Update the infrastructure section of the handbook - first iteration

https://about.gitlab.com/handbook/engineering/infrastructure/production-architecture/ needs a refresh. @andrewn has done a bit of work in https://gitlab.com/gitlab-com/infrastructure/issues/4675 which would serve as a great starting point to update the diagrams. I think we should probably keep the scaffolding and just do a big update to make it relevant for GCP.

cc @gl-infra @andrewn

• ## On this page
• ## Other Related Pages
• ## Current Architecture - needs an update
• ## Proposed Cloud Native Architecture - needs an update
• ### GitLab.com Production Environment - consolidate with current architecture
• ### High Level Components View - Borrow diagrams from the readiness review?
• ### Pods Definition - This can probably stay as-is but maybe could use an update?
• ### Database Architecture - Needs an update
• ### Monitoring Architecture - Needs an update
• ### Logging Architecture - Either reference or put link to the logging page
• ## Infrastructure "Services" and Their SLx's - I think we should remove this until we have a solid plan, cc @Andrew
• ## Host Naming Standards - Update for gcp
• ### Hostnames - Update for gcp
• ### Service Tiers - This is pretty much the same
• ### Environments - Needs update
• ### Locations - update for GCP
• ### TLD Zones needs update for internal and .gitlab.net addresses
• ### Examples- needs update
• ## Internal Networking Scheme - replace with pointer to terraform
• ### Production - remove
• ### Canary - remove
• ### Staging - remove
• ### GitLabGeoPrd - remove
• ### GitLabGeoStg - remove
• ### GitLabOps - remove
• ### Remote Access - Replace with pointer to howtos for bastion access
• ## Azure - remove
• ### Load Balancers - Remove, covered in high level diagrams
• ### Service Nodes - remove
• ## Digital Ocean - needs update
• ## AWS - needs update
• ## Google Cloud - remove as we are on gcp now
• ## Monitoring - keep, reference to monitoring section
• ## Technology at GitLab - more or less the same.