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Prepull etcd before an upgrade

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If kubeadm ever has to upgrade etcd it should prepull the image so
there is less downtime during the upgrade when etcd versions change.

Fixes kubernetes/kubeadm#669

Signed-off-by: Chuck Ha <ha.chuck@gmail.com>
This commit is contained in:
Chuck Ha 2018-04-24 14:12:31 +01:00
parent 4344d33772
commit 87fa644b33
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1 changed files with 1 additions and 1 deletions
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2
cmd/kubeadm/app/phases/upgrade/prepull.go
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@ -87,7 +87,7 @@ func (d *DaemonSetPrepuller) DeleteFunc(component string) error {
// PrepullImagesInParallel creates DaemonSets synchronously but waits in parallel for the images to pull
func PrepullImagesInParallel(kubePrepuller Prepuller, timeout time.Duration) error {
componentsToPrepull := constants.MasterComponents
componentsToPrepull := append(constants.MasterComponents, constants.Etcd)
fmt.Printf("[upgrade/prepull] Will prepull images for components %v\n", componentsToPrepull)
timeoutChan := time.After(timeout)