pr-previews.md

Configure preview environments

Do the following, then whenever there's a pull request against branch staging, Cloud Build will create a Cloud Run revision specific to that PR. NOTE: all preview deployments share a single Cloud SQL database.

Configure repo access for the build:

1. Make a GitHub personal access token

• Visit your Personal Access Tokens page, create a token with repo scope, and copy it.
• export GITHUB_TOKEN=<paste_your_token_here>

1. Enable Secret Manager and grant Cloud Build access

gcloud services enable secretmanager.googleapis.com
gcloud secrets create github_token --replication-policy automatic
echo -n "${GITHUB_TOKEN}" | gcloud secrets versions add github_token --data-file=-
gcloud secrets add-iam-policy-binding github_token --member serviceAccount:${GCB_SERVICE_ACCT} --role roles/secretmanager.secretAccessor

Run these commands:

gcloud sql databases create instapuller-preview --instance=instapuller --charset=utf8mb4

gcloud run deploy instapuller-preview --image=gcr.io/$PROJECT/instapuller --region=us-central1 --platform=managed --allow-unauthenticated --set-env-vars=DB_USER=root,DB_PASS=${PASSWORD},DB_NAME=instapuller-preview,CLOUD_SQL_CONNECTION_NAME=$PROJECT:us-central1:instapuller --set-cloudsql-instances=$PROJECT:us-central1:instapuller

gcloud beta builds triggers create github \
   --repo-name=instapuller \
   --repo-owner=${GITHUB_USER} \
   --pull-request-pattern="^staging$" \
   --build-config="preview.cloudbuild.yaml" \
   --description="For each PR against staging, deploy a preview environment" \
   --substitutions="_GH_USERNAME=${GITHUB_USER}"