airshipctl/docs/source/architecture.md
Drew Walters 771536304a Update stale README and reformat docs
This change updates the stale README and makes it the landing page of
our new documentation. This change also makes several formatting changes
to make our documentation fit the new docs.airshipit.org framework.

Lastly, some items from the original README have been updated for
accuracy and moved to a separate page of the documentation.

Change-Id: Iae898b36034640df4d35a430eb28fbda028f10dd
Signed-off-by: Drew Walters <andrew.walters@att.com>
2020-05-11 15:49:32 +00:00

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2.2 KiB
Markdown

## Architecture
The `airshipctl` tool is designed to work against declarative infrastructure
housed in source control and manage the lifecycle of a site.
![architecture diagram](img/architecture.png)
## Example Usage
In a nutshell, users of `airshipctl` should be able to do the following:
1. Create an `airshipctl` Airship Configuration for their site - sort of like a
kubeconfig file. Airshipctl can create a pre-configured config file by
running `airshipctl config init`.
2. Create a set of declarative documents representing the infrastructure
(baremetal, cloud) and software.
3. Run `airshipctl document pull` to clone the document repositories in your
Airship Configuration.
4. When deploying against baremetal infrastructure, run
`airshipctl baremetal isogen` to generate a self-contained ISO that can be
used to boot the first host in the cluster into an ephemeral Kubernetes node.
5. When deploying against baremetal infrastructure, run
`airshipctl baremetal remotedirect` to remotely provision the first machine
in the cluster using the generated ISO, providing an ephemeral Kubernetes
instance that `airshipctl` can communicate with for subsequent steps. This
ephemeral host provides a foothold in the target environment so we can follow
the standard cluster-api bootstrap flow.
6. Run `airshipctl phase apply initinfra` to bootstrap the new ephemeral cluster
with enough of the chosen cluster-api provider components to provision the
target cluster.
7. Run `airshipctl clusterctl` to use the ephemeral Kubernetes host to provision
at least one node of the target cluster using the cluster-api bootstrap flow.
8. Run `airshipctl cluster initinfra --clustertype=target` to bootstrap the new
target cluster with any remaining infrastructure necessary to begin running
more complex workflows such as Argo.
9. Run `airshipctl workflow submit sitemanage` to run the out of the box sitemanage
workflow, which will leverage Argo to handle bootstrapping the remaining
infrastructure as well as deploying and/or updating software.
As users evolve their sites declaration, whether adding additional
infrastructure, or software declarations, they can re-run `airshipctl workflow
submit sitemanage` to introduce those changes to the site.