Replace RHEL with Rocky Linux in VM tests

.github/workflows/ci.yml

@@ -261,9 +261,8 @@ jobs:
           - ubuntu-v24_04
           - fedora-v36
           - fedora-v37
-          - rhel-v7
-          - rhel-v8
-          - rhel-v9
+          - rocky-v8
+          - rocky-v9
           - opensuse-leap-v15_6
           - archlinux-v20260115
     steps:

CONTRIBUTING.md

@@ -84,15 +84,12 @@ git+file:///home/ana/git/determinatesystems/nix-installer
 │       ├───fedora-v36
 │       │   └───x86_64-linux
 │       │       └───install-default: derivation 'installer-test-fedora-v36-install-default'
-│       ├───rhel-v7
+│       ├───rocky-v8
 │       │   └───x86_64-linux
-│       │       └───install-default: derivation 'installer-test-rhel-v7-install-default'
-│       ├───rhel-v8
+│       │       └───install-default: derivation 'installer-test-rocky-v8-install-default'
+│       ├───rocky-v9
 │       │   └───x86_64-linux
-│       │       └───install-default: derivation 'installer-test-rhel-v8-install-default'
-│       ├───rhel-v9
-│       │   └───x86_64-linux
-│       │       └───install-default: derivation 'installer-test-rhel-v9-install-default'
+│       │       └───install-default: derivation 'installer-test-rocky-v9-install-default'
 │       └───ubuntu-v22_04
 │           └───x86_64-linux
 │               └───install-default: derivation 'installer-test-ubuntu-v22_04-install-default'
@@ -107,7 +104,7 @@ nix build .#hydraJobs.vm-test.all.x86_64-linux.all -L
 To run a specific distribution listed in the `nix flake show` output:
 
 ```bash
-nix build .#hydraJobs.vm-test.rhel-v7.x86_64-linux.all -L -j 4
+nix build .#hydraJobs.vm-test.rocky-v8.x86_64-linux.all -L -j 4
 ```
 
 > You may wish to set `-j 4` to some other number. Some OS's (Ubuntu 16.04) exhibit problems rapidly updating their users/groups on a system running dozens of VMs.
@@ -121,31 +118,31 @@ nix build github:NixOS/nix-installer/${BRANCH}#hydraJobs.vm-test.ubuntu-v22_04.x
 <details>
   <summary><strong>Adding a distro?</strong></summary>
 
-Notice how `rhel-v7` has a `v7`, not just `7`? That's so the test output shows correctly, as Nix will interpret the first `-\d` (eg `-7`, `-123213`) as a version, and not show it in the output.
+Notice how `rocky-v8` has a `v8`, not just `8`? That's so the test output shows correctly, as Nix will interpret the first `-\d` (eg `-8`, `-123213`) as a version, and not show it in the output.
 
-Using `v7` instead turns:
+Using `v8` instead turns:
 
 ```
 # ...
-installer-test-rhel> Unpacking Vagrant box /nix/store/8maga4w267f77agb93inbg54whh5lxhn-libvirt.box...
-installer-test-rhel> Vagrantfile
-installer-test-rhel> box.img
-installer-test-rhel> info.json
-installer-test-rhel> metadata.json
-installer-test-rhel> Formatting './disk.qcow2', fmt=qcow2 cluster_size=65536 extended_l2=off compression_type=zlib size=137438953472 backing_file=./box.img backing_fmt=qcow2 lazy_refcounts=off refcount_bits=16
+installer-test-rocky> Unpacking Vagrant box /nix/store/8maga4w267f77agb93inbg54whh5lxhn-libvirt.box...
+installer-test-rocky> Vagrantfile
+installer-test-rocky> box.img
+installer-test-rocky> info.json
+installer-test-rocky> metadata.json
+installer-test-rocky> Formatting './disk.qcow2', fmt=qcow2 cluster_size=65536 extended_l2=off compression_type=zlib size=137438953472 backing_file=./box.img backing_fmt=qcow2 lazy_refcounts=off refcount_bits=16
 # ...
 ```
 
 Into this:
 
 ```
 # ...
-installer-test-rhel-v7-install-default> Unpacking Vagrant box /nix/store/8maga4w267f77agb93inbg54whh5lxhn-libvirt.box...
-installer-test-rhel-v7-install-default> Vagrantfile
-installer-test-rhel-v7-install-default> box.img
-installer-test-rhel-v7-install-default> info.json
-installer-test-rhel-v7-install-default> metadata.json
-installer-test-rhel-v7-install-default> Formatting './disk.qcow2', fmt=qcow2 cluster_size=65536 extended_l2=off compression_type=zlib size=137438953472 backing_file=./box.img backing_fmt=qcow2 lazy_refcounts=off refcount_bits=16
+installer-test-rocky-v8-install-default> Unpacking Vagrant box /nix/store/8maga4w267f77agb93inbg54whh5lxhn-libvirt.box...
+installer-test-rocky-v8-install-default> Vagrantfile
+installer-test-rocky-v8-install-default> box.img
+installer-test-rocky-v8-install-default> info.json
+installer-test-rocky-v8-install-default> metadata.json
+installer-test-rocky-v8-install-default> Formatting './disk.qcow2', fmt=qcow2 cluster_size=65536 extended_l2=off compression_type=zlib size=137438953472 backing_file=./box.img backing_fmt=qcow2 lazy_refcounts=off refcount_bits=16
 # ...
 ```
 

nix/tests/vm-test/default.nix

@@ -421,28 +421,19 @@ let
       system = "x86_64-linux";
     };
 
-    "rhel-v7" = {
+    "rocky-v8" = {
       image = import <nix/fetchurl.nix> {
-        url = "https://app.vagrantup.com/generic/boxes/rhel7/versions/4.1.12/providers/libvirt.box";
-        hash = "sha256-b4afnqKCO9oWXgYHb9DeQ2berSwOjS27rSd9TxXDc/U=";
+        url = "https://app.vagrantup.com/generic/boxes/rocky8/versions/4.1.12/providers/libvirt.box";
+        hash = "sha256-IAjRT9h1T3Fc/1+aIbKlPLn3uP29cqM+JRVoFztHWV4=";
       };
       rootDisk = "box.img";
       system = "x86_64-linux";
     };
 
-    "rhel-v8" = {
+    "rocky-v9" = {
       image = import <nix/fetchurl.nix> {
-        url = "https://app.vagrantup.com/generic/boxes/rhel8/versions/4.1.12/providers/libvirt.box";
-        hash = "sha256-zFOPjSputy1dPgrQRixBXmlyN88cAKjJ21VvjSWUCUY=";
-      };
-      rootDisk = "box.img";
-      system = "x86_64-linux";
-    };
-
-    "rhel-v9" = {
-      image = import <nix/fetchurl.nix> {
-        url = "https://app.vagrantup.com/generic/boxes/rhel9/versions/4.1.12/providers/libvirt.box";
-        hash = "sha256-vL/FbB3kK1rcSaR627nWmScYGKGk4seSmAdq6N5diMg=";
+        url = "https://app.vagrantup.com/generic/boxes/rocky9/versions/4.1.12/providers/libvirt.box";
+        hash = "sha256-1M7JDMYYYwAwIBvDOsixH/umefPvZ0bCaWzSG1DwX5Y=";
       };
       rootDisk = "box.img";
       system = "x86_64-linux";