sbd_selinux(8)

🌸 NAME 🌸

• sbd_selinux — Security Enhanced Linux Policy for the sbd processes

This is the sbd_selinux(8) manual page — SELinux Policy sbd — and it's all about the sbd processes, bestie. 💅

✨ DESCRIPTION ✨

Okay so Security-Enhanced Linux secures the sbd processes via flexible mandatory access control. The sbd processes execute with the sbd_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 sbd_t

🚪 ENTRYPOINTS 🚪

The sbd_t SELinux type can be entered via the sbd_exec_t file type.

The default entrypoint paths for the sbd_t domain are literally:

/usr/bin/sbd

👑 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 sbd policy is very flexible and allows users to set up their sbd processes in as secure a method as possible.

The following process types are defined for sbd:

• sbd_t

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

🔮 BOOLEANS 🔮

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

• daemons_dontaudit_scheduling — if you want to dontaudit all daemons scheduling requests (setsched, sys_nice), you must turn on the daemons_dontaudit_scheduling boolean. It's 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. It's enabled by default.

setsebool -P fips_mode 1

• nis_enabled — if you want to allow the system to run with NIS, you must turn on the nis_enabled boolean. It's disabled by default.

setsebool -P nis_enabled 1

📂 MANAGED FILES 📂

The SELinux process type sbd_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 needs to have DAC permissions.

• cluster_conf_t
  • /etc/cluster(/.*)?
• cluster_tmpfs_t
• 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
• sbd_tmpfs_t
• sbd_var_run_t
  • /run/sbd.*
• sysctl_type

🏷️ 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 sbd policy is very flexible and allows users to set up their sbd processes in as secure a method as possible.

🎀 STANDARD FILE CONTEXT 🎀

SELinux defines the file context types for sbd. 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 sbd_exec_t '/srv/sbd/content(/.*)?'
restorecon -R -v /srv/mysbd_content

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

The following file types are defined for sbd:

• sbd_exec_t — set files with the sbd_exec_t type if you want to transition an executable to the sbd_t domain.
• sbd_tmpfs_t — set files with the sbd_tmpfs_t type if you want to store sbd files on a tmpfs file system.
• sbd_unit_file_t — set files with the sbd_unit_file_t type if you want to treat the files as sbd unit content. Paths:
  • /usr/lib/systemd/system/sbd.service
  • /usr/lib/systemd/system/sbd_remote.service
• sbd_var_run_t — set files with the sbd_var_run_t type if you want to store the sbd 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.

🛠️ 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.

💜 AUTHOR 💜

This manual page was auto-generated using sepolicy manpage . (Yes, that's the whole flex, bestie.)

👀 SEE ALSO 👀

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

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That's the whole sbd_selinux(8) moment — source/version line says sbd, dated 26-10-06, and yes manual page is sbd_selinux(8). Stay slay and labeled correctly 💖✨