Adds make-release script, static k8s manifests

README.md

@@ -144,6 +144,21 @@ Find **Protocol Buffers Descriptions** at the [`./pb` directory](./pb).
     are seeing this, run `kubectl get service frontend-external -o=yaml | kubectl apply -f-`
     to trigger load balancer reconfiguration.
 
+### Option 3: Using Static Images 
+
+> 💡 Recommended for test-driving the application on an existing cluster. 
+
+**Prerequisite**: a running Kubernetes cluster. 
+
+1. Clone this repository.
+1. Deploy the application: `kubectl apply -f ./release/kubernetes-manifests`  
+1. Run `kubectl get pods` to see pods are in a healthy and ready state.
+1.  Find the IP address of your application, then visit the application on your
+    browser to confirm installation.
+
+        kubectl get service frontend-external
+
+
 ### (Optional) Deploying on a Istio-installed GKE cluster
 
 > **Note:** you followed GKE deployment steps above, run `skaffold delete` first
@@ -205,4 +220,4 @@ Find **Protocol Buffers Descriptions** at the [`./pb` directory](./pb).
 
 ---
 
-This is not an official Google project. 
+This is not an official Google project. 

hack/make-release.sh

@@ -0,0 +1,54 @@
+#!/bin/bash
+
+# set vars 
+if [ -n "$1" ]; then
+    DOCKER_REPO=$1
+else
+    echo "Must provide a docker repo"
+    exit 
+fi
+
+if [ -n "$2" ]; then
+    TAG=$2
+else
+    echo "Must provide a version tag."
+    exit 
+fi
+
+if [ -n "$3" ]; then
+    BRANCH=$3
+else
+    echo "Must provide a git branch."
+    exit 
+fi
+
+# iterate over all services: build + push image, inject tag into k8s manifest. 
+for dir in ./src/*/    
+do
+    # docker build + push 
+    svcname=$(basename $dir)
+    image="$DOCKER_REPO/$svcname:$TAG"
+    echo "Building and pushing $image..." 
+    docker build -t $image -f $dir/Dockerfile $dir 
+    docker push $image 
+
+    # inject new tag into the relevant k8s manifest
+    pattern=".*image:.*"
+    replace="        image: $image"
+    manifestfile="./release/kubernetes-manifests/$svcname.yaml"
+    sed -i '' "s|$pattern|$replace|g" $manifestfile 
+done
+ 
+
+# create + push new release tag 
+echo "Pushing git tag..."
+git tag $TAG 
+git push --tags
+
+# push updated manifests 
+echo "Commiting to $BRANCH..."
+git add .
+git commit -m "Tagged release $TAG"
+git push origin $BRANCH
+
+echo "✅ Successfully tagged release $TAG"

release/kubernetes-manifests/adservice.yaml

@@ -0,0 +1,65 @@
+# Copyright 2018 Google LLC
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+apiVersion: extensions/v1beta1
+kind: Deployment
+metadata:
+  name: adservice
+spec:
+  template:
+    metadata:
+      labels:
+        app: adservice
+    spec:
+      terminationGracePeriodSeconds: 5
+      containers:
+      - name: server
+        image: adservice
+        ports:
+        - containerPort: 9555
+        env:
+        - name: PORT
+          value: "9555"
+        #- name: JAEGER_SERVICE_ADDR
+        #  value: "jaeger-collector:14268"
+        resources:
+          requests:
+            cpu: 200m
+            memory: 180Mi
+          limits:
+            cpu: 300m
+            memory: 300Mi
+        readinessProbe:
+          initialDelaySeconds: 20
+          periodSeconds: 15
+          exec:
+            command: ["/bin/grpc_health_probe", "-addr=:9555"]
+        livenessProbe:
+          initialDelaySeconds: 20
+          periodSeconds: 15
+          exec:
+            command: ["/bin/grpc_health_probe", "-addr=:9555"]
+---
+apiVersion: v1
+kind: Service
+metadata:
+  name: adservice
+spec:
+  type: ClusterIP
+  selector:
+    app: adservice
+  ports:
+  - name: grpc
+    port: 9555
+    targetPort: 9555

release/kubernetes-manifests/cartservice.yaml

@@ -0,0 +1,66 @@
+# Copyright 2018 Google LLC
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+apiVersion: extensions/v1beta1
+kind: Deployment
+metadata:
+  name: cartservice
+spec:
+  template:
+    metadata:
+      labels:
+        app: cartservice
+    spec:
+      terminationGracePeriodSeconds: 5
+      containers:
+      - name: server
+        image: cartservice
+        ports:
+        - containerPort: 7070
+        env:
+        - name: REDIS_ADDR
+          value: "redis-cart:6379"
+        - name: PORT
+          value: "7070"
+        - name: LISTEN_ADDR
+          value: "0.0.0.0"
+        resources:
+          requests:
+            cpu: 200m
+            memory: 64Mi
+          limits:
+            cpu: 300m
+            memory: 128Mi
+        readinessProbe:
+          initialDelaySeconds: 15
+          exec:
+            command: ["/bin/grpc_health_probe", "-addr=:7070"]
+        livenessProbe:
+          initialDelaySeconds: 15
+          periodSeconds: 10
+          exec:
+            command: ["/bin/grpc_health_probe", "-addr=:7070"]
+---
+apiVersion: v1
+kind: Service
+metadata:
+  name: cartservice
+spec:
+  type: ClusterIP
+  selector:
+    app: cartservice
+  ports:
+  - name: grpc
+    port: 7070
+    targetPort: 7070

release/kubernetes-manifests/checkoutservice.yaml

@@ -0,0 +1,70 @@
+# Copyright 2018 Google LLC
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+apiVersion: extensions/v1beta1
+kind: Deployment
+metadata:
+  name: checkoutservice
+spec:
+  template:
+    metadata:
+      labels:
+        app: checkoutservice
+    spec:
+      containers:
+      - name: server
+        image: checkoutservice
+        ports:
+        - containerPort: 5050
+        readinessProbe:
+          exec:
+            command: ["/bin/grpc_health_probe", "-addr=:5050"]
+        livenessProbe:
+          exec:
+            command: ["/bin/grpc_health_probe", "-addr=:5050"]
+        env:
+        - name: PRODUCT_CATALOG_SERVICE_ADDR
+          value: "productcatalogservice:3550"
+        - name: SHIPPING_SERVICE_ADDR
+          value: "shippingservice:50051"
+        - name: PAYMENT_SERVICE_ADDR
+          value: "paymentservice:50051"
+        - name: EMAIL_SERVICE_ADDR
+          value: "emailservice:5000"
+        - name: CURRENCY_SERVICE_ADDR
+          value: "currencyservice:7000"
+        - name: CART_SERVICE_ADDR
+          value: "cartservice:7070"
+        # - name: JAEGER_SERVICE_ADDR
+        #   value: "jaeger-collector:14268"
+        resources:
+          requests:
+            cpu: 100m
+            memory: 64Mi
+          limits:
+            cpu: 200m
+            memory: 128Mi
+---
+apiVersion: v1
+kind: Service
+metadata:
+  name: checkoutservice
+spec:
+  type: ClusterIP
+  selector:
+    app: checkoutservice
+  ports:
+  - name: grpc
+    port: 5050
+    targetPort: 5050

release/kubernetes-manifests/currencyservice.yaml

@@ -0,0 +1,57 @@
+# Copyright 2018 Google LLC
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+apiVersion: extensions/v1beta1
+kind: Deployment
+metadata:
+  name: currencyservice
+spec:
+  template:
+    metadata:
+      labels:
+        app: currencyservice
+    spec:
+      terminationGracePeriodSeconds: 5
+      containers:
+      - name: server
+        image: currencyservice
+        ports:
+        - name: grpc
+          containerPort: 7000
+        readinessProbe:
+          exec:
+            command: ["/bin/grpc_health_probe", "-addr=:7000"]
+        livenessProbe:
+          exec:
+            command: ["/bin/grpc_health_probe", "-addr=:7000"]
+        resources:
+          requests:
+            cpu: 100m
+            memory: 64Mi
+          limits:
+            cpu: 200m
+            memory: 128Mi
+---
+apiVersion: v1
+kind: Service
+metadata:
+  name: currencyservice
+spec:
+  type: ClusterIP
+  selector:
+    app: currencyservice
+  ports:
+  - name: grpc
+    port: 7000
+    targetPort: 7000

release/kubernetes-manifests/emailservice.yaml

@@ -0,0 +1,58 @@
+# Copyright 2018 Google LLC
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+apiVersion: extensions/v1beta1
+kind: Deployment
+metadata:
+  name: emailservice
+spec:
+  template:
+    metadata:
+      labels:
+        app: emailservice
+    spec:
+      terminationGracePeriodSeconds: 5
+      containers:
+      - name: server
+        image: emailservice
+        ports:
+        - containerPort: 8080
+        readinessProbe:
+          periodSeconds: 5
+          exec:
+            command: ["/bin/grpc_health_probe", "-addr=:8080"]
+        livenessProbe:
+          periodSeconds: 5
+          exec:
+            command: ["/bin/grpc_health_probe", "-addr=:8080"]
+        resources:
+          requests:
+            cpu: 100m
+            memory: 64Mi
+          limits:
+            cpu: 200m
+            memory: 128Mi
+---
+apiVersion: v1
+kind: Service
+metadata:
+  name: emailservice
+spec:
+  type: ClusterIP
+  selector:
+    app: emailservice
+  ports:
+  - name: grpc
+    port: 5000
+    targetPort: 8080

release/kubernetes-manifests/frontend.yaml

@@ -0,0 +1,95 @@
+# Copyright 2018 Google LLC
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+apiVersion: extensions/v1beta1
+kind: Deployment
+metadata:
+  name: frontend
+spec:
+  template:
+    metadata:
+      labels:
+        app: frontend
+    spec:
+      containers:
+      - name: server
+        image: frontend
+        ports:
+        - containerPort: 8080
+        readinessProbe:
+          initialDelaySeconds: 10
+          httpGet:
+            path: "/_healthz"
+            port: 8080
+            httpHeaders:
+            - name: "Cookie"
+              value: "shop_session-id=x-readiness-probe"
+        livenessProbe:
+          initialDelaySeconds: 10
+          httpGet:
+            path: "/_healthz"
+            port: 8080
+            httpHeaders:
+            - name: "Cookie"
+              value: "shop_session-id=x-liveness-probe"
+        env:
+        - name: PRODUCT_CATALOG_SERVICE_ADDR
+          value: "productcatalogservice:3550"
+        - name: CURRENCY_SERVICE_ADDR
+          value: "currencyservice:7000"
+        - name: CART_SERVICE_ADDR
+          value: "cartservice:7070"
+        - name: RECOMMENDATION_SERVICE_ADDR
+          value: "recommendationservice:8080"
+        - name: SHIPPING_SERVICE_ADDR
+          value: "shippingservice:50051"
+        - name: CHECKOUT_SERVICE_ADDR
+          value: "checkoutservice:5050"
+        - name: AD_SERVICE_ADDR
+          value: "adservice:9555"
+        # - name: JAEGER_SERVICE_ADDR
+        #   value: "jaeger-collector:14268"
+        resources:
+          requests:
+            cpu: 100m
+            memory: 64Mi
+          limits:
+            cpu: 200m
+            memory: 128Mi
+---
+apiVersion: v1
+kind: Service
+metadata:
+  name: frontend
+spec:
+  type: ClusterIP
+  selector:
+    app: frontend
+  ports:
+  - name: http
+    port: 80
+    targetPort: 8080
+---
+apiVersion: v1
+kind: Service
+metadata:
+  name: frontend-external
+spec:
+  type: LoadBalancer
+  selector:
+    app: frontend
+  ports:
+  - name: http
+    port: 80
+    targetPort: 8080

release/kubernetes-manifests/loadgenerator.yaml

@@ -0,0 +1,53 @@
+# Copyright 2018 Google LLC
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+apiVersion: extensions/v1beta1
+kind: Deployment
+metadata:
+  name: loadgenerator
+spec:
+  replicas: 1
+  template:
+    metadata:
+      labels:
+        app: loadgenerator
+    spec:
+      terminationGracePeriodSeconds: 5
+      restartPolicy: Always
+      initContainers:
+      - name: wait-frontend
+        image: loadgenerator
+        command: ['sh', '-c', 'set -x;  apk add --no-cache curl; 
+          until timeout -t 2 curl -f "http://${FRONTEND_ADDR}"; do 
+            echo "waiting for http://${FRONTEND_ADDR}"; 
+            sleep 2;
+          done;']
+        env:
+        - name: FRONTEND_ADDR
+          value: "frontend:80"
+      containers:
+      - name: main
+        image: loadgenerator
+        env:
+        - name: FRONTEND_ADDR
+          value: "frontend:80"
+        - name: USERS
+          value: "10"
+        resources:
+          requests:
+            cpu: 300m
+            memory: 256Mi
+          limits:
+            cpu: 500m
+            memory: 512Mi

release/kubernetes-manifests/paymentservice.yaml

@@ -0,0 +1,56 @@
+# Copyright 2018 Google LLC
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+apiVersion: extensions/v1beta1
+kind: Deployment
+metadata:
+  name: paymentservice
+spec:
+  template:
+    metadata:
+      labels:
+        app: paymentservice
+    spec:
+      terminationGracePeriodSeconds: 5
+      containers:
+      - name: server
+        image: paymentservice
+        ports:
+        - containerPort: 50051
+        readinessProbe:
+          exec:
+            command: ["/bin/grpc_health_probe", "-addr=:50051"]
+        livenessProbe:
+          exec:
+            command: ["/bin/grpc_health_probe", "-addr=:50051"]
+        resources:
+          requests:
+            cpu: 100m
+            memory: 64Mi
+          limits:
+            cpu: 200m
+            memory: 128Mi
+---
+apiVersion: v1
+kind: Service
+metadata:
+  name: paymentservice
+spec:
+  type: ClusterIP
+  selector:
+    app: paymentservice
+  ports:
+  - name: grpc
+    port: 50051
+    targetPort: 50051

release/kubernetes-manifests/productcatalogservice.yaml

@@ -0,0 +1,59 @@
+# Copyright 2018 Google LLC
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+apiVersion: extensions/v1beta1
+kind: Deployment
+metadata:
+  name: productcatalogservice
+spec:
+  template:
+    metadata:
+      labels:
+        app: productcatalogservice
+    spec:
+      terminationGracePeriodSeconds: 5
+      containers:
+      - name: server
+        image: productcatalogservice
+        ports:
+        - containerPort: 3550
+        readinessProbe:
+          exec:
+            command: ["/bin/grpc_health_probe", "-addr=:3550"]
+        livenessProbe:
+          exec:
+            command: ["/bin/grpc_health_probe", "-addr=:3550"]
+#        env:
+#          - name: JAEGER_SERVICE_ADDR
+#            value: "jaeger-collector:14268"
+        resources:
+          requests:
+            cpu: 100m
+            memory: 64Mi
+          limits:
+            cpu: 200m
+            memory: 128Mi
+---
+apiVersion: v1
+kind: Service
+metadata:
+  name: productcatalogservice
+spec:
+  type: ClusterIP
+  selector:
+    app: productcatalogservice
+  ports:
+  - name: grpc
+    port: 3550
+    targetPort: 3550

release/kubernetes-manifests/recommendationservice.yaml

@@ -0,0 +1,61 @@
+# Copyright 2018 Google LLC
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+apiVersion: extensions/v1beta1
+kind: Deployment
+metadata:
+  name: recommendationservice
+spec:
+  template:
+    metadata:
+      labels:
+        app: recommendationservice
+    spec:
+      terminationGracePeriodSeconds: 5
+      containers:
+      - name: server
+        image: recommendationservice
+        ports:
+        - containerPort: 8080
+        readinessProbe:
+          periodSeconds: 5
+          exec:
+            command: ["/bin/grpc_health_probe", "-addr=:8080"]
+        livenessProbe:
+          periodSeconds: 5
+          exec:
+            command: ["/bin/grpc_health_probe", "-addr=:8080"]
+        env:
+        - name: PRODUCT_CATALOG_SERVICE_ADDR
+          value: "productcatalogservice:3550"
+        resources:
+          requests:
+            cpu: 100m
+            memory: 220Mi
+          limits:
+            cpu: 200m
+            memory: 450Mi
+---
+apiVersion: v1
+kind: Service
+metadata:
+  name: recommendationservice
+spec:
+  type: ClusterIP
+  selector:
+    app: recommendationservice
+  ports:
+  - name: grpc
+    port: 8080
+    targetPort: 8080

release/kubernetes-manifests/redis.yaml

@@ -0,0 +1,63 @@
+# Copyright 2018 Google LLC
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+apiVersion: extensions/v1beta1
+kind: Deployment
+metadata:
+  name: redis-cart
+spec:
+  template:
+    metadata:
+      labels:
+        app: redis-cart
+    spec:
+      containers:
+      - name: redis
+        image: redis:alpine
+        ports:
+        - containerPort: 6379
+        readinessProbe:
+          periodSeconds: 5
+          tcpSocket:
+            port: 6379
+        livenessProbe:
+          periodSeconds: 5
+          tcpSocket:
+            port: 6379
+        volumeMounts:
+        - mountPath: /data
+          name: redis-data
+        resources:
+          limits:
+            memory: 256Mi
+            cpu: 125m
+          requests:
+            cpu: 70m
+            memory: 200Mi
+      volumes:
+      - name: redis-data
+        emptyDir: {}
+---
+apiVersion: v1
+kind: Service
+metadata:
+  name: redis-cart
+spec:
+  type: ClusterIP
+  selector:
+    app: redis-cart
+  ports:
+  - name: redis
+    port: 6379
+    targetPort: 6379

release/kubernetes-manifests/shippingservice.yaml

@@ -0,0 +1,59 @@
+# Copyright 2018 Google LLC
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+apiVersion: extensions/v1beta1
+kind: Deployment
+metadata:
+  name: shippingservice
+spec:
+  template:
+    metadata:
+      labels:
+        app: shippingservice
+    spec:
+      containers:
+      - name: server
+        image: shippingservice
+        ports:
+        - containerPort: 50051
+        readinessProbe:
+          periodSeconds: 5
+          exec:
+            command: ["/bin/grpc_health_probe", "-addr=:50051"]
+        livenessProbe:
+          exec:
+            command: ["/bin/grpc_health_probe", "-addr=:50051"]
+#        env:
+#          - name: JAEGER_SERVICE_ADDR
+#            value: "jaeger-collector:14268"
+        resources:
+          requests:
+            cpu: 100m
+            memory: 64Mi
+          limits:
+            cpu: 200m
+            memory: 128Mi
+---
+apiVersion: v1
+kind: Service
+metadata:
+  name: shippingservice
+spec:
+  type: ClusterIP
+  selector:
+    app: shippingservice
+  ports:
+  - name: grpc
+    port: 50051
+    targetPort: 50051