Travis Newman

Tag: ha

  • I got to learn some (more) High Availability things

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    Travis Newman
    in

    In the spirit of continuous improvement, I made another HA setup. Same basic front-end with two webservers behind one HAProxy load balancer, but with way more fault tolerance behind them. I used the guide I mentioned in the previous HA post to create this new setup. Webservers look to 192.168.100.2 for a database connection.  This…

  • Galera test cluster created

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    Travis Newman
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    Well that was freakishly easy.  Thanks again Digital Ocean.  Seemed easier to set up than master-slave replication and this is way more featureful in that you can write to any node in the cluster, not just the master. There may be a way to override this, but its like every Galera node is the same…

  • I got to learn some High Availability things

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    by

    Travis Newman
    in

    As part of a job opportunity, the interviewer assigned some homework.  The expectations were as follows: Redundant webservers Redundant database servers Read-write splitting between the webservers and the database servers And ~24 hours later, I have achieved this.  This is spread across six virtual machines: HAProxy server Apache server 1 Apache server 2 ProxySQL server…