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Hack PatchNodeStatus() to override the patch type on Status.Addresses

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This commit is contained in:
Dan Winship
2019-07-01 14:33:52 -04:00
parent e6ca651bed
commit 05a9634fb3
3 changed files with 224 additions and 2 deletions
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1
pkg/util/node/BUILD
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@@ -12,6 +12,7 @@ go_library(
importpath = "k8s.io/kubernetes/pkg/util/node",
deps = [
"//staging/src/k8s.io/api/core/v1:go_default_library",
"//staging/src/k8s.io/apimachinery/pkg/api/equality:go_default_library",
"//staging/src/k8s.io/apimachinery/pkg/apis/meta/v1:go_default_library",
"//staging/src/k8s.io/apimachinery/pkg/types:go_default_library",
"//staging/src/k8s.io/apimachinery/pkg/util/strategicpatch:go_default_library",

72
pkg/util/node/node.go
View File

@@ -27,6 +27,7 @@ import (
"k8s.io/klog"
"k8s.io/api/core/v1"
"k8s.io/apimachinery/pkg/api/equality"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/apimachinery/pkg/types"
"k8s.io/apimachinery/pkg/util/strategicpatch"
@@ -195,12 +196,21 @@ func preparePatchBytesforNodeStatus(nodeName types.NodeName, oldNode *v1.Node, n
return nil, fmt.Errorf("failed to Marshal oldData for node %q: %v", nodeName, err)
}
// NodeStatus.Addresses is incorrectly annotated as patchStrategy=merge, which
// will cause strategicpatch.CreateTwoWayMergePatch to create an incorrect patch
// if it changed.
manuallyPatchAddresses := (len(oldNode.Status.Addresses) > 0) && !equality.Semantic.DeepEqual(oldNode.Status.Addresses, newNode.Status.Addresses)
// Reset spec to make sure only patch for Status or ObjectMeta is generated.
// Note that we don't reset ObjectMeta here, because:
// 1. This aligns with Nodes().UpdateStatus().
// 2. Some component does use this to update node annotations.
newNode.Spec = oldNode.Spec
newData, err := json.Marshal(newNode)
diffNode := newNode.DeepCopy()
diffNode.Spec = oldNode.Spec
if manuallyPatchAddresses {
diffNode.Status.Addresses = oldNode.Status.Addresses
}
newData, err := json.Marshal(diffNode)
if err != nil {
return nil, fmt.Errorf("failed to Marshal newData for node %q: %v", nodeName, err)
}
@@ -209,5 +219,63 @@ func preparePatchBytesforNodeStatus(nodeName types.NodeName, oldNode *v1.Node, n
if err != nil {
return nil, fmt.Errorf("failed to CreateTwoWayMergePatch for node %q: %v", nodeName, err)
}
if manuallyPatchAddresses {
patchBytes, err = fixupPatchForNodeStatusAddresses(patchBytes, newNode.Status.Addresses)
if err != nil {
return nil, fmt.Errorf("failed to fix up NodeAddresses in patch for node %q: %v", nodeName, err)
}
}
return patchBytes, nil
}
// fixupPatchForNodeStatusAddresses adds a replace-strategy patch for Status.Addresses to
// the existing patch
func fixupPatchForNodeStatusAddresses(patchBytes []byte, addresses []v1.NodeAddress) ([]byte, error) {
// Given patchBytes='{"status": {"conditions": [ ... ], "phase": ...}}' and
// addresses=[{"type": "InternalIP", "address": "10.0.0.1"}], we need to generate:
//
// {
// "status": {
// "conditions": [ ... ],
// "phase": ...,
// "addresses": [
// {
// "type": "InternalIP",
// "address": "10.0.0.1"
// },
// {
// "$patch": "replace"
// }
// ]
// }
// }
var patchMap map[string]interface{}
if err := json.Unmarshal(patchBytes, &patchMap); err != nil {
return nil, err
}
addrBytes, err := json.Marshal(addresses)
if err != nil {
return nil, err
}
var addrArray []interface{}
if err := json.Unmarshal(addrBytes, &addrArray); err != nil {
return nil, err
}
addrArray = append(addrArray, map[string]interface{}{"$patch": "replace"})
status := patchMap["status"]
if status == nil {
status = map[string]interface{}{}
patchMap["status"] = status
}
statusMap, ok := status.(map[string]interface{})
if !ok {
return nil, fmt.Errorf("unexpected data in patch")
}
statusMap["addresses"] = addrArray
return json.Marshal(patchMap)
}