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moby--moby/integration-cli/docker_cli_export_import_test.go

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package main
import (
"fmt"
"os"
"os/exec"
"testing"
)
// export an image and try to import it into a new one
func TestExportContainerAndImportImage(t *testing.T) {
runCmd := exec.Command(dockerBinary, "run", "-d", "busybox", "true")
out, _, err := runCommandWithOutput(runCmd)
if err != nil {
t.Fatal("failed to create a container", out, err)
}
cleanedContainerID := stripTrailingCharacters(out)
inspectCmd := exec.Command(dockerBinary, "inspect", cleanedContainerID)
out, _, err = runCommandWithOutput(inspectCmd)
if err != nil {
t.Fatalf("output should've been a container id: %s %s ", cleanedContainerID, err)
}
exportCmdTemplate := `%v export %v > /tmp/testexp.tar`
exportCmdFinal := fmt.Sprintf(exportCmdTemplate, dockerBinary, cleanedContainerID)
exportCmd := exec.Command("bash", "-c", exportCmdFinal)
out, _, err = runCommandWithOutput(exportCmd)
errorOut(err, t, fmt.Sprintf("failed to export container: %v %v", out, err))
importCmdFinal := `cat /tmp/testexp.tar | docker import - testexp`
importCmd := exec.Command("bash", "-c", importCmdFinal)
out, _, err = runCommandWithOutput(importCmd)
errorOut(err, t, fmt.Sprintf("failed to import image: %v %v", out, err))
cleanedImageID := stripTrailingCharacters(out)
inspectCmd = exec.Command(dockerBinary, "inspect", cleanedImageID)
out, _, err = runCommandWithOutput(inspectCmd)
errorOut(err, t, fmt.Sprintf("output should've been an image id: %v %v", out, err))
deleteContainer(cleanedContainerID)
deleteImages("testexp")
os.Remove("/tmp/testexp.tar")
logDone("export - export a container")
logDone("import - import an image")
}