// New creates the rkt container runtime which implements the container runtime interface.
// It will test if the rkt binary is in the $PATH, and whether we can get the
// version of it. If so, creates the rkt container runtime, otherwise returns an error.
func New(config *Config,
generator qingcontainer.RunContainerOptionsGenerator,
recorder record.EventRecorder,
containerRefManager *qingcontainer.RefManager,
readinessManager *qingcontainer.ReadinessManager,
volumeGetter volumeGetter) (qingcontainer.Runtime, error) {
systemdVersion, err := getSystemdVersion()
if err != nil {
return nil, err
}
result, err := systemdVersion.Compare(systemdMinimumVersion)
if err != nil {
return nil, err
}
if result < 0 {
return nil, fmt.Errorf("rkt: systemd version is too old, requires at least %v", systemdMinimumVersion)
}
systemd, err := dbus.New()
if err != nil {
return nil, fmt.Errorf("cannot connect to dbus: %v", err)
}
// Test if rkt binary is in $PATH.
rktBinAbsPath, err := exec.LookPath(rktBinName)
if err != nil {
return nil, fmt.Errorf("cannot find rkt binary: %v", err)
}
rkt := &runtime{
systemd: systemd,
rktBinAbsPath: rktBinAbsPath,
config: config,
dockerKeyring: credentialprovider.NewDockerKeyring(),
containerRefManager: containerRefManager,
generator: generator,
recorder: recorder,
readinessManager: readinessManager,
volumeGetter: volumeGetter,
}
rkt.prober = prober.New(rkt, readinessManager, containerRefManager, recorder)
// Test the rkt version.
version, err := rkt.Version()
if err != nil {
return nil, err
}
result, err = version.Compare(rktMinimumVersion)
if err != nil {
return nil, err
}
if result < 0 {
return nil, fmt.Errorf("rkt: Version is too old, requires at least %v", rktMinimumVersion)
}
return rkt, nil
}
// newDockerPuller creates a new instance of the default implementation of DockerPuller.
func newDockerPuller(client DockerInterface, qps float32, burst int) DockerPuller {
dp := dockerPuller{
client: client,
keyring: credentialprovider.NewDockerKeyring(),
}
if qps == 0.0 {
return dp
}
return &throttledDockerPuller{
puller: dp,
limiter: util.NewTokenBucketRateLimiter(qps, burst),
}
}