPACE}"
+fi
+
+if [ $? -ne 0 ]; then
+    echo "❌ Failed to delete HotROD sample application"
+else
+    echo "✅ Succesfully deleted HotROD sample application"
+fi

sample-apps/hotrod/hotrod-install.sh

@@ -0,0 +1,52 @@
+#!/bin/bash
+
+cd "$(dirname "${BASH_SOURCE[0]}")";
+
+# Namespace to install sample app
+HOTROD_NAMESPACE=${HOTROD_NAMESPACE:-"sample-application"}
+SIGNOZ_NAMESPACE="${SIGNOZ_NAMESPACE:-platform}"
+
+# HotROD's docker image
+if [[ -z $HOTROD_IMAGE ]]; then
+    HOTROD_REPO="${HOTROD_REPO:-jaegertracing/example-hotrod}"
+    HOTROD_TAG="${HOTROD_TAG:-1.30}"
+    HOTROD_IMAGE="${HOTROD_REPO}:${HOTROD_TAG}"
+fi
+
+# Locust's docker image
+if [[ -z $LOCUST_IMAGE ]]; then
+    LOCUST_REPO="${LOCUST_REPO:-grubykarol/locust}"
+    LOCUST_TAG="${LOCUST_TAG:-0.8.1-py3.6}"
+    LOCUST_IMAGE="${LOCUST_REPO}:${LOCUST_TAG}"
+fi
+
+# Helm release name
+HELM_RELEASE="${HELM_RELEASE:-my-release}"
+
+# Otel Collector service address
+if [[ -z $JAEGER_ENDPOINT ]]; then
+    if [[ "$HELM_RELEASE" == *"signoz"* ]]; then
+        JAEGER_ENDPOINT="http://${HELM_RELEASE}-otel-collector.${SIGNOZ_NAMESPACE}.svc.cluster.local:14268/api/traces"
+    else
+        JAEGER_ENDPOINT="http://${HELM_RELEASE}-signoz-otel-collector.${SIGNOZ_NAMESPACE}.svc.cluster.local:14268/api/traces"
+    fi
+fi
+
+# Create namespace for sample application if does not exist
+kubectl create namespace "$HOTROD_NAMESPACE" --save-config --dry-run -o yaml 2>/dev/null | kubectl apply -f -
+
+# Setup sample apps into specified namespace
+kubectl apply --namespace="${HOTROD_NAMESPACE}" -f <( \
+    (cat hotrod-template.yaml 2>/dev/null || curl -sL https://github.com/SigNoz/signoz/raw/main/sample-apps/hotrod/hotrod-template.yaml) | \
+        HOTROD_NAMESPACE="${HOTROD_NAMESPACE}" \
+        HOTROD_IMAGE="${HOTROD_IMAGE}" \
+        LOCUST_IMAGE="${LOCUST_IMAGE}" \
+        JAEGER_ENDPOINT="${JAEGER_ENDPOINT}" \
+        envsubst \
+    )
+
+if [ $? -ne 0 ]; then
+    echo "❌ Failed to deploy HotROD sample application"
+else
+    echo "✅ Succesfully deployed HotROD sample application"
+fi

sample-apps/hotrod/hotrod-template.yaml

@@ -0,0 +1,223 @@
+apiVersion: v1
+kind: ConfigMap
+metadata:
+  name: locust-cm
+data:
+  ATTACKED_HOST: http://hotrod:8080
+---
+apiVersion: v1
+kind: ConfigMap
+metadata:
+  name: scripts-cm
+data:
+  locustfile.py: |
+    from locust import HttpLocust, TaskSet, task
+    class UserTasks(TaskSet):
+        @task
+        def rachel(self):
+            self.client.get("/dispatch?customer=123&nonse=0.6308392664170006")
+        @task
+        def trom(self):
+            self.client.get("/dispatch?customer=392&nonse=0.015296363321630757")
+        @task
+        def japanese(self):
+            self.client.get("/dispatch?customer=731&nonse=0.8022286220408668")
+        @task
+        def coffee(self):
+            self.client.get("/dispatch?customer=567&nonse=0.0022220379420636593")
+    class WebsiteUser(HttpLocust):
+        task_set = UserTasks
+---
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  labels:
+    service: hotrod
+  name: hotrod
+spec:
+  replicas: 1
+  selector:
+    matchLabels:
+      service: hotrod
+  strategy: {}
+  template:
+    metadata:
+      labels:
+        service: hotrod
+    spec:
+      containers:
+        - args:
+            - all
+          env:
+            - name: JAEGER_ENDPOINT
+              value: ${JAEGER_ENDPOINT}
+          image: ${HOTROD_IMAGE}
+          imagePullPolicy: IfNotPresent
+          name: hotrod
+          ports:
+            - containerPort: 8080
+          resources:
+            requests:
+              cpu: 100m
+              memory: 100Mi
+            limits:
+              cpu: 200m
+              memory: 200Mi
+      restartPolicy: Always
+---
+apiVersion: v1
+kind: Service
+metadata:
+  labels:
+    service: hotrod
+  name: hotrod
+spec:
+  ports:
+  - name: "8080"
+    port: 8080
+    targetPort: 8080
+  selector:
+    service: hotrod
+---
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  annotations:
+    deployment.kubernetes.io/revision: "1"
+  labels:
+    role: locust-master
+  name: locust-master
+spec:
+  replicas: 1
+  selector:
+    matchLabels:
+      role: locust-master
+  strategy:
+    rollingUpdate:
+      maxSurge: 1
+      maxUnavailable: 1
+    type: RollingUpdate
+  template:
+    metadata:
+      labels:
+        role: locust-master
+    spec:
+      containers:
+      - image: ${LOCUST_IMAGE}
+        imagePullPolicy: IfNotPresent
+        name: locust-master
+        env:
+          - name: ATTACKED_HOST
+            valueFrom:
+              configMapKeyRef:
+                name: locust-cm
+                key: ATTACKED_HOST
+          - name: LOCUST_MODE
+            value: MASTER
+          - name: LOCUST_OPTS
+            value: --print-stats
+        volumeMounts:
+          - mountPath: /locust
+            name: locust-scripts
+        ports:
+        - containerPort: 5557
+          name: comm
+        - containerPort: 5558
+          name: comm-plus-1
+        - containerPort: 8089
+          name: web-ui
+        resources:
+          requests:
+            cpu: 100m
+            memory: 100Mi
+          limits:
+            cpu: 200m
+            memory: 200Mi
+        terminationMessagePath: /dev/termination-log
+        terminationMessagePolicy: File
+      dnsPolicy: ClusterFirst
+      restartPolicy: Always
+      schedulerName: default-scheduler
+      securityContext: {}
+      terminationGracePeriodSeconds: 30
+      volumes:
+      - name: locust-scripts
+        configMap:
+          name: scripts-cm
+---
+apiVersion: v1
+kind: Service
+metadata:
+  labels:
+    role: locust-master
+  name: locust-master
+spec:
+  ports:
+  - port: 5557
+    name: communication
+  - port: 5558
+    name: communication-plus-1
+  - port: 8089
+    targetPort: 8089
+    name: web-ui
+  selector:
+    role: locust-master
+---
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  annotations:
+    deployment.kubernetes.io/revision: "1"
+  labels:
+    role: locust-slave
+  name: locust-slave
+spec:
+  replicas: 1
+  selector:
+    matchLabels:
+      role: locust-slave
+  strategy:
+    rollingUpdate:
+      maxSurge: 1
+      maxUnavailable: 1
+    type: RollingUpdate
+  template:
+    metadata:
+      labels:
+        role: locust-slave
+    spec:
+      containers:
+      - image: ${LOCUST_IMAGE}
+        imagePullPolicy: IfNotPresent
+        name: locust-slave
+        env:
+          - name: ATTACKED_HOST
+            valueFrom:
+              configMapKeyRef:
+                name: locust-cm
+                key: ATTACKED_HOST
+          - name: LOCUST_MODE
+            value: SLAVE
+          - name: LOCUST_MASTER
+            value: locust-master
+        volumeMounts:
+          - mountPath: /locust
+            name: locust-scripts
+        resources:
+          requests:
+            cpu: 100m
+            memory: 100Mi
+          limits:
+            cpu: 200m
+            memory: 200Mi
+        terminationMessagePath: /dev/termination-log
+        terminationMessagePolicy: File
+      dnsPolicy: ClusterFirst
+      restartPolicy: Always
+      schedulerName: default-scheduler
+      securityContext: {}
+      terminationGracePeriodSeconds: 30
+      volumes:
+      - name: locust-scripts
+        configMap:
+          name: scripts-cm