woodpecker/build/docker/docker.go

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package docker
import (
"io"
"github.com/drone/drone/build"
"github.com/drone/drone/build/docker/internal"
"github.com/drone/drone/yaml"
"github.com/samalba/dockerclient"
)
type dockerEngine struct {
client dockerclient.Client
}
func (e *dockerEngine) ContainerStart(container *yaml.Container) (string, error) {
conf := toContainerConfig(container)
auth := toAuthConfig(container)
// pull the image if it does not exists or if the Container
// is configured to always pull a new image.
_, err := e.client.InspectImage(container.Image)
if err != nil || container.Pull {
e.client.PullImage(container.Image, auth)
}
// create and start the container and return the Container ID.
id, err := e.client.CreateContainer(conf, container.ID, auth)
if err != nil {
return id, err
}
err = e.client.StartContainer(id, &conf.HostConfig)
if err != nil {
// remove the container if it cannot be started
e.client.RemoveContainer(id, true, true)
return id, err
}
return id, nil
}
func (e *dockerEngine) ContainerStop(id string) error {
e.client.StopContainer(id, 1)
e.client.KillContainer(id, "9")
return nil
}
func (e *dockerEngine) ContainerRemove(id string) error {
e.client.StopContainer(id, 1)
e.client.KillContainer(id, "9")
e.client.RemoveContainer(id, true, true)
return nil
}
func (e *dockerEngine) ContainerWait(id string) (*build.State, error) {
// wait for the container to exit
//
// TODO(bradrydzewski) we should have a for loop here
// to re-connect and wait if this channel returns a
// result even though the container is still running.
//
<-e.client.Wait(id)
v, err := e.client.InspectContainer(id)
if err != nil {
return nil, err
}
return &build.State{
ExitCode: v.State.ExitCode,
OOMKilled: v.State.OOMKilled,
}, nil
}
func (e *dockerEngine) ContainerLogs(id string) (io.ReadCloser, error) {
opts := &dockerclient.LogOptions{
Follow: true,
Stdout: true,
Stderr: true,
}
piper, pipew := io.Pipe()
go func() {
defer pipew.Close()
// sometimes the docker logs fails due to parsing errors. this
// routine will check for such a failure and attempt to resume
// if necessary.
for i := 0; i < 5; i++ {
if i > 0 {
opts.Tail = 1
}
rc, err := e.client.ContainerLogs(id, opts)
if err != nil {
return
}
defer rc.Close()
// use Docker StdCopy
internal.StdCopy(pipew, pipew, rc)
// check to see if the container is still running. If not,
// we can safely exit and assume there are no more logs left
// to stream.
v, err := e.client.InspectContainer(id)
if err != nil || !v.State.Running {
return
}
}
}()
return piper, nil
}