77 lines
2.0 KiB
Go
77 lines
2.0 KiB
Go
package docker
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import (
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"context"
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"fmt"
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"os/exec"
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"strings"
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"github.com/hashicorp/packer/helper/multistep"
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)
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type StepConnectDocker struct{}
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func (s *StepConnectDocker) Run(ctx context.Context, state multistep.StateBag) multistep.StepAction {
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config := state.Get("config").(*Config)
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containerId := state.Get("container_id").(string)
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driver := state.Get("driver").(Driver)
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tempDir := state.Get("temp_dir").(string)
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// Get the version so we can pass it to the communicator
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version, err := driver.Version()
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if err != nil {
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state.Put("error", err)
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return multistep.ActionHalt
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}
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containerUser, err := getContainerUser(containerId)
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if err != nil {
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state.Put("error", err)
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return multistep.ActionHalt
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}
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// Create the communicator that talks to Docker via various
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// os/exec tricks.
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if config.WindowsContainer {
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comm := &WindowsContainerCommunicator{Communicator{
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ContainerID: containerId,
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HostDir: tempDir,
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ContainerDir: config.ContainerDir,
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Version: version,
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Config: config,
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ContainerUser: containerUser,
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EntryPoint: []string{"powershell"},
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},
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}
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state.Put("communicator", comm)
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} else {
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comm := &Communicator{
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ContainerID: containerId,
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HostDir: tempDir,
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ContainerDir: config.ContainerDir,
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Version: version,
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Config: config,
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ContainerUser: containerUser,
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EntryPoint: []string{"/bin/sh", "-c"},
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}
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state.Put("communicator", comm)
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}
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return multistep.ActionContinue
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}
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func (s *StepConnectDocker) Cleanup(state multistep.StateBag) {}
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func getContainerUser(containerId string) (string, error) {
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inspectArgs := []string{"docker", "inspect", "--format", "{{.Config.User}}", containerId}
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stdout, err := exec.Command(inspectArgs[0], inspectArgs[1:]...).Output()
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if err != nil {
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errStr := fmt.Sprintf("Failed to inspect the container: %s", err)
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if ee, ok := err.(*exec.ExitError); ok {
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errStr = fmt.Sprintf("%s, %s", errStr, ee.Stderr)
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}
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return "", fmt.Errorf(errStr)
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}
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return strings.TrimSpace(string(stdout)), nil
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}
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