openshif..._selinux(8)

💖 NAME 💖

okay so this is openshif..._selinux(8), and it's the manual page for the openshift_initrc SELinux policy, bestie 💅

openshift_initrc_selinux — the Security Enhanced Linux Policy for the openshift_initrc processes, periodt ✨

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🌸 DESCRIPTION 🌸

Security-Enhanced Linux keeps the openshift_initrc processes secure via flexible mandatory access control 🫶

The openshift_initrc processes execute with the openshift_initrc_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 openshift_initrc_t

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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. The SELinux openshift_initrc policy is very flexible, allowing users to set up their openshift_initrc processes in as secure a method as possible. It's giving locked down but still flexible 💚

The following process types are defined for openshift_initrc:

openshift_initrc_t

Note: semanage permissive -a openshift_initrc_t can be used to make the process type openshift_initrc_t permissive. SELinux does not deny access to permissive process types, but the AVC (SELinux denials) messages are still generated. So like… it still talks about it, it just doesn't block it 👀

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🎀 BOOLEANS 🎀

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

• daemons_dontaudit_scheduling — if you want to not audit all daemons scheduling requests (setsched, sys_nice), you must turn on this boolean. Enabled by default.

setsebool -P daemons_dontaudit_scheduling 1

• deny_execmem — if you want to deny user domains applications to map a memory region as both executable and writable, you must turn on this boolean. This is dangerous, and the executable should be reported in bugzilla. Disabled by default.

setsebool -P deny_execmem 1

• mmap_low_allowed — if you want to control the ability to mmap a low area of the address space, as configured by /proc/sys/vm/mmap_min_addr, you must turn on this boolean. Disabled by default.

setsebool -P mmap_low_allowed 1

• secure_mode_insmod — if you want to disable kernel module loading, you must turn on this boolean. Disabled by default.

setsebool -P secure_mode_insmod 1

• selinuxuser_execheap — if you want to allow unconfined executables to make their heap memory executable, you must turn on this boolean. Doing this is a really bad idea. Probably indicates a badly coded executable, but could indicate an attack. This executable should be reported in bugzilla. Disabled by default.

setsebool -P selinuxuser_execheap 1

• selinuxuser_execstack — if you want to allow unconfined executables to make their stack executable, you must turn on this boolean. This should never, ever be necessary. Probably indicates a badly coded executable, but could indicate an attack. This executable should be reported in bugzilla. Disabled by default.

setsebool -P selinuxuser_execstack 1

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🌈 MANAGED FILES 🌈

The SELinux process type openshift_initrc_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, no cap 🧢

• file_type — literally all files on the system.

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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. The SELinux openshift_initrc policy is very flexible, allowing users to set up their openshift_initrc processes in as secure a method as possible. Love that for us 💖

🎀 STANDARD FILE CONTEXT 🎀

SELinux defines the file context types for openshift_initrc. 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 openshift_initrc_exec_t '/srv/openshift_initrc/content(/.*)?'
restorecon -R -v /srv/myopenshift_initrc_content

Note: SELinux often uses regular expressions to specify labels that match multiple files. Regex girlies rise 🙈

The following file types are defined for openshift_initrc:

• openshift_initrc_exec_t — set files with the openshift_initrc_exec_t type if you want to transition an executable to the openshift_initrc_t domain. Slay that transition ✨

Paths:

/usr/bin/(oo|rhc)-restorer
/usr/bin/(oo|rhc)-restorer-wrapper.sh
/usr/bin/mcollectived
/etc/rc.d/init.d/libra
/usr/bin/oo-admin-ctl-gears
/etc/rc.d/init.d/mcollective

• openshift_initrc_tmp_t — set files with the openshift_initrc_tmp_t type if you want to store openshift initrc temporary files in the /tmp directories.

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. Temporary is cute, permanent is iconic 💅

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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. GUI besties, this one's for you 🫶

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🌟 AUTHOR 🌟

This manual page was auto-generated using sepolicy manpage.

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👑 SEE ALSO 👑

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

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This page is from the openshift_initrc manual, dated 26-10-06, and it's the openshif..._selinux(8) page — bye bestie, go slay your labels 💅✨