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