Background
To achieve this we will use a couple of open source projects to help enable automated DNS for your applications.
For this guide we are going to assume you own a domain called foo.io which is managed by Google Cloud DNS, if it is not see configure cloud dns to manage a domain. A similar procedure is described for an external registrar, see the Azure section.
A common requirement for domains is to have production services accessed using a parent / apex domain for example:
Many organisations have extra requirements for development and test multi cluster environments to access services at
https://dev.foo.com and https://staging.foo.com
These use subdomains.
In this guide below there is a prerequisite that you must already have a domain which is managed by your cloud provider, this is so that you can choose whichever of the scenarios above you need. It also means the dns management of the apex domain happens outside of a single cluster installation and can be shared by multiple installations using a subdomain.
Jenkins X services will have URLs like https://hook-jx.dev.foo.io. The jx-requirements.yml namespaceSubDomain: of -jx which is in the cluster git repository refers to the Kubernetes namespace the service is running in, this avoids clashes of the same application running in different namespaces in the same cluster.
To start with we are focussed on GCP and Azure but will expand to other cloud providers.
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