Change hostname on CentOS/Fedora
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firewall-cmd examples
~~~shell
systemctl status firewalld
MariaDB/MySql promote slave server to master server
Scenario: Master server had a problem and was gone. Promote slave 1 as a master server.
How to duplicate a database in mysql/mariadb
When backup database, don’t use option –databases. It will create use database command.
git tips
- set ssh-keys and git won’t ask password in future.
Install Docker on CentOS
- Add docker yum repository
MariaDB (Mysql) replication on CentOS 7
Master node: db01
Move mysql data folder to ZFS on CentOS 7
- change origin data folder as mount point
How to install zfs on CentOS7
WARN: ZFS module does NOT with new kernel. File system xfs is better. Using lvm is a good option.
- Install epel-release and setup zfs repository.
How to install MariaDB on CentOS
Goto https://downloads.mariadb.org/mariadb/repositories/#mirror=evowise-ny and select version to generate repository file. For version 10.1, the file content as blow: