132 lines
6.2 KiB
Nix
132 lines
6.2 KiB
Nix
import ../make-test-python.nix ({ pkgs, lib, extra ? {}, name ? "incus-container", incus ? pkgs.incus-lts, ... } :
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let
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releases = import ../../release.nix {
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configuration = lib.recursiveUpdate {
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# Building documentation makes the test unnecessarily take a longer time:
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documentation.enable = lib.mkForce false;
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boot.kernel.sysctl."net.ipv4.ip_forward" = "1";
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}
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extra;
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};
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container-image-metadata = "${releases.incusContainerMeta.${pkgs.stdenv.hostPlatform.system}}/tarball/nixos-system-${pkgs.stdenv.hostPlatform.system}.tar.xz";
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container-image-rootfs = "${releases.incusContainerImage.${pkgs.stdenv.hostPlatform.system}}/nixos-lxc-image-${pkgs.stdenv.hostPlatform.system}.squashfs";
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in
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{
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inherit name;
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meta = {
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maintainers = lib.teams.lxc.members;
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};
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nodes.machine = { ... }: {
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virtualisation = {
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# Ensure test VM has enough resources for creating and managing guests
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cores = 2;
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memorySize = 1024;
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diskSize = 4096;
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incus = {
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enable = true;
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package = incus;
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};
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};
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networking.nftables.enable = true;
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};
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testScript = ''
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def instance_is_up(_) -> bool:
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status, _ = machine.execute("incus exec container --disable-stdin --force-interactive /run/current-system/sw/bin/systemctl -- is-system-running")
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return status == 0
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def set_container(config):
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machine.succeed(f"incus config set container {config}")
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machine.succeed("incus restart container")
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with machine.nested("Waiting for instance to start and be usable"):
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retry(instance_is_up)
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def check_sysctl(instance):
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with subtest("systemd sysctl settings are applied"):
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machine.succeed(f"incus exec {instance} -- systemctl status systemd-sysctl")
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sysctl = machine.succeed(f"incus exec {instance} -- sysctl net.ipv4.ip_forward").strip().split(" ")[-1]
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assert "1" == sysctl, f"systemd-sysctl configuration not correctly applied, {sysctl} != 1"
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machine.wait_for_unit("incus.service")
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# no preseed should mean no service
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machine.fail("systemctl status incus-preseed.service")
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machine.succeed("incus admin init --minimal")
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with subtest("Container image can be imported"):
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machine.succeed("incus image import ${container-image-metadata} ${container-image-rootfs} --alias nixos")
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with subtest("Container can be launched and managed"):
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machine.succeed("incus launch nixos container")
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with machine.nested("Waiting for instance to start and be usable"):
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retry(instance_is_up)
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machine.succeed("echo true | incus exec container /run/current-system/sw/bin/bash -")
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with subtest("Container mounts lxcfs overlays"):
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machine.succeed("incus exec container mount | grep 'lxcfs on /proc/cpuinfo type fuse.lxcfs'")
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machine.succeed("incus exec container mount | grep 'lxcfs on /proc/meminfo type fuse.lxcfs'")
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with subtest("resource limits"):
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with subtest("Container CPU limits can be managed"):
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set_container("limits.cpu 1")
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cpuinfo = machine.succeed("incus exec container grep -- -c ^processor /proc/cpuinfo").strip()
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assert cpuinfo == "1", f"Wrong number of CPUs reported from /proc/cpuinfo, want: 1, got: {cpuinfo}"
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set_container("limits.cpu 2")
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cpuinfo = machine.succeed("incus exec container grep -- -c ^processor /proc/cpuinfo").strip()
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assert cpuinfo == "2", f"Wrong number of CPUs reported from /proc/cpuinfo, want: 2, got: {cpuinfo}"
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with subtest("Container memory limits can be managed"):
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set_container("limits.memory 64MB")
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meminfo = machine.succeed("incus exec container grep -- MemTotal /proc/meminfo").strip()
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meminfo_bytes = " ".join(meminfo.split(' ')[-2:])
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assert meminfo_bytes == "62500 kB", f"Wrong amount of memory reported from /proc/meminfo, want: '62500 kB', got: '{meminfo_bytes}'"
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set_container("limits.memory 128MB")
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meminfo = machine.succeed("incus exec container grep -- MemTotal /proc/meminfo").strip()
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meminfo_bytes = " ".join(meminfo.split(' ')[-2:])
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assert meminfo_bytes == "125000 kB", f"Wrong amount of memory reported from /proc/meminfo, want: '125000 kB', got: '{meminfo_bytes}'"
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with subtest("lxc-generator"):
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with subtest("lxc-container generator configures plain container"):
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# reuse the existing container to save some time
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machine.succeed("incus exec container test -- -e /run/systemd/system/service.d/zzz-lxc-service.conf")
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check_sysctl("container")
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with subtest("lxc-container generator configures nested container"):
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machine.execute("incus delete --force container")
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machine.succeed("incus launch nixos container --config security.nesting=true")
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with machine.nested("Waiting for instance to start and be usable"):
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retry(instance_is_up)
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machine.fail("incus exec container test -- -e /run/systemd/system/service.d/zzz-lxc-service.conf")
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target = machine.succeed("incus exec container readlink -- -f /run/systemd/system/systemd-binfmt.service").strip()
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assert target == "/dev/null", "lxc generator did not correctly mask /run/systemd/system/systemd-binfmt.service"
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check_sysctl("container")
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with subtest("lxc-container generator configures privileged container"):
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machine.execute("incus delete --force container")
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machine.succeed("incus launch nixos container --config security.privileged=true")
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with machine.nested("Waiting for instance to start and be usable"):
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retry(instance_is_up)
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machine.succeed("incus exec container test -- -e /run/systemd/system/service.d/zzz-lxc-service.conf")
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check_sysctl("container")
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with subtest("softDaemonRestart"):
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with subtest("Instance remains running when softDaemonRestart is enabled and services is stopped"):
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pid = machine.succeed("incus info container | grep 'PID'").split(":")[1].strip()
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machine.succeed(f"ps {pid}")
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machine.succeed("systemctl stop incus")
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machine.succeed(f"ps {pid}")
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'';
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})
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