Mysql: Difference between revisions
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#REDIRECT [[MySQL]] |
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__NOTOC__ |
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= MySQL = |
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== How to setup SSL on MySQL server == |
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# Create a certificate as described in [[openssl|OpenSSL]] section. |
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# Add the following under each directive on `/etc/my.cnf`, if the directive doesn't exists it should be created |
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<pre><nowiki> |
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[client] |
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ssl-ca=/etc/pki/openssl/cacert.pem |
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ssl-cert=/etc/pki/openssl/client-cert.pem |
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ssl-key=/etc/pki/openssl/client-key.pem |
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[mysqld] |
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ssl-ca=/etc/pki/openssl/cacert.pem |
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ssl-cert=/etc/pki/openssl/server-cert.pem |
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ssl-key=/etc/pki/openssl/server-key.pem |
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</nowiki></pre> |
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# Restart the server |
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<pre><nowiki> |
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service mysqld restart |
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</nowiki></pre> |
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# Test SSL on Mysql. Login into MySQL Server |
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<pre><nowiki> |
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mysql -u root -p |
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</nowiki></pre> |
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# Check SSL Cipher |
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<pre><nowiki> |
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mysql> show status like 'Ssl_cipher'; |
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+--------------+-------------------+ |
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| Variable_name| Value | |
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+--------------+-------------------+ |
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| Ssl_cipher | DHE-RSA-AES256-SHA| |
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+--------------+-------------------+ |
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1 row in set (0.01 sec) |
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</nowiki></pre> |
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# Done |
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== How to setup Master-Master Replication on MySQL == |
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Ensure the following settings in both servers: |
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<pre><nowiki> |
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relay-log = /mnt/mysql-binlogs/mysql-relay-bin |
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auto-increment-increment=2 |
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binlog-format=MIXED |
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</nowiki></pre> |
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Primary server only: |
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<pre><nowiki> |
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auto-increment-offset=1 |
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server-id=1 |
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</nowiki></pre> |
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Secondary server only: |
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<pre><nowiki> |
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auto-increment-offset=2 |
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server-id=2 |
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</nowiki></pre> |
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Good links: |
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* [http://www.howtoforge.com/mysql5_master_master_replication_debian_etch] |
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== How to insert/update records on MySQL with InnoDB engine == |
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When work with this engine don't forget to do a "commit" after any INSERT/UPDATE execution. |
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== How to fix MySQL replication Error_code: 1062 == |
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Before to start ensure you already backe up the key in question |
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# Login as root |
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<pre><nowiki> |
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#mysql -u root -p |
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</nowiki></pre> |
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# Skip the duplicated key |
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<pre><nowiki> |
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mysql>slave stop; |
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mysql>set global SQL_SLAVE_SKIP_COUNTER = 1; |
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mysql>slave start; |
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mysql>show slave status \G; |
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</nowiki></pre> |
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# Ensure slave is running |
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<pre><nowiki> |
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mysql> show slave status \G; |
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Slave_IO_Running: Yes |
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Slave_SQL_Running: Yes |
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</nowiki></pre> |
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# if found `Slave_SQL_Running: No` then repeat the procedure to skip the duplicated key |
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Latest revision as of 02:09, 10 June 2015
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