Luke Granger-Brown
57725ef3ec
git-subtree-dir: third_party/nixpkgs git-subtree-split: 76612b17c0ce71689921ca12d9ffdc9c23ce40b2
90 lines
3 KiB
Nix
90 lines
3 KiB
Nix
import ./make-test-python.nix ({ pkgs, lib, ... }: {
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name = "containers-tmpfs";
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meta = {
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maintainers = with lib.maintainers; [ patryk27 ];
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};
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nodes.machine =
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{ pkgs, ... }:
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{ imports = [ ../modules/installer/cd-dvd/channel.nix ];
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virtualisation.writableStore = true;
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containers.tmpfs =
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{
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autoStart = true;
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tmpfs = [
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# Mount var as a tmpfs
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"/var"
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# Add a nested mount inside a tmpfs
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"/var/log"
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# Add a tmpfs on a path that does not exist
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"/some/random/path"
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];
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config = { };
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};
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virtualisation.additionalPaths = [ pkgs.stdenv ];
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};
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testScript = ''
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machine.wait_for_unit("default.target")
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assert "tmpfs" in machine.succeed("nixos-container list")
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with subtest("tmpfs container is up"):
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assert "up" in machine.succeed("nixos-container status tmpfs")
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def tmpfs_cmd(command):
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return f"nixos-container run tmpfs -- {command} 2>/dev/null"
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with subtest("/var is mounted as a tmpfs"):
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machine.succeed(tmpfs_cmd("mountpoint -q /var"))
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with subtest("/var/log is mounted as a tmpfs"):
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assert "What: tmpfs" in machine.succeed(
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tmpfs_cmd("systemctl status var-log.mount --no-pager")
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)
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machine.succeed(tmpfs_cmd("mountpoint -q /var/log"))
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with subtest("/some/random/path is mounted as a tmpfs"):
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assert "What: tmpfs" in machine.succeed(
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tmpfs_cmd("systemctl status some-random-path.mount --no-pager")
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)
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machine.succeed(tmpfs_cmd("mountpoint -q /some/random/path"))
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with subtest(
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"files created in the container in a non-tmpfs directory are visible on the host."
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):
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# This establishes legitimacy for the following tests
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machine.succeed(
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tmpfs_cmd("touch /root/test.file"),
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tmpfs_cmd("ls -l /root | grep -q test.file"),
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"test -e /var/lib/nixos-containers/tmpfs/root/test.file",
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)
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with subtest(
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"/some/random/path is writable and that files created there are not "
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+ "in the hosts container dir but in the tmpfs"
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):
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machine.succeed(
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tmpfs_cmd("touch /some/random/path/test.file"),
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tmpfs_cmd("test -e /some/random/path/test.file"),
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)
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machine.fail("test -e /var/lib/nixos-containers/tmpfs/some/random/path/test.file")
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with subtest(
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"files created in the hosts container dir in a path where a tmpfs "
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+ "file system has been mounted are not visible to the container as "
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+ "the do not exist in the tmpfs"
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):
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machine.succeed(
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"touch /var/lib/nixos-containers/tmpfs/var/test.file",
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"test -e /var/lib/nixos-containers/tmpfs/var/test.file",
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"ls -l /var/lib/nixos-containers/tmpfs/var/ | grep -q test.file 2>/dev/null",
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)
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machine.fail(tmpfs_cmd("ls -l /var | grep -q test.file"))
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'';
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})
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