// migrateLegacySqliteLinks migrates sqlite links to use links from HostConfig
// when sqlite links were used, hostConfig.Links was set to nil
func (daemon *Daemon) migrateLegacySqliteLinks(db *graphdb.Database, container *container.Container) error {
// if links is populated (or an empty slice), then this isn't using sqlite links and can be skipped
if container.HostConfig == nil || container.HostConfig.Links != nil {
return nil
}
logrus.Debugf("migrating legacy sqlite link info for container: %s", container.ID)
fullName := container.Name
if fullName[0] != '/' {
fullName = "/" + fullName
}
// don't use a nil slice, this ensures that the check above will skip once the migration has completed
links := []string{}
children, err := db.Children(fullName, 0)
if err != nil {
if !strings.Contains(err.Error(), "Cannot find child for") {
return err
}
// else continue... it's ok if we didn't find any children, it'll just be nil and we can continue the migration
}
for _, child := range children {
c, err := daemon.GetContainer(child.Entity.ID())
if err != nil {
return err
}
links = append(links, c.Name+":"+child.Edge.Name)
}
container.HostConfig.Links = links
return container.WriteHostConfig()
}
