CONTRIBUTING.md

+# How to Contribute
+
+We'd love to accept your patches and contributions to this project. There are
+just a few small guidelines you need to follow.
+
+## Development Principles (for Googlers)
+
+There are a few principles for developing or refactoring the service
+implementations. Read the [Development Principles
+Guide](./docs/development-principles.md).
+
+## Contributor License Agreement
+
+Contributions to this project must be accompanied by a Contributor License
+Agreement. You (or your employer) retain the copyright to your contribution;
+this simply gives us permission to use and redistribute your contributions as
+part of the project. Head over to <https://cla.developers.google.com/> to see
+your current agreements on file or to sign a new one.
+
+You generally only need to submit a CLA once, so if you've already submitted one
+(even if it was for a different project), you probably don't need to do it
+again.
+
+## Code reviews
+
+All submissions, including submissions by project members, require review. We
+use GitHub pull requests for this purpose. Consult
+[GitHub Help](https://help.github.com/articles/about-pull-requests/) for more
+information on using pull requests.
+
+## Community Guidelines
+
+This project follows [Google's Open Source Community
+Guidelines](https://opensource.google.com/conduct/).

LICENSE

+
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+
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+
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+   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.

cloudbuild.yaml

+# This configuration file is used to build and deploy the app into a 
+# GKE cluster using Google Cloud Build.
+#
+# PREREQUISITES:
+# - Cloud Build service account must have role: "Kubernetes Engine Developer"
+
+# USAGE:
+# GCP zone and GKE target cluster must be specified as substitutions
+# Example invocation:
+# `gcloud builds submit --config=cloudbuild.yaml --substitutions=_ZONE=us-central1-b,_CLUSTER=demo-app-staging .`
+
+steps:
+- id: 'Deploy application to cluster'
+  name: 'gcr.io/k8s-skaffold/skaffold:v0.20.0'
+  entrypoint: 'bash'
+  args: 
+  - '-c'
+  - > 
+    gcloud container clusters get-credentials --zone=$_ZONE $_CLUSTER;
+    skaffold run -f=skaffold.yaml --default-repo=gcr.io/$PROJECT_ID;
+
+# Add more power, and more time, for heavy Skaffold build
+timeout: '3600s'
+options:
+  machineType: 'N1_HIGHCPU_8'
\ No newline at end of file

docs/development-principles.md

+# Development Principles
+
+> **Note:** This document outlines guidances behind some development decisions
+> behind the Hipster Shop demo application.
+
+### Minimal configuration
+
+Running the demo locally or on GCP should require minimal to no
+configuration unless absolutely necessary to run critical parts of the demo.
+
+Configuration that takes multiple steps, especially such as creating service
+accounts should be avoided.
+
+### App must work well outside GCP
+
+Demo application should work reasonably well when it is not deployed to GCP
+services. The experience of running the application locally or on GCP should
+be close.
+
+For example:
+- OpenCensus prints the traces to stdout when it cannot connect to GCP.
+- Stackdriver Debugging tries connecting to GCP multiple times, eventually gives
+  up.
+
+### Running on GCP must not reduce functionality
+
+Running the demo on the GCP must not reduce/lose any of the capabilities
+developers have when running locally.
+
+For example: Logs should still be printed to stdout/stderr even though logs are
+uploaded to Stackdriver Logging when on GCP, so that developers can use "kubectl
+logs" to diagnose each container.
+
+### Microservice implementations should not be complex
+
+Each service should provide a minimal implementation and try to avoid
+unnecessary code and logic that's not executed.
+
+Keep in mind that any service implementation is a decent example of “a GRPC
+application that runs on Kubernetes”. Keeping the source code short and
+navigable will serve this purpose.
+
+It is okay to have intentional inefficiencies in the code as they help
+illustrate the capabilities of profiling and diagnostics offerings.

hack/README.md

+## `hack/` 
+
+This directory provides scripts for building and pushing Docker images, and tagging new demo
+releases. 
+
+### env variables 
+
+- `TAG` - git release tag / Docker tag. 
+- `REPO_PREFIX` - Docker repo prefix to push images. Format: `$user/$project`.  Resulting images will be of the
+  format `$user/$project/$svcname:$tag` (where `svcname` = `adservice`, `cartservice`,
+  etc.)
+
+### scripts 
+
+1. `./make-docker-images.sh`: builds and pushes images to the specified Docker repository.
+2. `./make-release-artifacts.sh`: generates a combined YAML file with image $TAG at: 
+   `./release/kubernetes-manifests/demo.yaml`. 
+3. `./make-release.sh`: runs scripts 1 and 2, then runs `git tag` / pushes updated manifests to master.

hack/license_header.txt

+# 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.

hack/make-docker-images.sh

+#!/usr/bin/env bash
+
+# Copyright 2019 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.
+
+# Builds and pushes docker image for each demo microservice.
+
+set -euo pipefail
+SCRIPTDIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )"
+
+log() { echo "$1" >&2; }
+
+TAG="${TAG:?TAG env variable must be specified}"
+REPO_PREFIX="${REPO_PREFIX:?REPO_PREFIX env variable must be specified}"
+
+while IFS= read -d $'\0' -r dir; do
+    # build image
+    svcname="$(basename "${dir}")"
+    image="${REPO_PREFIX}/$svcname:$TAG"
+    (
+        cd "${dir}"
+        log "Building: ${image}"
+        docker build -t "${image}" .
+
+        log "Pushing: ${image}"
+        docker push "${image}"
+    )
+done < <(find "${SCRIPTDIR}/../src" -mindepth 1 -maxdepth 1 -type d -print0)
+
+log "Successfully built and pushed all images."

hack/make-release-artifacts.sh

+#!/usr/bin/env bash
+
+# Copyright 2019 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.
+
+# This script compiles manifest files with the image tags and places them in
+# /release/...
+
+set -euo pipefail
+SCRIPTDIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )"
+[[ -n "${DEBUG:-}" ]] && set -x
+
+log() { echo "$1" >&2; }
+
+TAG="${TAG:?TAG env variable must be specified}"
+REPO_PREFIX="${REPO_PREFIX:?REPO_PREFIX env variable must be specified}"
+OUT_DIR="${OUT_DIR:-${SCRIPTDIR}/../release}"
+
+print_license_header() {
+    cat "${SCRIPTDIR}/license_header.txt"
+    echo
+}
+
+print_autogenerated_warning() {
+    cat<<EOF
+# ----------------------------------------------------------
+# WARNING: This file is autogenerated. Do not manually edit.
+# ----------------------------------------------------------
+
+EOF
+}
+
+# define gsed as a function on Linux for compatibility
+[ "$(uname -s)" == "Linux" ] && gsed() {
+    sed "$@"
+}
+
+read_manifests() {
+    local dir
+    dir="$1"
+
+    while IFS= read -d $'\0' -r file; do
+        # strip license headers (pattern "^# ")
+        awk '
+        /^[^# ]/ { found = 1 }
+        found { print }' "${file}"
+
+        echo "---"
+    done < <(find "${dir}" -name '*.yaml' -type f -print0)
+}
+
+mk_kubernetes_manifests() {
+    out_manifest="$(read_manifests "${SCRIPTDIR}/../kubernetes-manifests")"
+
+    # replace "image" repo, tag for each service
+    for dir in ./src/*/
+    do
+        svcname="$(basename "${dir}")"
+        image="$REPO_PREFIX/$svcname:$TAG"
+
+        pattern="^(\s*)image:\s.*$svcname(.*)(\s*)"
+        replace="\1image: $image\3"
+        out_manifest="$(gsed -r "s|$pattern|$replace|g" <(echo "${out_manifest}") )"
+    done
+
+    print_license_header
+    print_autogenerated_warning
+    echo "${out_manifest}"
+}
+
+mk_istio_manifests() {
+    print_license_header
+    print_autogenerated_warning
+    read_manifests "${SCRIPTDIR}/../istio-manifests"
+}
+
+main() {
+    mkdir -p "${OUT_DIR}"
+    local k8s_manifests_file istio_manifests_file
+
+    k8s_manifests_file="${OUT_DIR}/kubernetes-manifests.yaml"
+    mk_kubernetes_manifests > "${k8s_manifests_file}"
+    log "Written ${k8s_manifests_file}"
+
+    istio_manifests_file="${OUT_DIR}/istio-manifests.yaml"
+    mk_istio_manifests > "${istio_manifests_file}"
+    log "Written ${istio_manifests_file}"
+}
+
+main

hack/make-release.sh

+#!/usr/bin/env bash
+
+# Copyright 2019 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.
+
+# This script creates a new release by:
+# - 1. building/pushing images
+# - 2. injecting tags into YAML manifests
+# - 3. creating a new git tag
+# - 4. pushing the tag/commit to master.
+
+set -euo pipefail
+SCRIPTDIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )"
+[[ -n "${DEBUG:-}" ]] && set -x
+
+log() { echo "$1" >&2; }
+fail() { log "$1"; exit 1; }
+
+TAG="${TAG:?TAG env variable must be specified}"
+REPO_PREFIX="${REPO_PREFIX:?REPO_PREFIX env variable must be specified e.g. gcr.io\/google-samples\/microservices-demo}"
+
+if [[ "$TAG" != v* ]]; then
+    fail "\$TAG must start with 'v', e.g. v0.1.0 (got: $TAG)"
+fi
+
+# build and push images
+"${SCRIPTDIR}"/make-docker-images.sh
+
+# update yaml
+"${SCRIPTDIR}"/make-release-artifacts.sh
+
+# create git release / push to new branch
+git checkout -b "release/${TAG}"
+git add "${SCRIPTDIR}/../release/"
+git commit --allow-empty -m "Release $TAG"
+log "Pushing k8s manifests to release/${TAG}..."
+git tag "$TAG"
+git push --set-upstream origin "release/${TAG}"
+git push --tags
+
+log "Successfully tagged release $TAG."

istio-manifests/frontend-gateway.yaml

+# 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: networking.istio.io/v1alpha3
+kind: Gateway
+metadata:
+  name: frontend-gateway
+spec:
+  selector:
+    istio: ingressgateway # use Istio default gateway implementation
+  servers:
+  - port:
+      number: 80
+      name: http
+      protocol: HTTP
+    hosts:
+    - "*"
+---
+apiVersion: networking.istio.io/v1alpha3
+kind: VirtualService
+metadata:
+  name: frontend-ingress
+spec:
+  hosts:
+  - "*"
+  gateways:
+  - frontend-gateway
+  http:
+  - route:
+    - destination:
+        host: frontend
+        port:
+          number: 80

istio-manifests/frontend.yaml

+# 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: networking.istio.io/v1alpha3
+kind: VirtualService
+metadata:
+  name: frontend
+spec:
+  hosts:
+  - "frontend.default.svc.cluster.local"
+  http:
+  - route:
+    - destination:
+        host: frontend
+        port:
+          number: 80

istio-manifests/whitelist-egress-googleapis.yaml

+# 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: networking.istio.io/v1alpha3
+kind: ServiceEntry
+metadata:
+  name: whitelist-egress-googleapis
+spec:
+  hosts:
+  - "accounts.google.com" # Used to get token
+  - "*.googleapis.com"
+  ports:
+  - number: 80
+    protocol: HTTP
+    name: http
+  - number: 443
+    protocol: HTTPS
+    name: https
+---
+apiVersion: networking.istio.io/v1alpha3
+kind: ServiceEntry
+metadata:
+  name: whitelist-egress-google-metadata
+spec:
+  hosts:
+  - metadata.google.internal
+  addresses:
+  - 169.254.169.254 # GCE metadata server
+  ports:
+  - number: 80
+    name: http
+    protocol: HTTP
+  - number: 443
+    name: https
+    protocol: HTTPS

kubernetes-manifests/README.md

+# ./kubernetes-manifests
+
+:warning: Kubernetes manifests provided in this directory are not directly
+deployable to a cluster. They are meant to be used with `skaffold` command to
+insert the correct `image:` tags.
+
+Use the manifests in [/release](/release) directory which are configured with
+pre-built public images.

kubernetes-manifests/adservice.yaml

+# 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: apps/v1
+kind: Deployment
+metadata:
+  name: adservice
+spec:
+  selector:
+    matchLabels:
+      app: adservice
+  template:
+    metadata:
+      labels:
+        app: adservice
+    spec:
+      terminationGracePeriodSeconds: 5
+      containers:
+      - name: server
+        image: adservice
+        ports:
+        - containerPort: 9555
+        env:
+        - name: PORT
+          value: "9555"
+        # - name: DISABLE_STATS
+        #   value: "1"
+        # - name: DISABLE_TRACING
+        #   value: "1"
+        #- 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

kubernetes-manifests/cartservice.yaml

+# 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: apps/v1
+kind: Deployment
+metadata:
+  name: cartservice
+spec:
+  selector:
+    matchLabels:
+      app: cartservice
+  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", "-rpc-timeout=5s"]
+        livenessProbe:
+          initialDelaySeconds: 15
+          periodSeconds: 10
+          exec:
+            command: ["/bin/grpc_health_probe", "-addr=:7070", "-rpc-timeout=5s"]
+---
+apiVersion: v1
+kind: Service
+metadata:
+  name: cartservice
+spec:
+  type: ClusterIP
+  selector:
+    app: cartservice
+  ports:
+  - name: grpc
+    port: 7070
+    targetPort: 7070

kubernetes-manifests/checkoutservice.yaml

+# 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: apps/v1
+kind: Deployment
+metadata:
+  name: checkoutservice
+spec:
+  selector:
+    matchLabels:
+      app: checkoutservice
+  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: PORT
+            value: "5050"
+          - 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: DISABLE_STATS
+          #   value: "1"
+          # - name: DISABLE_TRACING
+          #   value: "1"
+          # - name: DISABLE_PROFILER
+          #   value: "1"
+          # - 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