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# Test for NixOS' container support.
import ./make-test.nix ({ pkgs, ...} : {
name = "containers-tmpfs";
meta = with pkgs.stdenv.lib.maintainers; {
maintainers = [ ckampka ];
};
machine =
{ pkgs, ... }:
{ imports = [ ../modules/installer/cd-dvd/channel.nix ];
virtualisation.writableStore = true;
virtualisation.memorySize = 768;
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.pathsInNixDB = [ pkgs.stdenv ];
};
testScript =
''
$machine->waitForUnit("default.target");
$machine->succeed("nixos-container list") =~ /tmpfs/ or die;
# Start the tmpfs container.
#$machine->succeed("nixos-container status tmpfs") =~ /up/ or die;
# Verify that /var is mounted as a tmpfs
#$machine->succeed("nixos-container run tmpfs -- systemctl status var.mount --no-pager 2>/dev/null") =~ /What: tmpfs/ or die;
$machine->succeed("nixos-container run tmpfs -- mountpoint -q /var 2>/dev/null");
# Verify that /var/log is mounted as a tmpfs
$machine->succeed("nixos-container run tmpfs -- systemctl status var-log.mount --no-pager 2>/dev/null") =~ /What: tmpfs/ or die;
$machine->succeed("nixos-container run tmpfs -- mountpoint -q /var/log 2>/dev/null");
# Verify that /some/random/path is mounted as a tmpfs
$machine->succeed("nixos-container run tmpfs -- systemctl status some-random-path.mount --no-pager 2>/dev/null") =~ /What: tmpfs/ or die;
$machine->succeed("nixos-container run tmpfs -- mountpoint -q /some/random/path 2>/dev/null");
# Verify that files created in the container in a non-tmpfs directory are visible on the host.
# This establishes legitimacy for the following tests
$machine->succeed("nixos-container run tmpfs -- touch /root/test.file 2>/dev/null");
$machine->succeed("nixos-container run tmpfs -- ls -l /root | grep -q test.file 2>/dev/null");
$machine->succeed("test -e /var/lib/containers/tmpfs/root/test.file");
# Verify that /some/random/path is writable and that files created there
# are not in the hosts container dir but in the tmpfs
$machine->succeed("nixos-container run tmpfs -- touch /some/random/path/test.file 2>/dev/null");
$machine->succeed("nixos-container run tmpfs -- test -e /some/random/path/test.file 2>/dev/null");
$machine->fail("test -e /var/lib/containers/tmpfs/some/random/path/test.file");
# Verify that 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/containers/tmpfs/var/test.file");
$machine->succeed("test -e /var/lib/containers/tmpfs/var/test.file");
$machine->succeed("ls -l /var/lib/containers/tmpfs/var/ | grep -q test.file 2>/dev/null");
$machine->fail("nixos-container run tmpfs -- ls -l /var | grep -q test.file 2>/dev/null");
'';
})
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