Google Cloud Build - Overview and Examples

Overview and Examples
Evgenii Studitskikh
Full Stack developer at Rounds

What is Cloud Build?
Cloud Build is Google Cloud Platform's fully managed CI/CD platform that allows
you to build, test, and deploy applications across multiple environments and
programming languages.

Key Features
● Execute builds in a fully managed environment
● Support of Docker containers
● YAML-based build configuration files (cloudbuild.yaml)
● Direct integration with Google Cloud Storage
● Cloud Logging and Monitoring integration

What’s Under the Hood?
● Docker Containers: Each build step runs inside an isolated container.
● Kubernetes Engine: The build infrastructure scales dynamically based on
its workload.
● Cloud Storage: It stores artifacts and logs for easy retrieval and auditing.
● IAM & Security: Access control with Identity and Access Management
(IAM).
● Cloud Pub/Sub: Used for event-driven build triggers and notifications.
● Cloud Logging & Monitoring: Provides real-time log streaming and
observability for debugging and performance analysis.

How to run the build?
● Automatically via GitHub, Bitbucket, etc.
● Manually through CLI or code.

Build triggers
● Name, Region, Description, Tags
● Event (repository event that invokes trigger)
○ Push to a repo branch, new tag, pull request
○ Manual invocation
○ Pub/Sub message
○ Webhook event
● Configuration
○ File (yaml or json)
○ Dockerfile, Buildpacks (only for repositories)
● Substitution variables
● Service account

How to configure the cloudbuild.yaml

Cloudbuild.yaml
steps:
- name: gcr.io/cloud-builders/gsutil
args:
- cp
- $_KEYSTORE_URL
- /workspace/keystore.jks
id: download-keystore
- name: ubuntu
args:
- '-c'
- |
apt-get update && apt-get install -y unzip
unzip file.zip
# Get the most recently created folder from workspace
folder_name=$(ls -dt */ 2>/dev/null | head -n 1 | xargs basename)
mv $folder_name android_app
id: unzip-source-code
entrypoint: sh
timeout: 3600s
logsBucket: 'gs://build-logs/$BUILD_ID'
artifacts:
objects:
location: 'gs://build-artifacts/$BUILD_ID'
paths:
- /workspace/android_app/app/build/outputs/apk/release/**
- /workspace/android_app/app/build/outputs/bundle/release/**
Explanation:
# (name) Defines the container image to be used for that step (More builders: gcr.io/cloud-builders)
# Copies a file from a given URL
# ($)Environment variable storing the URL of the keystore file
# Destination path inside the build workspace (root dir)
# Step identifier
# Executes a multi-line command in the shell
# Uses the shell as the entrypoint
# Sets a timeout limit for the build process
# Stores logs in a Cloud Storage bucket
# Specifies where build artifacts are stored
# Uploads release APK files
# Uploads release bundle files

Build logs
● Cloud Build provides real-time logging of each step execution.
● Logs are streamed to Cloud Logging and can be viewed in the GCP Console.
● Errors and warnings are highlighted to help with debugging.
● Logs are stored in a specified Cloud Storage bucket (logsBucket parameter).

Integration with Node.js
Installing the client library:
npm install @google-cloud/cloudbuild
Using the client library:
const {CloudBuildClient} = require('@google-cloud/cloudbuild');
const [resp] = await cb.runBuildTrigger({
projectId,
triggerId,
source: {
projectId,
dir: './',
branchName,
},
});

Google Cloud Build - Overview and Examples

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