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reaper.go
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reaper.go
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package reaper
import (
"time"
"github.com/golang/glog"
kapi "k8s.io/kubernetes/pkg/api"
kerrors "k8s.io/kubernetes/pkg/api/errors"
kclient "k8s.io/kubernetes/pkg/client/unversioned"
"k8s.io/kubernetes/pkg/kubectl"
"github.com/openshift/origin/pkg/client"
"github.com/openshift/origin/pkg/deploy/util"
)
// NewDeploymentConfigReaper returns a new reaper for deploymentConfigs
func NewDeploymentConfigReaper(oc *client.Client, kc *kclient.Client) kubectl.Reaper {
return &DeploymentConfigReaper{oc: oc, kc: kc, pollInterval: kubectl.Interval, timeout: kubectl.Timeout}
}
// DeploymentConfigReaper implements the Reaper interface for deploymentConfigs
type DeploymentConfigReaper struct {
oc client.Interface
kc kclient.Interface
pollInterval, timeout time.Duration
}
// Stop scales a replication controller via its deployment configuration down to
// zero replicas, waits for all of them to get deleted and then deletes both the
// replication controller and its deployment configuration.
func (reaper *DeploymentConfigReaper) Stop(namespace, name string, timeout time.Duration, gracePeriod *kapi.DeleteOptions) error {
// If the config is already deleted, it may still have associated
// deployments which didn't get cleaned up during prior calls to Stop. If
// the config can't be found, still make an attempt to clean up the
// deployments.
//
// It's important to delete the config first to avoid an undesirable side
// effect which can cause the deployment to be re-triggered upon the
// config's deletion. See https://github.com/openshift/origin/issues/2721
// for more details.
err := reaper.oc.DeploymentConfigs(namespace).Delete(name)
configNotFound := kerrors.IsNotFound(err)
if err != nil && !configNotFound {
return err
}
// Clean up deployments related to the config.
options := kapi.ListOptions{LabelSelector: util.ConfigSelector(name)}
rcList, err := reaper.kc.ReplicationControllers(namespace).List(options)
if err != nil {
return err
}
rcReaper, err := kubectl.ReaperFor(kapi.Kind("ReplicationController"), reaper.kc)
if err != nil {
return err
}
// If there is neither a config nor any deployments, we can return NotFound.
deployments := rcList.Items
if configNotFound && len(deployments) == 0 {
return kerrors.NewNotFound(kapi.Resource("deploymentconfig"), name)
}
for _, rc := range deployments {
if err = rcReaper.Stop(rc.Namespace, rc.Name, timeout, gracePeriod); err != nil {
// Better not error out here...
glog.Infof("Cannot delete ReplicationController %s/%s: %v", rc.Namespace, rc.Name, err)
}
}
return nil
}