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