rdisc_selinux(8)

🌸 NAME 🌸

rdisc_selinux — Security Enhanced Linux Policy for the rdisc processes. Yep bestie, this is the rdisc_selinux(8) page, and we're about to make SELinux make sense 💅✨

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✨ DESCRIPTION ✨

Security-Enhanced Linux secures the rdisc processes via flexible mandatory access control. It's giving "SELinux is the main character of process security" energy, no cap.

The rdisc processes execute with the rdisc_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 rdisc_t

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🚪 ENTRYPOINTS 🚪

The rdisc_t SELinux type can be entered via the rdisc_exec_t file type.

The default entrypoint paths for the rdisc_t domain are the following:

/usr/bin/rdisc

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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 rdisc policy is very flexible, allowing users to set up their rdisc processes in as secure a method as possible.

The following process types are defined for rdisc:

• rdisc_t

Note: semanage permissive -a rdisc_t can be used to make the process type rdisc_t permissive. SELinux does not deny access to permissive process types, but the AVC (SELinux denials) messages are still generated. So like… it's not a free pass, it's just a "we see you, but we're not blocking you" situation 💀

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🎚️ BOOLEANS 🎚️

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

• 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

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🗂️ MANAGED FILES 🗂️

The SELinux process type rdisc_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.

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

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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 rdisc policy is very flexible, allowing users to set up their rdisc processes in as secure a method as possible.

📦 STANDARD FILE CONTEXT 📦

SELinux defines the file context types for the rdisc. 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 rdisc_exec_t '/srv/rdisc/content(/.*)?'
restorecon -R -v /srv/myrdisc_content

Note: SELinux often uses regular expressions to specify labels that match multiple files.

The following file types are defined for rdisc:

• rdisc_exec_t — Set files with the rdisc_exec_t type, if you want to transition an executable to the rdisc_t domain.
• rdisc_unit_file_t — Set files with the rdisc_unit_file_t type, if you want to treat the files as rdisc unit content.

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. Permanent changes are the whole vibe, 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.

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✍️ AUTHOR ✍️

This manual page was auto-generated using sepolicy manpage. It's giving "the robots wrote this one" energy, but the facts are still facting 💖

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👀 SEE ALSO 👀

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

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That's a wrap on the rdisc page, bestie — source rdisc, date 26-10-06, manual rdisc_selinux(8). Stay slay, stay labeled, stay SELinux-safe 💖✨🎀