Compute

Virtual Private Cloud (VPC)

• Each VPC network is contained in a GCP project
• VPCs have global scope. They can have subnets in any GCP region worldwide
• Subnets can span the zone that make-up a region
• We can have resources in different zones in the same subnet
• We can dynamically increase the size of a subnet

Compute Engine

• Let’s us create and run virtual machine instances in the cloud
• When a machine is created, we can pick a machine type (determines memory and CPU)
• If there is no predefined type for our use-cases, we can make a custom VM
• VMs can have dedicated GPUs
• We can pick persistent disks for storage. We can chose standard or SSD storage types
• We can attach a local SSD for higher performance. Data is not persisted if the VM is terminated
• Preemptible VMs: they can be terminated by GCP if their resources is needed elsewhere. They are recommended for saving costs

VPC Capabilities

• VPCs have route tables for managing network connectivity routing
• VPCs have a global distributed firewall
• We can define firewall rules as metadata tags on the compute engine instances
• VPC Peering: connect VPCs between projects
• Cloud Load Balancing: fully distributed, software defined managed service for all the traffic. We don’t have to manage and scale them
• Cloud Load Balancers support HTTP, HTTPS, other TCP and SSL traffic and UDP traffic
• With Cloud Load Balancing a single unicast IP fronts the whole backend
• Load-balancing options:
  • Global HTTP(s): L7, can route different URLs to different backends
  • Global SSL Proxy: L4, can load-balance non-HTTPS SSL traffic supported on specific ports
  • Global TCP Proxy: L4 lb for non-SSL TCP traffic
  • Regional: load-balancing of any traffic (TCP, UDP) on specific ports
  • Regional Internal: load-balancing of traffic inside a VPC
• Cloud DNS: managed, highly available and scalable DNS service
• Cloud CDN (Content Delivery Network): we can use Google’s globally distributed edge caches to cache content close the users
• Cloud Router: allows for on-premises networks and Google VPCs to change routes over VPN using BGP
• Direct Peering: offers private connection between on-premises and Google for hybrid solutions
• Carrier Peering: hybrid connectivity through Google partners
• Dedicated Interconnect: we can connect N * 10G transport circuits for private cloud traffic to GCP. Offers 99.99 SLA