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fix: do not retag images unnecessarily

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This change minimizes the work needed to be done when tagging images. It edits the image manifest directly only when necessary, allowing restarts of an app to avoid having an extra layer.

This also additionally allows to deploy images with ONBUILD directives without running the ONBUILD directives.

Lastly, users building docker images that run Dokku will need to use a new sudoer wrapper for the `docker-image-labeler` binary to work correctly. A reference version has been placed in the `docker` skeleton directory.

Closes #3931
Refs #4226
This commit is contained in:
Jose Diaz-Gonzalez
2021-01-23 23:00:22 -05:00
parent 162abcee4f
commit 9306011f70
11 changed files with 107 additions and 22 deletions
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56
tests/unit/tags.bats
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@@ -95,7 +95,59 @@ teardown() {
run /bin/bash -c "dokku tags:deploy $TEST_APP 3.2.13"
echo "output: $output"
echo "status: $status"
assert_output_contains "Image contains one or more ONBUILD directives, skipping label injection"
assert_output_contains "COPY failed" 0
assert_success
}
@test "(tags) deploy and restart inject no extra layers" {
run /bin/bash -c "docker image pull linuxserver/foldingathome:7.5.1-ls1"
echo "output: $output"
echo "status: $status"
assert_success
run /bin/bash -c "docker inspect linuxserver/foldingathome:7.5.1-ls1 | jq -r '.[0].RootFS.Layers | length'"
echo "output: $output"
echo "status: $status"
assert_success
assert_output "6"
layer_count="$output"
run /bin/bash -c "docker image tag linuxserver/foldingathome:7.5.1-ls1 dokku/$TEST_APP:latest"
echo "output: $output"
echo "status: $status"
assert_success
run /bin/bash -c "docker inspect dokku/$TEST_APP:latest | jq -r '.[0].RootFS.Layers | length'"
echo "output: $output"
echo "status: $status"
assert_success
assert_output "6"
layer_count="$output"
run /bin/bash -c "dokku tags:deploy $TEST_APP latest"
echo "output: $output"
echo "status: $status"
assert_success
run /bin/bash -c "docker inspect dokku/$TEST_APP:latest | jq -r '.[0].RootFS.Layers | length'"
echo "output: $output"
echo "status: $status"
assert_success
assert_output "$layer_count"
run /bin/bash -c "dokku ps:restart $TEST_APP"
echo "output: $output"
echo "status: $status"
assert_success
run /bin/bash -c "docker inspect dokku/$TEST_APP:latest | jq -r '.[0].RootFS.Layers | length'"
echo "output: $output"
echo "status: $status"
assert_success
assert_output "$layer_count"
run /bin/bash -c "docker inspect linuxserver/foldingathome:7.5.1-ls1 | jq -r '.[0].RootFS.Layers | length'"
echo "output: $output"
echo "status: $status"
assert_success
assert_output "$layer_count"
}