forked from docker/libcompose
/
container.go
432 lines (348 loc) · 9.65 KB
/
container.go
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package docker
import (
"bufio"
"fmt"
"math"
"strings"
"github.com/Sirupsen/logrus"
"github.com/docker/docker/cliconfig"
"github.com/docker/docker/graph/tags"
"github.com/docker/docker/pkg/parsers"
"github.com/docker/docker/pkg/stdcopy"
"github.com/docker/docker/registry"
"github.com/docker/docker/utils"
"github.com/docker/libcompose/logger"
"github.com/docker/libcompose/project"
"github.com/samalba/dockerclient"
)
type Container struct {
project.EmptyService
name string
service *Service
client dockerclient.Client
}
func NewContainer(client dockerclient.Client, name string, service *Service) *Container {
return &Container{
client: client,
name: name,
service: service,
}
}
func (c *Container) findExisting() (*dockerclient.Container, error) {
return GetContainerByName(c.client, c.name)
}
func (c *Container) findInfo() (*dockerclient.ContainerInfo, error) {
container, err := c.findExisting()
if err != nil {
return nil, err
}
return c.client.InspectContainer(container.Id)
}
func (c *Container) Info() (project.Info, error) {
container, err := c.findExisting()
if err != nil {
return nil, err
}
result := project.Info{}
result = append(result, project.InfoPart{"Name", name(container.Names)})
result = append(result, project.InfoPart{"Command", container.Command})
result = append(result, project.InfoPart{"State", container.Status})
result = append(result, project.InfoPart{"Ports", portString(container.Ports)})
return result, nil
}
func portString(ports []dockerclient.Port) string {
result := []string{}
for _, port := range ports {
if port.PublicPort > 0 {
result = append(result, fmt.Sprintf("%s:%d->%d/%s", port.IP, port.PublicPort, port.PrivatePort, port.Type))
} else {
result = append(result, fmt.Sprintf("%d/%s", port.PrivatePort, port.Type))
}
}
return strings.Join(result, ", ")
}
func name(names []string) string {
max := math.MaxInt32
var current string
for _, v := range names {
if len(v) < max {
max = len(v)
current = v
}
}
return current[1:]
}
func (c *Container) Create(imageName string) (*dockerclient.Container, error) {
container, err := c.findExisting()
if err != nil {
return nil, err
}
if container == nil {
container, err = c.createContainer(imageName)
if err != nil {
return nil, err
}
}
return container, err
}
func (c *Container) Down() error {
return c.withContainer(func(container *dockerclient.Container) error {
return c.client.StopContainer(container.Id, c.service.context.Timeout)
})
}
func (c *Container) Kill() error {
return c.withContainer(func(container *dockerclient.Container) error {
return c.client.KillContainer(container.Id, c.service.context.Signal)
})
}
func (c *Container) Delete() error {
container, err := c.findExisting()
if err != nil || container == nil {
return err
}
info, err := c.client.InspectContainer(container.Id)
if err != nil {
return err
}
if info.State.Running {
err := c.client.StopContainer(container.Id, c.service.context.Timeout)
if err != nil {
return err
}
}
return c.client.RemoveContainer(container.Id, true, false)
}
func (c *Container) Up(imageName string) error {
var err error
defer func() {
if err == nil && c.service.context.Log {
go c.Log()
}
}()
container, err := c.Create(imageName)
if err != nil {
return err
}
info, err := c.client.InspectContainer(container.Id)
if err != nil {
return err
}
if !info.State.Running {
logrus.Debugf("Starting container: %s: %#v", container.Id, info.HostConfig)
err = c.populateAdditionalHostConfig(info.HostConfig)
if err != nil {
return err
}
err := c.client.StartContainer(container.Id, info.HostConfig)
return err
}
return nil
}
func (c *Container) OutOfSync() (bool, error) {
container, err := c.findExisting()
if err != nil || container == nil {
return false, err
}
info, err := c.client.InspectContainer(container.Id)
if err != nil {
return false, err
}
return info.Config.Labels[HASH.Str()] != project.GetServiceHash(c.service), nil
}
func (c *Container) createContainer(imageName string) (*dockerclient.Container, error) {
config, err := ConvertToApi(c.service.serviceConfig)
if err != nil {
return nil, err
}
config.Image = imageName
if config.Labels == nil {
config.Labels = map[string]string{}
}
config.Labels[NAME.Str()] = c.name
config.Labels[SERVICE.Str()] = c.service.name
config.Labels[PROJECT.Str()] = c.service.context.Project.Name
config.Labels[HASH.Str()] = project.GetServiceHash(c.service)
err = c.populateAdditionalHostConfig(&config.HostConfig)
if err != nil {
return nil, err
}
logrus.Debugf("Creating container %s %#v", c.name, config)
_, err = c.client.CreateContainer(config, c.name)
if err != nil && err.Error() == "Not found" {
err = c.pull(config.Image)
}
if err != nil {
logrus.Debugf("Failed to create container %s: %v", c.name, err)
return nil, err
}
return c.findExisting()
}
func (c *Container) populateAdditionalHostConfig(hostConfig *dockerclient.HostConfig) error {
links := map[string]string{}
for _, link := range c.service.DependentServices() {
if _, ok := c.service.context.Project.Configs[link.Target]; !ok {
continue
}
service, err := c.service.context.Project.CreateService(link.Target)
if err != nil {
return err
}
containers, err := service.Containers()
if err != nil {
return err
}
if link.Type == project.REL_TYPE_LINK {
c.addLinks(links, service, link, containers)
} else if link.Type == project.REL_TYPE_IPC_NAMESPACE {
hostConfig, err = c.addIpc(hostConfig, service, containers)
} else if link.Type == project.REL_TYPE_NET_NAMESPACE {
hostConfig, err = c.addNetNs(hostConfig, service, containers)
}
if err != nil {
return err
}
}
hostConfig.Links = []string{}
for k, v := range links {
hostConfig.Links = append(hostConfig.Links, strings.Join([]string{v, k}, ":"))
}
for _, v := range c.service.Config().ExternalLinks {
hostConfig.Links = append(hostConfig.Links, v)
}
return nil
}
func (c *Container) addLinks(links map[string]string, service project.Service, rel project.ServiceRelationship, containers []project.Container) {
for _, container := range containers {
if _, ok := links[rel.Alias]; !ok {
links[rel.Alias] = container.Name()
}
links[container.Name()] = container.Name()
}
}
func (c *Container) addIpc(config *dockerclient.HostConfig, service project.Service, containers []project.Container) (*dockerclient.HostConfig, error) {
if len(containers) == 0 {
return nil, fmt.Errorf("Failed to find container for IPC %", c.service.Config().Ipc)
}
id, err := containers[0].Id()
if err != nil {
return nil, err
}
config.IpcMode = "container:" + id
return config, nil
}
func (c *Container) addNetNs(config *dockerclient.HostConfig, service project.Service, containers []project.Container) (*dockerclient.HostConfig, error) {
if len(containers) == 0 {
return nil, fmt.Errorf("Failed to find container for networks ns %", c.service.Config().Net)
}
id, err := containers[0].Id()
if err != nil {
return nil, err
}
config.NetworkMode = "container:" + id
return config, nil
}
func (c *Container) Id() (string, error) {
container, err := c.findExisting()
if container == nil {
return "", err
} else {
return container.Id, err
}
}
func (c *Container) Name() string {
return c.name
}
func (c *Container) Pull() error {
return c.pull(c.service.serviceConfig.Image)
}
func (c *Container) Restart() error {
container, err := c.findExisting()
if err != nil || container == nil {
return err
}
return c.client.RestartContainer(container.Id, c.service.context.Timeout)
}
func (c *Container) Log() error {
container, err := c.findExisting()
if container == nil || err != nil {
return err
}
info, err := c.client.InspectContainer(container.Id)
if info == nil || err != nil {
return err
}
l := c.service.context.LoggerFactory.Create(c.name)
output, err := c.client.ContainerLogs(container.Id, &dockerclient.LogOptions{
Follow: true,
Stdout: true,
Stderr: true,
Tail: 10,
})
if err != nil {
return err
}
if info.Config.Tty {
scanner := bufio.NewScanner(output)
for scanner.Scan() {
l.Out([]byte(scanner.Text() + "\n"))
}
return scanner.Err()
} else {
_, err := stdcopy.StdCopy(&logger.LoggerWrapper{
Logger: l,
}, &logger.LoggerWrapper{
Err: true,
Logger: l,
}, output)
return err
}
return nil
}
func (c *Container) pull(image string) error {
taglessRemote, tag := parsers.ParseRepositoryTag(image)
if tag == "" {
image = utils.ImageReference(taglessRemote, tags.DEFAULTTAG)
}
repoInfo, err := registry.ParseRepositoryInfo(taglessRemote)
if err != nil {
return err
}
authConfig := cliconfig.AuthConfig{}
if c.service.context.ConfigFile != nil && repoInfo != nil && repoInfo.Index != nil {
authConfig = registry.ResolveAuthConfig(c.service.context.ConfigFile, repoInfo.Index)
}
err = c.client.PullImage(image, &dockerclient.AuthConfig{
Username: authConfig.Username,
Password: authConfig.Password,
Email: authConfig.Email,
})
if err != nil {
logrus.Errorf("Failed to pull image %s: %v", image, err)
}
return err
}
func (c *Container) withContainer(action func(*dockerclient.Container) error) error {
container, err := c.findExisting()
if err != nil {
return err
}
if container != nil {
return action(container)
}
return nil
}
func (c *Container) Port(port string) (string, error) {
info, err := c.findInfo()
if err != nil {
return "", err
}
if bindings, ok := info.NetworkSettings.Ports[port]; ok {
result := []string{}
for _, binding := range bindings {
result = append(result, binding.HostIp+":"+binding.HostPort)
}
return strings.Join(result, "\n"), nil
} else {
return "", nil
}
}