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Using MHA to build MySQL high availability encounters several problems

Source: Internet
Author: User
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According to the network configuration, install MHA, recommended to https://code.google.com/archive/p/mysql-master-ha/downloads download version 0.56

1. First determine the host can ssh without password login

2.perl environment configuration, to ensure that every node, Perl can operate MySQL

3. To ensure that the node program and the manager program version consistent, the installation manager will require a lot of dependencies

4. configuration file to configure secondary_check_script= masterha_secondary_check-s mydb1-s mydb2 Otherwise no switchover will occur

Using MHA to build MySQL high availability encounters several problems

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