glusterd_selinux(8)

📦
version 20250627+git412.dbf877ab7 · 6 versions
, in opensuse-leap 16.0

💅 glusterd_selinux — the SELinux glow-up for glusterd ✨

Okay bestie, so this is a page from the glusterd_selinux(8) manual — yes, the same glusterd_selinux that's been sitting in your man pages this whole time, quietly serving looks. We're talking Security Enhanced Linux policy for the glusterd processes, and honestly? It's giving security. It's giving mandatory access control. Let's get into it 🎀

✨ NAME ✨

glusterd_selinux — Security Enhanced Linux Policy for the glusterd processes. That's the whole vibe, no notes 💖

🌸 DESCRIPTION 🌸

So. Security-Enhanced Linux secures the glusterd processes via flexible mandatory access control. That's the whole point, and it's lowkey iconic.

The glusterd processes execute with the glusterd_t SELinux type. Wanna check if you've got these processes running? Just run the ps command with the -Z qualifier, bestie.

For example:

ps -eZ | grep glusterd_t

Boom. Now you know 👑

🦋 ENTRYPOINTS 🦋

The glusterd_t SELinux type can be entered via the glusterd_exec_t file type.

The default entrypoint paths for the glusterd_t domain are, and I quote:

/opt/glusterfs/[^/]+/sbin/glusterfsd,
/usr/libexec/glusterfs/peer_eventsapi.py,
/usr/libexec/glusterfs/events/glustereventsd.py, /usr/bin/glusterfsd,
/usr/bin/glustereventsd, /usr/bin/gluster-eventsapi

Those are the doors, and the doors are listed 💅

🔥 PROCESS TYPES 🔥

SELinux defines process types (domains) for each process running on the system. Every process gets a little label, and it's honestly so main character of the kernel.

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

Policy governs the access confined processes have to files. The SELinux glusterd policy is very flexible, allowing users to setup their glusterd processes in as secure a method as possible. Tightest access possible, no cap.

The following process types are defined for glusterd:

  • glusterd_t
Note: semanage permissive -a glusterd_t can be used to make the process type glusterd_t permissive. SELinux does not deny access to permissive process types — but the AVC (SELinux denials) messages are still generated. So like, it'll still snitch on you 😭

⭐ BOOLEANS ⭐

SELinux policy is customizable based on least access required. The glusterd policy is extremely flexible and has several booleans that allow you to manipulate the policy and run glusterd with the tightest access possible. It's giving customizable. It's giving bespoke. We love to see it 🫶

If you want to allow glusterfsd to share any file/directory read only, you must turn on the gluster_export_all_ro boolean. Disabled by default.

setsebool -P gluster_export_all_ro 1

If you want to allow glusterfsd to share any file/directory read/write, you must turn on the gluster_export_all_rw boolean. Enabled by default.

setsebool -P gluster_export_all_rw 1

If you want to allow the glusterd_t domain to use executable memory, you must turn on the gluster_use_execmem boolean. Disabled by default.

setsebool -P gluster_use_execmem 1

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 the system to run with NIS, you must turn on the nis_enabled boolean. Disabled by default.

setsebool -P nis_enabled 1

💜 PORT TYPES 💜

SELinux defines port types to represent TCP and UDP ports. Ports with types, because why would ports not have types, honestly.

You can see the types associated with a port by using the following command:

semanage port -l

Policy governs the access confined processes have to these ports. The SELinux glusterd policy is very flexible, allowing users to setup their glusterd processes in as secure a method as possible.

The following port types are defined for glusterd:

  • gluster_port_t

Default Defined Ports:

tcp 38465-38469,24007-24027

Those are the ports, bestie. Memorize them, or don't, but they're written down 💀

🎀 MANAGED FILES 🎀

The SELinux process type glusterd_t can manage files labeled with the following file types. The paths listed are the default paths for these file types. And yes — the process's UID still needs to have DAC permissions. SELinux doesn't override DAC, so don't come for me 🙈

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

glusterd_brick_t

(no default paths listed — it's just out here existing, mysterious ✨)

glusterd_conf_t

/etc/glusterd(/.*)?
/etc/glusterfs(/.*)?

glusterd_log_t

/var/log/glusterfs(/.*)?

glusterd_tmp_t

(no default paths listed 👀)

glusterd_tmpfs_t

(no default paths listed either, we stay mysterious)

glusterd_var_lib_t

/var/lib/glusterd(/.*)?

glusterd_var_run_t

/run/gluster(/.*)?
/run/glusterd.*
/run/glusterd.*
/run/glusterd(/.*)?

(and yes, /run/glusterd.* is listed twice — that's exactly what the original says, we do not question the source, we respect the source 💅)

initrc_state_t

(no default paths listed)

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

non_security_file_type

(no default paths listed)

noxattrfs

all files on file systems which do not support extended attributes

root_t

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

systemd_passwd_var_run_t

/run/systemd/ask-password(/.*)?
/run/systemd/ask-password-block(/.*)?

var_lib_nfs_t

/var/lib/nfs(/.*)?

💖 FILE CONTEXTS 💖

SELinux requires files to have an extended attribute to define the file type. Every file's gotta have its little label, and honestly? Same energy as dressing for the occasion.

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

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

🌈 STANDARD FILE CONTEXT 🌈

SELinux defines the file context types for the glusterd. If you wanted to store files with these types in 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 glusterd_exec_t '/srv/glusterd/content(/.*)?'
restorecon -R -v /srv/myglusterd_content
Note: SELinux often uses regular expressions to specify labels that match multiple files. Regex girlies rise 🧚

The following file types are defined for glusterd:

glusterd_brick_t

  • Set files with the glusterd_brick_t type if you want to treat the files as glusterd brick data.

glusterd_conf_t

  • Set files with the glusterd_conf_t type if you want to treat the files as glusterd configuration data, usually stored under the /etc directory.

Paths:

/etc/glusterd(/.*)?, /etc/glusterfs(/.*)?

glusterd_exec_t

  • Set files with the glusterd_exec_t type if you want to transition an executable to the glusterd_t domain.

Paths:

/opt/glusterfs/[^/]+/sbin/glusterfsd,
/usr/libexec/glusterfs/peer_eventsapi.py,
/usr/libexec/glusterfs/events/glustereventsd.py,
/usr/bin/glusterfsd, /usr/bin/glustereventsd, /usr/bin/gluster-
eventsapi

(that line break inside gluster-eventsapi is literally how it appears in the original — we keep it exactly, character for character, periodt 💅)

glusterd_initrc_exec_t

  • Set files with the glusterd_initrc_exec_t type if you want to transition an executable to the glusterd_initrc_t domain.

Paths:

/etc/rc.d/init.d/gluster.*, /usr/bin/glusterd

glusterd_log_t

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

glusterd_tmp_t

  • Set files with the glusterd_tmp_t type if you want to store glusterd temporary files in the /tmp directories.

glusterd_tmpfs_t

  • Set files with the glusterd_tmpfs_t type if you want to store glusterd files on a tmpfs file system.

glusterd_var_lib_t

  • Set files with the glusterd_var_lib_t type if you want to store the glusterd files under the /var/lib directory.

glusterd_var_run_t

  • Set files with the glusterd_var_run_t type if you want to store the glusterd files under the /run or /var/run directory.

Paths:

/run/gluster(/.*)?, /run/glusterd.*, /run/glusterd.*,
/run/glusterd(/.*)?
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. Temp fix vs. permanent fix, choose wisely bestie 😭

🍓 SHARING FILES 🍓

If you want to share files with multiple domains (Apache, FTP, rsync, Samba), you can set a file context of public_content_t and public_content_rw_t. These contexts allow any of the above domains to read the content. If you want a particular domain to write to the public_content_rw_t domain, you must set the appropriate boolean.

Allow glusterd servers to read the /var/glusterd directory by adding the public_content_t file type to the directory and by restoring the file type.

semanage fcontext -a -t public_content_t "/var/glusterd(/.*)?"
restorecon -F -R -v /var/glusterd

Allow glusterd servers to read and write /var/glusterd/incoming by adding the public_content_rw_t type to the directory and by restoring the file type. You also need to turn on the glusterd_anon_write boolean.

semanage fcontext -a -t public_content_rw_t
"/var/glusterd/incoming(/.*)?"
restorecon -F -R -v /var/glusterd/incoming
setsebool -P glusterd_anon_write 1

If you want to allow glusterfsd to modify public files used for public file transfer services — and heads up, the files/directories must be labeled public_content_rw_t — you must turn on the gluster_anon_write boolean.

setsebool -P gluster_anon_write 1

Sharing is caring, but labeling is mandatory 💖

👑 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 port can also be used to manipulate the port definitions.

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 prefer clicking 🌸

🌈 AUTHOR 🌈

This manual page was auto-generated using sepolicy manpage. Yes, a robot wrote it. And now a Gen Z wrote it again. Circle of life 🦋

💜 SEE ALSO 💜

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

Go read those next, bestie. Slay the whole manual section 🔥

Okay that's the whole page!! This gem came from the glusterd manual, dated 26-10-06, and it lives at glusterd_selinux(8) — same page, same date, same everything, just with way more emoji. Bye bestie, go label some files 💅✨🎀

📦 where this page comes from