# Panfactum Changelog — edge.24-10-18

> Replaces devenv with plain nix flakes for significantly improved performance, upgrades Cilium and AWS EBS CSI drivers, adds CDN support for core components, and fixes various resource utilization and git-related issues.

## Highlights

- devenv replaced with plain nix flakes — macOS initial install now ~5 minutes (down from 45+)
- `pf-get-version-hash` renamed to `pf-get-commit-hash` with updated argument format
- `pgadmin4` removed from devShell — choose your own database client
- Cilium upgraded to v1.16.3 — 75MB per-node memory reduction

## Breaking Changes

- [devenv](https://devenv.sh/) has been removed in favor of plain [nix flakes](https://nixos.wiki/wiki/Flakes). The `flake.nix` syntax has changed and `devenv.nix` files can be
  - Impacts: configuration `flake.nix` — Syntax changed due to devenv removal; devenv.nix files can be deleted
- `pf-get-version-hash` has been renamed to `pf-get-commit-hash` and now takes named rather than positional arguments.
  - Impacts: devshell `pf-get-commit-hash` — Renamed from pf-get-version-hash with named arguments
- Removes `pgadmin4` from the devShell as it significantly increased build times.

## Additions

- Adds `cdn_mode_enabled` to [`kube_vault`](https://panfactum.com/docs/edge/reference/infrastructure-modules/direct/kubernetes/kube_vault) and [`kube_authentik`](https://panfactum.com/docs/edge/reference/infrastructure-modules/direct/kubernetes/kube_authentik).
  - Impacts: iac-module `kube_vault` — Added cdn_mode_enabled input variable
  - Impacts: iac-module `kube_authentik` — Added cdn_mode_enabled input variable
- Adds `image_tag_prefix` to [`wf_dockerfile_build`](https://panfactum.com/docs/edge/reference/infrastructure-modules/submodule/workflow/wf_dockerfile_build).
  - Impacts: iac-module `wf_dockerfile_build` — Added image_tag_prefix input variable

## Improvements

- Upgrades [`kube_cilium`](https://panfactum.com/docs/edge/reference/infrastructure-modules/direct/kubernetes/kube_cilium) to v1.16.3, reducing per-node memory usage by 75MB and reducing bootstrapping errors.
  - Impacts: iac-module `kube_cilium` — Upgraded to v1.16.3 with 75MB per-node memory reduction
- Upgrades [`kube_aws_ebs_csi`](https://panfactum.com/docs/edge/reference/infrastructure-modules/direct/kubernetes/kube_aws_ebs_csi) to v1.36 for improved node shutdown performance.
  - Impacts: iac-module `kube_aws_ebs_csi` — Upgraded to v1.36 for improved node shutdown performance
- Updates [`wf_dockerfile_build`](https://panfactum.com/docs/edge/reference/infrastructure-modules/submodule/workflow/wf_dockerfile_build) to support 10 concurrent image builds per module rather than just one.
  - Impacts: iac-module `wf_dockerfile_build` — Now supports 10 concurrent image builds per module

## Fixes

- Fixed scheduling constraint bugs that resulted in less-than-optimal resource utilization, especially in tiny clusters.
  - Reference (issue-report): [Scheduling constraint bugs causing poor resource utilization](https://github.com/Panfactum/stack/issues/167)
- Fixed an issue where `pf_stack_version` could not be a commit hash.
- Fixed an issue where `pf-wf-git-checkout` would fail when given a branch name as a git ref.
  - Impacts: devshell `pf-wf-git-checkout` — Fixed failure when using branch names as git refs

## Upgrade Instructions

## Migrate from devenv to Plain Nix Flakes

[devenv](https://devenv.sh/) has been removed from the Panfactum Stack in favor of plain
[nix flakes](https://nixos.wiki/wiki/Flakes). This brings significantly improved performance on macOS (initial
installation ~5 minutes, down from 45+) and opens the shell instantly after initial setup.

### Update `flake.nix`

**Before:**

```nix
{
    inputs = {
        pkgs.url = "github:NixOS/nixpkgs/nixos-23.11";
        panfactum.url = "github:panfactum/stack/__PANFACTUM_VERSION_EDGE__";
    };

    outputs = { self, panfactum, pkgs, ... } @ inputs: {
        devShells = panfactum.lib.mkDevShells {
            inherit pkgs;
            modules = [ (import ./devenv.nix )];
        };
    };
}
```

**After:**

```nix
{
  inputs = {
    flake-utils.url = "github:numtide/flake-utils";
    panfactum.url = "github:panfactum/stack/__PANFACTUM_VERSION_EDGE__";
  };

  outputs = { panfactum, flake-utils, ... }@inputs:
    flake-utils.lib.eachDefaultSystem
    (system:
      {
        devShell = panfactum.lib.${system}.mkDevShell { };
      }
    );
}
```

### Remove devenv Files

1. Remove your `devenv.nix` file.

2. Remove the `.devenv` directory.

For alternatives to devenv functionality using the new devShell paradigm, see
[our documentation.](https://panfactum.com/docs/main/guides/development-shell/customizing)

### Renamed Command

`pf-get-version-hash` has been renamed to `pf-get-commit-hash`. It now takes named rather than positional arguments.
Update any scripts or CI configurations that use this command.

## Related Resources

- [JSON Data](https://panfactum.com/docs/changelog/edge.24-10-18.json): Machine-readable data
- [Channel Release List](https://panfactum.com/docs/changelog/edge.json): All releases in this channel