使用 Red Hat OpenShift on IBM Cloud (ROKS) 的 oc 命令来查看 Worker Pool 相关信息
在IBM云上的Red Hat OpenShift（ROKS）中，Worker Pool是OpenShift中Worker Node的高级概念之一。ROKS用户可以通过设置Flavor和VLAN等参数来创建Worker Pool，并部署满足工作负载需求的Worker Node。
关于 Worker Pool 的信息可以在 ROKS 的 Portal 画面或者通过 ibmcloud oc worker-pool 命令来确认。参考链接：https://cloud.ibm.com/docs/openshift?topic=openshift-kubernetes-service-cli#worker-pool
$ ibmcloud plugin list
Listing installed plug-ins...
Plugin Name Version Status Private endpoints supported
container-service[kubernetes-service] 1.0.408 false
$ ibmcloud oc worker-pool help
NAME:
ibmcloud ks worker-pool - View and modify worker pools for a cluster.
USAGE:
ibmcloud ks worker-pool command [arguments...] [command options]
COMMANDS:
create Add a worker pool to a cluster. No worker nodes are created until zones are added to the worker pool.
get List the details of a worker pool.
label Set and remove custom Kubernetes labels for all worker nodes in a worker pool.
ls List all worker pools in a cluster.
rebalance Rebalance a worker pool in a cluster. Rebalancing adds worker nodes so that the worker pool has the same number of nodes per zone that you specified.
resize Resize the worker pool to the number of workers per zone that you specify.
rm Remove a worker pool from a cluster.
taint Set and remove Kubernetes taints for all worker nodes in a worker pool.
zones View the zones attached to a worker pool.
Enter 'ibmcloud ks worker-pool help [command]' for more information about a command.
一种方法是使用 OpenShift Console 或 oc 命令执行各种 OpenShift 操作。在这里，我们将介绍如何使用 oc 命令检查与 Worker Node 相关的 Worker Pool 的各种信息。
确认工人池相关信息。
Worker Pool 関連情報は、Worker Node の Label ( .metadata.labels ) で確認することが可能です。
$ oc get node -o name
node/90.131.311.131
node/90.131.311.132
node/90.131.311.133
node/90.131.311.136
node/90.131.311.142
node/90.131.311.145
node/90.131.311.155
node/90.131.311.165
node/90.131.311.167
node/90.131.311.169
node/90.131.311.171
node/90.131.311.182
node/90.131.311.183
node/90.131.311.186
$ oc get node/90.131.311.131 -o jsonpath='{.metadata.labels}' | jq -r .
{
"arch": "amd64",
"beta.kubernetes.io/arch": "amd64",
"beta.kubernetes.io/instance-type": "mb4c.20x192.encrypted",
"beta.kubernetes.io/os": "linux",
"failure-domain.beta.kubernetes.io/region": "au-syd",
"failure-domain.beta.kubernetes.io/zone": "syd04",
"ibm-cloud.kubernetes.io/encrypted-docker-data": "true",
"ibm-cloud.kubernetes.io/external-ip": "192.168.332.25",
"ibm-cloud.kubernetes.io/iaas-provider": "softlayer",
"ibm-cloud.kubernetes.io/internal-ip": "90.131.311.131",
"ibm-cloud.kubernetes.io/machine-type": "mb4c.20x192.encrypted",
"ibm-cloud.kubernetes.io/os": "REDHAT_7_64",
"ibm-cloud.kubernetes.io/region": "au-syd",
"ibm-cloud.kubernetes.io/sgx-enabled": "false",
"ibm-cloud.kubernetes.io/worker-id": "kube-c9ecepez0ho14k0xyq10-roks-mypool1-00000dca",
"ibm-cloud.kubernetes.io/worker-pool-id": "c9ecepez0ho14k0xyq10-9de66b6",
"ibm-cloud.kubernetes.io/worker-pool-name": "mypool1",
"ibm-cloud.kubernetes.io/worker-version": "4.6.56_1579_openshift",
"ibm-cloud.kubernetes.io/zone": "syd04",
"kubernetes.io/arch": "amd64",
"kubernetes.io/hostname": "90.131.311.131",
"kubernetes.io/os": "linux",
"node-role.kubernetes.io/master": "",
"node-role.kubernetes.io/worker": "",
"node.kubernetes.io/instance-type": "mb4c.20x192.encrypted",
"node.openshift.io/os_id": "rhel",
"privateVLAN": "0123456",
"publicVLAN": "9876543",
"topology.kubernetes.io/region": "au-syd",
"topology.kubernetes.io/zone": "syd04"
}
顺便提一句，ROKS默认设置的标签无法删除，不支持该操作。请参考此链接：https://cloud.ibm.com/docs/containers?topic=containers-add_workers
请注意：不要删除由mypool2提供的工作池和工作节点标签，因为这些标签对于工作池的正常运行是必需的。只需删除您之前添加的自定义标签即可。
使用 oc 命令显示Worker Pool相关信息
可以使用oc get node命令的-o custom-columns或-o custom-columns-file选项。
$ cat CustomColumnFile.txt
NAME REGION ZONE FLAVOR WORKER_ID WPOOL WPOOL_ID PRIVATE_VLAN PUBLIC_VLAN
.metadata.name .metadata.labels.ibm-cloud\.kubernetes\.io/region .metadata.labels.ibm-cloud\.kubernetes\.io/zone .metadata.labels.ibm-cloud\.kubernetes\.io/machine-type .metadata.labels.ibm-cloud\.kubernetes\.io/worker-id .metadata.labels.ibm-cloud\.kubernetes\.io/worker-pool-name .metadata.labels.ibm-cloud\.kubernetes\.io/worker-pool-id .metadata.labels.privateVLAN .metadata.labels.publicVLAN
$ oc get node -o custom-columns-file=CustomColumnFile.txt --sort-by=".metadata.labels.ibm-cloud\.kubernetes\.io/worker-pool-name"
NAME REGION ZONE FLAVOR WORKER_ID WPOOL WPOOL_ID PRIVATE_VLAN PUBLIC_VLAN
90.131.311.145 au-syd syd04 mb4c.20x192.encrypted kube-c9ecepez0ho14k0xyq10-roks-mypool1-00000b53 mypool1 c9ecepez0ho14k0xyq10-9de66b6 0123456 9876543
90.131.311.171 au-syd syd04 mb4c.20x192.encrypted kube-c9ecepez0ho14k0xyq10-roks-mypool1-00000c7e mypool1 c9ecepez0ho14k0xyq10-9de66b6 0123456 9876543
90.131.311.133 au-syd syd04 mb4c.20x192.encrypted kube-c9ecepez0ho14k0xyq10-roks-mypool1-00000857 mypool1 c9ecepez0ho14k0xyq10-9de66b6 0123456 9876543
90.131.311.165 au-syd syd04 mb4c.20x192.encrypted kube-c9ecepez0ho14k0xyq10-roks-mypool1-00000a81 mypool1 c9ecepez0ho14k0xyq10-9de66b6 0123456 9876543
90.131.311.155 au-syd syd04 mb4c.20x192.encrypted kube-c9ecepez0ho14k0xyq10-roks-mypool1-00000e76 mypool1 c9ecepez0ho14k0xyq10-9de66b6 0123456 9876543
90.131.311.131 au-syd syd04 mb4c.20x192.encrypted kube-c9ecepez0ho14k0xyq10-roks-mypool1-00000dca mypool1 c9ecepez0ho14k0xyq10-9de66b6 0123456 9876543
90.131.311.186 au-syd syd04 mb4c.20x192.encrypted kube-c9ecepez0ho14k0xyq10-roks-mypool1-000009e8 mypool1 c9ecepez0ho14k0xyq10-9de66b6 0123456 9876543
90.131.311.142 au-syd syd04 m3c.16x128.encrypted kube-c9ecepez0ho14k0xyq10-roks-mypool2-000007a4 mypool2 c9ecepez0ho14k0xyq10-30b0e45 0123456 9876543
90.131.311.167 au-syd syd04 m3c.16x128.encrypted kube-c9ecepez0ho14k0xyq10-roks-mypool2-0000038a mypool2 c9ecepez0ho14k0xyq10-30b0e45 0123456 9876543
90.131.311.169 au-syd syd04 m3c.16x128.encrypted kube-c9ecepez0ho14k0xyq10-roks-mypool2-000001f5 mypool2 c9ecepez0ho14k0xyq10-30b0e45 0123456 9876543
90.131.311.132 au-syd syd04 m3c.16x128.encrypted kube-c9ecepez0ho14k0xyq10-roks-mypool2-000002ad mypool2 c9ecepez0ho14k0xyq10-30b0e45 0123456 9876543
90.131.311.182 au-syd syd04 m3c.16x128.encrypted kube-c9ecepez0ho14k0xyq10-roks-mypool2-00000509 mypool2 c9ecepez0ho14k0xyq10-30b0e45 0123456 9876543
90.131.311.183 au-syd syd04 m3c.16x128.encrypted kube-c9ecepez0ho14k0xyq10-roks-mypool2-000004b0 mypool2 c9ecepez0ho14k0xyq10-30b0e45 0123456 9876543
90.131.311.136 au-syd syd04 m3c.16x128.encrypted kube-c9ecepez0ho14k0xyq10-roks-mypool2-000006ed mypool2 c9ecepez0ho14k0xyq10-30b0e45 0123456 9876543
