Add architecture docs on operating systems

docs/architecture/operating-systems.md

@@ -0,0 +1,81 @@
+# Operating Systems
+
+Typhoon supports [Container Linux](https://coreos.com/why/) and Fedora [Atomic](https://www.projectatomic.io/) 27. These two operating systems were chosen because they offer:
+
+* Minimalism and focus on clustered operation
+* Automated and atomic operating system upgrades
+* Declarative and immutable configuration
+* Optimization for containerized applications
+
+Together, they diversify Typhoon to support a range of container technologies.
+
+* Container Linux: Gentoo core, rkt-fly, docker
+* Fedora Atomic: RHEL core, rpm-ostree, system containers (i.e. runc), CRI-O
+
+## Kubernetes
+
+| Property          | Container Linux | Fedora Atomic |
+|-------------------|-----------------|---------------|
+| control plane     | self-hosted | self-hosted |
+| kubelet image     | upstream hyperkube | upstream hyperkube in system container |
+| controller images | upstream hyperkube | upstream hyperkube |
+| on-host etcd      | rkt-fly   | system container (runc) |
+| on-host kubelet   | rkt-fly   | system container (runc) |
+| host spec (bare-metal) | Container Linux Config | kickstart, cloud-init | 
+| host spec (cloud)      | Container Linux Config | cloud-init |
+| CNI plugins       | calico or flannel | calico or flannel |
+| container runtime | docker    | docker (CRIO soon) |
+| cgroup driver     | cgroupfs  | systemd  |
+| logging driver    | json-file | journald |
+| storage driver    | overlay2  | overlay2 |
+
+## Locations
+
+Typhoon standard locations.
+
+| Kubelet setting   | Host location                  |
+|-------------------|--------------------------------|
+| cni-conf-dir      | /etc/kubernetes/cni/net.d      |
+| pod-manifest-path | /etc/kubernetes/manifests      |
+| volume-plugin-dir | /var/lib/kubelet/volumeplugins |
+
+## Kubelet Mounts
+
+### Container Linux
+
+| Mount location    | Host location     | Options |
+|-------------------|-------------------|---------|
+| /etc/kubernetes   | /etc/kubernetes   | ro |
+| /etc/ssl/certs    | /etc/ssl/certs    | ro |
+| /usr/share/ca-certificates | /usr/share/ca-certificates | ro |
+| /var/lib/kubelet  | /var/lib/kubelet  | recursive |
+| /var/lib/docker   | /var/lib/docker   | |
+| /var/lib/cni      | /var/lib/cni      | |
+| /var/lib/calico   | /var/lib/calico   | |
+| /var/log          | /var/log          | |
+| /etc/os-release   | /usr/lib/os-release | ro |
+| /run              | /run |            |
+| /lib/modules      | /lib/modules | ro |
+| /etc/resolv.conf  | /etc/resolv.conf  | |
+| /opt/cni/bin      | /opt/cni/bin      | |
+
+
+### Fedora Atomic
+
+| Mount location     | Host location    | Options |
+|--------------------|------------------|---------|
+| /rootfs            | /                | ro |
+| /etc/kubernetes    | /etc/kubernetes  | ro |
+| /etc/ssl/certs     | /etc/ssl/certs   | ro |
+| /etc/pki/tls/certs | /usr/share/ca-certificates | ro |
+| /var/lib           | /var/lib         | |
+| /var/lib/kubelet   | /var/lib/kubelet | recursive |
+| /var/log           | /var/log         | ro |
+| /etc/os-release    | /etc/os-release  | ro |
+| /var/run/secrets   | /var/run/secrets | |
+| /run               | /run             | |
+| /lib/modules       | /lib/modules     | ro |
+| /etc/hosts         | /etc/hosts       | ro |
+| /etc/resolv.conf   | /etc/resolv.conf | ro |
+| /opt/cni/bin       | /opt/cni/bin     | |
+

docs/topics/faq.md

@@ -8,7 +8,7 @@ Formats rise and evolve. Typhoon may choose to adapt the format over time (with
 
 ## Operating Systems
 
-Typhoon supports Container Linux and Fedora Atomic 27. Both operating systems offer:
+Typhoon supports Container Linux and Fedora Atomic 27. These two operating systems were chosen because they offer:
 
 * Minimalism and focus on clustered operation
 * Automated and atomic operating system upgrades
@@ -17,10 +17,8 @@ Typhoon supports Container Linux and Fedora Atomic 27. Both operating systems of
 
 Together, they diversify Typhoon to support a range of container technologies.
 
-* Container Linux
+* Container Linux: Gentoo core, rkt-fly, docker
-  * Gentoo core, rkt-fly, docker
+* Fedora Atomic: RHEL core, rpm-ostree, system containers (i.e. runc), CRI-O
-* Fedora Atomic
-  * RHEL core, rpm-ostree, system containers (i.e. runc), CRI-O
 
 ## Get Help
 

mkdocs.yml

@@ -5,6 +5,8 @@ repo_name: 'poseidon/typhoon'
 repo_url: 'https://github.com/poseidon/typhoon'
 theme:
   name: 'material'
+  feature:
+    tabs: true
   palette:
     primary: 'blue'
     accent: 'pink'
@@ -42,7 +44,9 @@ markdown_extensions:
   - pymdownx.tilde
 pages:
   - Home: 'index.md'
-  - 'Concepts': 'concepts.md'
+  - 'Architecture':
+    - 'Concepts': 'concepts.md'
+    - 'Operating Systems': 'architecture/operating-systems.md'
   - 'Container Linux': 
     - 'AWS': 'cl/aws.md'
     - 'Bare-Metal': 'cl/bare-metal.md'
@@ -58,7 +62,7 @@ pages:
     - 'Hardware': 'topics/hardware.md'
     - 'Security': 'topics/security.md'
     - 'Performance': 'topics/performance.md'
-    - 'FAQ': 'faq.md'
+    - 'FAQ': 'topics/faq.md'
   - 'Advanced':
     - 'Overview': 'advanced/overview.md'
     - 'Customization': 'advanced/customization.md'