// removeContainers removes all containers parallelly.
// It retuns error channel and if something wrong, error is sent there.
func removeContainers(client dockerclient.Client, containers []dockerclient.Container, force, delVolume bool) (chan dockerclient.Container, chan error) {
var wg sync.WaitGroup
resultCh, errCh := make(chan dockerclient.Container), make(chan error)
for _, container := range containers {
wg.Add(1)
go func(c dockerclient.Container) {
defer wg.Done()
if err := client.RemoveContainer(c.Id, force, delVolume); err != nil {
errCh <- fmt.Errorf(
"failed to remove %s (%s): %s", c.Names[0], c.Id, err)
return
}
resultCh <- c
}(container)
}
go func() {
// Wait until all remove task and close error channnel then
wg.Wait()
close(resultCh)
close(errCh)
}()
return resultCh, errCh
}
func run(client dockerclient.Client, args []string, input string) (int, error) {
image := "drone/drone-exec:latest"
entrypoint := []string{"/bin/drone-exec"}
args = append(args, "--", input)
conf := &dockerclient.ContainerConfig{
Image: image,
Entrypoint: entrypoint,
Cmd: args,
HostConfig: dockerclient.HostConfig{
Binds: []string{"/var/run/docker.sock:/var/run/docker.sock"},
},
Volumes: map[string]struct{}{
"/var/run/docker.sock": struct{}{},
},
}
info, err := docker.Run(client, conf, false)
if err != nil {
return 0, err
}
client.StopContainer(info.Id, 15)
client.RemoveContainer(info.Id, true, true)
return info.State.ExitCode, err
}
func (e *engine) runJobNotify(r *Task, client dockerclient.Client) error {
name := fmt.Sprintf("drone_build_%d_notify", r.Build.ID)
defer func() {
client.KillContainer(name, "9")
client.RemoveContainer(name, true, true)
}()
// encode the build payload to write to stdin
// when launching the build container
in, err := encodeToLegacyFormat(r)
if err != nil {
log.Errorf("failure to marshal work. %s", err)
return err
}
args := DefaultNotifyArgs
args = append(args, "--")
args = append(args, string(in))
conf := &dockerclient.ContainerConfig{
Image: DefaultAgent,
Entrypoint: DefaultEntrypoint,
Cmd: args,
Env: e.envs,
HostConfig: dockerclient.HostConfig{
Binds: []string{"/var/run/docker.sock:/var/run/docker.sock"},
MemorySwappiness: -1,
},
Volumes: map[string]struct{}{
"/var/run/docker.sock": struct{}{},
},
}
log.Infof("preparing container %s", name)
info, err := docker.Run(client, conf, name)
if err != nil {
log.Errorf("Error starting notification container %s. %s", name, err)
}
// for debugging purposes we print a failed notification executions
// output to the logs. Otherwise we have no way to troubleshoot failed
// notifications. This is temporary code until I've come up with
// a better solution.
if info != nil && info.State.ExitCode != 0 && log.GetLevel() >= log.InfoLevel {
var buf bytes.Buffer
rc, err := client.ContainerLogs(name, docker.LogOpts)
if err == nil {
defer rc.Close()
stdcopy.StdCopy(&buf, &buf, io.LimitReader(rc, 50000))
}
log.Infof("Notification container %s exited with %d", name, info.State.ExitCode)
log.Infoln(buf.String())
}
return err
}
func Start(client dockerclient.Client, conf *dockerclient.ContainerConfig, auth *dockerclient.AuthConfig, pull bool) (*dockerclient.ContainerInfo, error) {
// force-pull the image if specified.
if pull {
log.Printf("Pulling image %s", conf.Image)
client.PullImage(conf.Image, auth)
}
// attempts to create the contianer
id, err := client.CreateContainer(conf, "", auth)
if err != nil {
log.Printf("Pulling image %s", conf.Image)
// and pull the image and re-create if that fails
err = client.PullImage(conf.Image, auth)
if err != nil {
log.Errorf("Error pulling %s. %s\n", conf.Image, err)
return nil, err
}
id, err = client.CreateContainer(conf, "", auth)
if err != nil {
log.Errorf("Error creating %s. %s\n", conf.Image, err)
client.RemoveContainer(id, true, true)
return nil, err
}
}
// fetches the container information
info, err := client.InspectContainer(id)
if err != nil {
log.Errorf("Error inspecting %s. %s\n", conf.Image, err)
client.RemoveContainer(id, true, true)
return nil, err
}
// starts the container
err = client.StartContainer(id, &conf.HostConfig)
if err != nil {
log.Errorf("Error starting %s. %s\n", conf.Image, err)
}
return info, err
}
// RunDaemon creates the docker container, pulling images if necessary, starts
// the container and returns the container information. It does not wait for
// the container to exit.
func RunDaemon(client dockerclient.Client, conf *dockerclient.ContainerConfig, name string) (*dockerclient.ContainerInfo, error) {
// attempts to create the contianer
id, err := client.CreateContainer(conf, name)
if err != nil {
// and pull the image and re-create if that fails
err = client.PullImage(conf.Image, nil)
if err != nil {
return nil, err
}
id, err = client.CreateContainer(conf, name)
if err != nil {
client.RemoveContainer(id, true, true)
return nil, err
}
}
// fetches the container information
info, err := client.InspectContainer(id)
if err != nil {
client.RemoveContainer(id, true, true)
return nil, err
}
// starts the container
err = client.StartContainer(id, &conf.HostConfig)
if err != nil {
client.RemoveContainer(id, true, true)
return nil, err
}
return info, err
}
func (e *engine) runJob(c context.Context, r *Task, updater *updater, client dockerclient.Client) error {
name := fmt.Sprintf("drone_build_%d_job_%d", r.Build.ID, r.Job.ID)
defer func() {
if r.Job.Status == model.StatusRunning {
r.Job.Status = model.StatusError
r.Job.Finished = time.Now().UTC().Unix()
r.Job.ExitCode = 255
}
if r.Job.Status == model.StatusPending {
r.Job.Status = model.StatusError
r.Job.Started = time.Now().UTC().Unix()
r.Job.Finished = time.Now().UTC().Unix()
r.Job.ExitCode = 255
}
updater.SetJob(c, r)
client.KillContainer(name, "9")
client.RemoveContainer(name, true, true)
}()
// marks the task as running
r.Job.Status = model.StatusRunning
r.Job.Started = time.Now().UTC().Unix()
// encode the build payload to write to stdin
// when launching the build container
in, err := encodeToLegacyFormat(r)
if err != nil {
log.Errorf("failure to marshal work. %s", err)
return err
}
// CREATE AND START BUILD
args := DefaultBuildArgs
if r.Build.Event == model.EventPull {
args = DefaultPullRequestArgs
}
args = append(args, "--")
args = append(args, string(in))
conf := &dockerclient.ContainerConfig{
Image: DefaultAgent,
Entrypoint: DefaultEntrypoint,
Cmd: args,
Env: e.envs,
HostConfig: dockerclient.HostConfig{
Binds: []string{"/var/run/docker.sock:/var/run/docker.sock"},
},
Volumes: map[string]struct{}{
"/var/run/docker.sock": struct{}{},
},
}
log.Infof("preparing container %s", name)
client.PullImage(conf.Image, nil)
_, err = docker.RunDaemon(client, conf, name)
if err != nil {
log.Errorf("error starting build container. %s", err)
return err
}
// UPDATE STATUS
err = updater.SetJob(c, r)
if err != nil {
log.Errorf("error updating job status as running. %s", err)
return err
}
// WAIT FOR OUTPUT
info, builderr := docker.Wait(client, name)
switch {
case info.State.ExitCode == 128:
r.Job.ExitCode = info.State.ExitCode
r.Job.Status = model.StatusKilled
case info.State.ExitCode == 130:
r.Job.ExitCode = info.State.ExitCode
r.Job.Status = model.StatusKilled
case builderr != nil:
r.Job.Status = model.StatusError
case info.State.ExitCode != 0:
r.Job.ExitCode = info.State.ExitCode
r.Job.Status = model.StatusFailure
default:
r.Job.Status = model.StatusSuccess
}
// send the logs to the datastore
var buf bytes.Buffer
rc, err := client.ContainerLogs(name, docker.LogOpts)
if err != nil && builderr != nil {
buf.WriteString("Error launching build")
buf.WriteString(builderr.Error())
} else if err != nil {
buf.WriteString("Error launching build")
buf.WriteString(err.Error())
log.Errorf("error opening connection to logs. %s", err)
return err
} else {
defer rc.Close()
stdcopy.StdCopy(&buf, &buf, io.LimitReader(rc, 5000000))
}
// update the task in the datastore
r.Job.Finished = time.Now().UTC().Unix()
err = updater.SetJob(c, r)
if err != nil {
log.Errorf("error updating job after completion. %s", err)
return err
}
err = updater.SetLogs(c, r, ioutil.NopCloser(&buf))
if err != nil {
log.Errorf("error updating logs. %s", err)
return err
}
log.Debugf("completed job %d with status %s.", r.Job.ID, r.Job.Status)
return nil
}
