It’s not DNS: Ensuring high availability in a hybrid cloud environment
Our customers have multi-faceted requirements around DNS forwarding, especially if they have multiple VPCs that connect to multiple on-prem locations. As we discussed in an earlier blog post, we recommend that customers utilize a hub-and-spoke model, which helps get around reverse routing challenges due to the usage of the Google DNS proxy range.
But in some configurations, this approach can introduce a single point of failure (SPOF) within the hub network, and if there are connectivity issues within your deployment, it could cause an outage in all your VPC networks. In this post, we’ll discuss some redundancy mechanisms you can employ to ensure that Cloud DNS is always available to handle your DNS requests.