virtnodedevd_selinux(8)

💅 virtnodedevd_selinux — the manual, but make it make sense

okay bestie, so this is the virtnodedevd_selinux page from the SELinux Policy virtnodedevd section of the manual (section 8, iykyk). it's giving "niche but iconic" and we're gonna get through it together, no cap 🫶

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✨ NAME ✨

virtnodedevd_selinux — literally the Security Enhanced Linux Policy for the virtnodedevd processes. that's it, that's the vibe 💅

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🌸 DESCRIPTION 🌸

so Security-Enhanced Linux secures the virtnodedevd processes via flexible mandatory access control. flexin' 💪

the virtnodedevd processes execute with the virtnodedevd_t SELinux type. you can check if you have these processes running by executing the ps command with the -Z qualifier.

for example:

ps -eZ | grep virtnodedevd_t

run it, screenshot it, send it to the group chat, whatever 😌

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🦋 ENTRYPOINTS 🦋

the virtnodedevd_t SELinux type can be entered via the virtnodedevd_exec_t file type.

the default entrypoint paths for the virtnodedevd_t domain are the following:

/usr/bin/virtnodedevd

one path. one icon. main character energy 👑

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🔥 PROCESS TYPES 🔥

SELinux defines process types (domains) for each process running on the system.

you can see the context of a process using the -Z option to ps.

policy governs the access confined processes have to files. SELinux virtnodedevd policy is very flexible, allowing users to setup their virtnodedevd processes in as secure a method as possible. secure but chill, we love that for us ✨

the following process types are defined for virtnodedevd:

virtnodedevd_t

Note: semanage permissive -a virtnodedevd_t can be used to make the process type virtnodedevd_t permissive. SELinux does not deny access to permissive process types, but the AVC (SELinux denials) messages are still generated. so it's not a free pass, it's just a "we're still watching you" pass 👀

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🎀 BOOLEANS 🎀

SELinux policy is customizable based on least access required. virtnodedevd policy is extremely flexible and has several booleans that allow you to manipulate the policy and run virtnodedevd with the tightest access possible. tightest access = bestie behavior fr fr

if you want to dontaudit all daemons scheduling requests (setsched, sys_nice), you must turn on the daemons_dontaudit_scheduling boolean. enabled by default.

setsebool -P daemons_dontaudit_scheduling 1

if you want to allow all domains to execute in fips_mode, you must turn on the fips_mode boolean. enabled by default.

setsebool -P fips_mode 1

two booleans, both already enabled, both slaying by default 💅

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🌈 MANAGED FILES 🌈

the SELinux process type virtnodedevd_t can manage files labeled with the following file types. the paths listed are the default paths for these file types. note the processes UID still need to have DAC permissions — SELinux isn't out here doing DAC's job, it's a team effort 🫶

cluster_conf_t

/etc/cluster(/.*)?

cluster_var_lib_t

/var/lib/pcsd(/.*)?
/var/lib/cluster(/.*)?
/var/lib/openais(/.*)?
/var/lib/pengine(/.*)?
/var/lib/corosync(/.*)?
/usr/lib/heartbeat(/.*)?
/var/lib/heartbeat(/.*)?
/var/lib/pacemaker(/.*)?

cluster_var_run_t

/run/crm(/.*)?
/run/cman_.*
/run/rsctmp(/.*)?
/run/aisexec.*
/run/heartbeat(/.*)?
/run/pcsd-ruby.socket
/run/corosync-qnetd(/.*)?
/run/corosync-qdevice(/.*)?
/run/pcsd.socket
/run/corosync.pid
/run/cpglockd.pid
/run/rgmanager.pid
/run/cluster/rgmanager.sk

root_t

/sysroot/.aleph-version.json
/sysroot/ostree/deploy/.*-atomic/deploy(/.*)?
/
/initrd
/var/lib/ntp

virt_log_t

/var/log/log(/.*)?
/var/log/vdsm(/.*)?
/var/log/libvirt(/.*)?
/var/log/virtqemud.log
/var/log/virtproxyd.log
/var/log/virtsecretd.log
/var/log/virtnetworkd.log
/var/log/virtnodedevd.log
/var/log/virtstoraged.log
/var/log/virtnwfilterd.log
/var/log/virtinterfaced.log
/run/lock/xl

okay that's a lot of paths but we read every single one, we don't skip, periodt 💖

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💜 FILE CONTEXTS 💜

SELinux requires files to have an extended attribute to define the file type.

you can see the context of a file using the -Z option to ls.

policy governs the access confined processes have to these files. SELinux virtnodedevd policy is very flexible allowing users to setup their virtnodedevd processes in as secure a method as possible. (yes we said this twice, it's important, let it sink in 🧚)

STANDARD FILE CONTEXT

SELinux defines the file context types for the virtnodedevd. if you wanted to store files with these types in a different paths, you need to execute the semanage command to specify alternate labeling and then use restorecon to put the labels on disk.

semanage fcontext -a -t virtnodedevd_var_run_t '/srv/virtnodedevd/content(/.*)?'
restorecon -R -v /srv/myvirtnodedevd_content

Note: SELinux often uses regular expressions to specify labels that match multiple files. regex girlies rise 🙈

the following file types are defined for virtnodedevd:

• virtnodedevd_exec_t — set files with the virtnodedevd_exec_t type, if you want to transition an executable to the virtnodedevd_t domain.
• virtnodedevd_lock_t — set files with the virtnodedevd_lock_t type, if you want to treat the files as virtnodedevd lock data, stored under the /var/lock directory.
• virtnodedevd_t — set files with the virtnodedevd_t type, if you want to treat the files as virtnodedevd data.
• virtnodedevd_var_run_t — set files with the virtnodedevd_var_run_t type, if you want to store the virtnodedevd files under the /run or /var/run directory.

paths:

/run/libvirt/nodedev(/.*)?, /run/virtnodedevd.pid, /run/libvirt/virtnodedevd-sock, /run/libvirt/virtnodedevd-sock-ro, /run/libvirt/virtnodedevd-admin-sock

Note: file context can be temporarily modified with the chcon command. if you want to permanently change the file context you need to use the semanage fcontext command. this will modify the SELinux labeling database. you will need to use restorecon to apply the labels. temporary vs permanent, know the difference bestie 😭

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⭐ COMMANDS ⭐

semanage fcontext can also be used to manipulate default file context mappings.

semanage permissive can also be used to manipulate whether or not a process type is permissive.

semanage module can also be used to enable/disable/install/remove policy modules.

semanage boolean can also be used to manipulate the booleans.

system-config-selinux is a GUI tool available to customize SELinux policy settings. a whole GUI, for the girlies who like clicking 💅

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👑 AUTHOR 👑

this manual page was auto-generated using sepolicy manpage. the robot did it, we just made it cute 🤖✨

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🍓 SEE ALSO 🍓

selinux(8), virtnodedevd(8), semanage(8), restorecon(8), chcon(1), sepolicy(8), setsebool(8)

go read those next, i believe in you 🫶

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and that's a wrap on the virtnodedevd page, dated 26-10-06, living in the virtnodedevd_selinux(8) section. mwah, go configure something iconic 💖🎀🦋