红帽全球峰会19.9. SELinux booleans for virtualization
RHEL 10 provides the sVirt feature, which is a set of specialized SELinux booleans that are automatically enabled on a host with SELinux in Enforcing mode.
For fine-grained configuration of virtual machines security on a RHEL 10 system, you can configure SELinux booleans on the host to ensure the hypervisor acts in a specific way.
To list all virtualization-related booleans and their statuses, use the getsebool -a | grep virt command:
$ getsebool -a | grep virt
[...]
virt_sandbox_use_netlink --> off
virt_sandbox_use_sys_admin --> off
virt_transition_userdomain --> off
virt_use_comm --> off
virt_use_execmem --> off
virt_use_fusefs --> off
[...]
To enable a specific boolean, use the setsebool -P boolean_name on command as root. To disable a boolean, use setsebool -P boolean_name off.
The following table lists virtualization-related booleans available in RHEL 10 and what they do when enabled:
| SELinux Boolean | Description |
|---|---|
| staff_use_svirt | Enables non-root users to create and transition VMs to sVirt. |
| unprivuser_use_svirt | Enables unprivileged users to create and transition VMs to sVirt. |
| virt_sandbox_use_audit | Enables sandbox containers to send audit messages. |
| virt_sandbox_use_netlink | Enables sandbox containers to use netlink system calls. |
| virt_sandbox_use_sys_admin | Enables sandbox containers to use sys_admin system calls, such as mount. |
| virt_transition_userdomain | Enables virtual processes to run as user domains. |
| virt_use_comm | Enables virt to use serial/parallel communication ports. |
| virt_use_execmem | Enables confined virtual guests to use executable memory and executable stack. |
| virt_use_fusefs | Enables virt to read FUSE mounted files. |
| virt_use_nfs | Enables virt to manage NFS mounted files. |
| virt_use_rawip | Enables virt to interact with rawip sockets. |
| virt_use_samba | Enables virt to manage CIFS mounted files. |
| virt_use_sanlock | Enables confined virtual guests to interact with the sanlock. |
| virt_use_usb | Enables virt to use USB devices. |
| virt_use_xserver | Enables virtual machine to interact with the X Window System. |
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