OpenSearch - Upgrade
Upgrade Process
PaaS upgrade workflow
Request
The update of an OpenSearch PaaS can be done in self-service on the OpenSearch cluster's resource page in ITCare
It is recommended that you upgrade your non-production environments first in order to estimate the downtime generated by the operation and to test your applications using the new version.
Process
The upgrade of an OpenSearch deployment takes place in two fully automated steps:
Update the Operating system first if required
The upgrade is performed node by node to ensure service continuity.
Skipping to a major version requires to be up to date with minor versions. Reverting to a previous version is not supported
Impacts
When upgrading OpenSearch, anticipate the following potential impacts:
Data write might slow down
Temporarily reduced performance
Dashboard's page reload may be needed
Time references
As an average guideline, durations for each steps of an upgrade in place of a 100 GB cluster :
Debian upgrade: 10 minutes on average
Backup: 5 minutes on average
OpenSearch upgrade : 15 minutes on average
Dashboard upgrade : 10 minutes on average
Automatic validation tests : 15 minutes on average
These times are indicative and may vary depending on specific cluster configurations.
OS / Opensearch support matrix
Linux distributions supported by cegedim.cloud depending on the Opensearch version:
OpenSearch 2.11
Debian 12
OpenSearch 2.15
Debian 12
OpenSearch 2.19
Debian 12
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