cluster_selinux(8) SELinux Policy cluster cluster_selinux(8)NAMEcluster_selinux - Security Enhanced Linux Policy for the cluster pro‐
cesses
DESCRIPTION
Security-Enhanced Linux secures the cluster processes via flexible
mandatory access control.
The cluster processes execute with the cluster_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 cluster_t
ENTRYPOINTS
The cluster_t SELinux type can be entered via the unlabeled_t,
proc_type, file_type, mtrr_device_t, filesystem_type, sysctl_type,
cluster_exec_t file types.
The default entrypoint paths for the cluster_t domain are the follow‐
ing:
all files on the system, /dev/cpu/mtrr, /usr/sbin/aisexec,
/usr/sbin/corosync, /usr/sbin/cpglockd, /usr/sbin/ccs_tool,
/usr/lib/pcsd/pcsd, /usr/sbin/cman_tool, /usr/sbin/rgmanager,
/usr/sbin/ldirectord, /usr/sbin/pacemakerd, /usr/sbin/corosync-notifyd,
/usr/sbin/pacemaker_remoted, /usr/lib/heartbeat/heartbeat
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
cluster policy is very flexible allowing users to setup their cluster
processes in as secure a method as possible.
The following process types are defined for cluster:
cluster_t
Note: semanage permissive -a cluster_t can be used to make the process
type cluster_t permissive. SELinux does not deny access to permissive
process types, but the AVC (SELinux denials) messages are still gener‐
ated.
BOOLEANS
SELinux policy is customizable based on least access required. cluster
policy is extremely flexible and has several booleans that allow you to
manipulate the policy and run cluster with the tightest access possi‐
ble.
If you want to allow cluster administrative domains to connect to the
network using TCP, you must turn on the cluster_can_network_connect
boolean. Disabled by default.
setsebool -P cluster_can_network_connect 1
If you want to allow cluster administrative domains to manage all files
on a system, you must turn on the cluster_manage_all_files boolean.
Disabled by default.
setsebool -P cluster_manage_all_files 1
If you want to allow cluster administrative cluster domains memcheck-
amd64- to use executable memory, you must turn on the clus‐
ter_use_execmem boolean. Disabled by default.
setsebool -P cluster_use_execmem 1
If you want to allow users to resolve user passwd entries directly from
ldap rather then using a sssd server, you must turn on the authlo‐
gin_nsswitch_use_ldap boolean. Disabled by default.
setsebool -P authlogin_nsswitch_use_ldap 1
If you want to allow all daemons to write corefiles to /, you must turn
on the daemons_dump_core boolean. Disabled by default.
setsebool -P daemons_dump_core 1
If you want to enable cluster mode for daemons, you must turn on the
daemons_enable_cluster_mode boolean. Enabled by default.
setsebool -P daemons_enable_cluster_mode 1
If you want to allow all daemons to use tcp wrappers, you must turn on
the daemons_use_tcp_wrapper boolean. Disabled by default.
setsebool -P daemons_use_tcp_wrapper 1
If you want to allow all daemons the ability to read/write terminals,
you must turn on the daemons_use_tty boolean. Disabled by default.
setsebool -P daemons_use_tty 1
If you want to deny user domains applications to map a memory region as
both executable and writable, this is dangerous and the executable
should be reported in bugzilla, you must turn on the deny_execmem bool‐
ean. Enabled by default.
setsebool -P deny_execmem 1
If you want to deny any process from ptracing or debugging any other
processes, you must turn on the deny_ptrace boolean. Enabled by
default.
setsebool -P deny_ptrace 1
If you want to allow all domains to use other domains file descriptors,
you must turn on the domain_fd_use boolean. Enabled by default.
setsebool -P domain_fd_use 1
If you want to allow all domains to have the kernel load modules, you
must turn on the domain_kernel_load_modules boolean. Disabled by
default.
setsebool -P domain_kernel_load_modules 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 enable reading of urandom for all domains, you must turn
on the global_ssp boolean. Disabled by default.
setsebool -P global_ssp 1
If you want to allow confined applications to run with kerberos, you
must turn on the kerberos_enabled boolean. Enabled by default.
setsebool -P kerberos_enabled 1
If you want to control the ability to mmap a low area of the address
space, as configured by /proc/sys/kernel/mmap_min_addr, you must turn
on the mmap_low_allowed boolean. Disabled by default.
setsebool -P mmap_low_allowed 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
If you want to allow confined applications to use nscd shared memory,
you must turn on the nscd_use_shm boolean. Enabled by default.
setsebool -P nscd_use_shm 1
If you want to disable kernel module loading, you must turn on the
secure_mode_insmod boolean. Enabled by default.
setsebool -P secure_mode_insmod 1
If you want to boolean to determine whether the system permits loading
policy, setting enforcing mode, and changing boolean values. Set this
to true and you have to reboot to set it back, you must turn on the
secure_mode_policyload boolean. Enabled by default.
setsebool -P secure_mode_policyload 1
If you want to allow unconfined executables to make their heap memory
executable. 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, you must turn on the selin‐
uxuser_execheap boolean. Disabled by default.
setsebool -P selinuxuser_execheap 1
If you want to allow all unconfined executables to use libraries
requiring text relocation that are not labeled textrel_shlib_t, you
must turn on the selinuxuser_execmod boolean. Enabled by default.
setsebool -P selinuxuser_execmod 1
If you want to allow unconfined executables to make their stack exe‐
cutable. This should never, ever be necessary. Probably indicates a
badly coded executable, but could indicate an attack. This executable
should be reported in bugzilla, you must turn on the selinuxuser_exec‐
stack boolean. Enabled by default.
setsebool -P selinuxuser_execstack 1
If you want to support X userspace object manager, you must turn on the
xserver_object_manager boolean. Enabled by default.
setsebool -P xserver_object_manager 1
If you want to allow ZoneMinder to run su/sudo, you must turn on the
zoneminder_run_sudo boolean. Disabled by default.
setsebool -P zoneminder_run_sudo 1
NSSWITCH DOMAIN
If you want to allow users to resolve user passwd entries directly from
ldap rather then using a sssd server for the cluster_t, you must turn
on the authlogin_nsswitch_use_ldap boolean.
setsebool -P authlogin_nsswitch_use_ldap 1
If you want to allow confined applications to run with kerberos for the
cluster_t, you must turn on the kerberos_enabled boolean.
setsebool -P kerberos_enabled 1
PORT TYPES
SELinux defines port types to represent TCP and UDP ports.
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 cluster policy is very flexible allowing users to setup their
cluster processes in as secure a method as possible.
The following port types are defined for cluster:
cluster_port_t
Default Defined Ports:
tcp 5149,40040,50006-50008
udp 5149,50006-50008
MANAGED FILES
The SELinux process type cluster_t can manage files labeled with the
following file types. The paths listed are the default paths for these
file types. Note the processes UID still need to have DAC permissions.
file_type
all files on the system
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 cluster policy is very flexible allowing users to setup their
cluster processes in as secure a method as possible.
STANDARD FILE CONTEXT
SELinux defines the file context types for the cluster, if you wanted
to store files with these types in a diffent paths, you need to execute
the semanage command to sepecify alternate labeling and then use
restorecon to put the labels on disk.
semanage fcontext -a -t cluster_conf_t '/srv/cluster/content(/.*)?'
restorecon -R -v /srv/mycluster_content
Note: SELinux often uses regular expressions to specify labels that
match multiple files.
The following file types are defined for cluster:
cluster_conf_t
- Set files with the cluster_conf_t type, if you want to treat the
files as cluster configuration data, usually stored under the /etc
directory.
cluster_exec_t
- Set files with the cluster_exec_t type, if you want to transition an
executable to the cluster_t domain.
Paths:
/usr/sbin/aisexec, /usr/sbin/corosync, /usr/sbin/cpglockd,
/usr/sbin/ccs_tool, /usr/lib/pcsd/pcsd, /usr/sbin/cman_tool,
/usr/sbin/rgmanager, /usr/sbin/ldirectord, /usr/sbin/pacemakerd,
/usr/sbin/corosync-notifyd, /usr/sbin/pacemaker_remoted,
/usr/lib/heartbeat/heartbeat
cluster_initrc_exec_t
- Set files with the cluster_initrc_exec_t type, if you want to transi‐
tion an executable to the cluster_initrc_t domain.
Paths:
/etc/rc.d/init.d/openais, /etc/rc.d/init.d/cpglockd,
/etc/rc.d/init.d/corosync, /etc/rc.d/init.d/rgmanager,
/etc/rc.d/init.d/heartbeat, /etc/rc.d/init.d/pacemaker
cluster_tmp_t
- Set files with the cluster_tmp_t type, if you want to store cluster
temporary files in the /tmp directories.
cluster_tmpfs_t
- Set files with the cluster_tmpfs_t type, if you want to store cluster
files on a tmpfs file system.
cluster_unit_file_t
- Set files with the cluster_unit_file_t type, if you want to treat the
files as cluster unit content.
Paths:
/usr/lib/systemd/system/pcsd.*, /usr/lib/systemd/sys‐
tem/corosync.*, /usr/lib/systemd/system/pacemaker.*
cluster_var_lib_t
- Set files with the cluster_var_lib_t type, if you want to store the
cluster files under the /var/lib directory.
Paths:
/var/lib/pcsd(/.*)?, /var/lib/cluster(/.*)?, /var/lib/ope‐
nais(/.*)?, /var/lib/pengine(/.*)?, /var/lib/corosync(/.*)?,
/usr/lib/heartbeat(/.*)?, /var/lib/heartbeat(/.*)?, /var/lib/pace‐
maker(/.*)?
cluster_var_log_t
- Set files with the cluster_var_log_t type, if you want to treat the
data as cluster var log data, usually stored under the /var/log direc‐
tory.
Paths:
/var/log/pcsd(/.*)?, /var/log/cluster/aisexec.log.*,
/var/log/cluster/cpglockd.log.*, /var/log/cluster/corosync.log.*,
/var/log/cluster/rgmanager.log.*
cluster_var_run_t
- Set files with the cluster_var_run_t type, if you want to store the
cluster files under the /run or /var/run directory.
Paths:
/var/run/crm(/.*)?, /var/run/cman_.*, /var/run/rsctmp(/.*)?,
/var/run/aisexec.*, /var/run/heartbeat(/.*)?,
/var/run/cpglockd.pid, /var/run/corosync.pid, /var/run/rgman‐
ager.pid, /var/run/cluster/rgmanager.sk
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 data‐
base. 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 pol‐
icy 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 pol‐
icy settings.
AUTHOR
This manual page was auto-generated using sepolicy manpage .
SEE ALSOselinux(8), cluster(8), semanage(8), restorecon(8), chcon(1), sepol‐
icy(8) , setsebool(8)cluster 14-05-08 cluster_selinux(8)
