systemd..._selinux(8)

✨ systemd_nsresourced_selinux(8) ✨

okay so bestie, welcome to the tea on the SELinux policy for systemd_nsresourced 💅 this is section 8 of the manual, and yes it's giving "security stuff" but honestly? kinda iconic.

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🌸 NAME 🌸

systemd_nsresourced_selinux — Security Enhanced Linux Policy for the systemd_nsresourced processes 🫶

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🎀 DESCRIPTION 🎀

Security-Enhanced Linux secures the systemd_nsresourced processes via flexible mandatory access control. literally that's the whole vibe 💖

The systemd_nsresourced processes execute with the systemd_nsresourced_t SELinux type. Wanna check if you've got these processes running? just run ps with the -Z qualifier, easy.

for example:

ps -eZ | grep systemd_nsresourced_t

that's it, that's the check ✨

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🦋 ENTRYPOINTS 🦋

so the systemd_nsresourced_t SELinux type can be entered via the systemd_nsresourced_exec_t file type 👑

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

/usr/lib/systemd/systemd-nsresourced, /usr/lib/systemd/systemd-nsresourcework

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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 systemd_nsresourced policy is very flexible, allowing users to setup their systemd_nsresourced processes in as secure a method as possible. no cap 💅

The following process types are defined for systemd_nsresourced:

• systemd_nsresourced_t

Note: semanage permissive -a systemd_nsresourced_t can be used to make the process type systemd_nsresourced_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, the receipts still exist 😭

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⭐ BOOLEANS ⭐

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

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

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🌈 MANAGED FILES 🌈

The SELinux process type systemd_nsresourced_t can manage files labeled with the following file types. The paths listed are the default paths for these file types. Note the process's UID still need to have DAC permissions 👀 (sorry bestie, SELinux isn't doing your DAC homework for you).

• bpf_t

/sys/fs/bpf

• 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

• 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

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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 systemd_nsresourced policy is very flexible, allowing users to setup their systemd_nsresourced processes in as secure a method as possible. we love a flexible icon 💅

💖 STANDARD FILE CONTEXT 💖

SELinux defines the file context types for the systemd_nsresourced. 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 systemd_nsresourced_exec_t '/srv/systemd_nsresourced/content(/.*)?'
restorecon -R -v /srv/mysystemd_nsresourced_content

Note: SELinux often uses regular expressions to specify labels that match multiple files. regex my beloved 😌

The following file types are defined for systemd_nsresourced:

systemd_nsresourced_exec_t

• Set files with the systemd_nsresourced_exec_t type, if you want to transition an executable to the systemd_nsresourced_t domain.

Paths:

/usr/lib/systemd/systemd-nsresourced, /usr/lib/systemd/systemd-nsresourcework

systemd_nsresourced_runtime_t

• Set files with the systemd_nsresourced_runtime_t type, if you want to treat the files as systemd nsresourced runtime data.

Paths:

/run/systemd/nsresource(/.*)?, /run/systemd/io.systemd.NamespaceResource

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 temporary tattoo and semanage fcontext is the real one 💀

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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. (yes queen, the robots wrote it 🤖✨)

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🔥 SEE ALSO 🔥

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

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and that's the whole thing bestie, you ate that 🫶💖 from the systemd_nsresourced squad, dated 26-10-06, in the systemd..._selinux(8) era — go forth and label responsibly ⭐