diff options
Diffstat (limited to 'pkgs/build-support')
| -rw-r--r-- | pkgs/build-support/docker/default.nix | 21 | ||||
| -rw-r--r-- | pkgs/build-support/docker/examples.nix | 39 |
2 files changed, 50 insertions, 10 deletions
diff --git a/pkgs/build-support/docker/default.nix b/pkgs/build-support/docker/default.nix index 11945e7b6f7..57e40069003 100644 --- a/pkgs/build-support/docker/default.nix +++ b/pkgs/build-support/docker/default.nix @@ -216,7 +216,7 @@ rec { find image/$extractionID/layer -name ".wh.*" -exec bash -c 'name="$(basename {}|sed "s/^.wh.//")"; mknod "$(dirname {})/$name" c 0 0; rm {}' \; # Get the next lower directory and continue the loop. - lowerdir=$lowerdir''${lowerdir:+:}image/$extractionID/layer + lowerdir=image/$extractionID/layer''${lowerdir:+:}$lowerdir done mkdir work @@ -585,9 +585,9 @@ rec { layerID=$(sha256sum "$layer/json" | cut -d ' ' -f 1) ln -s "$layer" "./image/$layerID" - manifestJson=$(echo "$manifestJson" | jq ".[0].Layers |= [\"$layerID/layer.tar\"] + .") - imageJson=$(echo "$imageJson" | jq ".history |= [{\"created\": \"$(jq -r .created ${configJson})\"}] + .") - imageJson=$(echo "$imageJson" | jq ".rootfs.diff_ids |= [\"sha256:$layerChecksum\"] + .") + manifestJson=$(echo "$manifestJson" | jq ".[0].Layers |= . + [\"$layerID/layer.tar\"]") + imageJson=$(echo "$imageJson" | jq ".history |= . + [{\"created\": \"$(jq -r .created ${configJson})\"}]") + imageJson=$(echo "$imageJson" | jq ".rootfs.diff_ids |= . + [\"sha256:$layerChecksum\"]") done imageJsonChecksum=$(echo "$imageJson" | sha256sum | cut -d ' ' -f1) echo "$imageJson" > "image/$imageJsonChecksum.json" @@ -779,23 +779,24 @@ rec { # Use the temp folder we've been working on to create a new image. mv temp image/$layerID - # Add the new layer ID to the beginning of the layer list + # Add the new layer ID to the end of the layer list ( + cat layer-list # originally this used `sed -i "1i$layerID" layer-list`, but # would fail if layer-list was completely empty. echo "$layerID/layer.tar" - cat layer-list ) | ${pkgs.moreutils}/bin/sponge layer-list # Create image json and image manifest imageJson=$(cat ${baseJson} | jq ". + {\"rootfs\": {\"diff_ids\": [], \"type\": \"layers\"}}") manifestJson=$(jq -n "[{\"RepoTags\":[\"$imageName:$imageTag\"]}]") - for layerTar in $(tac ./layer-list); do + for layerTar in $(cat ./layer-list); do layerChecksum=$(sha256sum image/$layerTar | cut -d ' ' -f1) - imageJson=$(echo "$imageJson" | jq ".history |= [{\"created\": \"$(jq -r .created ${baseJson})\"}] + .") - imageJson=$(echo "$imageJson" | jq ".rootfs.diff_ids |= [\"sha256:$layerChecksum\"] + .") - manifestJson=$(echo "$manifestJson" | jq ".[0].Layers |= [\"$layerTar\"] + .") + imageJson=$(echo "$imageJson" | jq ".history |= . + [{\"created\": \"$(jq -r .created ${baseJson})\"}]") + # diff_ids order is from the bottom-most to top-most layer + imageJson=$(echo "$imageJson" | jq ".rootfs.diff_ids |= . + [\"sha256:$layerChecksum\"]") + manifestJson=$(echo "$manifestJson" | jq ".[0].Layers |= . + [\"$layerTar\"]") done imageJsonChecksum=$(echo "$imageJson" | sha256sum | cut -d ' ' -f1) diff --git a/pkgs/build-support/docker/examples.nix b/pkgs/build-support/docker/examples.nix index 557a4dbf54b..ac21be907b8 100644 --- a/pkgs/build-support/docker/examples.nix +++ b/pkgs/build-support/docker/examples.nix @@ -187,4 +187,43 @@ rec { runAsRoot = "touch /example-file"; fromImage = bash; }; + + # 13. example of 3 layers images This image is used to verify the + # order of layers is correct. + # It allows to validate + # - the layer of parent are below + # - the order of parent layer is preserved at image build time + # (this is why there are 3 images) + layersOrder = let + l1 = pkgs.dockerTools.buildImage { + name = "l1"; + tag = "latest"; + extraCommands = '' + mkdir -p tmp + echo layer1 > tmp/layer1 + echo layer1 > tmp/layer2 + echo layer1 > tmp/layer3 + ''; + }; + l2 = pkgs.dockerTools.buildImage { + name = "l2"; + fromImage = l1; + tag = "latest"; + extraCommands = '' + mkdir -p tmp + echo layer2 > tmp/layer2 + echo layer2 > tmp/layer3 + ''; + }; + in pkgs.dockerTools.buildImage { + name = "l3"; + fromImage = l2; + tag = "latest"; + contents = [ pkgs.coreutils ]; + extraCommands = '' + mkdir -p tmp + echo layer3 > tmp/layer3 + ''; + }; + } |