There are suboptimal configurations that are valid and allowed, but are not cost-effective and do not follow best practices.
Some common examples of suboptimal configurations are as follows:
- Single-zone deployments
- Single VPN tunnel without redundancy
- Single third-party VM as routing or NAT endpoint in the path
- Load balancer with a single backend
- External IP address is reserved but not allocated to a resource
- IP address utilization of a subnet is high (this can prevent automatically creating VMs or upgrading GKE clusters)
Scenario: High IP address utilization of a subnet
In this example, an insight from the IP utilization insights category of high IP address utilization of a subnet type is generated.
The insight details page shows that the primary range of the subnet has an IP allocation value of 100%, which is higher than the threshold value of 75%. This page also provides a list of resources that are allocated IP addresses from this subnet. For example:
- 1 forwarding rule
- 2 reserved static internal IP addresses
- 1 instance