How do I enable SELinux on an NSP deployer host?

Purpose

Perform this procedure to enable SELinux on the NSP deployer host in an NSP cluster.

Note: You must enable permissive mode on the NSP deployer host before you can enable enforcing mode on the NSP deployer host.

Note: You require root user privileges on the NSP deployer host.

Note: A leading # character in a command line represents the root user prompt, and is not to be included in a typed command.

Note: release-ID in a file path has the following format:

R.r.p-rel.version

where

R.r.p is the NSP release, in the form MAJOR.minor.patch

version is a numeric value

Steps
 
1 

Log in as the root user on the NSP deployer host.

2 

Open a console window.

3 

Enter the following:

# cd /opt/nsp/nsp-k8s-deployer-release-ID/tools/selinux/tools/bin ↵

Check for required OS packages
 
4 

Enter the following:

# ./selinuxenable.sh -c ↵

Any missing OS packages required by SELinux are listed.

5 

If the message indicates that one or more required SELinux packages are not installed, enter the following:

# dnf -y install package_1 package_2 ... package_n ↵

where package_1 package_2 ... package_n are the names of the listed packages

The packages are installed.

Enable permissive mode
 
6 

# ./selinuxenable.sh -p ↵

The SELinux mode is set to permissive.

Apply SELinux labels
 
7 

Enter the following:

# cd /opt/nsp/nsp-k8s-deployer-release-ID/tools ↵

8 

Enter the following:

# selinux/installer/bin/nsp-selinux-config.bash ↵

The script loads the required AVC policy, k3s_nsp_domain.pp, and labels the files and directories named in the policy.

9 

Enter the following to back up the system audit logs:

# cp /var/log/audit/audit.log* backup_location ↵

where backup_location is a secure location on a separate station

10 

Enter the following to delete the system audit logs and thereby clear the SELinux AVC history:

# rm -f /var/log/audit/audit.log* ↵

11 

Enter the following:

# systemctl reboot ↵

The station reboots.

After the reboot, the SELinux labels take effect as SELinux runs in targeted permissive mode in the nsp_domain_t domain.

12 

After the reboot, enter the following to verify that the required processes are running in the nsp_domain_t domain:

# ps -aefZ | grep -v grep | egrep 'k3s|harbor|traefik|coredns|provisioner|registry'↵

Process entries like the following are listed:

system_u:system_r:nsp_domain_t:s0 process_description

13 

If any listed entry does not include nsp_domain_t, contact technical support for assistance.

14 

Enter the following to verify that the policy file is loaded.

# semodule -l | grep k3s_nsp_domain ↵

The policy file is listed, as shown below:

k3s_nsp_domain

15 

If the k3s_nsp_domain policy is not listed, contact technical support for assistance.

16 

Close the open console windows.

End of steps