Disable SCTP Autoload in the Kernel

The SCTP module is autoloaded in the StarlingX kernel by default. Thus, Service Parameter sctp_autoload is defaulted to “enabled”.

To disable SCTP in the kernel of all hosts in the system, set the system service parameter sctp_autoload to “disabled” and apply the service-parameter change, using the following commands, executed on the active controller.

~(keystone_admin)]$ system service-parameter-modify platform config sctp_autoload=disabled
~(keystone_admin)]$ system service-parameter-apply platform

To persist the service parameter change, all hosts need to be locked and unlocked, using the following commands for each host depending on the deployed configuration.

For AIO-SX deployments.

~(keystone_admin)$ system host-lock controller-0
~(keystone_admin)$ system host-unlock controller-0

For AIO-DX and Standard deployments, after controller-1 is locked/unlocked swact controller-0 to make controller-1 the active node. The next set of commands are executed on controller-0 node.

~(keystone_admin)$ system host-lock controller-1
~(keystone_admin)$ system host-unlock controller-1
~(keystone_admin)$ system host-swact controller-0

On controller-1, after controller-0 is locked/unlocked swact controller-1 to go back to controller-0 as the active node. The next set of commands are executed on controller-1 node.

~(keystone_admin)$ system host-lock controller-0
~(keystone_admin)$ system host-unlock controller-0
~(keystone_admin)$ system host-swact controller-1

For each worker node in the configuration, execute the commands from controller-0.

~(keystone_admin)$ system host-lock worker-0
~(keystone_admin)$ system host-unlock worker-0

To verify if SCTP modules are unloaded for a host, ssh into a host after lock/unlock and check the output of the following commands.

~(keystone_admin)$ sysadmin@controller-0:~$ lsmod | grep sctp

The output must be empty if SCTP is unloaded.

To check if this configuration persists for a host across reboots, the command below should give an empty response.

~(keystone_admin)$ sysadmin@controller-0:~$ ls /etc/modules-load.d/ | grep sctp

To Enable SCTP Autoload in the Kernel.

~(keystone_admin)]$ system service-parameter-modify platform config sctp_autoload=enabled
~(keystone_admin)]$ system service-parameter-apply platform

To enable the SCTP module autoload in the kernel, execute the above command on the active controller and repeat the host lock/unlock process for every host.

~(keystone_admin)$ system host-lock controller-0
~(keystone_admin)$ system host-unlock controller-0

To verify if the SCTP module autoloads for a host.

~(keystone_admin)$ ls /etc/modules-load.d/ | grep sctp sctp.conf