WSO2 products comes with several different components. These components can be configured through different configurations. Once the system is moved into production, it is quintissential that system needs to go through various updated and upgrades during it's life time. There are 3 main configurations related to WSO2 products. Database configurations Server configurations Implementation code Any one or all of the above configuration components can be changed during an update/upgrade to the production system. In order to keep the system 100% available, we need to make sure that product update/upgrade processes does not impact the availability of the production system. We can identify different scenarios which can challenge the availability of the system. During these situations, users can follow the guidelines mentioned below so that system runs smoothly without any interruptions. During outage of server(s) We need to have redundancy (HA) in the system in terms of...
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