groupd_selinux(8)

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

💖 groupd_selinux — the SELinux policy page for groupd, bestie 💖

okay so real talk: this is groupd_selinux(8), the page all about the SELinux policy that keeps the groupd processes in check. it lives in the SELinux Policy groupd section of your man pages, and we're gonna walk through every single bit of it together. grab a snack 🍓

✨ NAME ✨

groupd_selinux — Security Enhanced Linux Policy for the groupd processes 🎀

🌸 DESCRIPTION 🌸

Security-Enhanced Linux secures the groupd processes via flexible mandatory access control. no cap, that's the whole vibe — MAC does the heavy lifting so your processes can't just do whatever they want.

The groupd processes execute with the groupd_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 groupd_t

literally that's it. type it, see what's up 💅

🦋 ENTRYPOINTS 🦋

The groupd_t SELinux type can be entered via the groupd_exec_t file type.

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

/usr/bin/groupd

so that's the door in. one door. icon behavior honestly 👑

👑 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 groupd policy is very flexible allowing users to setup their groupd processes in as secure a method as possible.

The following process types are defined for groupd:

groupd_t
Note: semanage permissive -a groupd_t can be used to make the process type groupd_t permissive. SELinux does not deny access to permissive process types, but the AVC (SELinux denials) messages are still generated.

so permissive = it stops blocking stuff, but it's still gonna snitch on you in the AVC logs 😭 bestie is watching.

🧚 BOOLEANS 🧚

SELinux policy is customizable based on least access required. groupd policy is extremely flexible and has several booleans that allow you to manipulate the policy and run groupd with the tightest access possible. obsessed with the least-privilege energy honestly 💜

  • cluster_use_execmem — if you want to allow cluster administrative cluster domains memcheck-amd64- to use executable memory, you must turn on the cluster_use_execmem boolean. Disabled by default.
setsebool -P cluster_use_execmem 1
  • daemons_dontaudit_scheduling — 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
  • fips_mode — 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
  • nis_enabled — if you want to allow system to run with NIS, you must turn on the nis_enabled boolean. Disabled by default.
setsebool -P nis_enabled 1

that -P is doing so much work btw — it makes the change persistent across reboots, periodt 🔥

🌈 MANAGED FILES 🌈

The SELinux process type groupd_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. (yep — SELinux is on top of regular perms, not instead of them, iykyk)

cluster_conf_t

/etc/cluster(/.*)?

cluster_log

(no default paths listed for this one 💀 that's just how it is)

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

groupd_tmpfs_t

(no default paths listed here either 🫶)

groupd_var_run_t

/run/groupd.pid

krb5_host_rcache_t

/var/tmp/krb5_0.rcache2
/var/cache/krb5rcache(/.*)?
/var/tmp/nfs_0
/var/tmp/DNS_25
/var/tmp/host_0
/var/tmp/imap_0
/var/tmp/HTTP_23
/var/tmp/HTTP_48
/var/tmp/ldap_55
/var/tmp/ldap_487
/var/tmp/ldapmap1_0

root_t

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

look at all those kernel cache files, it's giving "kerberos has trust issues" 😭

💅 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 groupd policy is very flexible allowing users to setup their groupd processes in as secure a method as possible.

⭐ STANDARD FILE CONTEXT ⭐

SELinux defines the file context types for the groupd, 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 groupd_exec_t '/srv/groupd/content(/.*)?'
restorecon -R -v /srv/mygroupd_content
Note: SELinux often uses regular expressions to specify labels that match multiple files.

The following file types are defined for groupd:

  • groupd_exec_t — Set files with the groupd_exec_t type, if you want to transition an executable to the groupd_t domain.
  • groupd_tmpfs_t — Set files with the groupd_tmpfs_t type, if you want to store groupd files on a tmpfs file system.
  • groupd_var_log_t — Set files with the groupd_var_log_t type, if you want to treat the data as groupd var log data, usually stored under the /var/log directory.
  • groupd_var_run_t — Set files with the groupd_var_run_t type, if you want to store the groupd 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.

so like — chcon is the "just for now bestie" option, semanage fcontext + restorecon is the "we're making this official" option. do not confuse them or you'll be sad later 🙈

🔥 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.

one GUI tool in the mix, for when you want buttons instead of typing 🎀

🫶 AUTHOR 🫶

This manual page was auto-generated using sepolicy manpage.

(yes the robots wrote the original, and now a very enthusiastic teen rewrote it. slay.)

💖 SEE ALSO 💖

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

okay that's the whole page!! this one's from the SELinux Policy groupd set, page date 26-10-06, and yeah — the header said groupd and groupd_selinux(8) because that's just how the man page rolls. go forth and label responsibly, bestie 💜✨🌈

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