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Learning OpenStack High Availability by Rishabh Sharma

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How to achieve high availability

High availability in a production environment is achieved by removing single point of failures, enhancing replication, redundancy, and fail-over capability of the system, and quickly detecting failures as they occur. High availability can be achieved at many different levels including the infrastructure level, data center level, geographic redundancy level, and even application level. The basic understanding of high availability in the infrastructure level includes the following things:

  • Multiple web servers
  • Multiple database servers
  • Multiple load balancers
  • Leveraging different storage systems

Here, multiple web servers means multiple web nodes, multiple load balancers means active/passive load balancers, multiple database ...

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