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update design

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Signed-off-by: lou <alex1988@outlook.com>
This commit is contained in:
lou
2023-10-10 19:11:43 +08:00
parent 19d5bee572
commit a607810b13
1 changed files with 13 additions and 25 deletions
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38
design/merge-patch-and-strategic-in-resource-modifier.md
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@@ -68,17 +68,12 @@ resourceModifierRules:
namespaces:
- ns1
mergePatches:
- patchData: |
{
"metadata": {
"annotations": {
"foo": null
}
}
}
- patchData:
metadata:
annotations:
foo: null
```
- The above configmap will apply the Merge Patch to all the pods in namespace ns1 and remove the annotation `foo` from the pods.
- Both json and yaml format are supported for the patchData.
### New Field StrategicPatches
StrategicPatches is a list to specify the strategic merge patches to be applied on the resource. The strategic merge patches will be applied in the order specified in the configmap. A subsequent patch is applied in order and if multiple patches are specified for the same path, the last patch will override the previous patches.
@@ -88,25 +83,18 @@ Example of StrategicPatches in ResourceModifierRule
version: v1
resourceModifierRules:
- conditions:
groupResource: pods
resourceNameRegex: "^my-pod$"
namespaces:
- ns1
groupResource: pods
resourceNameRegex: "^my-pod$"
namespaces:
- ns1
strategicPatches:
- patchData: |
{
"spec": {
"containers": [
{
"name": "nginx",
"image": "repo2/nginx"
}
]
}
}
- patchData:
spec:
containers:
- name: nginx
image: repo2/nginx
```
- The above configmap will apply the Strategic Merge Patch to the pod with name my-pod in namespace ns1 and update the image of container nginx to `repo2/nginx`.
- Both json and yaml format are supported for the patchData.
### Conditional Patches in ALL Patch Types
Since JSON Merge Patch and Strategic Merge Patch do not support conditional patches, we will use the `test` operation of JSON Patch to support conditional patches in all patch types by adding it to `Conditions` struct in `ResourceModifierRule`.