import ./make-test-python.nix ({ pkgs, ...} : let # Since we don't have access to the internet during the tests, we have to # pre-fetch lxd containers beforehand. # # I've chosen to import Alpine Linux, because its image is turbo-tiny and, # generally, sufficient for our tests. alpine-meta = pkgs.fetchurl { url = "https://tarballs.nixos.org/alpine/3.12/lxd.tar.xz"; hash = "sha256-1tcKaO9lOkvqfmG/7FMbfAEToAuFy2YMewS8ysBKuLA="; }; alpine-rootfs = pkgs.fetchurl { url = "https://tarballs.nixos.org/alpine/3.12/rootfs.tar.xz"; hash = "sha256-Tba9sSoaiMtQLY45u7p5DMqXTSDgs/763L/SQp0bkCA="; }; lxd-config = pkgs.writeText "config.yaml" '' storage_pools: - name: default driver: dir config: source: /var/lxd-pool networks: - name: lxdbr0 type: bridge config: ipv4.address: auto ipv6.address: none profiles: - name: default devices: eth0: name: eth0 network: lxdbr0 type: nic root: path: / pool: default type: disk ''; in { name = "lxd"; meta = with pkgs.lib.maintainers; { maintainers = [ patryk27 ]; }; machine = { lib, ... }: { virtualisation = { # Since we're testing `limits.cpu`, we've gotta have a known number of # cores to lean on cores = 2; # Ditto, for `limits.memory` memorySize = 512; lxc.lxcfs.enable = true; lxd.enable = true; }; }; testScript = '' machine.wait_for_unit("sockets.target") machine.wait_for_unit("lxd.service") machine.wait_for_file("/var/lib/lxd/unix.socket") # It takes additional second for lxd to settle machine.sleep(1) # lxd expects the pool's directory to already exist machine.succeed("mkdir /var/lxd-pool") machine.succeed( "cat ${lxd-config} | lxd init --preseed" ) machine.succeed( "lxc image import ${alpine-meta} ${alpine-rootfs} --alias alpine" ) with subtest("Containers can be launched and destroyed"): machine.succeed("lxc launch alpine test") machine.succeed("lxc exec test true") machine.succeed("lxc delete -f test") with subtest("Containers are being mounted with lxcfs inside"): machine.succeed("lxc launch alpine test") ## ---------- ## ## limits.cpu ## machine.succeed("lxc config set test limits.cpu 1") machine.succeed("lxc restart test") # Since Alpine doesn't have `nproc` pre-installed, we've gotta resort # to the primal methods assert ( "1" == machine.succeed("lxc exec test grep -- -c ^processor /proc/cpuinfo").strip() ) machine.succeed("lxc config set test limits.cpu 2") machine.succeed("lxc restart test") assert ( "2" == machine.succeed("lxc exec test grep -- -c ^processor /proc/cpuinfo").strip() ) ## ------------- ## ## limits.memory ## machine.succeed("lxc config set test limits.memory 64MB") machine.succeed("lxc restart test") assert ( "MemTotal: 62500 kB" == machine.succeed("lxc exec test grep -- MemTotal /proc/meminfo").strip() ) machine.succeed("lxc config set test limits.memory 128MB") machine.succeed("lxc restart test") assert ( "MemTotal: 125000 kB" == machine.succeed("lxc exec test grep -- MemTotal /proc/meminfo").strip() ) machine.succeed("lxc delete -f test") with subtest("Unless explicitly changed, lxd leans on iptables"): machine.succeed("lsmod | grep ip_tables") machine.fail("lsmod | grep nf_tables") ''; })