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Fix the map concurrent read/write issue in deployment controller

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This commit is contained in:
Janet Kuo
2016-08-03 11:19:12 -07:00
parent 2301ab7e0e
commit 2d1490a024
2 changed files with 47 additions and 19 deletions
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21
pkg/controller/deployment/util/deployment_util.go
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@@ -402,17 +402,26 @@ func ListPods(deployment *extensions.Deployment, getPodList podListFunc) (*api.P
// (e.g. the addition of a new field will cause the hash code to change)
// Note that we assume input podTemplateSpecs contain non-empty labels
func equalIgnoreHash(template1, template2 api.PodTemplateSpec) (bool, error) {
// First, compare template.Labels (ignoring hash)
labels1, labels2 := template1.Labels, template2.Labels
// The podTemplateSpec must have a non-empty label so that label selectors can find them.
// This is checked by validation (of resources contain a podTemplateSpec).
if len(template1.Labels) == 0 || len(template2.Labels) == 0 {
if len(labels1) == 0 || len(labels2) == 0 {
return false, fmt.Errorf("Unexpected empty labels found in given template")
}
hash1 := template1.Labels[extensions.DefaultDeploymentUniqueLabelKey]
hash2 := template2.Labels[extensions.DefaultDeploymentUniqueLabelKey]
// compare equality ignoring pod-template-hash
template1.Labels[extensions.DefaultDeploymentUniqueLabelKey] = hash2
if len(labels1) > len(labels2) {
labels1, labels2 = labels2, labels1
}
// We make sure len(labels2) >= len(labels1)
for k, v := range labels2 {
if labels1[k] != v && k != extensions.DefaultDeploymentUniqueLabelKey {
return false, nil
}
}
// Then, compare the templates without comparing their labels
template1.Labels, template2.Labels = nil, nil
result := api.Semantic.DeepEqual(template1, template2)
template1.Labels[extensions.DefaultDeploymentUniqueLabelKey] = hash1
return result, nil
}