Google Developer Console项目管理：查找并安全删除未使用项目

Got it, let's walk through this step by step—first we'll figure out which projects are actually unused, then go through safe deletion steps to avoid accidental issues.

1. Finding Unused Projects #

Here are practical, actionable ways to spot projects that aren't powering any of your apps:

• Check activity history: For each project, head to the Dashboard > Activity tab. Look for recent actions like API deployments, resource changes, or credential updates. If there’s no activity in 3+ months (or longer, depending on your typical workflow), it’s a strong candidate for deletion.
• Audit associated resources: Navigate to the project’s APIs & Services section to see if any APIs are enabled. Also check IAM & Admin for active service accounts, and Cloud Storage/Compute Engine for running resources. A project with no enabled APIs, no service accounts, and no cloud resources is almost certainly unused.
• Cross-reference with app credentials: List all API keys, OAuth 2.0 client IDs, and service account keys used in your apps. Match each credential to its parent project ID (you can find this in the Credentials section of each project). Any project not on this list isn’t being used by your apps.
• Use Resource Manager filters: Go to the Google Cloud Resource Manager, use the filter bar to search for projects with no recent activity. For example, use lastActivityTime:<2024-01-01 (replace with a date far enough back) to pull up projects that haven’t been touched in months.

2. Safely Deleting Confirmed Unused Projects #

Once you’ve locked in a project to remove, follow these steps to do it without breaking anything:

• Final double-check: Before deleting, confirm there are no hidden paid resources (like active VM instances or storage buckets with ongoing costs). If you’re on a team, send a quick check to make sure no one else is relying on this project.
• Disable the project first (optional but recommended): In the project settings, find the "Disable project" option. Let it sit disabled for 1-2 weeks. If you don’t get any error reports from your apps or teammates, you can be confident it’s safe to delete.
• Initiate deletion: Go back to the project settings, click "Delete project". You’ll need to confirm the project ID and acknowledge the 7-day recovery period—during this time, you can undo the deletion if you realize you made a mistake.
• Clean up residual resources (if needed): For projects with cloud resources like storage buckets, manually delete these first before deleting the project. While Google will eventually clean them up, doing this upfront avoids unexpected delays or leftover billing.

内容的提问来源于stack exchange，提问作者iappmaker