You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
105 lines
2.9 KiB
Go
105 lines
2.9 KiB
Go
package container
|
|
|
|
import (
|
|
"fmt"
|
|
"strings"
|
|
|
|
"github.com/samalba/dockerclient"
|
|
)
|
|
|
|
func NewContainer(containerInfo *dockerclient.ContainerInfo, imageInfo *dockerclient.ImageInfo) *Container {
|
|
return &Container{
|
|
containerInfo: containerInfo,
|
|
imageInfo: imageInfo,
|
|
}
|
|
}
|
|
|
|
type Container struct {
|
|
Stale bool
|
|
|
|
containerInfo *dockerclient.ContainerInfo
|
|
imageInfo *dockerclient.ImageInfo
|
|
}
|
|
|
|
func (c Container) Name() string {
|
|
return c.containerInfo.Name
|
|
}
|
|
|
|
func (c Container) Links() []string {
|
|
var links []string
|
|
|
|
if (c.containerInfo != nil) && (c.containerInfo.HostConfig != nil) {
|
|
for _, link := range c.containerInfo.HostConfig.Links {
|
|
name := strings.Split(link, ":")[0]
|
|
links = append(links, name)
|
|
}
|
|
}
|
|
|
|
return links
|
|
}
|
|
|
|
func (c Container) IsWatchtower() bool {
|
|
val, ok := c.containerInfo.Config.Labels["com.centurylinklabs.watchtower"]
|
|
return ok && val == "true"
|
|
}
|
|
|
|
// Ideally, we'd just be able to take the ContainerConfig from the old container
|
|
// and use it as the starting point for creating the new container; however,
|
|
// the ContainerConfig that comes back from the Inspect call merges the default
|
|
// configuration (the stuff specified in the metadata for the image itself)
|
|
// with the overridden configuration (the stuff that you might specify as part
|
|
// of the "docker run"). In order to avoid unintentionally overriding the
|
|
// defaults in the new image we need to separate the override options from the
|
|
// default options. To do this we have to compare the ContainerConfig for the
|
|
// running container with the ContainerConfig from the image that container was
|
|
// started from. This function returns a ContainerConfig which contains just
|
|
// the options overridden at runtime.
|
|
func (c Container) runtimeConfig() *dockerclient.ContainerConfig {
|
|
config := c.containerInfo.Config
|
|
imageConfig := c.imageInfo.Config
|
|
|
|
if config.WorkingDir == imageConfig.WorkingDir {
|
|
config.WorkingDir = ""
|
|
}
|
|
|
|
if config.User == imageConfig.User {
|
|
config.User = ""
|
|
}
|
|
|
|
if sliceEqual(config.Cmd, imageConfig.Cmd) {
|
|
config.Cmd = nil
|
|
}
|
|
|
|
if sliceEqual(config.Entrypoint, imageConfig.Entrypoint) {
|
|
config.Entrypoint = nil
|
|
}
|
|
|
|
config.Env = sliceSubtract(config.Env, imageConfig.Env)
|
|
|
|
config.Labels = stringMapSubtract(config.Labels, imageConfig.Labels)
|
|
|
|
config.Volumes = structMapSubtract(config.Volumes, imageConfig.Volumes)
|
|
|
|
config.ExposedPorts = structMapSubtract(config.ExposedPorts, imageConfig.ExposedPorts)
|
|
for p := range c.containerInfo.HostConfig.PortBindings {
|
|
config.ExposedPorts[p] = struct{}{}
|
|
}
|
|
|
|
return config
|
|
}
|
|
|
|
// Any links in the HostConfig need to be re-written before they can be
|
|
// re-submitted to the Docker create API.
|
|
func (c Container) hostConfig() *dockerclient.HostConfig {
|
|
hostConfig := c.containerInfo.HostConfig
|
|
|
|
for i, link := range hostConfig.Links {
|
|
name := link[0:strings.Index(link, ":")]
|
|
alias := link[strings.LastIndex(link, "/"):]
|
|
|
|
hostConfig.Links[i] = fmt.Sprintf("%s:%s", name, alias)
|
|
}
|
|
|
|
return hostConfig
|
|
}
|