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content/posts/building-proxmox-templates-packer-github-actions/index.md
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@ -23,7 +23,7 @@ tags:
I've been [using Proxmox](/ditching-vsphere-for-proxmox/) in my [homelab](/homelab/) for a little while now, and I recently expanded the environment a bit with the addition of two HP Elite Mini 800 G9 computers. I figured it was time to start automating the process of building and maintaining my VM templates. I already had functional [Packer templates for VMware](https://github.com/jbowdre/packer-vsphere-templates) so I used that content as a starting point for the [Proxmox builds](https://github.com/jbowdre/packer-proxmox-templates). Once I had the builds working locally, I just had to explore how to automate them.
This post will describe how I did it. It will cover a lot of the implementation details but may gloss over some general setup steps; you'll likely need at least passing familiarity with [Packer](https://www.packer.io/) and [Vault](https://www.vaultproject.io/) to take this on.
This post will describe how I did it. It will cover a lot of the implementation details but may gloss over some general setup steps; you'll need at least passing familiarity with [Packer](https://www.packer.io/) and [Vault](https://www.vaultproject.io/) to take this on.
### Component Overview
There are a lot of parts to this setup, so let's start by quickly running through those:
@ -41,15 +41,15 @@ I don't like the idea of randos running arbitrary code on my home infrastructure
{{% /notice %}}
### Proxmox Setup
The only configuration I did on the Proxmox side of things was to [create a user account](https://pve.proxmox.com/pve-docs/chapter-pveum.html#pveum_users) that Packer could use. I call it `packer` but don't set a password for it. Instead, I'll set up an [API token](https://pve.proxmox.com/pve-docs/chapter-pveum.html#pveum_tokens) for that account, making sure to uncheck the "Privilege Separation" box so that the token will inherit the same permissions as the user itself.
The only configuration I did on the Proxmox side of things was to [create a user account](https://pve.proxmox.com/pve-docs/chapter-pveum.html#pveum_users) that Packer could use. I called it `packer` but didn't set a password for it. Instead, I set up an [API token](https://pve.proxmox.com/pve-docs/chapter-pveum.html#pveum_tokens) for that account, making sure to uncheck the "Privilege Separation" box so that the token inherits the same permissions as the user itself.
![Creating an API token](proxmox-token.png)
To use the token, I'll need the ID (in the form `USERNAME@REALM!TOKENNAME`) and the UUID-looking secret, which is only displayed once so I be sure to record it in a safe place.
To use the token, I needed the ID (in the form `USERNAME@REALM!TOKENNAME`) and the UUID-looking secret, which is only displayed once so I made sure to record it in a safe place.
Speaking of privileges, the [Proxmox ISO integration documentation](https://developer.hashicorp.com/packer/integrations/hashicorp/proxmox/latest/components/builder/iso) didn't offer any details on the minimum required permissions, and none of my attempts worked until I eventually assigned the Administrator role to the `packer` user.
Speaking of privileges, the [Proxmox ISO integration documentation](https://developer.hashicorp.com/packer/integrations/hashicorp/proxmox/latest/components/builder/iso) doesn't offer any details on the minimum required permissions, and none of my attempts worked until I eventually assigned the Administrator role to the `packer` user. (I plan on doing more testing to narrow the scope a bit before running this in production, but this will do for my homelab purposes.)
Otherwise I'll just need to figure out the details like which network bridge, ISO storage, and VM storage the Packer-built VMs should use.
Otherwise I just needed to figure out the details like which network bridge, ISO storage, and VM storage the Packer-built VMs should use.
### Vault Configuration
I use [Vault](https://github.com/hashicorp/vault) to hold the configuration details for the template builds - not just traditional secrets like usernames and passwords, but basically *every environment-specific setting* as well. This approach lets others use my Packer code without having to change much (if any) of it; every value that I expect to change between environments is retrieved from Vault at run time.