added initial draft of the Docker infrastructure doc

hack/infrastructure/overview.md

@@ -0,0 +1,103 @@
+# Docker Server Overview
+This is an overview of the Docker infrastructure
+
+## Docker Git Repo
+The Docker source code lives on github.com under the dotCloud account.
+https://github.com/dotcloud/docker
+
+## DNS
+We are using dyn.com for our DNS server for the docker.io domain. 
+It is using the dotCloud account.
+
+### DNS Redirect
+We have a DNS redirect in dyn.com that will automatically redirect 
+docker.io to www.docker.io
+
+## email
+Email is sent via  dotCloud account on MailGun.com
+
+## CDN
+We are using a CDN in front of some of the docker.io domains to help improve
+proformance. The CDN is Cloudflare, using a Pro account. 
+
+*This is currently disabled due to an issue with slow performance during pull
+in some regions of the world.*
+
+### CDN Domains
+- www.docker.io
+- test.docker.io
+- registry-1.docker.io
+- debug.docker.io
+- cdn-registry-1.docker.io
+
+## edge-docker.dotcloud.com
+All of the Docker applications that live on dotCloud go through their own
+load balancer, and this is where SSL is terminated as well.
+
+## www.docker.io
+This is hosted under the docker account on dotCloud's PaaS. 
+
+### Source Code
+The source code for the website lives here:
+https://github.com/dotcloud/www.docker.io
+
+## Docker Registry
+The registry is where the image data is store.
+
+### URL:
+- registry-1.docker.io
+- cdn-registry-1.docker.io
+
+There are two urls, one is behind a CDN the other isn't this is because when
+you pull, you pull from the CDN url, to help with pull speeds. We don't push
+through the CDN as well, because it doesn't help us, so we bypass it.
+
+### Data Store:
+The data store for the registry is using Amazon S3 in a bucket under the docker
+aws account.
+
+### Source Code
+The source code for the registry lives here: https://github.com/dotcloud/docker-registry
+
+### Hosted:
+Hosted on the Docker account on dotCloud's PaaS
+
+## index.docker.io
+This is the docker index, it stores all of the meta information about the 
+docker images, but all data is stored in the registry.
+
+### Source Code:
+Not available
+
+### Hosted:
+Hosted on the Docker account on dotCloud's PaaS
+
+## blog.docker.io
+This is a wordpress based Docker blog.
+
+### URL:
+http://blog.docker.io
+
+### Source Code:
+https://github.com/dotcloud/blog.docker.io
+
+## docs.docker.io
+This is where all of the documentation for docker lives.
+
+### Hosted:
+This website is hosted on ReadTheDocs.org.
+
+### Updates
+These docs get automatically updated when the Docker repo on github has
+new commits. It does this via a webhook.
+
+### Proxy:
+This is a simple dotcloud app, with its main and only purpose to forward
+http (and https) requests to docker.readthedocs.org.
+
+https://github.com/dotcloud/docker-docs-dotcloud-proxy
+
+## get.docker.io
+This is the docker repository where we store images
+
+TODO: need more here. jerome?