Disable ConMan if it is blocking access to a node by other means. ConMan runs on the system as a containerized service, and it is enabled by default. However, the use of ConMan to connect to a node blocks access to that node by other Serial over LAN (SOL) utilities or by a virtual KVM.
For information about how ConMan works, see ConMan.
The Cray command line interface (CLI) tool is initialized and configured on the system. See Configure the Cray CLI.
Disable the console services.
Because the console services are looking for new hardware and continually verifying that console connections are established with all the nodes in the system, these services must be disabled to stop automatic console connections.
Follow the directions in Disable ConMan After the System Software Installation to disable the automatic console connections.
Disable the SOL session.
Even after the console services are disabled, the ConMan SOL session might need to be directly disabled using ipmitool.
Note: This is only required for River nodes because Mountain hardware does not use IPMI.
read -sis used to prevent the password from appearing in the command history.
ncn# USERNAME=root
ncn# read -r -s -p "BMC ${USERNAME} password: " IPMI_PASSWORD
ncn# export IPMI_PASSWORD
ncn# ipmitool -I lanplus -H BMC_IP -U "${USERNAME}" -E sol deactivate
Restart the console services.
Refer to the directions in Disable ConMan After the System Software Installation to restart the console services when all work is complete.