Merge pull request #46079 from xiangpengzhao/print-allocated-oir

Automatic merge from submit-queue. If you want to cherry-pick this change to another branch, please follow the instructions <a href="https://github.com/kubernetes/community/blob/master/contributors/devel/cherry-picks.md">here</a>.

Display extended resources in node allocated resources

**What this PR does / why we need it**:
Displays ~~opaque integer~~ [extended] resources in node allocated resources of command `kubectl describe node`. This will give users more info about node ~~OIR~~ [extended resources] consumption.

**Which issue this PR fixes** *(optional, in `fixes #<issue number>(, fixes #<issue_number>, ...)` format, will close that issue when PR gets merged)*: fixes #
This is a partially fix of #44271.

**Special notes for your reviewer**:
This PR
- only displays allocated ~~OIR~~ [extended resources] details of node, it doesn't display ~~OIR~~ [extended resources] requests/limits for each pod because it's hard to organize format. I tried to print ~~OIR~~ [extended resources] requests/limits of pods, but some strings have been eaten when a line is too long (the output has been separated into two lines by terminal). I think it's because a `\t` blank can't be show in two lines.
- ~~uses `OIR-foo` instead of `pod.alpha.kubernetes.io/opaque-int-resource-foo` for short.~~
- doesn't display the percentage of ~~OIR~~ [extended resources] usage because I think the percentage is not so meaningful.
- displays each ~~OIR~~ [extended resources] in single rows to be clear.

UPDATE:
Example with default namespace resource:
```
Non-terminated Pods:         (1 in total)
  Namespace                  Name                     CPU Requests  CPU Limits  Memory Requests  Memory Limits
  ---------                  ----                     ------------  ----------  ---------------  -------------
  default                    rc-nginx-single-krp84    1 (33%)       1 (33%)     512Mi (6%)       512Mi (6%)
Allocated resources:
  (Total limits may be over 100 percent, i.e., overcommitted.)
Resource                 Requests    Limits
  --------               --------    ------
  cpu                    1 (33%)     1 (33%)
  memory                 512Mi (6%)  512Mi (6%)
  kubernetes.io/widgets  111         0
```

/cc @ConnorDoyle @soltysh 

ref #44181

**Release note**:

```release-note
Display requests/limits of extended resources in node allocated resources.
```

pkg/printers/internalversion/describe.go

@@ -2979,8 +2979,9 @@ func describeNodeResource(nodeNonTerminatedPodsList *api.PodList, node *api.Node
 			memoryReq.String(), int64(fractionMemoryReq), memoryLimit.String(), int64(fractionMemoryLimit))
 	}
 
-	w.Write(LEVEL_0, "Allocated resources:\n  (Total limits may be over 100 percent, i.e., overcommitted.)\n  CPU Requests\tCPU Limits\tMemory Requests\tMemory Limits\n")
+	w.Write(LEVEL_0, "Allocated resources:\n  (Total limits may be over 100 percent, i.e., overcommitted.)\n")
-	w.Write(LEVEL_1, "------------\t----------\t---------------\t-------------\n")
+	w.Write(LEVEL_1, "Resource\tRequests\tLimits\n")
+	w.Write(LEVEL_1, "--------\t--------\t------\n")
 	reqs, limits := getPodsTotalRequestsAndLimits(nodeNonTerminatedPodsList)
 	cpuReqs, cpuLimits, memoryReqs, memoryLimits := reqs[api.ResourceCPU], limits[api.ResourceCPU], reqs[api.ResourceMemory], limits[api.ResourceMemory]
 	fractionCpuReqs := float64(0)
@@ -2995,9 +2996,21 @@ func describeNodeResource(nodeNonTerminatedPodsList *api.PodList, node *api.Node
 		fractionMemoryReqs = float64(memoryReqs.Value()) / float64(allocatable.Memory().Value()) * 100
 		fractionMemoryLimits = float64(memoryLimits.Value()) / float64(allocatable.Memory().Value()) * 100
 	}
-	w.Write(LEVEL_1, "%s (%d%%)\t%s (%d%%)\t%s (%d%%)\t%s (%d%%)\n",
+	w.Write(LEVEL_1, "%s\t%s (%d%%)\t%s (%d%%)\n",
-		cpuReqs.String(), int64(fractionCpuReqs), cpuLimits.String(), int64(fractionCpuLimits),
+		api.ResourceCPU, cpuReqs.String(), int64(fractionCpuReqs), cpuLimits.String(), int64(fractionCpuLimits))
-		memoryReqs.String(), int64(fractionMemoryReqs), memoryLimits.String(), int64(fractionMemoryLimits))
+	w.Write(LEVEL_1, "%s\t%s (%d%%)\t%s (%d%%)\n",
+		api.ResourceMemory, memoryReqs.String(), int64(fractionMemoryReqs), memoryLimits.String(), int64(fractionMemoryLimits))
+	extResources := make([]string, 0, len(allocatable))
+	for resource := range allocatable {
+		if !helper.IsStandardContainerResourceName(string(resource)) && resource != api.ResourcePods {
+			extResources = append(extResources, string(resource))
+		}
+	}
+	sort.Strings(extResources)
+	for _, ext := range extResources {
+		extRequests, extLimits := reqs[api.ResourceName(ext)], limits[api.ResourceName(ext)]
+		w.Write(LEVEL_1, "%s\t%s\t%s\n", ext, extRequests.String(), extLimits.String())
+	}
 }
 
 func getPodsTotalRequestsAndLimits(podList *api.PodList) (reqs map[api.ResourceName]resource.Quantity, limits map[api.ResourceName]resource.Quantity) {