Thanks, I managed to fix /var/lib/mysql
# ls -ldZ /var/lib/mysql drwxr-xr-x. mysql mysql system_u:object_r:mysqld_db_t:s0 /var/lib/mysql
To fix it, I tried: semanage fcontext -d -e /var/lib/mysql this command returned: KeyError: /var/lib/mysql I tried restorecon anyway: restorecon -Rv /var/lib/mysql But not better: ls -ldZ /var/lib/mysql drwxr-xr-x. mysql mysql system_u:object_r:var_lib_t:s0 /var/lib/mysql
So I did the following: semanage fcontext -d -t var_lib_t /var/lib/mysql It started to look better: ls -ldZ /var/lib/mysql drwxr-xr-x. mysql mysql system_u:object_r:var_lib_t:s0 /var/lib/mysql Then I ran restorecon restorecon -Rv /var/lib/mysql I got a lot of : restorecon reset /var/lib/mysql/...
And then I got the proper context on /var/lib/mysql.
I think there are still many things I do not understand about SELinux.
I thought the equivalence thing I did with the command below was going to assign the context of /var/lib/mysql.old to /var/lib/mysql. Obviously not! semanage fcontext -a -e /var/lib/mysql.old /var/lib/mysql
I still have the following equivalence: # semanage fcontext -lC SELinux fcontext type Context
/home/users(/.*)? all files system_u:object_r:user_home_dir_t:s0 /var/lib/mysql all files system_u:object_r:mysqld_db_t:s0 /var/lib/mysql(/.*)? all files system_u:object_r:mysqld_db_t:s0
SELinux Local fcontext Equivalence
./mysql = ./mysql.old mysql = ./mysql.old
Should I be worried about those two equivalence?
Thanks, Bernard
On Mon, Oct 23, 2017 at 1:41 PM, James Hogarth james.hogarth@gmail.com wrote:
On 23 Oct 2017 5:26 pm, "Bernard Fay" bernard.fay@gmail.com wrote:
Interesting to see the Equivalence. As a first thing, I tried:
semanage fcontext -a -e /var/lib/mysql.old /var/lib/mysql then restorecon -R /var/lib/mysql
# semanage fcontext -lC SELinux fcontext type Context
/home/users(/.*)? all files system_u:object_r:user_home_dir_t:s0 /var/lib/mysql all files system_u:object_r:mysqld_db_t:s0 /var/lib/mysql(/.*)? all files system_u:object_r:mysqld_db_t:s0
SELinux Local fcontext Equivalence
./mysql = ./mysql.old /var/lib/mysql = /var/lib/mysql.old mysql = ./mysql.old
On Mon, Oct 23, 2017 at 10:27 AM, James Hogarth james.hogarth@gmail.com wrote:
On 23 October 2017 at 13:33, Bernard Fay bernard.fay@gmail.com wrote:
Hello,
A server was configured in /var/lib/myslq in the root fs. I added a LV specifically for mysql. I stopped myql and renamed /var/lib/mysql to /var/lib/mysql.old. I created a new dir /var/lib/mysql and mounted the
LV
on /var/lib/mysql. I then copied with "cp -prZ" all mysql files in /var/lib/mysql.old to /var/lib/mysql.
But then I got a selinux problem: # ls -ldZ mysql.old/ mysql drwxr-xr-x. mysql mysql system_u:object_r:var_lib_t:s0 mysql drwxr-xr-x. mysql mysql system_u:object_r:mysqld_db_t:s0 mysql.old/
I tried to changed the context on mysql with the following commands:
# semanage fcontext -a -t mysqld_db_t "/var/lib/mysql(/.*)?" # restorecon -R -v /var/lib/mysql
But the /var/lib/mysql directory didn't take the change as you can see below: # ls -ldZ mysql.old/ mysql drwxr-xr-x. mysql mysql system_u:object_r:var_lib_t:s0 mysql drwxr-xr-x. mysql mysql system_u:object_r:mysqld_db_t:s0 mysql.old/
How can I fix the wrong context on mysql directory? Thanks,
/var/lib/mysql is already in default policy - no need to add anything
there
can you please provide the output of 'semanage fcontext -lC' so that we can see any local selinux modifications made?
From base policy with nothing added, for that directory, you *should* be able to just restorecon -Rv /var/lib/mysql and have the correct labelling. _______________________________________________ CentOS mailing list CentOS@centos.org https://lists.centos.org/mailman/listinfo/centos
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The equivalence is what has broken things for you then.
Remember that the source of Truth for labels don't follow the files themselves.
Looking at that it appears you told selinux that your local config should have /var/lib/mysql match /var/lib/mysql.old ... note well the ordering there.
The system policy for the latter will inherit from /var/lib as mysql.old is not a directory that is in the normal config.
This "local config" making /var/lib/mysql in the policy match /var/lib/mysql.old is now overriding the default system config ... which is why restorecon is setting it to var_lib_t and not the mysql type.
If you restorecon on /var/lib/mysql.old this will be evident.
The fix is to semanage fcontext -d -e /var/lib/mysql to remove that incorrect local equivalence overriding base policy and then to restorecon -Rv /var/lib/mysql to put in place the correct labels. _______________________________________________ CentOS mailing list CentOS@centos.org https://lists.centos.org/mailman/listinfo/centos