allow minikube status to display for one node

[sharifelgamal]

For a non-standard status format in a multinode cluster, we were concatenating the results for all the nodes in a way that was impossible to digest. Now we default to only showing the status of the control plane for any non-standard status format.
For example, in a 3 node cluster:
Before:

minikube status --format {{.Host}}
RunningRunningRunning

After:

minikube status --format {{.Host}}
Running

You can also explicitly specify a node to check:

minikube status --format {{.Host}} --node m02
Running

minikube status --node m02
minikube-m02
type: Worker
host: Running
kubelet: Running

The standard format works like before:

minikube status
minikube
type: Control Plane
host: Running
kubelet: Running
apiserver: Running
kubeconfig: Configured

minikube-m02
type: Worker
host: Running
kubelet: Running

minikube-m03
type: Worker
host: Running
kubelet: Running

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: sharifelgamal

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[medyagh]

/ok-to-test

[minikube-pr-bot]

kvm2 Driver
docker Driver

[minikube-pr-bot]

kvm2 Driver
Times for minikube: [66.998330258 64.34758321700001 62.80530103099999]
Average time for minikube: 64.717071502

Times for Minikube (PR 8238): [64.089207605 62.96519568000001 60.88969604099999]
Average time for Minikube (PR 8238): 62.648033108666674

Averages Time Per Log

+--------------------------------+-----------+--------------------+
|              LOG               | MINIKUBE  | MINIKUBE (PR 8238) |
+--------------------------------+-----------+--------------------+
| * minikube v1.10.1 on Debian   |  0.059019 |           0.058756 |
|                           9.11 |           |                    |
| * Using the kvm2 driver based  |  0.020090 |           0.021433 |
| on existing profile            |           |                    |
| * Starting control plane node  |  0.003111 |           0.003127 |
| minikube in cluster minikube   |           |                    |
| * Creating kvm2 VM (CPUs=2,    | 41.134854 |          38.758810 |
| Memory=3700MB, Disk=20000MB)   |           |                    |
| ...                            |           |                    |
| * Preparing Kubernetes v1.18.2 | 21.815695 |          21.404054 |
| on Docker 19.03.8 ...          |           |                    |
| * Verifying Kubernetes         |  1.349879 |           1.316889 |
| components...                  |           |                    |
| * Enabled addons:              |  0.258754 |           0.998230 |
| default-storageclass,          |           |                    |
| storage-provisioner            |           |                    |
| * Done! kubectl is now         |  0.072973 |           0.081975 |
| configured to use "minikube"   |           |                    |
|                                |  0.002696 |           0.004759 |
+--------------------------------+-----------+--------------------+

docker Driver
Times for minikube: [27.306738238999998 26.204489027999998 26.862606770000006]
Average time for minikube: 26.791278012333333

Times for Minikube (PR 8238): [25.830401988000002 27.750777286 26.500150622]
Average time for Minikube (PR 8238): 26.693776632

Averages Time Per Log

+----------------------------------------+-----------+--------------------+
|                  LOG                   | MINIKUBE  | MINIKUBE (PR 8238) |
+----------------------------------------+-----------+--------------------+
| * minikube v1.10.1 on Debian           |  0.071169 |           0.068359 |
|                                   9.11 |           |                    |
| * Using the docker driver              |  0.002635 |           0.002733 |
| based on existing profile              |           |                    |
| * Starting control plane node          |  0.059537 |           0.059083 |
| minikube in cluster minikube           |           |                    |
| * Creating docker container            |  7.787103 |           7.570452 |
| (CPUs=2, Memory=3700MB) ...            |           |                    |
| * Preparing Kubernetes v1.18.2         |  0.116070 |           0.117165 |
| on Docker 19.03.2 ...                  |           |                    |
|   -                                    | 17.821675 |          17.763396 |
| kubeadm.pod-network-cidr=10.244.0.0/16 |           |                    |
| * Verifying Kubernetes                 |  0.861725 |           1.044412 |
| components...                          |           |                    |
| * Enabled addons:                      |  0.002742 |           0.002519 |
| default-storageclass,                  |           |                    |
| storage-provisioner                    |           |                    |
| * Done! kubectl is now                 |  0.064878 |           0.062270 |
| configured to use "minikube"           |           |                    |
|                                        |  0.003743 |           0.003386 |
+----------------------------------------+-----------+--------------------+

[minikube-pr-bot]

kvm2 Driver
Times for minikube: [64.803844119 68.28938041 63.331029786]
Average time for minikube: 65.47475143833333

Times for Minikube (PR 8238): [63.27453714600001 64.63990455700001 63.795858537]
Average time for Minikube (PR 8238): 63.903433413333325

Averages Time Per Log

+--------------------------------+-----------+--------------------+
|              LOG               | MINIKUBE  | MINIKUBE (PR 8238) |
+--------------------------------+-----------+--------------------+
| * minikube v1.10.1 on Debian   |  0.061602 |           0.059521 |
|                           9.11 |           |                    |
| * Using the kvm2 driver based  |  0.020114 |           0.021788 |
| on existing profile            |           |                    |
| * Starting control plane node  |  0.003463 |           0.003264 |
| minikube in cluster minikube   |           |                    |
| * Creating kvm2 VM (CPUs=2,    | 40.516453 |          40.168248 |
| Memory=3700MB, Disk=20000MB)   |           |                    |
| ...                            |           |                    |
| * Preparing Kubernetes v1.18.2 | 22.771971 |          21.617265 |
| on Docker 19.03.8 ...          |           |                    |
| * Verifying Kubernetes         |  1.518494 |           1.271032 |
| components...                  |           |                    |
| * Enabled addons:              |  0.491787 |           0.677067 |
| default-storageclass,          |           |                    |
| storage-provisioner            |           |                    |
| * Done! kubectl is now         |  0.087084 |           0.081368 |
| configured to use "minikube"   |           |                    |
|                                |  0.003784 |           0.003879 |
+--------------------------------+-----------+--------------------+

docker Driver
Times for minikube: [27.015474264999998 25.611595513999998 25.598178234000002]
Average time for minikube: 26.075082671

Times for Minikube (PR 8238): [26.486052773999997 26.979399301 27.232815487]
Average time for Minikube (PR 8238): 26.899422520666665

Averages Time Per Log

+----------------------------------------+-----------+--------------------+
|                  LOG                   | MINIKUBE  | MINIKUBE (PR 8238) |
+----------------------------------------+-----------+--------------------+
| * minikube v1.10.1 on Debian           |  0.074788 |           0.074918 |
|                                   9.11 |           |                    |
| * Using the docker driver              |  0.002959 |           0.002483 |
| based on existing profile              |           |                    |
| * Starting control plane node          |  0.058268 |           0.058633 |
| minikube in cluster minikube           |           |                    |
| * Creating docker container            |  7.738406 |           7.624213 |
| (CPUs=2, Memory=3700MB) ...            |           |                    |
| * Preparing Kubernetes v1.18.2         |  0.118152 |           0.119939 |
| on Docker 19.03.2 ...                  |           |                    |
|   -                                    | 16.785658 |          17.732441 |
| kubeadm.pod-network-cidr=10.244.0.0/16 |           |                    |
| * Verifying Kubernetes                 |  1.203051 |           1.120840 |
| components...                          |           |                    |
| * Enabled addons:                      |  0.020968 |           0.093276 |
| default-storageclass,                  |           |                    |
| storage-provisioner                    |           |                    |
| * Done! kubectl is now                 |  0.070090 |           0.066712 |
| configured to use "minikube"           |           |                    |
|                                        |  0.002744 |           0.005969 |
+----------------------------------------+-----------+--------------------+