554 lines
24 KiB
Nix
554 lines
24 KiB
Nix
# this test creates a simple GNU image with docker tools and sees if it executes
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import ./make-test-python.nix ({ pkgs, ... }:
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let
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# nixpkgs#214434: dockerTools.buildImage fails to unpack base images
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# containing duplicate layers when those duplicate tarballs
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# appear under the manifest's 'Layers'. Docker can generate images
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# like this even though dockerTools does not.
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repeatedLayerTestImage =
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let
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# Rootfs diffs for layers 1 and 2 are identical (and empty)
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layer1 = pkgs.dockerTools.buildImage { name = "empty"; };
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layer2 = layer1.overrideAttrs (_: { fromImage = layer1; });
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repeatedRootfsDiffs = pkgs.runCommandNoCC "image-with-links.tar" {
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nativeBuildInputs = [pkgs.jq];
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} ''
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mkdir contents
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tar -xf "${layer2}" -C contents
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cd contents
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first_rootfs=$(jq -r '.[0].Layers[0]' manifest.json)
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second_rootfs=$(jq -r '.[0].Layers[1]' manifest.json)
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target_rootfs=$(sha256sum "$first_rootfs" | cut -d' ' -f 1).tar
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# Replace duplicated rootfs diffs with symlinks to one tarball
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chmod -R ug+w .
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mv "$first_rootfs" "$target_rootfs"
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rm "$second_rootfs"
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ln -s "../$target_rootfs" "$first_rootfs"
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ln -s "../$target_rootfs" "$second_rootfs"
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# Update manifest's layers to use the symlinks' target
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cat manifest.json | \
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jq ".[0].Layers[0] = \"$target_rootfs\"" |
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jq ".[0].Layers[1] = \"$target_rootfs\"" > manifest.json.new
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mv manifest.json.new manifest.json
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tar --sort=name --hard-dereference -cf $out .
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'';
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in pkgs.dockerTools.buildImage {
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fromImage = repeatedRootfsDiffs;
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name = "repeated-layer-test";
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tag = "latest";
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copyToRoot = pkgs.bash;
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# A runAsRoot script is required to force previous layers to be unpacked
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runAsRoot = ''
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echo 'runAsRoot has run.'
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'';
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};
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in {
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name = "docker-tools";
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meta = with pkgs.lib.maintainers; {
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maintainers = [ lnl7 roberth ];
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};
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nodes = {
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docker = { ... }: {
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virtualisation = {
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diskSize = 3072;
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docker.enable = true;
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};
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};
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};
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testScript = with pkgs.dockerTools; ''
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unix_time_second1 = "1970-01-01T00:00:01Z"
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docker.wait_for_unit("sockets.target")
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with subtest("includeStorePath"):
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with subtest("assumption"):
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docker.succeed("${examples.helloOnRoot} | docker load")
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docker.succeed("docker run --rm hello | grep -i hello")
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docker.succeed("docker image rm hello:latest")
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with subtest("includeStorePath = false; breaks example"):
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docker.succeed("${examples.helloOnRootNoStore} | docker load")
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docker.fail("docker run --rm hello | grep -i hello")
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docker.succeed("docker image rm hello:latest")
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with subtest("includeStorePath = false; works with mounted store"):
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docker.succeed("${examples.helloOnRootNoStore} | docker load")
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docker.succeed("docker run --rm --volume ${builtins.storeDir}:${builtins.storeDir}:ro hello | grep -i hello")
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docker.succeed("docker image rm hello:latest")
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with subtest("Ensure Docker images use a stable date by default"):
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docker.succeed(
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"docker load --input='${examples.bash}'"
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)
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assert unix_time_second1 in docker.succeed(
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"docker inspect ${examples.bash.imageName} "
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+ "| ${pkgs.jq}/bin/jq -r .[].Created",
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)
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docker.succeed("docker run --rm ${examples.bash.imageName} bash --version")
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# Check imageTag attribute matches image
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docker.succeed("docker images --format '{{.Tag}}' | grep -F '${examples.bash.imageTag}'")
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docker.succeed("docker rmi ${examples.bash.imageName}")
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# The remaining combinations
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with subtest("Ensure imageTag attribute matches image"):
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docker.succeed(
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"docker load --input='${examples.bashNoTag}'"
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)
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docker.succeed(
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"docker images --format '{{.Tag}}' | grep -F '${examples.bashNoTag.imageTag}'"
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)
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docker.succeed("docker rmi ${examples.bashNoTag.imageName}:${examples.bashNoTag.imageTag}")
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docker.succeed(
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"docker load --input='${examples.bashNoTagLayered}'"
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)
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docker.succeed(
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"docker images --format '{{.Tag}}' | grep -F '${examples.bashNoTagLayered.imageTag}'"
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)
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docker.succeed("docker rmi ${examples.bashNoTagLayered.imageName}:${examples.bashNoTagLayered.imageTag}")
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docker.succeed(
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"${examples.bashNoTagStreamLayered} | docker load"
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)
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docker.succeed(
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"docker images --format '{{.Tag}}' | grep -F '${examples.bashNoTagStreamLayered.imageTag}'"
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)
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docker.succeed(
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"docker rmi ${examples.bashNoTagStreamLayered.imageName}:${examples.bashNoTagStreamLayered.imageTag}"
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)
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docker.succeed(
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"docker load --input='${examples.nixLayered}'"
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)
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docker.succeed("docker images --format '{{.Tag}}' | grep -F '${examples.nixLayered.imageTag}'")
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docker.succeed("docker rmi ${examples.nixLayered.imageName}")
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with subtest(
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"Check if the nix store is correctly initialized by listing "
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"dependencies of the installed Nix binary"
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):
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docker.succeed(
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"docker load --input='${examples.nix}'",
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"docker run --rm ${examples.nix.imageName} nix-store -qR ${pkgs.nix}",
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"docker rmi ${examples.nix.imageName}",
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)
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with subtest(
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"Ensure (layered) nix store has correct permissions "
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"and that the container starts when its process does not have uid 0"
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):
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docker.succeed(
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"docker load --input='${examples.bashLayeredWithUser}'",
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"docker run -u somebody --rm ${examples.bashLayeredWithUser.imageName} ${pkgs.bash}/bin/bash -c 'test 555 == $(stat --format=%a /nix) && test 555 == $(stat --format=%a /nix/store)'",
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"docker rmi ${examples.bashLayeredWithUser.imageName}",
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)
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with subtest("The nix binary symlinks are intact"):
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docker.succeed(
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"docker load --input='${examples.nix}'",
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"docker run --rm ${examples.nix.imageName} ${pkgs.bash}/bin/bash -c 'test nix == $(readlink ${pkgs.nix}/bin/nix-daemon)'",
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"docker rmi ${examples.nix.imageName}",
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)
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with subtest("The nix binary symlinks are intact when the image is layered"):
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docker.succeed(
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"docker load --input='${examples.nixLayered}'",
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"docker run --rm ${examples.nixLayered.imageName} ${pkgs.bash}/bin/bash -c 'test nix == $(readlink ${pkgs.nix}/bin/nix-daemon)'",
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"docker rmi ${examples.nixLayered.imageName}",
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)
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with subtest("The pullImage tool works"):
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docker.succeed(
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"docker load --input='${examples.testNixFromDockerHub}'",
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"docker run --rm nix:2.2.1 nix-store --version",
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"docker rmi nix:2.2.1",
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)
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with subtest("runAsRoot and entry point work"):
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docker.succeed(
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"docker load --input='${examples.nginx}'",
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"docker run --name nginx -d -p 8000:80 ${examples.nginx.imageName}",
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)
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docker.wait_until_succeeds("curl -f http://localhost:8000/")
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docker.succeed(
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"docker rm --force nginx",
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"docker rmi '${examples.nginx.imageName}'",
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)
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with subtest("A pulled image can be used as base image"):
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docker.succeed(
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"docker load --input='${examples.onTopOfPulledImage}'",
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"docker run --rm ontopofpulledimage hello",
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"docker rmi ontopofpulledimage",
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)
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with subtest("Regression test for issue #34779"):
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docker.succeed(
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"docker load --input='${examples.runAsRootExtraCommands}'",
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"docker run --rm runasrootextracommands cat extraCommands",
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"docker run --rm runasrootextracommands cat runAsRoot",
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"docker rmi '${examples.runAsRootExtraCommands.imageName}'",
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)
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with subtest("Ensure Docker images can use an unstable date"):
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docker.succeed(
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"docker load --input='${examples.unstableDate}'"
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)
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assert unix_time_second1 not in docker.succeed(
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"docker inspect ${examples.unstableDate.imageName} "
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+ "| ${pkgs.jq}/bin/jq -r .[].Created"
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)
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with subtest("Ensure Layered Docker images can use an unstable date"):
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docker.succeed(
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"docker load --input='${examples.unstableDateLayered}'"
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)
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assert unix_time_second1 not in docker.succeed(
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"docker inspect ${examples.unstableDateLayered.imageName} "
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+ "| ${pkgs.jq}/bin/jq -r .[].Created"
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)
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with subtest("Ensure Layered Docker images work"):
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docker.succeed(
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"docker load --input='${examples.layered-image}'",
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"docker run --rm ${examples.layered-image.imageName}",
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"docker run --rm ${examples.layered-image.imageName} cat extraCommands",
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)
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with subtest("Ensure images built on top of layered Docker images work"):
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docker.succeed(
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"docker load --input='${examples.layered-on-top}'",
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"docker run --rm ${examples.layered-on-top.imageName}",
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)
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with subtest("Ensure layered images built on top of layered Docker images work"):
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docker.succeed(
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"docker load --input='${examples.layered-on-top-layered}'",
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"docker run --rm ${examples.layered-on-top-layered.imageName}",
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)
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def set_of_layers(image_name):
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return set(
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docker.succeed(
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f"docker inspect {image_name} "
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+ "| ${pkgs.jq}/bin/jq -r '.[] | .RootFS.Layers | .[]'"
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).split()
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)
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with subtest("Ensure layers are shared between images"):
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docker.succeed(
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"docker load --input='${examples.another-layered-image}'"
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)
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layers1 = set_of_layers("${examples.layered-image.imageName}")
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layers2 = set_of_layers("${examples.another-layered-image.imageName}")
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assert bool(layers1 & layers2)
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with subtest("Ensure order of layers is correct"):
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docker.succeed(
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"docker load --input='${examples.layersOrder}'"
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)
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for index in 1, 2, 3:
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assert f"layer{index}" in docker.succeed(
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f"docker run --rm ${examples.layersOrder.imageName} cat /tmp/layer{index}"
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)
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with subtest("Ensure layers unpacked in correct order before runAsRoot runs"):
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assert "abc" in docker.succeed(
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"docker load --input='${examples.layersUnpackOrder}'",
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"docker run --rm ${examples.layersUnpackOrder.imageName} cat /layer-order"
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)
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with subtest("Ensure repeated base layers handled by buildImage"):
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docker.succeed(
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"docker load --input='${repeatedLayerTestImage}'",
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"docker run --rm ${repeatedLayerTestImage.imageName} /bin/bash -c 'exit 0'"
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)
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with subtest("Ensure environment variables are correctly inherited"):
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docker.succeed(
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"docker load --input='${examples.environmentVariables}'"
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)
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out = docker.succeed("docker run --rm ${examples.environmentVariables.imageName} env")
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env = out.splitlines()
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assert "FROM_PARENT=true" in env, "envvars from the parent should be preserved"
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assert "FROM_CHILD=true" in env, "envvars from the child should be preserved"
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assert "LAST_LAYER=child" in env, "envvars from the child should take priority"
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with subtest("Ensure environment variables of layered images are correctly inherited"):
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docker.succeed(
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"docker load --input='${examples.environmentVariablesLayered}'"
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)
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out = docker.succeed("docker run --rm ${examples.environmentVariablesLayered.imageName} env")
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env = out.splitlines()
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assert "FROM_PARENT=true" in env, "envvars from the parent should be preserved"
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assert "FROM_CHILD=true" in env, "envvars from the child should be preserved"
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assert "LAST_LAYER=child" in env, "envvars from the child should take priority"
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with subtest(
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"Ensure inherited environment variables of layered images are correctly resolved"
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):
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# Read environment variables as stored in image config
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config = docker.succeed(
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"tar -xOf ${examples.environmentVariablesLayered} manifest.json | ${pkgs.jq}/bin/jq -r .[].Config"
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).strip()
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out = docker.succeed(
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f"tar -xOf ${examples.environmentVariablesLayered} {config} | ${pkgs.jq}/bin/jq -r '.config.Env | .[]'"
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)
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env = out.splitlines()
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assert (
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sum(entry.startswith("LAST_LAYER") for entry in env) == 1
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), "envvars overridden by child should be unique"
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with subtest("Ensure image with only 2 layers can be loaded"):
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docker.succeed(
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"docker load --input='${examples.two-layered-image}'"
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)
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with subtest(
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"Ensure the bulk layer doesn't miss store paths (regression test for #78744)"
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):
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docker.succeed(
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"docker load --input='${pkgs.dockerTools.examples.bulk-layer}'",
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# Ensure the two output paths (ls and hello) are in the layer
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"docker run bulk-layer ls /bin/hello",
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)
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with subtest(
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"Ensure the bulk layer with a base image respects the number of maxLayers"
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):
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docker.succeed(
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"docker load --input='${pkgs.dockerTools.examples.layered-bulk-layer}'",
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# Ensure the image runs correctly
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"docker run layered-bulk-layer ls /bin/hello",
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)
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# Ensure the image has the correct number of layers
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assert len(set_of_layers("layered-bulk-layer")) == 4
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with subtest("Ensure only minimal paths are added to the store"):
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# TODO: make an example that has no store paths, for example by making
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# busybox non-self-referential.
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# This check tests that buildLayeredImage can build images that don't need a store.
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docker.succeed(
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"docker load --input='${pkgs.dockerTools.examples.no-store-paths}'"
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)
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docker.succeed("docker run --rm no-store-paths ls / >/dev/console")
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# If busybox isn't self-referential, we need this line
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# docker.fail("docker run --rm no-store-paths ls /nix/store >/dev/console")
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# However, it currently is self-referential, so we check that it is the
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# only store path.
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docker.succeed("diff <(docker run --rm no-store-paths ls /nix/store) <(basename ${pkgs.pkgsStatic.busybox}) >/dev/console")
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with subtest("Ensure buildLayeredImage does not change store path contents."):
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docker.succeed(
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"docker load --input='${pkgs.dockerTools.examples.filesInStore}'",
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"docker run --rm file-in-store nix-store --verify --check-contents",
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"docker run --rm file-in-store |& grep 'some data'",
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)
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with subtest("Ensure cross compiled image can be loaded and has correct arch."):
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docker.succeed(
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"docker load --input='${pkgs.dockerTools.examples.cross}'",
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)
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assert (
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docker.succeed(
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"docker inspect ${pkgs.dockerTools.examples.cross.imageName} "
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+ "| ${pkgs.jq}/bin/jq -r .[].Architecture"
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).strip()
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== "${if pkgs.stdenv.hostPlatform.system == "aarch64-linux" then "amd64" else "arm64"}"
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)
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with subtest("buildLayeredImage doesn't dereference /nix/store symlink layers"):
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docker.succeed(
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"docker load --input='${examples.layeredStoreSymlink}'",
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"docker run --rm ${examples.layeredStoreSymlink.imageName} bash -c 'test -L ${examples.layeredStoreSymlink.passthru.symlink}'",
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"docker rmi ${examples.layeredStoreSymlink.imageName}",
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)
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with subtest("buildImage supports registry/ prefix in image name"):
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docker.succeed(
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"docker load --input='${examples.prefixedImage}'"
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)
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docker.succeed(
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"docker images --format '{{.Repository}}' | grep -F '${examples.prefixedImage.imageName}'"
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)
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with subtest("buildLayeredImage supports registry/ prefix in image name"):
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docker.succeed(
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"docker load --input='${examples.prefixedLayeredImage}'"
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)
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docker.succeed(
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"docker images --format '{{.Repository}}' | grep -F '${examples.prefixedLayeredImage.imageName}'"
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)
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with subtest("buildLayeredImage supports running chown with fakeRootCommands"):
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docker.succeed(
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"docker load --input='${examples.layeredImageWithFakeRootCommands}'"
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)
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docker.succeed(
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"docker run --rm ${examples.layeredImageWithFakeRootCommands.imageName} sh -c 'stat -c '%u' /home/alice | grep -E ^1000$'"
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)
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with subtest("Ensure docker load on merged images loads all of the constituent images"):
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docker.succeed(
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"docker load --input='${examples.mergedBashAndRedis}'"
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)
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docker.succeed(
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"docker images --format '{{.Repository}}-{{.Tag}}' | grep -F '${examples.bash.imageName}-${examples.bash.imageTag}'"
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)
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docker.succeed(
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"docker images --format '{{.Repository}}-{{.Tag}}' | grep -F '${examples.redis.imageName}-${examples.redis.imageTag}'"
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)
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docker.succeed("docker run --rm ${examples.bash.imageName} bash --version")
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docker.succeed("docker run --rm ${examples.redis.imageName} redis-cli --version")
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docker.succeed("docker rmi ${examples.bash.imageName}")
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docker.succeed("docker rmi ${examples.redis.imageName}")
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with subtest(
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"Ensure docker load on merged images loads all of the constituent images (missing tags)"
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):
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docker.succeed(
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"docker load --input='${examples.mergedBashNoTagAndRedis}'"
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)
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docker.succeed(
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"docker images --format '{{.Repository}}-{{.Tag}}' | grep -F '${examples.bashNoTag.imageName}-${examples.bashNoTag.imageTag}'"
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)
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docker.succeed(
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"docker images --format '{{.Repository}}-{{.Tag}}' | grep -F '${examples.redis.imageName}-${examples.redis.imageTag}'"
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)
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# we need to explicitly specify the generated tag here
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docker.succeed(
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"docker run --rm ${examples.bashNoTag.imageName}:${examples.bashNoTag.imageTag} bash --version"
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)
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docker.succeed("docker run --rm ${examples.redis.imageName} redis-cli --version")
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docker.succeed("docker rmi ${examples.bashNoTag.imageName}:${examples.bashNoTag.imageTag}")
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docker.succeed("docker rmi ${examples.redis.imageName}")
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with subtest("mergeImages preserves owners of the original images"):
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docker.succeed(
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"docker load --input='${examples.mergedBashFakeRoot}'"
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)
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docker.succeed(
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|
"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("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("<${examples.image-with-certs} docker load")
|
|
docker.succeed("docker run --rm image-with-certs:latest test -r /etc/ssl/certs/ca-bundle.crt")
|
|
docker.succeed("docker run --rm image-with-certs:latest test -r /etc/ssl/certs/ca-certificates.crt")
|
|
docker.succeed("docker run --rm image-with-certs:latest test -r /etc/pki/tls/certs/ca-bundle.crt")
|
|
docker.succeed("docker image rm image-with-certs:latest")
|
|
|
|
with subtest("buildNixShellImage: Can build a basic derivation"):
|
|
docker.succeed(
|
|
"${examples.nix-shell-basic} | docker load",
|
|
"docker run --rm nix-shell-basic bash -c 'buildDerivation && $out/bin/hello' | grep '^Hello, world!$'"
|
|
)
|
|
|
|
with subtest("buildNixShellImage: Runs the shell hook"):
|
|
docker.succeed(
|
|
"${examples.nix-shell-hook} | docker load",
|
|
"docker run --rm -it nix-shell-hook | grep 'This is the shell hook!'"
|
|
)
|
|
|
|
with subtest("buildNixShellImage: Sources stdenv, making build inputs available"):
|
|
docker.succeed(
|
|
"${examples.nix-shell-inputs} | docker load",
|
|
"docker run --rm -it nix-shell-inputs | grep 'Hello, world!'"
|
|
)
|
|
|
|
with subtest("buildNixShellImage: passAsFile works"):
|
|
docker.succeed(
|
|
"${examples.nix-shell-pass-as-file} | docker load",
|
|
"docker run --rm -it nix-shell-pass-as-file | grep 'this is a string'"
|
|
)
|
|
|
|
with subtest("buildNixShellImage: run argument works"):
|
|
docker.succeed(
|
|
"${examples.nix-shell-run} | docker load",
|
|
"docker run --rm -it nix-shell-run | grep 'This shell is not interactive'"
|
|
)
|
|
|
|
with subtest("buildNixShellImage: command argument works"):
|
|
docker.succeed(
|
|
"${examples.nix-shell-command} | docker load",
|
|
"docker run --rm -it nix-shell-command | grep 'This shell is interactive'"
|
|
)
|
|
|
|
with subtest("buildNixShellImage: home directory is writable by default"):
|
|
docker.succeed(
|
|
"${examples.nix-shell-writable-home} | docker load",
|
|
"docker run --rm -it nix-shell-writable-home"
|
|
)
|
|
|
|
with subtest("buildNixShellImage: home directory can be made non-existent"):
|
|
docker.succeed(
|
|
"${examples.nix-shell-nonexistent-home} | docker load",
|
|
"docker run --rm -it nix-shell-nonexistent-home"
|
|
)
|
|
|
|
with subtest("buildNixShellImage: can build derivations"):
|
|
docker.succeed(
|
|
"${examples.nix-shell-build-derivation} | docker load",
|
|
"docker run --rm -it nix-shell-build-derivation"
|
|
)
|
|
'';
|
|
})
|