nixpkgs/nixos/tests/cntr.nix
Gabriella Gonzalez 0b6fa5ee40
virtualisation.oci-containers: Add new imageStream option (#335430)
This adds a new `imageStream` option that can be used in conjunction
with `pkgs.dockerTools.streamLayeredImage` so that the image archive
never needs to be materialized in the `/nix/store`.  This greatly
improves the disk utilization for systems that use container images
built using Nix because they only need to store image layers instead of
the full image.  Additionally, when deploying the new system and only
new layers need to be built/copied.
2024-08-24 04:38:27 +02:00

76 lines
2.6 KiB
Nix

# Test for cntr tool
{ system ? builtins.currentSystem, config ? { }
, pkgs ? import ../.. { inherit system config; }, lib ? pkgs.lib }:
let
inherit (import ../lib/testing-python.nix { inherit system pkgs; }) makeTest;
mkOCITest = backend:
makeTest {
name = "cntr-${backend}";
meta = { maintainers = with lib.maintainers; [ sorki mic92 ]; };
nodes = {
${backend} = { pkgs, ... }: {
environment.systemPackages = [ pkgs.cntr ];
virtualisation.oci-containers = {
inherit backend;
containers.nginx = {
image = "nginx-container";
imageStream = pkgs.dockerTools.examples.nginxStream;
ports = [ "8181:80" ];
};
};
};
};
testScript = ''
start_all()
${backend}.wait_for_unit("${backend}-nginx.service")
${backend}.wait_for_open_port(8181)
# For some reason, the cntr command hangs when run without the &.
# As such, we have to do some messy things to ensure we check the exitcode and output in a race-condition-safe manner
${backend}.execute(
"(cntr attach -t ${backend} nginx sh -- -c 'curl localhost | grep Hello' > /tmp/result; echo $? > /tmp/exitcode; touch /tmp/done) &"
)
${backend}.wait_for_file("/tmp/done")
assert "0" == ${backend}.succeed("cat /tmp/exitcode").strip(), "non-zero exit code"
assert "Hello" in ${backend}.succeed("cat /tmp/result"), "no greeting in output"
'';
};
mkContainersTest = makeTest {
name = "cntr-containers";
meta = with pkgs.lib.maintainers; { maintainers = [ sorki mic92 ]; };
nodes.machine = { lib, ... }: {
environment.systemPackages = [ pkgs.cntr ];
containers.test = {
autoStart = true;
privateNetwork = true;
hostAddress = "172.16.0.1";
localAddress = "172.16.0.2";
config = { };
};
};
testScript = ''
machine.start()
machine.wait_for_unit("container@test.service")
# I haven't observed the same hanging behaviour in this version as in the OCI version which necessetates this messy invocation, but it's probably better to be safe than sorry and use it here as well
machine.execute(
"(cntr attach test sh -- -c 'ping -c5 172.16.0.1'; echo $? > /tmp/exitcode; touch /tmp/done) &"
)
machine.wait_for_file("/tmp/done")
assert "0" == machine.succeed("cat /tmp/exitcode").strip(), "non-zero exit code"
'';
};
in {
nixos-container = mkContainersTest;
} // (lib.foldl' (attrs: backend: attrs // { ${backend} = mkOCITest backend; })
{ } [ "docker" "podman" ])