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Avoid unnecessary DaemonSet collisionCount bump

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This commit is contained in:
Janet Kuo 2018-08-15 16:07:59 -07:00
parent 68cfa7ef10
commit fd7a694440
1 changed files with 6 additions and 1 deletions
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7
pkg/controller/daemon/update.go
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@ -19,6 +19,7 @@ package daemon
import (
"bytes"
"fmt"
"reflect"
"sort"
"github.com/golang/glog"
@ -346,11 +347,15 @@ func (dsc *DaemonSetsController) snapshot(ds *apps.DaemonSet, revision int64) (*
}
// Handle name collisions between different history
// TODO: Is it okay to get from dsLister?
// Get the latest DaemonSet from the API server to make sure collision count is only increased when necessary
currDS, getErr := dsc.kubeClient.ExtensionsV1beta1().DaemonSets(ds.Namespace).Get(ds.Name, metav1.GetOptions{})
if getErr != nil {
return nil, getErr
}
// If the collision count used to compute hash was in fact stale, there's no need to bump collision count; retry again
if !reflect.DeepEqual(currDS.Status.CollisionCount, ds.Status.CollisionCount) {
return nil, fmt.Errorf("found a stale collision count (%d, expected %d) of DaemonSet %q while processing; will retry until it is updated", ds.Status.CollisionCount, currDS.Status.CollisionCount, ds.Name)
}
if currDS.Status.CollisionCount == nil {
currDS.Status.CollisionCount = new(int32)
}