Torjus Håkestad
38c104ea8c
Bootstrap times can be improved by configuring the base template to use the local nix cache during initial builds. Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
36 lines
1.2 KiB
Markdown
36 lines
1.2 KiB
Markdown
# Plan: Configure Template2 to Use Nix Cache
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## Problem
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New VMs bootstrapped from template2 don't use our local nix cache (nix-cache.home.2rjus.net) during the initial `nixos-rebuild boot`. This means the first build downloads everything from cache.nixos.org, which is slower and uses more bandwidth.
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## Solution
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Update the template2 base image to include the nix cache configuration, so new VMs immediately benefit from cached builds during bootstrap.
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## Implementation
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1. Add nix cache configuration to `hosts/template2/configuration.nix`:
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```nix
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nix.settings = {
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substituters = [ "https://nix-cache.home.2rjus.net" "https://cache.nixos.org" ];
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trusted-public-keys = [
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"nix-cache.home.2rjus.net:..." # Add the cache's public key
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"cache.nixos.org-1:..."
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];
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};
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```
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2. Rebuild and redeploy the Proxmox template:
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```bash
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nix develop -c ansible-playbook -i playbooks/inventory.ini playbooks/build-and-deploy-template.yml
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```
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3. Update `default_template_name` in `terraform/variables.tf` if the template name changed
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## Benefits
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- Faster VM bootstrap times
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- Reduced bandwidth to external cache
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- Most derivations will already be cached from other hosts
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