// 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) run() error {
// create and run the container
conf := docker.Config{
Hostname: script.DockerHostname(b.Build.Docker),
Image: b.image.ID,
AttachStdin: false,
AttachStdout: true,
AttachStderr: true,
Tty: script.DockerTty(b.Build.Docker),
}
// configure if Docker should run in privileged mode
host := docker.HostConfig{
Privileged: (b.Privileged && b.Repo.IsTrusted()),
}
if host.Privileged {
host.NetworkMode = script.DockerNetworkMode(b.Build.Docker)
}
// debugging
log.Noticef("starting build %s", b.Build.Name)
// link service containers
for i, service := range b.services {
// convert name of the image to a slug
_, name, _ := parseImageName(b.Build.Services[i])
// link the service container to our
// build container.
host.Links = append(host.Links, service.Name[1:]+":"+name)
}
// where are temp files going to go?
tmpPath := "/tmp/drone"
if len(os.Getenv("DRONE_TMP")) > 0 {
tmpPath = os.Getenv("DRONE_TMP")
}
log.Infof("temp directory is %s", tmpPath)
if err := os.MkdirAll(tmpPath, 0777); err != nil {
return fmt.Errorf("Failed to create temp directory at %s: %s", tmpPath, err)
}
// link cached volumes
conf.Volumes = make(map[string]struct{})
for _, volume := range b.Build.Cache {
name := filepath.Clean(b.Repo.Name)
volume := filepath.Clean(volume)
// with Docker, volumes must be an absolute path. If an absolute
// path is not provided, then assume it is for the repository
// working directory.
if strings.HasPrefix(volume, "/") == false {
volume = filepath.Join(b.Repo.Dir, volume)
}
// local cache path on the host machine
// this path is going to be really long
hostpath := filepath.Join(tmpPath, name, volume)
// check if the volume is created
if _, err := os.Stat(hostpath); err != nil {
// if does not exist then create
os.MkdirAll(hostpath, 0777)
}
host.Binds = append(host.Binds, hostpath+":"+volume)
conf.Volumes[volume] = struct{}{}
// debugging
log.Infof("mounting volume %s:%s", hostpath, volume)
}
// create the container from the image
run, err := b.dockerClient.Containers.Create(&conf)
if err != nil {
return fmt.Errorf("Error: Failed to create build container. %s", err)
}
// cache instance of docker.Run
b.container = run
// attach to the container
go func() {
b.dockerClient.Containers.Attach(run.ID, &writer{b.Stdout, 0})
}()
// start the container
if err := b.dockerClient.Containers.Start(run.ID, &host); err != nil {
b.BuildState.ExitCode = 1
b.BuildState.Finished = time.Now().UTC().Unix()
return fmt.Errorf("Error: Failed to start build container. %s", err)
}
// wait for the container to stop
wait, err := b.dockerClient.Containers.Wait(run.ID)
if err != nil {
b.BuildState.ExitCode = 1
b.BuildState.Finished = time.Now().UTC().Unix()
return fmt.Errorf("Error: Failed to wait for build container. %s", err)
}
// set completion time
b.BuildState.Finished = time.Now().UTC().Unix()
// get the exit code if possible
b.BuildState.ExitCode = wait.StatusCode
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
}