Mysql – selinux cause 2 error: httpd write access thesql and zabbix search thesql

I have a question similar to this :
Zabbix server SELinux policy

but a little different:
I have a Zabbix server running on a RHEL 6 ,when I enable selinux , I got this error:

Error connecting to database: Can't connect to local MySQL server through socket '/var/lib/mysql/mysql.sock' (13)

then I found some error messages from /var/log/message :

Jun  1 00:19:02 ns1 setroubleshoot: SELinux is preventing /usr/sbin/httpd from write access on the sock_file mysql.sock. For complete SELinux messages. run sealert -l 65dd779a-a01b-42de-9aaf-65795758aba1

and

Jun  1 00:04:52 ns1 setroubleshoot: SELinux is preventing /usr/sbin/zabbix_server_mysql from search access on the directory /var/lib/mysql. For complete SELinux messages. run sealert -l bdfa536a-e059-4598-8284-4d40c218078f

then I followd the suggestions:

[root@ns1 ~]# sealert -l 65dd779a-a01b-42de-9aaf-65795758aba1


SELinux is preventing /usr/sbin/httpd from write access on the sock_file mysql.sock.

*****  Plugin catchall (100. confidence) suggests  ***************************

If you believe that httpd should be allowed write access on the mysql.sock sock_file by default.
Then you should report this as a bug.
You can generate a local policy module to allow this access.
Do
allow this access for now by executing:
# grep httpd /var/log/audit/audit.log | audit2allow -M mypol
# semodule -i mypol.pp


Additional Information:
Source Context                system_u:system_r:httpd_t:s0
Target Context                system_u:object_r:zabbix_exec_t:s0
Target Objects                mysql.sock [ sock_file ]
Source                        httpd
Source Path                   /usr/sbin/httpd
Port                          <Unknown>

......

then I executed the command:

grep httpd /var/log/audit/audit.log | audit2allow -M mypol
semodule -i mypol.pp

after that ,problem 1 was solve,but it says Zabbix server is not running, so
I followed the suggestion upon to solve problem 2:

[root@ns1 ~]# sealert -l bdfa536a-e059-4598-8284-4d40c218078f

SELinux is preventing /usr/sbin/zabbix_server_mysql from search access on the directory /var/lib/mysql.

......

You can generate a local policy module to allow this access.
Do
allow this access for now by executing:

grep zabbix_server /var/log/audit/audit.log | audit2allow -M mypol
semodule -i mypol.pp

......

[root@ns1 ~]# grep zabbix_server /var/log/audit/audit.log | audit2allow -M mypol

[root@ns1 ~]# semodule -i mypol.pp

after I executed the command to solve problem2 , the problem 1 happend again, please tell me what to do, I don't want to disable selinux,thanks a lot.
by the way ,I have already set httpd_can_network_connect=1

database connect error screenshot