// teardown is a helper function that we can use to
// stop and remove the build container, its supporting image,
// and the supporting service containers.
func (b *Builder) teardown() error {
defer b.dockerClient.CloseIdleConnections()
// stop and destroy the container
if b.container != nil {
// debugging
log.Info("removing build container")
// stop the container, ignore error message
b.dockerClient.Containers.Stop(b.container.ID, 15)
// remove the container, ignore error message
if err := b.dockerClient.Containers.Remove(b.container.ID); err != nil {
log.Errf("failed to delete build container %s", b.container.ID)
}
}
// stop and destroy the container services
for i, container := range b.services {
// debugging
log.Infof("removing service container %s", b.Build.Services[i])
// stop the service container, ignore the error
b.dockerClient.Containers.Stop(container.ID, 15)
// remove the service container, ignore the error
if err := b.dockerClient.Containers.Remove(container.ID); err != nil {
log.Errf("failed to delete service container %s", container.ID)
}
}
// destroy the underlying image
if b.image != nil {
// debugging
log.Info("removing build image")
if _, err := b.dockerClient.Images.Remove(b.image.ID); err != nil {
log.Errf("failed to completely delete build image %s. %s", b.image.ID, err.Error())
}
}
return nil
}
func (b *Builder) setup() error {
// temp directory to store all files required
// to generate the Docker image.
dir, err := ioutil.TempDir("", "drone-")
if err != nil {
return err
}
// clean up after our mess.
defer os.RemoveAll(dir)
// make sure the image isn't empty. this would be bad
if len(b.Build.Image) == 0 {
log.Err("Fatal Error, No Docker Image specified")
return fmt.Errorf("Error: missing Docker image")
}
// if we're using an alias for the build name we
// should substitute it now
if alias, ok := builders[b.Build.Image]; ok {
b.Build.Image = alias.Tag
}
// if this is a local repository we should symlink
// to the source code in our temp directory
if b.Repo.IsLocal() {
// this is where we used to use symlinks. We should
// talk to the docker team about this, since copying
// the entire repository is slow :(
//
// see https://github.com/dotcloud/docker/pull/3567
//src := filepath.Join(dir, "src")
//err = os.Symlink(b.Repo.Path, src)
//if err != nil {
// return err
//}
src := filepath.Join(dir, "src")
cmd := exec.Command("cp", "-a", b.Repo.Path, src)
if err := cmd.Run(); err != nil {
return fmt.Errorf("Error: Unable to copy repository. %s", err)
}
}
// start all services required for the build
// that will get linked to the container.
for _, service := range b.Build.Services {
// Parse the name of the Docker image
// And then construct a fully qualified image name
owner, name, tag := parseImageName(service)
cname := fmt.Sprintf("%s/%s:%s", owner, name, tag)
// Get the image info
img, err := b.dockerClient.Images.Inspect(cname)
if err != nil {
// Get the image if it doesn't exist
if err := b.dockerClient.Images.Pull(cname); err != nil {
return fmt.Errorf("Error: Unable to pull image %s", cname)
}
img, err = b.dockerClient.Images.Inspect(cname)
if err != nil {
return fmt.Errorf("Error: Invalid or unknown image %s", cname)
}
}
// debugging
log.Infof("starting service container %s", cname)
// Run the contianer
run, err := b.dockerClient.Containers.RunDaemonPorts(cname, img.Config.ExposedPorts)
if err != nil {
return err
}
// Get the container info
info, err := b.dockerClient.Containers.Inspect(run.ID)
if err != nil {
// on error kill the container since it hasn't yet been
// added to the array and would therefore not get
// removed in the defer statement.
b.dockerClient.Containers.Stop(run.ID, 10)
b.dockerClient.Containers.Remove(run.ID)
return err
}
// Add the running service to the list
b.services = append(b.services, info)
}
if err := b.writeBuildScript(dir); err != nil {
return err
}
if err := b.writeProxyScript(dir); err != nil {
return err
}
if err := b.writeDockerfile(dir); err != nil {
return err
}
// debugging
log.Info("creating build image")
// check for build container (ie bradrydzewski/go:1.2)
// and download if it doesn't already exist or it's :latest tag
if _, err := b.dockerClient.Images.Inspect(b.Build.Image); err == docker.ErrNotFound || strings.HasSuffix(b.Build.Image, ":latest") {
// download the image if it doesn't exist
if err := b.dockerClient.Images.Pull(b.Build.Image); err != nil {
return fmt.Errorf("Error: Unable to pull image %s. %s", b.Build.Image, err)
}
} else if err != nil {
log.Errf("failed to inspect image %s", b.Build.Image)
}
// create the Docker image
id := createUID()
if err := b.dockerClient.Images.Build(id, dir); err != nil {
return err
}
// debugging
log.Infof("copying repository to %s", b.Repo.Dir)
// get the image details
b.image, err = b.dockerClient.Images.Inspect(id)
if err != nil {
// if we have problems with the image make sure
// we remove it before we exit
log.Errf("failed to verify build image %s", id)
return err
}
return nil
}