nixpkgs/nixos/tests/docker-tools.nix
Silvan Mosberger 4f0dadbf38 treewide: format all inactive Nix files
After final improvements to the official formatter implementation,
this commit now performs the first treewide reformat of Nix files using it.
This is part of the implementation of RFC 166.

Only "inactive" files are reformatted, meaning only files that
aren't being touched by any PR with activity in the past 2 months.
This is to avoid conflicts for PRs that might soon be merged.
Later we can do a full treewide reformat to get the rest,
which should not cause as many conflicts.

A CI check has already been running for some time to ensure that new and
already-formatted files are formatted, so the files being reformatted here
should also stay formatted.

This commit was automatically created and can be verified using

    nix-build a08b3a4d19.tar.gz \
      --argstr baseRev b32a094368
    result/bin/apply-formatting $NIXPKGS_PATH
2024-12-10 20:26:33 +01:00

605 lines
26 KiB
Nix

# this test creates a simple GNU image with docker tools and sees if it executes
import ./make-test-python.nix (
{ pkgs, ... }:
let
# nixpkgs#214434: dockerTools.buildImage fails to unpack base images
# containing duplicate layers when those duplicate tarballs
# appear under the manifest's 'Layers'. Docker can generate images
# like this even though dockerTools does not.
repeatedLayerTestImage =
let
# Rootfs diffs for layers 1 and 2 are identical (and empty)
layer1 = pkgs.dockerTools.buildImage { name = "empty"; };
layer2 = layer1.overrideAttrs (_: {
fromImage = layer1;
});
repeatedRootfsDiffs =
pkgs.runCommand "image-with-links.tar"
{
nativeBuildInputs = [ pkgs.jq ];
}
''
mkdir contents
tar -xf "${layer2}" -C contents
cd contents
first_rootfs=$(jq -r '.[0].Layers[0]' manifest.json)
second_rootfs=$(jq -r '.[0].Layers[1]' manifest.json)
target_rootfs=$(sha256sum "$first_rootfs" | cut -d' ' -f 1).tar
# Replace duplicated rootfs diffs with symlinks to one tarball
chmod -R ug+w .
mv "$first_rootfs" "$target_rootfs"
rm "$second_rootfs"
ln -s "../$target_rootfs" "$first_rootfs"
ln -s "../$target_rootfs" "$second_rootfs"
# Update manifest's layers to use the symlinks' target
cat manifest.json | \
jq ".[0].Layers[0] = \"$target_rootfs\"" |
jq ".[0].Layers[1] = \"$target_rootfs\"" > manifest.json.new
mv manifest.json.new manifest.json
tar --sort=name --hard-dereference -cf $out .
'';
in
pkgs.dockerTools.buildImage {
fromImage = repeatedRootfsDiffs;
name = "repeated-layer-test";
tag = "latest";
copyToRoot = pkgs.bash;
# A runAsRoot script is required to force previous layers to be unpacked
runAsRoot = ''
echo 'runAsRoot has run.'
'';
};
chownTestImage = pkgs.dockerTools.streamLayeredImage {
name = "chown-test";
tag = "latest";
enableFakechroot = true;
fakeRootCommands = ''
touch /testfile
chown 12345:12345 /testfile
'';
config.Cmd = [
"${pkgs.coreutils}/bin/stat"
"-c"
"%u:%g"
"/testfile"
];
};
nonRootTestImage = pkgs.dockerTools.streamLayeredImage {
name = "non-root-test";
tag = "latest";
uid = 1000;
gid = 1000;
uname = "user";
gname = "user";
config = {
User = "user";
Cmd = [
"${pkgs.coreutils}/bin/stat"
"-c"
"%u:%g"
"${pkgs.coreutils}/bin/stat"
];
};
};
in
{
name = "docker-tools";
meta = with pkgs.lib.maintainers; {
maintainers = [
lnl7
roberth
];
};
nodes = {
docker =
{ ... }:
{
virtualisation = {
diskSize = 3072;
docker.enable = true;
};
};
};
testScript = with pkgs.dockerTools; ''
unix_time_second1 = "1970-01-01T00:00:01Z"
docker.wait_for_unit("sockets.target")
with subtest("includeStorePath"):
with subtest("assumption"):
docker.succeed("${examples.helloOnRoot} | docker load")
docker.succeed("docker run --rm hello | grep -i hello")
docker.succeed("docker image rm hello:latest")
with subtest("includeStorePath = false; breaks example"):
docker.succeed("${examples.helloOnRootNoStore} | docker load")
docker.fail("docker run --rm hello | grep -i hello")
docker.succeed("docker image rm hello:latest")
with subtest("includeStorePath = false; breaks example (fakechroot)"):
docker.succeed("${examples.helloOnRootNoStoreFakechroot} | docker load")
docker.fail("docker run --rm hello | grep -i hello")
docker.succeed("docker image rm hello:latest")
with subtest("Ensure ZERO paths are added to the store"):
docker.fail("${examples.helloOnRootNoStore} | ${pkgs.crane}/bin/crane export - - | tar t | grep 'nix/store/'")
with subtest("Ensure ZERO paths are added to the store (fakechroot)"):
docker.fail("${examples.helloOnRootNoStoreFakechroot} | ${pkgs.crane}/bin/crane export - - | tar t | grep 'nix/store/'")
with subtest("includeStorePath = false; works with mounted store"):
docker.succeed("${examples.helloOnRootNoStore} | docker load")
docker.succeed("docker run --rm --volume ${builtins.storeDir}:${builtins.storeDir}:ro hello | grep -i hello")
docker.succeed("docker image rm hello:latest")
with subtest("includeStorePath = false; works with mounted store (fakechroot)"):
docker.succeed("${examples.helloOnRootNoStoreFakechroot} | docker load")
docker.succeed("docker run --rm --volume ${builtins.storeDir}:${builtins.storeDir}:ro hello | grep -i hello")
docker.succeed("docker image rm hello:latest")
with subtest("Ensure Docker images use a stable date by default"):
docker.succeed(
"docker load --input='${examples.bash}'"
)
assert unix_time_second1 in docker.succeed(
"docker inspect ${examples.bash.imageName} "
+ "| ${pkgs.jq}/bin/jq -r .[].Created",
)
docker.succeed("docker run --rm ${examples.bash.imageName} bash --version")
# Check imageTag attribute matches image
docker.succeed("docker images --format '{{.Tag}}' | grep -F '${examples.bash.imageTag}'")
docker.succeed("docker rmi ${examples.bash.imageName}")
# The remaining combinations
with subtest("Ensure imageTag attribute matches image"):
docker.succeed(
"docker load --input='${examples.bashNoTag}'"
)
docker.succeed(
"docker images --format '{{.Tag}}' | grep -F '${examples.bashNoTag.imageTag}'"
)
docker.succeed("docker rmi ${examples.bashNoTag.imageName}:${examples.bashNoTag.imageTag}")
docker.succeed(
"docker load --input='${examples.bashNoTagLayered}'"
)
docker.succeed(
"docker images --format '{{.Tag}}' | grep -F '${examples.bashNoTagLayered.imageTag}'"
)
docker.succeed("docker rmi ${examples.bashNoTagLayered.imageName}:${examples.bashNoTagLayered.imageTag}")
docker.succeed(
"${examples.bashNoTagStreamLayered} | docker load"
)
docker.succeed(
"docker images --format '{{.Tag}}' | grep -F '${examples.bashNoTagStreamLayered.imageTag}'"
)
docker.succeed(
"docker rmi ${examples.bashNoTagStreamLayered.imageName}:${examples.bashNoTagStreamLayered.imageTag}"
)
docker.succeed(
"docker load --input='${examples.nixLayered}'"
)
docker.succeed("docker images --format '{{.Tag}}' | grep -F '${examples.nixLayered.imageTag}'")
docker.succeed("docker rmi ${examples.nixLayered.imageName}")
with subtest("Check that images with alternative compression schemas load"):
docker.succeed(
"docker load --input='${examples.bashZstdCompressed}'",
"docker rmi ${examples.bashZstdCompressed.imageName}",
)
docker.succeed(
"docker load --input='${examples.bashUncompressed}'",
"docker rmi ${examples.bashUncompressed.imageName}",
)
docker.succeed(
"docker load --input='${examples.bashLayeredUncompressed}'",
"docker rmi ${examples.bashLayeredUncompressed.imageName}",
)
docker.succeed(
"docker load --input='${examples.bashLayeredZstdCompressed}'",
"docker rmi ${examples.bashLayeredZstdCompressed.imageName}",
)
with subtest(
"Check if the nix store is correctly initialized by listing "
"dependencies of the installed Nix binary"
):
docker.succeed(
"docker load --input='${examples.nix}'",
"docker run --rm ${examples.nix.imageName} nix-store -qR ${pkgs.nix}",
"docker rmi ${examples.nix.imageName}",
)
with subtest(
"Ensure (layered) nix store has correct permissions "
"and that the container starts when its process does not have uid 0"
):
docker.succeed(
"docker load --input='${examples.bashLayeredWithUser}'",
"docker run -u somebody --rm ${examples.bashLayeredWithUser.imageName} ${pkgs.bash}/bin/bash -c 'test 755 == $(stat --format=%a /nix) && test 755 == $(stat --format=%a /nix/store)'",
"docker rmi ${examples.bashLayeredWithUser.imageName}",
)
with subtest("The nix binary symlinks are intact"):
docker.succeed(
"docker load --input='${examples.nix}'",
"docker run --rm ${examples.nix.imageName} ${pkgs.bash}/bin/bash -c 'test nix == $(readlink ${pkgs.nix}/bin/nix-daemon)'",
"docker rmi ${examples.nix.imageName}",
)
with subtest("The nix binary symlinks are intact when the image is layered"):
docker.succeed(
"docker load --input='${examples.nixLayered}'",
"docker run --rm ${examples.nixLayered.imageName} ${pkgs.bash}/bin/bash -c 'test nix == $(readlink ${pkgs.nix}/bin/nix-daemon)'",
"docker rmi ${examples.nixLayered.imageName}",
)
with subtest("The pullImage tool works"):
docker.succeed(
"docker load --input='${examples.testNixFromDockerHub}'",
"docker run --rm nix:2.2.1 nix-store --version",
"docker rmi nix:2.2.1",
)
with subtest("runAsRoot and entry point work"):
docker.succeed(
"docker load --input='${examples.nginx}'",
"docker run --name nginx -d -p 8000:80 ${examples.nginx.imageName}",
)
docker.wait_until_succeeds("curl -f http://localhost:8000/")
docker.succeed(
"docker rm --force nginx",
"docker rmi '${examples.nginx.imageName}'",
)
with subtest("A pulled image can be used as base image"):
docker.succeed(
"docker load --input='${examples.onTopOfPulledImage}'",
"docker run --rm ontopofpulledimage hello",
"docker rmi ontopofpulledimage",
)
with subtest("Regression test for issue #34779"):
docker.succeed(
"docker load --input='${examples.runAsRootExtraCommands}'",
"docker run --rm runasrootextracommands cat extraCommands",
"docker run --rm runasrootextracommands cat runAsRoot",
"docker rmi '${examples.runAsRootExtraCommands.imageName}'",
)
with subtest("Ensure Docker images can use an unstable date"):
docker.succeed(
"docker load --input='${examples.unstableDate}'"
)
assert unix_time_second1 not in docker.succeed(
"docker inspect ${examples.unstableDate.imageName} "
+ "| ${pkgs.jq}/bin/jq -r .[].Created"
)
with subtest("Ensure Layered Docker images can use an unstable date"):
docker.succeed(
"docker load --input='${examples.unstableDateLayered}'"
)
assert unix_time_second1 not in docker.succeed(
"docker inspect ${examples.unstableDateLayered.imageName} "
+ "| ${pkgs.jq}/bin/jq -r .[].Created"
)
with subtest("Ensure Layered Docker images work"):
docker.succeed(
"docker load --input='${examples.layered-image}'",
"docker run --rm ${examples.layered-image.imageName}",
"docker run --rm ${examples.layered-image.imageName} cat extraCommands",
)
with subtest("Ensure images built on top of layered Docker images work"):
docker.succeed(
"docker load --input='${examples.layered-on-top}'",
"docker run --rm ${examples.layered-on-top.imageName}",
)
with subtest("Ensure layered images built on top of layered Docker images work"):
docker.succeed(
"docker load --input='${examples.layered-on-top-layered}'",
"docker run --rm ${examples.layered-on-top-layered.imageName}",
)
def set_of_layers(image_name):
return set(
docker.succeed(
f"docker inspect {image_name} "
+ "| ${pkgs.jq}/bin/jq -r '.[] | .RootFS.Layers | .[]'"
).split()
)
with subtest("Ensure layers are shared between images"):
docker.succeed(
"docker load --input='${examples.another-layered-image}'"
)
layers1 = set_of_layers("${examples.layered-image.imageName}")
layers2 = set_of_layers("${examples.another-layered-image.imageName}")
assert bool(layers1 & layers2)
with subtest("Ensure order of layers is correct"):
docker.succeed(
"docker load --input='${examples.layersOrder}'"
)
for index in 1, 2, 3:
assert f"layer{index}" in docker.succeed(
f"docker run --rm ${examples.layersOrder.imageName} cat /tmp/layer{index}"
)
with subtest("Ensure layers unpacked in correct order before runAsRoot runs"):
assert "abc" in docker.succeed(
"docker load --input='${examples.layersUnpackOrder}'",
"docker run --rm ${examples.layersUnpackOrder.imageName} cat /layer-order"
)
with subtest("Ensure repeated base layers handled by buildImage"):
docker.succeed(
"docker load --input='${repeatedLayerTestImage}'",
"docker run --rm ${repeatedLayerTestImage.imageName} /bin/bash -c 'exit 0'"
)
with subtest("Ensure environment variables are correctly inherited"):
docker.succeed(
"docker load --input='${examples.environmentVariables}'"
)
out = docker.succeed("docker run --rm ${examples.environmentVariables.imageName} env")
env = out.splitlines()
assert "FROM_PARENT=true" in env, "envvars from the parent should be preserved"
assert "FROM_CHILD=true" in env, "envvars from the child should be preserved"
assert "LAST_LAYER=child" in env, "envvars from the child should take priority"
with subtest("Ensure environment variables of layered images are correctly inherited"):
docker.succeed(
"docker load --input='${examples.environmentVariablesLayered}'"
)
out = docker.succeed("docker run --rm ${examples.environmentVariablesLayered.imageName} env")
env = out.splitlines()
assert "FROM_PARENT=true" in env, "envvars from the parent should be preserved"
assert "FROM_CHILD=true" in env, "envvars from the child should be preserved"
assert "LAST_LAYER=child" in env, "envvars from the child should take priority"
with subtest(
"Ensure inherited environment variables of layered images are correctly resolved"
):
# Read environment variables as stored in image config
config = docker.succeed(
"tar -xOf ${examples.environmentVariablesLayered} manifest.json | ${pkgs.jq}/bin/jq -r .[].Config"
).strip()
out = docker.succeed(
f"tar -xOf ${examples.environmentVariablesLayered} {config} | ${pkgs.jq}/bin/jq -r '.config.Env | .[]'"
)
env = out.splitlines()
assert (
sum(entry.startswith("LAST_LAYER") for entry in env) == 1
), "envvars overridden by child should be unique"
with subtest("Ensure image with only 2 layers can be loaded"):
docker.succeed(
"docker load --input='${examples.two-layered-image}'"
)
with subtest(
"Ensure the bulk layer doesn't miss store paths (regression test for #78744)"
):
docker.succeed(
"docker load --input='${pkgs.dockerTools.examples.bulk-layer}'",
# Ensure the two output paths (ls and hello) are in the layer
"docker run bulk-layer ls /bin/hello",
)
with subtest(
"Ensure the bulk layer with a base image respects the number of maxLayers"
):
docker.succeed(
"docker load --input='${pkgs.dockerTools.examples.layered-bulk-layer}'",
# Ensure the image runs correctly
"docker run layered-bulk-layer ls /bin/hello",
)
# Ensure the image has the correct number of layers
assert len(set_of_layers("layered-bulk-layer")) == 4
with subtest("Ensure only minimal paths are added to the store"):
# TODO: make an example that has no store paths, for example by making
# busybox non-self-referential.
# This check tests that buildLayeredImage can build images that don't need a store.
docker.succeed(
"docker load --input='${pkgs.dockerTools.examples.no-store-paths}'"
)
docker.succeed("docker run --rm no-store-paths ls / >/dev/console")
# If busybox isn't self-referential, we need this line
# docker.fail("docker run --rm no-store-paths ls /nix/store >/dev/console")
# However, it currently is self-referential, so we check that it is the
# only store path.
docker.succeed("diff <(docker run --rm no-store-paths ls /nix/store) <(basename ${pkgs.pkgsStatic.busybox}) >/dev/console")
with subtest("Ensure buildLayeredImage does not change store path contents."):
docker.succeed(
"docker load --input='${pkgs.dockerTools.examples.filesInStore}'",
"docker run --rm file-in-store nix-store --verify --check-contents",
"docker run --rm file-in-store |& grep 'some data'",
)
with subtest("Ensure cross compiled image can be loaded and has correct arch."):
docker.succeed(
"docker load --input='${pkgs.dockerTools.examples.cross}'",
)
assert (
docker.succeed(
"docker inspect ${pkgs.dockerTools.examples.cross.imageName} "
+ "| ${pkgs.jq}/bin/jq -r .[].Architecture"
).strip()
== "${if pkgs.stdenv.hostPlatform.system == "aarch64-linux" then "amd64" else "arm64"}"
)
with subtest("buildLayeredImage doesn't dereference /nix/store symlink layers"):
docker.succeed(
"docker load --input='${examples.layeredStoreSymlink}'",
"docker run --rm ${examples.layeredStoreSymlink.imageName} bash -c 'test -L ${examples.layeredStoreSymlink.passthru.symlink}'",
"docker rmi ${examples.layeredStoreSymlink.imageName}",
)
with subtest("buildImage supports registry/ prefix in image name"):
docker.succeed(
"docker load --input='${examples.prefixedImage}'"
)
docker.succeed(
"docker images --format '{{.Repository}}' | grep -F '${examples.prefixedImage.imageName}'"
)
with subtest("buildLayeredImage supports registry/ prefix in image name"):
docker.succeed(
"docker load --input='${examples.prefixedLayeredImage}'"
)
docker.succeed(
"docker images --format '{{.Repository}}' | grep -F '${examples.prefixedLayeredImage.imageName}'"
)
with subtest("buildLayeredImage supports running chown with fakeRootCommands"):
docker.succeed(
"docker load --input='${examples.layeredImageWithFakeRootCommands}'"
)
docker.succeed(
"docker run --rm ${examples.layeredImageWithFakeRootCommands.imageName} sh -c 'stat -c '%u' /home/alice | grep -E ^1000$'"
)
with subtest("Ensure docker load on merged images loads all of the constituent images"):
docker.succeed(
"docker load --input='${examples.mergedBashAndRedis}'"
)
docker.succeed(
"docker images --format '{{.Repository}}-{{.Tag}}' | grep -F '${examples.bash.imageName}-${examples.bash.imageTag}'"
)
docker.succeed(
"docker images --format '{{.Repository}}-{{.Tag}}' | grep -F '${examples.redis.imageName}-${examples.redis.imageTag}'"
)
docker.succeed("docker run --rm ${examples.bash.imageName} bash --version")
docker.succeed("docker run --rm ${examples.redis.imageName} redis-cli --version")
docker.succeed("docker rmi ${examples.bash.imageName}")
docker.succeed("docker rmi ${examples.redis.imageName}")
with subtest(
"Ensure docker load on merged images loads all of the constituent images (missing tags)"
):
docker.succeed(
"docker load --input='${examples.mergedBashNoTagAndRedis}'"
)
docker.succeed(
"docker images --format '{{.Repository}}-{{.Tag}}' | grep -F '${examples.bashNoTag.imageName}-${examples.bashNoTag.imageTag}'"
)
docker.succeed(
"docker images --format '{{.Repository}}-{{.Tag}}' | grep -F '${examples.redis.imageName}-${examples.redis.imageTag}'"
)
# we need to explicitly specify the generated tag here
docker.succeed(
"docker run --rm ${examples.bashNoTag.imageName}:${examples.bashNoTag.imageTag} bash --version"
)
docker.succeed("docker run --rm ${examples.redis.imageName} redis-cli --version")
docker.succeed("docker rmi ${examples.bashNoTag.imageName}:${examples.bashNoTag.imageTag}")
docker.succeed("docker rmi ${examples.redis.imageName}")
with subtest("mergeImages preserves owners of the original images"):
docker.succeed(
"docker load --input='${examples.mergedBashFakeRoot}'"
)
docker.succeed(
"docker run --rm ${examples.layeredImageWithFakeRootCommands.imageName} sh -c 'stat -c '%u' /home/alice | grep -E ^1000$'"
)
with subtest("The image contains store paths referenced by the fakeRootCommands output"):
docker.succeed(
"docker run --rm ${examples.layeredImageWithFakeRootCommands.imageName} /hello/bin/layeredImageWithFakeRootCommands-hello"
)
with subtest("mergeImage correctly deals with varying compression schemas in inputs"):
docker.succeed("docker load --input='${examples.mergeVaryingCompressor}'")
for sub_image, tag in [
("${examples.redis.imageName}", "${examples.redis.imageTag}"),
("${examples.bashUncompressed.imageName}", "${examples.bashUncompressed.imageTag}"),
("${examples.bashZstdCompressed.imageName}", "${examples.bashZstdCompressed.imageTag}"),
]:
docker.succeed(f"docker images --format '{{{{.Repository}}}}-{{{{.Tag}}}}' | grep -F '{sub_image}-{tag}'")
docker.succeed(f"docker rmi {sub_image}")
with subtest("exportImage produces a valid tarball"):
docker.succeed(
"tar -tf ${examples.exportBash} | grep '\./bin/bash' > /dev/null"
)
with subtest("layered image fakeRootCommands with fakechroot works"):
docker.succeed("${examples.imageViaFakeChroot} | docker load")
docker.succeed("docker run --rm image-via-fake-chroot | grep -i hello")
docker.succeed("docker image rm image-via-fake-chroot:latest")
with subtest("Ensure bare paths in contents are loaded correctly"):
docker.succeed(
"docker load --input='${examples.build-image-with-path}'",
"docker run --rm build-image-with-path bash -c '[[ -e /hello.txt ]]'",
"docker rmi build-image-with-path",
)
docker.succeed(
"${examples.layered-image-with-path} | docker load",
"docker run --rm layered-image-with-path bash -c '[[ -e /hello.txt ]]'",
"docker rmi layered-image-with-path",
)
with subtest("Ensure correct architecture is present in manifests."):
docker.succeed("""
docker load --input='${examples.build-image-with-architecture}'
docker inspect build-image-with-architecture \
| ${pkgs.jq}/bin/jq -er '.[] | select(.Architecture=="arm64").Architecture'
docker rmi build-image-with-architecture
""")
docker.succeed("""
${examples.layered-image-with-architecture} | docker load
docker inspect layered-image-with-architecture \
| ${pkgs.jq}/bin/jq -er '.[] | select(.Architecture=="arm64").Architecture'
docker rmi layered-image-with-architecture
""")
with subtest("etc"):
docker.succeed("${examples.etc} | docker load")
docker.succeed("docker run --rm etc | grep localhost")
docker.succeed("docker image rm etc:latest")
with subtest("image-with-certs"):
docker.succeed("<${examples.image-with-certs} docker load")
docker.succeed("docker run --rm image-with-certs:latest test -r /etc/ssl/certs/ca-bundle.crt")
docker.succeed("docker run --rm image-with-certs:latest test -r /etc/ssl/certs/ca-certificates.crt")
docker.succeed("docker run --rm image-with-certs:latest test -r /etc/pki/tls/certs/ca-bundle.crt")
docker.succeed("docker image rm image-with-certs:latest")
with subtest("streamLayeredImage: chown is persistent in fakeRootCommands"):
docker.succeed(
"${chownTestImage} | docker load",
"docker run --rm ${chownTestImage.imageName} | diff /dev/stdin <(echo 12345:12345)"
)
with subtest("streamLayeredImage: with non-root user"):
docker.succeed(
"${nonRootTestImage} | docker load",
"docker run --rm ${chownTestImage.imageName} | diff /dev/stdin <(echo 12345:12345)"
)
'';
}
)