├── .github └── ISSUE_TEMPLATE │ └── bug_report.md ├── Dockerfile ├── test_app.py ├── app.py ├── CONTRIBUTING.md ├── kubernetes.yaml.tpl ├── cloudbuild.yaml ├── README.md ├── cloudbuild-delivery.yaml ├── cloudbuild-trigger-cd.yaml └── LICENSE /.github/ISSUE_TEMPLATE/bug_report.md: -------------------------------------------------------------------------------- 1 | --- 2 | name: Bug report 3 | about: Create a report to help us improve 4 | title: '' 5 | labels: '' 6 | assignees: '' 7 | 8 | --- 9 | 10 | **If you have a problem with the "CI/CD for Google Kubernetes Engine using Cloud Build" lab, please give feedback on the lab itself instead of here.** 11 | 12 | **Describe the bug** 13 | A clear and concise description of what the bug is. 14 | 15 | **To Reproduce** 16 | Steps to reproduce the behavior: 17 | 1. Go to '...' 18 | 2. Click on '....' 19 | 3. Scroll down to '....' 20 | 4. See error 21 | 22 | **Expected behavior** 23 | A clear and concise description of what you expected to happen. 24 | 25 | **Screenshots** 26 | If applicable, add screenshots to help explain your problem. 27 | -------------------------------------------------------------------------------- /Dockerfile: -------------------------------------------------------------------------------- 1 | # Copyright 2018 Google LLC 2 | # 3 | # Licensed under the Apache License, Version 2.0 (the "License"); 4 | # you may not use this file except in compliance with the License. 5 | # You may obtain a copy of the License at 6 | # 7 | # https://www.apache.org/licenses/LICENSE-2.0 8 | # 9 | # Unless required by applicable law or agreed to in writing, software 10 | # distributed under the License is distributed on an "AS IS" BASIS, 11 | # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 12 | # See the License for the specific language governing permissions and 13 | # limitations under the License. 14 | 15 | # [START dockerfile] 16 | FROM python:3.7-slim 17 | RUN pip install flask 18 | WORKDIR /app 19 | COPY app.py /app/app.py 20 | ENTRYPOINT ["python"] 21 | CMD ["/app/app.py"] 22 | # [END dockerfile] 23 | -------------------------------------------------------------------------------- /test_app.py: -------------------------------------------------------------------------------- 1 | # Copyright 2018 Google LLC 2 | # 3 | # Licensed under the Apache License, Version 2.0 (the "License"); 4 | # you may not use this file except in compliance with the License. 5 | # You may obtain a copy of the License at 6 | # 7 | # https://www.apache.org/licenses/LICENSE-2.0 8 | # 9 | # Unless required by applicable law or agreed to in writing, software 10 | # distributed under the License is distributed on an "AS IS" BASIS, 11 | # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 12 | # See the License for the specific language governing permissions and 13 | # limitations under the License. 14 | 15 | import unittest 16 | from app import hello 17 | 18 | class TestHelloApp(unittest.TestCase): 19 | 20 | def test_hello(self): 21 | self.assertEqual(hello(), "Hello World!\n") 22 | 23 | if __name__ == '__main__': 24 | unittest.main() 25 | -------------------------------------------------------------------------------- /app.py: -------------------------------------------------------------------------------- 1 | # Copyright 2018 Google LLC 2 | # 3 | # Licensed under the Apache License, Version 2.0 (the "License"); 4 | # you may not use this file except in compliance with the License. 5 | # You may obtain a copy of the License at 6 | # 7 | # https://www.apache.org/licenses/LICENSE-2.0 8 | # 9 | # Unless required by applicable law or agreed to in writing, software 10 | # distributed under the License is distributed on an "AS IS" BASIS, 11 | # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 12 | # See the License for the specific language governing permissions and 13 | # limitations under the License. 14 | 15 | # [START hello-app] 16 | from flask import Flask 17 | app = Flask('hello-cloudbuild') 18 | 19 | @app.route('/') 20 | def hello(): 21 | return "Hello World!\n" 22 | 23 | if __name__ == '__main__': 24 | app.run(host = '0.0.0.0', port = 8080) 25 | # [END hello-app] 26 | -------------------------------------------------------------------------------- /CONTRIBUTING.md: -------------------------------------------------------------------------------- 1 | # How to Contribute 2 | 3 | We'd love to accept your patches and contributions to this project. There are 4 | just a few small guidelines you need to follow. 5 | 6 | ## Contributor License Agreement 7 | 8 | Contributions to this project must be accompanied by a Contributor License 9 | Agreement. You (or your employer) retain the copyright to your contribution; 10 | this simply gives us permission to use and redistribute your contributions as 11 | part of the project. Head over to to see 12 | your current agreements on file or to sign a new one. 13 | 14 | You generally only need to submit a CLA once, so if you've already submitted one 15 | (even if it was for a different project), you probably don't need to do it 16 | again. 17 | 18 | ## Code reviews 19 | 20 | All submissions, including submissions by project members, require review. We 21 | use GitHub pull requests for this purpose. Consult 22 | [GitHub Help](https://help.github.com/articles/about-pull-requests/) for more 23 | information on using pull requests. 24 | 25 | ## Community Guidelines 26 | 27 | This project follows 28 | [Google's Open Source Community 29 | Guidelines](https://opensource.google.com/conduct/). 30 | -------------------------------------------------------------------------------- /kubernetes.yaml.tpl: -------------------------------------------------------------------------------- 1 | # Copyright 2018 Google LLC 2 | # 3 | # Licensed under the Apache License, Version 2.0 (the "License"); 4 | # you may not use this file except in compliance with the License. 5 | # You may obtain a copy of the License at 6 | # 7 | # https://www.apache.org/licenses/LICENSE-2.0 8 | # 9 | # Unless required by applicable law or agreed to in writing, software 10 | # distributed under the License is distributed on an "AS IS" BASIS, 11 | # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 12 | # See the License for the specific language governing permissions and 13 | # limitations under the License. 14 | 15 | apiVersion: apps/v1 16 | kind: Deployment 17 | metadata: 18 | name: hello-cloudbuild 19 | labels: 20 | app: hello-cloudbuild 21 | spec: 22 | replicas: 1 23 | selector: 24 | matchLabels: 25 | app: hello-cloudbuild 26 | template: 27 | metadata: 28 | labels: 29 | app: hello-cloudbuild 30 | spec: 31 | containers: 32 | - name: hello-cloudbuild 33 | image: us-central1-docker.pkg.dev/GOOGLE_CLOUD_PROJECT/my-repository/hello-cloudbuild:COMMIT_SHA 34 | ports: 35 | - containerPort: 8080 36 | --- 37 | kind: Service 38 | apiVersion: v1 39 | metadata: 40 | name: hello-cloudbuild 41 | spec: 42 | selector: 43 | app: hello-cloudbuild 44 | ports: 45 | - protocol: TCP 46 | port: 80 47 | targetPort: 8080 48 | type: LoadBalancer 49 | -------------------------------------------------------------------------------- /cloudbuild.yaml: -------------------------------------------------------------------------------- 1 | # Copyright 2018 Google LLC 2 | # 3 | # Licensed under the Apache License, Version 2.0 (the "License"); 4 | # you may not use this file except in compliance with the License. 5 | # You may obtain a copy of the License at 6 | # 7 | # https://www.apache.org/licenses/LICENSE-2.0 8 | # 9 | # Unless required by applicable law or agreed to in writing, software 10 | # distributed under the License is distributed on an "AS IS" BASIS, 11 | # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 12 | # See the License for the specific language governing permissions and 13 | # limitations under the License. 14 | 15 | # [START cloudbuild] 16 | steps: 17 | # This step runs the unit tests on the app 18 | - name: 'python:3.7-slim' 19 | id: Test 20 | entrypoint: /bin/sh 21 | args: 22 | - -c 23 | - 'pip install flask && python test_app.py -v' 24 | 25 | # This step builds the container image. 26 | - name: 'gcr.io/cloud-builders/docker' 27 | id: Build 28 | args: 29 | - 'build' 30 | - '-t' 31 | - 'us-central1-docker.pkg.dev/$PROJECT_ID/my-repository/hello-cloudbuild:$SHORT_SHA' 32 | - '.' 33 | 34 | # This step pushes the image to Artifact Registry 35 | # The PROJECT_ID and SHORT_SHA variables are automatically 36 | # replaced by Cloud Build. 37 | - name: 'gcr.io/cloud-builders/docker' 38 | id: Push 39 | args: 40 | - 'push' 41 | - 'us-central1-docker.pkg.dev/$PROJECT_ID/my-repository/hello-cloudbuild:$SHORT_SHA' 42 | # [END cloudbuild] 43 | -------------------------------------------------------------------------------- /README.md: -------------------------------------------------------------------------------- 1 | # GitOps-style Continuous Delivery For Kubernetes Engine With Cloud Build 2 | 3 | This repository contains the code used in the 4 | [GitOps-style Continuous Delivery with Cloud Build](https://cloud.google.com/kubernetes-engine/docs/tutorials/gitops-cloud-build) 5 | tutorial. 6 | 7 | GitOps is a Continuous Delivery approach [first described by Weaveworks](https://www.weave.works/blog/gitops-operations-by-pull-request) that is 8 | popular in the Kubernetes community. A key part of GitOps is the idea of 9 | "environments-as-code": describing your deployments declaratively by files (for 10 | example, Kubernetes manifests) stored in a Git repository. 11 | 12 | In this tutorial, you create a CI/CD pipeline that automatically builds a 13 | container image from commited code, stores the image in Google Artifact 14 | Registry, updates a Kubernetes manifest in a Git repository and triggers a 15 | deployment to Kubernetes Engine using that manifest. 16 | 17 | This tutorial uses two Git repositories: one for the application —the _app_ 18 | repository— and one for storing the deployment manifests —the _env_ repository. 19 | When a change is pushed to the application repository, tests are run, a 20 | container image is built and pushed to Artifact Registry. Once the image is 21 | pushed, the deployment manifests are updated to use that new image and they are 22 | pushed to the _candidate_ branch of the _env_ repository. This triggers the actual 23 | deployment in Kubernetes. Once the deployment is finished, the new manifests 24 | are copied over to the _production_ branch of the _env_ repository. 25 | 26 | In the end, you have a system where: 27 | * The _candidate_ branch is a history of the deployment attempts. 28 | * The _production_ branch is a history of the successful deployments. 29 | * You have a view of successful and failed deployments in Cloud Build. 30 | * You can rollback to any previous deployment by re-executing the corresponding 31 | job in Cloud Build. A rollback also updates the _production_ branch to 32 | truthfully reflect the history of deployments. 33 | -------------------------------------------------------------------------------- /cloudbuild-delivery.yaml: -------------------------------------------------------------------------------- 1 | # Copyright 2018 Google LLC 2 | # 3 | # Licensed under the Apache License, Version 2.0 (the "License"); 4 | # you may not use this file except in compliance with the License. 5 | # You may obtain a copy of the License at 6 | # 7 | # https://www.apache.org/licenses/LICENSE-2.0 8 | # 9 | # Unless required by applicable law or agreed to in writing, software 10 | # distributed under the License is distributed on an "AS IS" BASIS, 11 | # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 12 | # See the License for the specific language governing permissions and 13 | # limitations under the License. 14 | 15 | # [START cloudbuild-delivery] 16 | steps: 17 | # This step deploys the new version of our container image 18 | # in the hello-cloudbuild Kubernetes Engine cluster. 19 | - name: 'gcr.io/cloud-builders/kubectl' 20 | id: Deploy 21 | args: 22 | - 'apply' 23 | - '-f' 24 | - 'kubernetes.yaml' 25 | env: 26 | - 'CLOUDSDK_COMPUTE_REGION=us-central1' 27 | - 'CLOUDSDK_CONTAINER_CLUSTER=hello-cloudbuild' 28 | 29 | # This step copies the applied manifest to the production branch 30 | # The COMMIT_SHA variable is automatically 31 | # replaced by Cloud Build. 32 | - name: 'gcr.io/cloud-builders/git' 33 | id: Copy to production branch 34 | entrypoint: /bin/sh 35 | args: 36 | - '-c' 37 | - | 38 | set -x && \ 39 | # Configure Git to create commits with Cloud Build's service account 40 | git config user.email $(gcloud auth list --filter=status:ACTIVE --format='value(account)') && \ 41 | # Switch to the production branch and copy the kubernetes.yaml file from the candidate branch 42 | git fetch origin production && git checkout production && \ 43 | git checkout $COMMIT_SHA kubernetes.yaml && \ 44 | # Commit the kubernetes.yaml file with a descriptive commit message 45 | git commit -m "Manifest from commit $COMMIT_SHA 46 | $(git log --format=%B -n 1 $COMMIT_SHA)" && \ 47 | # Push the changes back to Cloud Source Repository 48 | git push origin production 49 | # [END cloudbuild-delivery] 50 | -------------------------------------------------------------------------------- /cloudbuild-trigger-cd.yaml: -------------------------------------------------------------------------------- 1 | # Copyright 2018 Google LLC 2 | # 3 | # Licensed under the Apache License, Version 2.0 (the "License"); 4 | # you may not use this file except in compliance with the License. 5 | # You may obtain a copy of the License at 6 | # 7 | # https://www.apache.org/licenses/LICENSE-2.0 8 | # 9 | # Unless required by applicable law or agreed to in writing, software 10 | # distributed under the License is distributed on an "AS IS" BASIS, 11 | # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 12 | # See the License for the specific language governing permissions and 13 | # limitations under the License. 14 | 15 | # [START cloudbuild] 16 | steps: 17 | # This step runs the unit tests on the app 18 | - name: 'python:3.7-slim' 19 | id: Test 20 | entrypoint: /bin/sh 21 | args: 22 | - -c 23 | - 'pip install flask && python test_app.py -v' 24 | 25 | # This step builds the container image. 26 | - name: 'gcr.io/cloud-builders/docker' 27 | id: Build 28 | args: 29 | - 'build' 30 | - '-t' 31 | - 'us-central1-docker.pkg.dev/$PROJECT_ID/my-repository/hello-cloudbuild:$SHORT_SHA' 32 | - '.' 33 | 34 | # This step pushes the image to Artifact Registry 35 | # The PROJECT_ID and SHORT_SHA variables are automatically 36 | # replaced by Cloud Build. 37 | - name: 'gcr.io/cloud-builders/docker' 38 | id: Push 39 | args: 40 | - 'push' 41 | - 'us-central1-docker.pkg.dev/$PROJECT_ID/my-repository/hello-cloudbuild:$SHORT_SHA' 42 | # [END cloudbuild] 43 | 44 | # [START cloudbuild-trigger-cd] 45 | # This step clones the hello-cloudbuild-env repository 46 | - name: 'gcr.io/cloud-builders/gcloud' 47 | id: Clone env repository 48 | entrypoint: /bin/sh 49 | args: 50 | - '-c' 51 | - | 52 | gcloud source repos clone hello-cloudbuild-env && \ 53 | cd hello-cloudbuild-env && \ 54 | git checkout candidate && \ 55 | git config user.email $(gcloud auth list --filter=status:ACTIVE --format='value(account)') 56 | 57 | # This step generates the new manifest 58 | - name: 'gcr.io/cloud-builders/gcloud' 59 | id: Generate manifest 60 | entrypoint: /bin/sh 61 | args: 62 | - '-c' 63 | - | 64 | sed "s/GOOGLE_CLOUD_PROJECT/${PROJECT_ID}/g" kubernetes.yaml.tpl | \ 65 | sed "s/COMMIT_SHA/${SHORT_SHA}/g" > hello-cloudbuild-env/kubernetes.yaml 66 | 67 | # This step pushes the manifest back to hello-cloudbuild-env 68 | - name: 'gcr.io/cloud-builders/gcloud' 69 | id: Push manifest 70 | entrypoint: /bin/sh 71 | args: 72 | - '-c' 73 | - | 74 | set -x && \ 75 | cd hello-cloudbuild-env && \ 76 | git add kubernetes.yaml && \ 77 | git commit -m "Deploying image us-central1-docker.pkg.dev/$PROJECT_ID/my-repository/hello-cloudbuild:${SHORT_SHA} 78 | Built from commit ${COMMIT_SHA} of repository hello-cloudbuild-app 79 | Author: $(git log --format='%an <%ae>' -n 1 HEAD)" && \ 80 | git push origin candidate 81 | 82 | # [END cloudbuild-trigger-cd] 83 | -------------------------------------------------------------------------------- /LICENSE: -------------------------------------------------------------------------------- 1 | Apache License 2 | Version 2.0, January 2004 3 | http://www.apache.org/licenses/ 4 | 5 | TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION 6 | 7 | 1. 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