Access_Compute_Node_Logs.md

Access Compute Node Logs

This procedure shows how the ConMan utility can be used to retrieve compute node logs.

Prerequisites

The user performing this procedure needs to have access permission to the cray-console-operator pod.

Limitations

Encryption of compute node logs is not enabled, so the passwords may be passed in clear text.

Procedure

1. Log on to a Kubernetes master or worker node.

2. Retrieve the cray-console-operator pod ID.

   ncn-m001# CONPOD=$(kubectl get pods -n services \
   -o wide|grep cray-console-operator|awk '{print $1}')
   
   ncn-m001# echo $CONPOD
   cray-console-operator-79bf95964-qpcpp
   

3. Log on to the pod.

   ncn-m001# kubectl exec -it -n services $CONPOD -- sh
   

4. Go to the log directory.

   # cd /var/log/conman
   

5. List the directory contents to identify node IDs.

   /var/log/conman # ls -la
   total 44
   -rw------- 1 root root 1415 Nov 30 20:00 console.NODE_ID
   ...
   

6. Use the node's ID to retrieve its logs.

   /var/log/conman # tail console.NODE_ID
   

7. Exit out of the pod.

   /var/log/conman # exit
   ncn-m001#