70 lines
3.2 KiB
Markdown
70 lines
3.2 KiB
Markdown
|
---
|
||
|
|
status: draft
|
||
|
|
---
|
||
|
|
|
||
|
|
|
||
|
|
# NixOps4-based Installation Process
|
||
|
|
|
||
|
|
This documents explains how NixOps4 could be leveraged to provide a smooth installation experience for a simple, monolithic deployment.
|
||
|
|
|
||
|
|
It does not go into detail about the way Nix Panel hooks into this, or whether Nix Panel manages the same NixOps4 deployment that also contains the infrastructure; a single NixOps4 deployment could provide a nice simplification in the early stages of the project.
|
||
|
|
|
||
|
|
## Components
|
||
|
|
|
||
|
|
Required for the setup steps in this document:
|
||
|
|
|
||
|
|
- `nixops4`: generic deployment tool using Nix
|
||
|
|
- `landscaper.iso`: installation image that bootstraps a completely new and independent Fedi cluster - a NixOS installer with a handful of extra definitions (@roberth: easy)
|
||
|
|
- `nixops4-modules-ssh-keypair`: NixOps4 resource provider that generates keys
|
||
|
|
- `nixops4-pxe-nbp`: NixOps4 resource provider that inserts an NBP image into a (local) PXE server configuration
|
||
|
|
- `nixops4-modules-ssh`: A module that calls `ssh` using `nixops4-resources-local`
|
||
|
|
- `nixops4-resources-local`: A module that can create files and call commands locally (prototyped)
|
||
|
|
- `nixops4-modules-nixos`: A module that calls `nixos-rebuild switch --target-host` or implements similar functionality
|
||
|
|
|
||
|
|
Expected needs:
|
||
|
|
|
||
|
|
- `nixops4-resources-proxmox`
|
||
|
|
- A resource provider that talks to a DNS server's API
|
||
|
|
|
||
|
|
## Steps
|
||
|
|
|
||
|
|
### 1. `landscaper` setup
|
||
|
|
|
||
|
|
1. connect your first server into the network
|
||
|
|
|
||
|
|
2. boot `landscaper.iso` from a usb stick, and install NixOS onto this server we'll call `landscaper`
|
||
|
|
|
||
|
|
`landscaper.iso` is a slightly customized NixOS installer that includes the `landscaper` NixOS module
|
||
|
|
in the default config that it generates
|
||
|
|
- mvp: copy and import the landscaper module by hand into the normal NixOS live system
|
||
|
|
|
||
|
|
The `landscaper` module contains
|
||
|
|
- nixops4 (mvp and initial setup)
|
||
|
|
- a nixops4 service (if/when nix-panel is capable of managing the infra)
|
||
|
|
- a tftp server
|
||
|
|
|
||
|
|
The NixOS installer puts the template NixOps4 expression in `/root/fediversity-network`
|
||
|
|
|
||
|
|
### 2. Add a proxmox host
|
||
|
|
|
||
|
|
1. - add a MAC address and IP address to the `proxmoxMACs` option (or similar)
|
||
|
|
- this automatically declares resources that will set up the new server
|
||
|
|
- `installation_host_key`: a temporary SSH host key pair
|
||
|
|
- `installation_pxe_nbp`: an entry in `landscaper`'s PXE server, referring to/including a kernel and initrd that run disko and performs a NixOS installation on the server disk(s)
|
||
|
|
- `ssh_host_public_key`: a resource that waits for SSH to come up, logs in to replace the host key and sends the returns the new public key as its resource output
|
||
|
|
- `nixos`: a resource that `nix copy`-es a NixOS toplevel, then updates the system profile and activates it
|
||
|
|
|
||
|
|
- unknown: built-in services like Nix-panel, perhaps depending on the number of `proxmoxMACs`
|
||
|
|
2. `nixops apply`
|
||
|
|
- this starts to create resources,
|
||
|
|
- up to the point that `ssh_host_public_key` waits for the server to boot
|
||
|
|
3. turn on the server
|
||
|
|
4. wait for `nixops apply` to complete
|
||
|
|
|
||
|
|
## Notes
|
||
|
|
|
||
|
|
Unknown: add to step 2 or step 3 (new), depending on the amount of shared infra:
|
||
|
|
- resources for certain objects in the proxmox api
|
||
|
|
- this creates nixpanel, and shared infrastructure
|
||
|
|
|