定位思路

device-plugin主要负责：

1.npu设备发现

2.npu设备分配

整个过程的定位思路如下图所示：

在该图中，问题处理的逻辑如下：

1. 查看Node状态。

   kubectl descirbe node [nodeName]

   查看Labels中是否是对应NPU型号的标签，Allocatable中数量是否足够。

   查看示例如下：

   root@ubuntu:~# kubectl describe node ubuntu-185
   Name:               ubuntu-185
   Roles:              worker
   Labels:             accelerator=huawei-Ascend910
                       accelerator-type=card
   ...
                       
   Annotations:        huawei.com/Ascend910: Ascend910-0,Ascend910-1
                       kubeadm.alpha.kubernetes.io/cri-socket: /var/run/dockershim.sock
   ...
   Capacity:
     cpu:                   56
     ephemeral-storage:     431259672Ki
     huawei.com/Ascend910:  2
   ...
   Allocatable:
     cpu:                   56
     ephemeral-storage:     397448913058
     huawei.com/Ascend910:  2
   ...
    

2. 查看Ascend Device Plugin的ds状态。

   kubectl describe ds [dsName] -n kube-system

   查看ds的Node-Selector是否和1中一致。

   查看示例如下：

   root@ubuntu:/home/yaml# kubectl describe ds ascend-device-plugin-daemonset -n kube-system
   Name:           ascend-device-plugin-daemonset
   Selector:       name=ascend-device-plugin-ds
   Node-Selector:  accelerator=huawei-Ascend910
   Labels:         <none>
   Annotations:    deprecated.daemonset.template.generation: 1
                   kubectl.kubernetes.io/last-applied-configuration:
                     {"apiVersion":"apps/v1","kind":"DaemonSet","metadata":{"annotations":{},"name":"ascend-device-plugin-daemonset","namespace":"kube-system"}...
   ...

3. 查看Pod状态。

   kubectl describe po [podName] -n kube-system

   查看示例如下：

   root@ubuntu:/home/yaml# kubectl describe po mindx-dls-2p-default-2p-0 -n vcjob
   Name:         mindx-dls-2p-default-2p-0
   Namespace:    vcjob
   Priority:     0
   Node:         ubuntu/51.38.67.231
   Start Time:   Wed, 23 Dec 2020 22:14:27 -0500
   Labels:       app=tf
                 ring-controller.atlas=ascend-910
                 volcano.sh/job-name=mindx-dls-2p
                 volcano.sh/job-namespace=vcjob
   Annotations:  ascend.kubectl.kubernetes.io/ascend-910-configuration:
                   {"pod_name":"0","server_id":"51.38.67.231","devices":[{"device_id":"1","device_ip":"192.168.101.100"},{"device_id":"4","device_ip":"192.16...
                 cni.projectcalico.org/podIP: 192.168.194.75/32
                 cni.projectcalico.org/podIPs: 192.168.194.75/32
                 huawei.com/Ascend910: Ascend910-0,Ascend910-1
                 predicate-time: 18446744073709551615
                 scheduling.k8s.io/group-name: mindx-dls-2p
                 volcano.sh/job-name: mindx-dls-2p
                 volcano.sh/job-version: 0
                 volcano.sh/task-spec: default-2p

   可以发现Annotations的这个字段ascend.kubectl.kubernetes.io/ascend-910-configuration的值是完整且正确的。如果不正确，可参考hccl.json文件没有生成定位并处理。