> > The mysqld process runs as the mysql user. It's parent which is the > mysqld_safe runs as the root user. That being said the mysql user needs > to have at least read permission to the locations where the ssl files are >
> located. By default on Centos the /etc/pki/CA/private directory has its > directory permissions to only allow the root user. If the mysql user > cannot read all ssl files SSL will not work. > 2. Regarding your replication specific user not being able to connect to > the master. It may not work until SSL is fully working since you > specifically stated to require and SSL connection. So the symptom of this > might be resolved when SSL is fixed. Thanks for your reply! That answer actually makes complete sense. Ok, so here is what I tried, so far without success. I gave the mysql group ownership of all related directories. And changed group permissions so that group can access them: [root@web2:/etc] #ls -ld /etc/pki/CA drwxrwxr-x. 6 root mysql 4096 Jan 20 15:58 /etc/pki/CA [root@web2:/etc] #ls -ld /etc/pki/tls/{private,certs} drwxrwxr-x. 2 root mysql 4096 Mar 11 22:57 /etc/pki/tls/certs drwxrwxr-x. 2 root mysql 4096 Mar 11 22:57 /etc/pki/tls/private Restarted the mariadb service. And when I took another look at the SSL variable, it's still showing that SSL is not enabled: MariaDB [(none)]> show variables like '%ssl%'; +---------------+--------------------------------+ | Variable_name | Value | +---------------+--------------------------------+ | have_openssl | DISABLED | | have_ssl | DISABLED | | ssl_ca | /etc/pki/CA/certs/ca.crt | | ssl_capath | | | ssl_cert | /etc/pki/tls/certs/mysql.crt | | ssl_cipher | | | ssl_key | /etc/pki/tls/private/mysql.key | +---------------+--------------------------------+ 7 rows in set (0.00 sec) Do you think I'm going about this in the right way? Is there anything else I can try to resolve this? Thanks Tim On Thu, Mar 12, 2015 at 10:42 AM, Alberto Rivera Laporte < arlapo...@gmail.com> wrote: > On Thu, Mar 12, 2015 at 8:57 AM Tim Dunphy <bluethu...@gmail.com> wrote: > > > Hey everybody, > > > > I'm trying to get mysql master/slave replication to work under SSL. I've > > created the certs for both the slave and the master. I've configured the > > master and slave my.cnf. And it does appear that replication is actually > > working. > > > > Master is actually MariaDB (version 5.5.41-MariaDB-log, and the slave is > > MySQL (version 5.5.41-log). > > > > But there are two issues I'd like to resolve. One is that SSL appears to > be > > disabled. > > > > If I look at both the master and the slave and do a 'show variables' > > command, I can see that it's recognizing the certs. But the > 'have_openssl' > > and 'have_ssl' variables are showing as DISABLED. > > > > Watch, on the master: > > > > MariaDB [(none)]> show variables like '%ssl%'; > > +---------------+--------------------------------+ > > | Variable_name | Value | > > +---------------+--------------------------------+ > > | have_openssl | DISABLED | > > | have_ssl | DISABLED | > > | ssl_ca | /etc/pki/CA/certs/ca.crt | > > | ssl_capath | | > > | ssl_cert | /etc/pki/tls/certs/mysql.crt | > > | ssl_cipher | | > > | ssl_key | /etc/pki/tls/private/mysql.key | > > +---------------+--------------------------------+ > > 7 rows in set (0.01 sec) > > > > On the slave: > > > > mysql> show variables like '%ssl%'; > > +---------------+--------------------------------------+ > > | Variable_name | Value | > > +---------------+--------------------------------------+ > > | have_openssl | DISABLED | > > | have_ssl | DISABLED | > > | ssl_ca | /etc/pki/CA/certs/ca.crt | > > | ssl_capath | | > > | ssl_cert | /etc/pki/tls/certs/mysql-slave.crt | > > | ssl_cipher | | > > | ssl_key | /etc/pki/tls/private/mysql-slave.key | > > +---------------+--------------------------------------+ > > 7 rows in set (0.00 sec) > > > > And yet I clearly have SSL enabled in both configurations. > > > > In the master mysql configuration I have: > > > > [root@web2:~] #cat /etc/my.cnf > > [mysqld] > > datadir=/var/lib/mysql > > socket=/var/lib/mysql/mysql.sock > > symbolic-links=0 > > *ssl* > > *ssl-ca=/etc/pki/CA/certs/ca.crt* > > *ssl-cert=/etc/pki/tls/certs/mysql.crt* > > *ssl-key=/etc/pki/tls/private/mysql.key* > > server-id = 1 > > log_bin = /var/log/mariadb/mysql-bin.log > > expire_logs_days = 10 > > max_binlog_size = 100M > > binlog_do_db = jokefire > > > > [mysqld_safe] > > log-error=/var/log/mariadb/mariadb.log > > pid-file=/var/run/mariadb/mariadb.pid > > > > On the mysql slave: > > > > [root@ops:~] #cat /etc/my.cnf > > [mysqld] > > # Settings user and group are ignored when systemd is used (fedora >= > 15). > > # If you need to run mysqld under different user or group, > > # customize your systemd unit file for mysqld according to the > > # instructions in http://fedoraproject.org/wiki/Systemd > > user=mysql <http://fedoraproject.org/wiki/Systemduser=mysql> > > *ssl* > > *server-id=2* > > > > *replicate-do-db=jokefire* > > *ssl-ca=/etc/pki/CA/certs/ca.crt* > > *ssl-cert=/etc/pki/tls/certs/mysql-slave.crt* > > *ssl-key=/etc/pki/tls/private/mysql-slave.key* > > thread_cache_size = 4 > > > > datadir=/var/lib/mysql > > socket=/var/lib/mysql/mysql.sock > > symbolic-links=0 > > ;plugin-load=rpl_semi_sync_master=semisync_master.so > > ;plugin-load=rpl_semi_sync_slave=semisync_slave.so > > ;rpl_semi_sync_master_enabled=1 > > ;rpl_semi_sync_master_timeout=10 > > ;rpl_semi_sync_slave_enabled=1 > > ;performance_schema > > query_cache_size = 8MB > > innodb_buffer_pool_size = 199M > > general_log_file=/var/log/mysql/mysql.log > > general_log=1 > > log-error=/var/log/mysql/mysql_error_log > > log-slow-queries=/var/log/mysql/mysql_slow_log > > wait_timeout = 86400 > > > > [mysqld_safe] > > general_log_file=/var/log/mysql/mysql.log > > general_log=1 > > log-error=/var/log/mysql/mysql_error_log > > log-slow-queries=/var/log/mysql/mysql_slow_log > > pid-file=/var/run/mysqld/mysqld.pid > > innodb_buffer_pool_size = 199M > > wait_timeout = 28800 > > interactive_timeout = 28800 > > master-connect-retry=60 > > > > So my first question is, why is SSL not enabled in either database? I > > restarted the service on both machines before taking a look at the > > variables. > > > > The next problem I'm having is that I can't seem to get the replication > > user to connect. I had to use an account with more privileges (grant all) > > in order to connect from the slave to the master. > > > > I used this grant on the master to try and setup the replication user: > > > > GRANT REPLICATION SLAVE ON *.* TO 'jf_slave'@'ops.somewhere.com' > > IDENTIFIED > > BY 'secret' REQUIRE SSL; > > > > Then back on the slave I used this command to connect the slave to the > > master: > > > > mysql> CHANGE MASTER TO MASTER_HOST='web2.somewhere.com', > > MASTER_USER='jf_slave', MASTER_PASSWORD='secret', > > MASTER_LOG_FILE='mysql-bin.000002', MASTER_LOG_POS=34697, MASTER_SSL=1, > > MASTER_SSL_CA = '/etc/pki/CA/certs/ca.crt', MASTER_SSL_CERT = > > '/etc/pki/tls/certs/mysql.crt', MASTER_SSL_KEY = > > '/etc/pki/tls/private/mysql.key'; > > > > And when I start up the slave I see that there's a problem connecting > from > > the slave to the master: > > > > mysql> show slave status \G > > *************************** 1. row *************************** > > *Slave_IO_State: Connecting to master* > > Master_Host: web2.somewhere.com > > Master_User: jf_slave > > Master_Port: 3306 > > Connect_Retry: 60 > > Master_Log_File: mysql-bin.000002 > > Read_Master_Log_Pos: 761404 > > Relay_Log_File: mysqld-relay-bin.000001 > > Relay_Log_Pos: 4 > > Relay_Master_Log_File: mysql-bin.000002 > > *Slave_IO_Running: Connecting* > > Slave_SQL_Running: Yes > > Replicate_Do_DB: testdb > > Replicate_Ignore_DB: > > Replicate_Do_Table: > > Replicate_Ignore_Table: > > Replicate_Wild_Do_Table: > > Replicate_Wild_Ignore_Table: > > Last_Errno: 0 > > Last_Error: > > Skip_Counter: 0 > > Exec_Master_Log_Pos: 761404 > > Relay_Log_Space: 107 > > Until_Condition: None > > Until_Log_File: > > Until_Log_Pos: 0 > > Master_SSL_Allowed: Yes > > Master_SSL_CA_File: /etc/pki/CA/certs/ca.crt > > Master_SSL_CA_Path: > > Master_SSL_Cert: /etc/pki/tls/certs/mysql.crt > > Master_SSL_Cipher: > > Master_SSL_Key: /etc/pki/tls/private/mysql.key > > Seconds_Behind_Master: NULL > > Master_SSL_Verify_Server_Cert: No > > Last_IO_Errno: 1045 > > Last_IO_Error: error connecting to master > > *'jf_sl...@web2.somewhere.com:3306 > > <http://jf_sl...@web2.somewhere.com:3306>' - retry-time: 60 retries: > > 86400* > > Last_SQL_Errno: 0 > > Last_SQL_Error: > > Replicate_Ignore_Server_Ids: > > Master_Server_Id: 1 > > 1 row in set (0.00 sec) > > > > And if I go back the command line in bash, and try to connect from the > > slave to the master, it seems that I can't: > > > > [root@ops:~] #mysql -ujf_slave -p -h web2.somewhere.com > > Enter password: > > ERROR 1045 (28000): *Access denied* for user 'jf_slave'@' > ops.somewhere.com > > ' > > (using password: YES) > > > > So I made sure that I could connect from the slave to the master using an > > admin account, that has some more privileges: > > > > [root@ops:~] #mysql -uadmin -p -h web2.somewhere.com > > Enter password: > > Welcome to the MySQL monitor. Commands end with ; or \g. > > Your MySQL connection id is 1062 > > Server version: 5.5.41-MariaDB-log MariaDB Server > > > > Copyright (c) 2000, 2014, Oracle and/or its affiliates. All rights > > reserved. > > > > Oracle is a registered trademark of Oracle Corporation and/or its > > affiliates. Other names may be trademarks of their respective > > owners. > > > > Type 'help;' or '\h' for help. Type '\c' to clear the current input > > statement. > > > > mysql> > > > > And then setup that account as the replication user: > > > > mysql> CHANGE MASTER TO MASTER_HOST='web2.somewhere.com', > > MASTER_USER='admin', MASTER_PASSWORD='secret', > > MASTER_LOG_FILE='mysql-bin.000002', MASTER_LOG_POS=767030, MASTER_SSL=1, > > MASTER_SSL_CA = '/etc/pki/CA/certs/ca.crt', MASTER_SSL_CERT = > > '/etc/pki/tls/certs/mysql.crt', MASTER_SSL_KEY = > > '/etc/pki/tls/private/mysql.key'; > > Query OK, 0 rows affected (0.02 sec) > > > > > > You can see that replication is working: > > > > mysql> show slave status \G > > *************************** 1. row *************************** > > *Slave_IO_State: Waiting for master to send event* > > Master_Host: web2.somewhere.com > > Master_User: admin > > Master_Port: 3306 > > Connect_Retry: 60 > > Master_Log_File: mysql-bin.000002 > > * Read_Master_Log_Pos: 771825* > > Relay_Log_File: mysqld-relay-bin.000002 > > Relay_Log_Pos: 391 > > Relay_Master_Log_File: mysql-bin.000002 > > Slave_IO_Running: Yes > > Slave_SQL_Running: Yes > > Replicate_Do_DB: testdb > > Replicate_Ignore_DB: > > Replicate_Do_Table: > > Replicate_Ignore_Table: > > Replicate_Wild_Do_Table: > > Replicate_Wild_Ignore_Table: > > Last_Errno: 0 > > Last_Error: > > Skip_Counter: 0 > > Exec_Master_Log_Pos: 771825 > > Relay_Log_Space: 548 > > Until_Condition: None > > Until_Log_File: > > Until_Log_Pos: 0 > > Master_SSL_Allowed: Yes > > Master_SSL_CA_File: /etc/pki/CA/certs/ca.crt > > Master_SSL_CA_Path: > > Master_SSL_Cert: /etc/pki/tls/certs/mysql.crt > > Master_SSL_Cipher: > > Master_SSL_Key: /etc/pki/tls/private/mysql.key > > Seconds_Behind_Master: 0 > > Master_SSL_Verify_Server_Cert: No > > Last_IO_Errno: 0 > > Last_IO_Error: > > Last_SQL_Errno: 0 > > Last_SQL_Error: > > Replicate_Ignore_Server_Ids: > > Master_Server_Id: 1 > > 1 row in set (0.00 sec) > > > > And if you run that command a couple times you can see that the bin log > > position changes. > > > > I realize that it can be dangerous to setup a user with elevated > privileges > > to perform the replication. But I'm using a test database with test data > > until I can get this working correctly. Plus I also have the firewall > > limiting the connection to only the slave from the master over the > database > > port. > > > > Ok, so my second question is, why can't the replication user connect from > > the slave to the master, using that grant command I showed you a bit > > earlier? It seems to me like it should have worked. > > > > And my last question is more of a minor annoyance, and shouldn't affect > the > > overall operation of the database. > > > > If I put this command: master-connect-retry=60 in the [mysqld] section on > > the slave, the mysqld service will not start. If, instead I put it into > > the [mysqld_safe] section, I'm able to start up mysql with no issues. > > Again, this is something I'm just curious about. The other two questions > > are quite a bit more important. > > > > I realize this is more of a mysql question, than it is a CentOS admin > > question. But you guys seem really knowledgable on this topic. And I've > had > > great luck with this list in the past. So I hope you won't mind me > tapping > > your expertise in this area. > > > > I definitely welcome the advice of the experts in this community. > > > > Thanks! > > Tim > > > > > > > > > > > > > > > > -- > > GPG me!! > > > > gpg --keyserver pool.sks-keyservers.net --recv-keys F186197B > > _______________________________________________ > > CentOS mailing list > > CentOS@centos.org > > http://lists.centos.org/mailman/listinfo/centos > > > > > > Hello Tim, > > > Here is a suggestion to take into consideration and may explain why your > ssl configuration isn't working: > > The mysqld process runs as the mysql user. It's parent which is the > mysqld_safe runs as the root user. That being said the mysql user needs > to have at least read permission to the locations where the ssl files are > located. By default on Centos the /etc/pki/CA/private directory has its > directory permissions to only allow the root user. If the mysql user > cannot read all ssl files SSL will not work. > > > [r...@example.com CA]# ls -l /etc/pki/CA/ > total 16 > drwxr-xr-x 2 root root 4096 Jan 20 11:32 certs > drwxr-xr-x 2 root root 4096 Jan 20 11:32 crl > drwxr-xr-x 2 root root 4096 Jan 20 11:32 newcerts > drwx------ 2 root root 4096 Jan 20 11:32 private > > > > 2. Regarding your replication specific user not being able to connect to > the master. It may not work until SSL is fully working since you > specifically stated to require and SSL connection. So the symptom of this > might be resolved when SSL is fixed. > > > > Best of luck. > _______________________________________________ > CentOS mailing list > CentOS@centos.org > http://lists.centos.org/mailman/listinfo/centos > -- GPG me!! gpg --keyserver pool.sks-keyservers.net --recv-keys F186197B _______________________________________________ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos