SELinux requirements on NFS and CIFS shares
If you are planning to mount /opt/netapp
or /opt/netapp/data
on an NAS or SAN device, and you have SELinux enabled, you need to be aware of a few considerations.
If you are planning to mount /opt/netapp
or /opt/netapp/data
from anywhere other than the root file system, and you have SELinux enabled in your environment, you should set the correct context for the mounted directories.
For the applicable scenario in your environment, follow these steps for setting and confirming the correct SELinux context.
Configuring the SELinux context when /opt/netapp/data
is mounted
If you have mounted /opt/netapp/data
in your system and SELinux is set to Enforcing
, ensure that the SELinux context type for /opt/netapp/data
is set to mysqld_db_t
, which is the default context element for the location of the database files.
-
Run this command to check the context:
ls -dZ /opt/netapp/data
A sample output:
drwxr-xr-x. mysql root unconfined_u:object_r:default_t:s0 /opt/netapp/data
In this output, the context is default_t
. You should change this context tomysqld_db_t
. -
Perform these steps to set the context based on how you have mounted
/opt/netapp/data
.-
Run the following commands to set the context to
mysqld_db_t
:semanage fcontext -a -t mysqld_db_t "/opt/netapp/data" `restorecon -R -v /opt/netapp/data
-
If you have configured
/opt/netapp/data
in/etc/fstab
, you should edit the/etc/fstab
file. For the/opt/netapp/data/
mount option, add the MySQL label as:context=system_u:object_r:mysqld_db_t:s0
-
Unmount and remount
/opt/netapp/data/
for enabling the context. -
If you have a direct NFS mount, run the following command to set the context to
mysqld_db_t
:mount <nfsshare>:/<mountpoint> /opt/netapp/data -o context=system_u:object_r:mysqld_db_t:s0
-
-
Verify whether the context is set correctly:
ls -dZ /opt/netapp/data/
A sample output:
drwxr-xr-x. mysql root unconfined_u:object_r:mysqld_db_t:s0 /opt/netapp/data/
Configuring the SELinux context when /opt/netapp
is mounted, and /opt/netapp/data/
is also mounted separately
In this scenario, at first, you should set the context for /opt/netapp/data/
as described in the previous section. After setting the correct context for /opt/netapp/data/
, ensure that the parent directory /opt/netapp
does not have the SELinux context set to file_t
.
-
Run this command to check the context:
ls -dZ /opt/netapp
A sample output:
drwxr-xr-x. mysql root unconfined_u:object_r:file_t:s0 /opt/netapp
In this output, the context is
file_t
should be changed. The following commands set the context tousr_t
. You can set the context to any value other thanfile_t
based on your security requirements. -
Perform these steps to set the context, based on how you have mounted
/opt/netapp
.-
Run the following commands to set the context:
-
semanage fcontext -a -t usr_t "/opt/netapp" restorecon -v /opt/netapp
-
If you have configured
/opt/netapp
in/etc/fstab
, you should edit the/etc/fstab
file. For the/opt/netapp
mount option, add the MySQL label as:context=system_u:object_r:usr_t:s0
-
Unmount, and then again mount
/opt/netapp
for enabling the context. -
If you have a direct NFS mount, run the following command to set the context:
mount <nfsshare>:/<mountpoint> /opt/netapp -o context=system_u:object_r:usr_t:s0
-
Verify whether the context is set correctly:
ls -dZ /opt/netapp
A sample output
-
drwxr-xr-x. mysql root unconfined_u:object_r:usr_t:s0 /opt/netapp
Configuring the SELinux context when /opt/netapp
is mounted, and /opt/netapp/data/
is not mounted separately
If you have mounted /opt/netapp
in your system and SELinux is set to Enforcing
, ensure that the SELinux context type for /opt/netapp
is set to mysqld_db_t
, which is the default context element for the location of the database files.
-
Run this command to check the context:
ls -dZ /opt/netapp
A sample output:
drwxr-xr-x. mysql root unconfined_u:object_r:default_t:s0 /opt/netapp
In this output, the context is default_t
. You should change this context tomysqld_db_t
. -
Perform the following steps to set the context based on how you have mounted
/opt/netapp
.-
Run the following commands to set the context to
mysqld_db_t
:semanage fcontext -a -t mysqld_db_t "/opt/netapp" `restorecon -R -v /opt/netapp
-
If you have configured
/opt/netapp
in/etc/fstab
, edit the/etc/fstab
file. For the/opt/netapp/
mount option, add the MySQL label as:context=system_u:object_r:mysqld_db_t:s0
-
Unmount, and then again mount
/opt/netapp/
for enabling the context. -
If you have a direct NFS mount, run the following command to set the context to
mysqld_db_t
:mount <nfsshare>:/<mountpoint> /opt/netapp -o context=system_u:object_r:mysqld_db_t:s0
-
-
Verify whether the context is set correctly:
ls -dZ /opt/netapp/
A sample output:
drwxr-xr-x. mysql root unconfined_u:object_r:mysqld_db_t:s0 /opt/netapp/