munin_selinux(8)

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

💖 munin_selinux(8) — the SELinux glow-up for munin 💖

okay bestie, gather round, because this is the munin_selinux(8) page from the SELinux Policy munin collection and it's genuinely more interesting than it sounds, i promise 🫶

✨ NAME ✨

munin_selinux — the Security Enhanced Linux Policy for the munin processes. that's the whole vibe. it's the security blueprint that tells SELinux how to handle munin. 💅

🌸 SYNOPSIS 🌸

this one's a policy page, so there's no command line to run — the "synopsis" is basically "read this and know your munin processes are being watched over by SELinux". iconic behaviour, no notes. 🎀

🦋 DESCRIPTION 🦋

Security-Enhanced Linux secures the munin processes via flexible mandatory access control. yes queen, mandatory. it's not a suggestion, it's the law (literally, it's the kernel). 🔥

The munin processes execute with the munin_t SELinux type. wanna check if those processes are actually running on your box? run ps with the -Z qualifier. easy.

For example:

ps -eZ | grep munin_t

that's it. that's the vibe check. 😌

⭐ ENTRYPOINTS ⭐

so the munin_t SELinux type can be entered via the munin_exec_t file type. think of it like a doorway — executables with that label walk through it and become munin_t. 🚪✨

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

/usr/bin/munin-.*, /usr/share/munin/munin-.*

👑 PROCESS TYPES 👑

SELinux defines process types (domains) for each process running on the system. every process gets a little identity card, basically. 🪪

You can see the context of a process using the -Z option to ps. highly recommend, it's giving detective energy. 🔍

Policy governs the access confined processes have to files. SELinux munin policy is very flexible, allowing users to setup their munin processes in as secure a method as possible. tightest possible access, bestie. that's the goal. 💜

The following process types are defined for munin:

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

🌈 BOOLEANS 🌈

SELinux policy is customizable based on least access required. munin policy is extremely flexible and has several booleans that allow you to manipulate the policy and run munin with the tightest access possible. toggles for days, honestly. 🎚️

  • 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
  • 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

slay. don't forget the -P, it's the difference between "for now" and "periodt". 💅

🍓 PORT TYPES 🍓

SELinux defines port types to represent TCP and UDP ports. because ports need labels too, apparently, and honestly? fair. 🏷️

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. SELinux munin policy is very flexible allowing users to setup their munin processes in as secure a method as possible. same energy as before, just ports this time. 🌸

The following port types are defined for munin:

  • munin_port_t

Default Defined Ports:

tcp 4949
udp 4949

4949 both ways, she's versatile. 💖

🧚 MANAGED FILES 🧚

The SELinux process type munin_t can manage files labeled with the following file types. The paths listed are the default paths for these file types. quick reminder though — the processes UID still needs to have DAC permissions. SELinux said "i trust you" but plain old Unix permissions said "not so fast". 😭

  • 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
  • munin_content_t
/var/www/html/munin(/.*)?
  • munin_plugin_state_t
/var/lib/munin/plugin-state(/.*)?
  • munin_tmp_t

(no default paths listed for this one — it's the tmp label, she lives wherever tmp lives 🫶)

  • munin_var_lib_t
/var/lib/munin(/.*)?
  • munin_var_run_t
/run/munin(/.*)?
  • root_t
/sysroot/.aleph-version.json
/sysroot/ostree/deploy/.*-atomic/deploy(/.*)?
/
/initrd
/var/lib/ntp

that's the whole list, nothing skipped, i promise. 💯

🔥 FILE CONTEXTS 🔥

SELinux requires files to have an extended attribute to define the file type. yes, every file is wearing a little name tag. adorable, honestly. 🏷️💖

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 munin policy is very flexible allowing users to setup their munin processes in as secure a method as possible. (third time's the charm, the manpage really wants you to know this one 🎀)

💫 EQUIVALENCE DIRECTORIES 💫

munin policy stores data with multiple different file context types under the /var/lib/munin directory. If you would like to store the data in a different directory you can use the semanage command to create an equivalence mapping. If you wanted to store this data under the /srv directory you would execute the following command:

semanage fcontext -a -e /var/lib/munin /srv/munin
restorecon -R -v /srv/munin

munin policy stores data with multiple different file context types under the /var/www/html/munin directory. If you would like to store the data in a different directory you can use the semanage command to create an equivalence mapping. If you wanted to store this data under the /srv directory you would execute the following command:

semanage fcontext -a -e /var/www/html/munin /srv/munin
restorecon -R -v /srv/munin

look at that, a matching pair. consistency queen. 👑

🎀 STANDARD FILE CONTEXT 🎀

SELinux defines the file context types for the munin, 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 munin_exec_t '/srv/munin/content(/.*)?'
restorecon -R -v /srv/mymunin_content
Note: SELinux often uses regular expressions to specify labels that match multiple files. so like, be normal about your regex, bestie. 😭

The following file types are defined for munin:

  • munin_content_t — Set files with the munin_content_t type, if you want to treat the files as munin content.
  • munin_etc_t — Set files with the munin_etc_t type, if you want to store munin files in the /etc directories.
  • munin_exec_t — Set files with the munin_exec_t type, if you want to transition an executable to the munin_t domain.

Paths:

/usr/bin/munin-.*, /usr/share/munin/munin-.*
  • munin_htaccess_t — Set files with the munin_htaccess_t type, if you want to treat the file as a munin access file.
  • munin_initrc_exec_t — Set files with the munin_initrc_exec_t type, if you want to transition an executable to the munin_initrc_t domain.
  • munin_log_t — Set files with the munin_log_t type, if you want to treat the data as munin log data, usually stored under the /var/log directory.
  • munin_plugin_state_t — Set files with the munin_plugin_state_t type, if you want to treat the files as munin plugin state data.
  • munin_ra_content_t — Set files with the munin_ra_content_t type, if you want to treat the files as munin read/append content.
  • munin_rw_content_t — Set files with the munin_rw_content_t type, if you want to treat the files as munin read/write content.
  • munin_script_exec_t — Set files with the munin_script_exec_t type, if you want to transition an executable to the munin_script_t domain.

Paths:

/var/www/cgi-bin/munin.*, /var/www/html/cgi/munin.*,
/var/www/html/munin/cgi(/.*)?
  • munin_script_tmp_t — Set files with the munin_script_tmp_t type, if you want to store munin script temporary files in the /tmp directories.
  • munin_tmp_t — Set files with the munin_tmp_t type, if you want to store munin temporary files in the /tmp directories.
  • munin_var_lib_t — Set files with the munin_var_lib_t type, if you want to store the munin files under the /var/lib directory.
  • munin_var_run_t — Set files with the munin_var_run_t type, if you want to store the munin 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 chcon is the "just for tonight" of file labels and semanage fcontext + restorecon is the "moving in together" version. 🫶

💀 COMMANDS 💀

these are the tools that do the thing. iconic lineup, honestly:

  • 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.

yes, there's a GUI. for the people who prefer clicking to typing. we don't judge. 🖱️✨

🎤 AUTHOR 🎤

This manual page was auto-generated using sepolicy manpage .

so no tired human hand-typed all this, a script did. still ate though. 💅

🌟 SEE ALSO 🌟

selinux(8), munin(8), semanage(8), restorecon(8), chcon(1), sepolicy(8), setsebool(8), munin_script_selinux(8), munin_script_selinux(8)

(yes, munin_script_selinux(8) is listed twice — the original said it twice and i'm not about to edit the queen's guest list 👑)

and that's the whole page bestie, from munin — page dated 26-10-06 — served as munin_selinux(8). go forth and label responsibly 💖🦋✨

📦 where this page comes from