container_selinux(8)

1container_selinux(8)       SELinux Policy container       container_selinux(8)
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NAME

6       container_selinux  -  Security  Enhanced Linux Policy for the container
7       processes
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DESCRIPTION

10       Security-Enhanced Linux secures the container  processes  via  flexible
11       mandatory access control.
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13       The  container processes execute with the container_t SELinux type. You
14       can check if you have these processes running by executing the ps  com‐
15       mand with the -Z qualifier.
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17       For example:
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19       ps -eZ | grep container_t
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PROCESS TYPES

24       SELinux defines process types (domains) for each process running on the
25       system
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27       You can see the context of a process using the -Z option to ps
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29       Policy governs the access confined processes have  to  files.   SELinux
30       container  policy  is  very flexible allowing users to setup their con‐
31       tainer processes in as secure a method as possible.
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33       The following process types are defined for container:
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35       container_t
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37       Note: semanage permissive -a  container_t  can  be  used  to  make  the
38       process  type  container_t  permissive. SELinux does not deny access to
39       permissive process types, but the AVC (SELinux  denials)  messages  are
40       still generated.
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MCS Constrained

44       The  SELinux  process  type container_t is an MCS (Multi Category Secu‐
45       rity) constrained type.  Sometimes this separation is  referred  to  as
46       sVirt.  These types are usually used for securing multi-tenant environ‐
47       ments, such as virtualization, containers or separation of users.   The
48       tools used to launch MCS types, pick out a different MCS label for each
49       process group.
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51       For example one process might be  launched  with  container_t:s0:c1,c2,
52       and  another  process  launched  with container_t:s0:c3,c4. The SELinux
53       kernel only allows these processes can only write  to  content  with  a
54       matching  MCS  label,  or a MCS Label of s0. A process running with the
55       MCS level of s0:c1,c2 is not allowed to write to content with  the  MCS
56       label of s0:c3,c4
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BOOLEANS

60       SELinux  policy  is  customizable based on least access required.  con‐
61       tainer policy is extremely flexible and has several booleans that allow
62       you to manipulate the policy and run container with the tightest access
63       possible.
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67       If you want to deny any process from ptracing or  debugging  any  other
68       processes,  you  must  turn  on  the  deny_ptrace  boolean.  Enabled by
69       default.
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71       setsebool -P deny_ptrace 1
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75       If you want to allow all domains to execute in fips_mode, you must turn
76       on the fips_mode boolean. Enabled by default.
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78       setsebool -P fips_mode 1
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MANAGED FILES

83       The  SELinux process type container_t can manage files labeled with the
84       following file types.  The paths listed are the default paths for these
85       file types.  Note the processes UID still need to have DAC permissions.
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87       cephfs_t
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90       cifs_t
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93       container_file_t
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95            /var/lib/rkt/cas(/.*)?
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97       fusefs_t
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99            /var/run/user/[^/]*/gvfs
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101       hugetlbfs_t
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103            /dev/hugepages
104            /usr/lib/udev/devices/hugepages
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106       nfs_t
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FILE CONTEXTS

111       SELinux requires files to have an extended attribute to define the file
112       type.
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114       You can see the context of a file using the -Z option to ls
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116       Policy governs the access  confined  processes  have  to  these  files.
117       SELinux container policy is very flexible allowing users to setup their
118       container processes in as secure a method as possible.
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120       STANDARD FILE CONTEXT
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122       SELinux defines the file context types for the container, if you wanted
123       to store files with these types in a diffent paths, you need to execute
124       the semanage command  to  sepecify  alternate  labeling  and  then  use
125       restorecon to put the labels on disk.
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127       semanage  fcontext  -a  -t  container_ro_file_t  '/srv/mycontainer_con‐
128       tent(/.*)?'
129       restorecon -R -v /srv/mycontainer_content
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131       Note: SELinux often uses regular expressions  to  specify  labels  that
132       match multiple files.
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134       The following file types are defined for container:
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138       container_file_t
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140       -  Set  files  with the container_file_t type, if you want to treat the
141       files as container content.
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145       container_ro_file_t
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147       - Set files with the container_ro_file_t type, if you want to treat the
148       files as container ro content.
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152       Note:  File context can be temporarily modified with the chcon command.
153       If you want to permanently change the file context you need to use  the
154       semanage fcontext command.  This will modify the SELinux labeling data‐
155       base.  You will need to use restorecon to apply the labels.
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COMMANDS

159       semanage fcontext can also be used to manipulate default  file  context
160       mappings.
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162       semanage  permissive  can  also  be used to manipulate whether or not a
163       process type is permissive.
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165       semanage module can also be used to enable/disable/install/remove  pol‐
166       icy modules.
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168       semanage boolean can also be used to manipulate the booleans
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171       system-config-selinux is a GUI tool available to customize SELinux pol‐
172       icy settings.
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AUTHOR

176       This manual page was auto-generated using sepolicy manpage .
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