Add guideline to create interal ALB for private networking#1229
Add guideline to create interal ALB for private networking#1229
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WalkthroughThe changes introduce a new documentation guide for creating an internal Application Load Balancer (ALB) aimed at facilitating connections between Cloud Run services within a private VPC network. The guide includes detailed steps for setting up a VPC and subnet, configuring the internal ALB, and modifying network settings for Cloud Run services, ensuring proper ingress control and DNS configuration. Changes
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Actionable comments posted: 0
🧹 Outside diff range and nitpick comments (6)
docs/docs/developer/CreateInternalALBForBackend.mdx (6)
1-4: Add a description for better documentation discoverability.The description field is currently empty. Consider adding a brief description that includes key terms like "Cloud Run", "internal ALB", and "private networking" to improve searchability.
--- title: Create internal Application Load Balancer for internal connections in backend -description: '' +description: 'Step-by-step guide for setting up an internal Application Load Balancer (ALB) to enable secure communication between Cloud Run services within a private VPC network.' ---
8-9: Enhance the introduction with more context.The introduction could be more specific about the benefits of using internal ALB. Consider adding details about security benefits and use cases.
-This guide will walk you through setting up an internal ALB to connect Cloud Run services (backend to pusher) internally inside VPC network. +This guide will walk you through setting up an internal ALB to connect Cloud Run services (backend to pusher) internally inside the VPC network. Using internal ALB provides enhanced security by keeping traffic within your private network and enables efficient load balancing between your services.🧰 Tools
🪛 LanguageTool
[uncategorized] ~8-~8: You might be missing the article “the” here.
Context: ...s (backend to pusher) internally inside VPC network. ## Create new VPC and subnet ...(AI_EN_LECTOR_MISSING_DETERMINER_THE)
13-23: Add important context about IP range planning and proxy-only subnet requirements.The VPC and subnet configuration section should include:
- Guidelines for IP range planning
- Explanation of proxy-only subnet requirements
- Warning about IP range overlapping
Consider adding the following content before the VPC configuration:
### Important considerations before creating VPC: - Ensure the chosen IP ranges (172.16.16.0/20 and 172.16.32.0/20) don't overlap with other VPCs or on-premises networks - The proxy-only subnet is required for internal HTTP(S) load balancing and must be: - In the same region as your load balancer - Sized /28 or larger - Reserved exclusively for proxy-only subnet use
34-38: Add missing health check and SSL configuration details.The backend configuration section should include health check settings and SSL configuration options for secure communication.
Add the following configuration details:
- Health check configuration: - Protocol: HTTP - Port: 80 - Health criteria: Define appropriate timeout and retry parameters - SSL configuration (optional): - Certificate type: Google-managed or self-managed - SSL policy: Define minimum TLS version
58-60: Add environment variable format and verification steps.The HOSTED_PUSHER_API_URL format should be specified, and verification steps should be included.
Add the following content:
- Variable and servers: - HOSTED_PUSHER_API_URL: internal ALB DNS name Format: http://<ALB-DNS-NAME> ### Verification Steps 1. Verify connectivity between services: ```bash curl -v ${HOSTED_PUSHER_API_URL}/health
- Check Cloud Run logs for any connection errors
- Verify VPC firewall rules allow traffic on port 80/443
Troubleshooting
Common issues and solutions:
- 502 Bad Gateway: Check health check configuration
- Connection timeout: Verify VPC firewall rules
- DNS resolution issues: Ensure Private Google Access is enabled
--- `60-60`: **Add security considerations section.** The guide should include security best practices for internal ALB configuration. Add a new section at the end: ```markdown ### Security Considerations 1. IAM Configuration: - Set up appropriate service accounts for Cloud Run services - Configure minimum necessary IAM roles 2. Network Security: - Implement appropriate firewall rules - Consider using Cloud Armor policies 3. Authentication: - Configure internal authentication between services - Use workload identity for service-to-service authentication
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docs/docs/developer/CreateInternalALBForBackend.mdx(1 hunks)
🧰 Additional context used
🪛 LanguageTool
docs/docs/developer/CreateInternalALBForBackend.mdx
[uncategorized] ~8-~8: You might be missing the article “the” here.
Context: ...s (backend to pusher) internally inside VPC network. ## Create new VPC and subnet ...
(AI_EN_LECTOR_MISSING_DETERMINER_THE)
🔇 Additional comments (1)
docs/docs/developer/CreateInternalALBForBackend.mdx (1)
43-44: Document the implications of using a fixed IP address.
Using a fixed IP (172.16.16.250) requires careful planning to avoid IP conflicts. Consider documenting the implications or using an automatically assigned IP instead.
✅ Verification successful
Fixed IP address usage appears to be within subnet range and isolated
The IP address 172.16.16.250 is being used within the subnet 172.16.16.0/20, which is properly documented in the same file. Since this is the only occurrence of this IP pattern in the codebase and it falls within the defined subnet range, the fixed IP usage appears to be intentional and properly scoped to this internal ALB configuration.
- The IP (172.16.16.250) is within the documented subnet range (172.16.16.0/20)
- No other occurrences of this IP were found elsewhere in the codebase
- The configuration appears to be isolated to this specific internal ALB setup
🏁 Scripts executed
The following scripts were executed for the analysis:
Script:
#!/bin/bash
# Check if the IP address is referenced elsewhere in the codebase
rg "172.16.16.250" --type yaml --type md
Length of output: 40
Script:
#!/bin/bash
# Let's broaden the search to find any references to this IP or similar patterns
# across all file types to ensure we don't miss anything
rg "172\.16\.16\." -A 2 -B 2
# Also search for any IP address assignments in kubernetes or infrastructure files
fd -e yaml -e tf -e hcl . | xargs grep -l "ip.*address"
Length of output: 889
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Add guideline to create internal Application Load Balancer for connections between Cloud Run services in private networking
Summary by CodeRabbit
New Features
Documentation