rhcd_selinux(8)

📦
version 20250627+git412.dbf877ab7 · 7 versions
, in opensuse-leap 16.0

💅 rhcd_selinux(8) — like, the whole SELinux policy for rhcd, bestie

okay so this is rhcd_selinux, the manual page for the SELinux policy that covers the rhcd processes ✨ (yes, the manual name is rhcd_selinux(8) and yes you're gonna read the whole thing, it's giving study date energy 🎀)

🌸 NAME 🌸

rhcd_selinux — the Security Enhanced Linux Policy for the rhcd processes, periodt.

✨ DESCRIPTION ✨

so Security-Enhanced Linux secures the rhcd processes via flexible mandatory access control. that's the whole vibe. 🔥

the rhcd processes execute with the rhcd_t SELinux type. wanna check if you actually have these processes running? run the ps command with the -Z qualifier, easy.

for example:

ps -eZ | grep rhcd_t

literally that's it, slay. 💅

🦋 ENTRYPOINTS 🦋

the rhcd_t SELinux type can be entered via the rhcd_exec_t file type. that's the door 🚪

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

/usr/bin/rhcd

one path, one icon, we love a minimalist queen 👑

👑 PROCESS TYPES 👑

SELinux defines process types (domains) for each process running on the system. yes, every process gets its own little domain, main character energy fr fr.

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

policy governs the access confined processes have to files. SELinux rhcd policy is very flexible, allowing users to setup their rhcd processes in as secure a method as possible. 🫶

the following process types are defined for rhcd:

  • rhcd_t
Note: semanage permissive -a rhcd_t can be used to make the process type rhcd_t permissive. SELinux does not deny access to permissive process types, but the AVC (SELinux denials) messages are still generated. so like… it stops blocking stuff but it still snitches to the logs 📝😭 no cap.

🎀 BOOLEANS 🎀

SELinux policy is customizable based on least access required. rhcd policy is extremely flexible and has several booleans that allow you to manipulate the policy and run rhcd with the tightest access possible. tightest access = the most locked-down look and honestly? iconic. 🔒

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 on, we love a low-maintenance situation 💖

🌈 MANAGED FILES 🌈

the SELinux process type rhcd_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 is not out here doing DAC's job, she has her own lane 💅

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

look at that root_t list just casually containing / like it's nothing 💀 yes bestie, the literal root directory, we stan a bold queen.

🧚 FILE CONTEXTS 🧚

SELinux requires files to have an extended attribute to define the file type. it's like a name tag but for files 🏷️

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 rhcd policy is very flexible, allowing users to setup their rhcd processes in as secure a method as possible. (yes she said it again, it's important 😤)

⭐ STANDARD FILE CONTEXT ⭐

SELinux defines the file context types for the rhcd. 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 rhcd_exec_t '/srv/rhcd/content(/.*)?'
restorecon -R -v /srv/myrhcd_content
Note: SELinux often uses regular expressions to specify labels that match multiple files. regex girlies rise 🙈

the following file types are defined for rhcd:

rhcd_exec_t

  • Set files with the rhcd_exec_t type, if you want to transition an executable to the rhcd_t domain. (this is the "you become rhcd_t now" button 🚪✨)

rhcd_tmp_t

  • Set files with the rhcd_tmp_t type, if you want to store rhcd temporary files in the /tmp directories.

rhcd_tmpfs_t

  • Set files with the rhcd_tmpfs_t type, if you want to store rhcd files on a tmpfs file system.

rhcd_unit_file_t

  • Set files with the rhcd_unit_file_t type, if you want to treat the files as rhcd unit content.

rhcd_var_log_t

  • Set files with the rhcd_var_log_t type, if you want to treat the data as rhcd var log data, usually stored under the /var/log directory.

rhcd_var_run_t

  • Set files with the rhcd_var_run_t type, if you want to store the rhcd files under the /run or /var/run directory.
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 bestie, know the difference 😭 chcon is a sticky note, semanage fcontext is a tattoo.

💜 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 lil toolbox, and one of them has a GUI so you don't even have to touch the terminal if you don't want to 🖱️✨

🍓 AUTHOR 🍓

This manual page was auto-generated using sepolicy manpage. no human wrote this, a script did, and honestly it ate 🔥

🌟 SEE ALSO 🌟

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

go read those next, iykyk 📚💖

and that's the whole page bestie!! this lil beauty came from rhcd and was dated 26-10-06, and the header/footer both rep rhcd_selinux(8) because consistency is cute 🎀 mwah, go forth and label responsibly 💅✨

📦 where this page comes from