71 lines
2 KiB
Nix
71 lines
2 KiB
Nix
{ lib, ... }: {
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name = "qemu-vm-store";
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meta.maintainers = with lib.maintainers; [ nikstur ];
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nodes = {
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sharedWritable = {
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virtualisation.writableStore = true;
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};
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sharedReadOnly = {
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virtualisation.writableStore = false;
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};
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imageWritable = {
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virtualisation.useNixStoreImage = true;
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virtualisation.writableStore = true;
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};
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imageReadOnly = {
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virtualisation.useNixStoreImage = true;
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virtualisation.writableStore = false;
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};
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fullDisk = {
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virtualisation.useBootLoader = true;
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};
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};
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testScript = ''
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build_derivation = """
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nix-build --option substitute false -E 'derivation {
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name = "t";
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builder = "/bin/sh";
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args = ["-c" "echo something > $out"];
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system = builtins.currentSystem;
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preferLocalBuild = true;
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}'
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"""
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start_all()
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with subtest("Nix Store is writable"):
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sharedWritable.succeed(build_derivation)
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imageWritable.succeed(build_derivation)
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fullDisk.succeed(build_derivation)
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with subtest("Nix Store is read only"):
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sharedReadOnly.fail(build_derivation)
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imageReadOnly.fail(build_derivation)
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# Checking whether the fs type is 9P is just a proxy to test whether the
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# Nix Store is shared. If we switch to a different technology (e.g.
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# virtiofs) for sharing, we need to adjust these tests.
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with subtest("Nix store is shared from the host via 9P"):
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sharedWritable.succeed("findmnt --kernel --type 9P /nix/.ro-store")
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sharedReadOnly.succeed("findmnt --kernel --type 9P /nix/.ro-store")
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with subtest("Nix store is not shared via 9P"):
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imageWritable.fail("findmnt --kernel --type 9P /nix/.ro-store")
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imageReadOnly.fail("findmnt --kernel --type 9P /nix/.ro-store")
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with subtest("Nix store is not mounted separately"):
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rootDevice = fullDisk.succeed("stat -c %d /")
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nixStoreDevice = fullDisk.succeed("stat -c %d /nix/store")
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assert rootDevice == nixStoreDevice, "Nix store is mounted separately from the root fs"
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'';
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}
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