Networking in the Cloud: DNS, Load Balancing, and IP Addressing

This Chapter continues the focus on networking, specifically configuring the Domain Name System (DNS), load balancing, and managing IP addresses. Cloud DNS is a managed service providing authoritative domain naming services. It is designed for high availability, low latency, and scalability. Load balancing services in Google Cloud Platform (GCP) offer five types of load balancers to address a range of needs. In this chapter, you will see how HTTP(S), SSL Proxy, TCP Proxy, Network TCP/UDP, and Internal TCP/ UDP Network differ and when to use each. Cloud engineers should also be familiar with managing IP addresses, in particular managing Classless Inter‐Domain Routing (CIDR) blocks and understanding how to reserve IP addresses. Cloud DNS is a Google service that provides domain name resolution. At the most basic level, DNS services map domain names, such as example.com, to IP addresses, such as 35.20.24.107. A managed zone contains DNS records associated with a DNS name suffix, such as aceexamdns1.com. DNS records contain specific details about a zone.