Merge pull request #45924 from janetkuo/daemonset-history

Automatic merge from submit-queue

Implement Daemonset history

~Depends on #45867 (the 1st commit, ignore it when reviewing)~ (already merged)

Ref https://github.com/kubernetes/community/pull/527/ and https://github.com/kubernetes/community/pull/594

@kubernetes/sig-apps-api-reviews @kubernetes/sig-apps-pr-reviews @erictune @kow3ns @lukaszo @kargakis 

---

TODOs:
- [x] API changes
  - [x] (maybe) Remove rollback subresource if we decide to do client-side rollback 
- [x] deployment controller 
  - [x] controller revision
    - [x] owner ref (claim & adoption)
    - [x] history reconstruct (put revision number, hash collision avoidance)
    - [x] de-dup history and relabel pods
    - [x] compare ds template with history 
  - [x] hash labels (put it in controller revision, pods, and maybe deployment)
  - [x] clean up old history 
  - [x] Rename status.uniquifier when we reach consensus in #44774 
- [x] e2e tests 
- [x] unit tests 
  - [x] daemoncontroller_test.go 
  - [x] update_test.go 
  - [x] ~(maybe) storage_test.go // if we do server side rollback~

kubectl part is in #46144

--- 

**Release note**:

```release-note
```

api/openapi-spec/swagger.json

@@ -52564,6 +52564,11 @@
       "type": "integer",
       "format": "int32"
      },
+     "revisionHistoryLimit": {
+      "description": "The number of old history to retain to allow rollback. This is a pointer to distinguish between explicit zero and not specified. Defaults to 10.",
+      "type": "integer",
+      "format": "int32"
+     },
      "selector": {
       "description": "A label query over pods that are managed by the daemon set. Must match in order to be controlled. If empty, defaulted to labels on Pod template. More info: https://kubernetes.io/docs/concepts/overview/working-with-objects/labels/#label-selectors",
       "$ref": "#/definitions/io.k8s.apimachinery.pkg.apis.meta.v1.LabelSelector"
@@ -52573,7 +52578,7 @@
       "$ref": "#/definitions/io.k8s.kubernetes.pkg.api.v1.PodTemplateSpec"
      },
      "templateGeneration": {
-      "description": "A sequence number representing a specific generation of the template. Populated by the system. It can be set only during the creation.",
+      "description": "DEPRECATED. A sequence number representing a specific generation of the template. Populated by the system. It can be set only during the creation.",
       "type": "integer",
       "format": "int64"
      },
@@ -52592,6 +52597,11 @@
      "numberReady"
     ],
     "properties": {
+     "collisionCount": {
+      "description": "Count of hash collisions for the DaemonSet. The DaemonSet controller uses this field as a collision avoidance mechanism when it needs to create the name for the newest ControllerRevision.",
+      "type": "integer",
+      "format": "int64"
+     },
      "currentNumberScheduled": {
       "description": "The number of nodes that are running at least 1 daemon pod and are supposed to run the daemon pod. More info: https://kubernetes.io/docs/concepts/workloads/controllers/daemonset/",
       "type": "integer",

api/swagger-spec/extensions_v1beta1.json

@@ -7117,7 +7117,12 @@
      "templateGeneration": {
       "type": "integer",
       "format": "int64",
-      "description": "A sequence number representing a specific generation of the template. Populated by the system. It can be set only during the creation."
+      "description": "DEPRECATED. A sequence number representing a specific generation of the template. Populated by the system. It can be set only during the creation."
+     },
+     "revisionHistoryLimit": {
+      "type": "integer",
+      "format": "int32",
+      "description": "The number of old history to retain to allow rollback. This is a pointer to distinguish between explicit zero and not specified. Defaults to 10."
      }
     }
    },
@@ -9159,6 +9164,11 @@
       "type": "integer",
       "format": "int32",
       "description": "The number of nodes that should be running the daemon pod and have none of the daemon pod running and available (ready for at least spec.minReadySeconds)"
+     },
+     "collisionCount": {
+      "type": "integer",
+      "format": "int64",
+      "description": "Count of hash collisions for the DaemonSet. The DaemonSet controller uses this field as a collision avoidance mechanism when it needs to create the name for the newest ControllerRevision."
      }
     }
    },