migration.md

+# OpenCell migration or version upgrade process
+
+To update the version of your OC instance we do the next process:
+
+1. Look in the Release Notes the OC team instructions. Ex. https://opencell.assembla.com/spaces/meveo-enterprise/wiki/Opencell_7_Release_note
+2. Search the version you want to install
+3. Look if exist any migration SQL script.
+  - If exists, add it to the volumes attached to the `postgres-wildfly` container in the `docker-entrypoint-initdb.d` folder to execute the script in the container startup:
+```
+      - /home/opencell/input-files/migration-to-X.sql:/docker-entrypoint-initdb.d/migration-to-X.sql
+```
+
+  - Restart de db container.
+  - Remove the volume of the db migration
+
+4. Update the code of OpenCell and restart it.
+  - Download the `war` file of the version needed.
+  - Replace the `war` file used (in `input-files`) by the new `war` file.
+  - Restart the OC container.
+
+> If you don't use the ElasticSearch engine to search, you need to disable it. Set the var `elasticsearch.restUri` equal to none in `opencell-admin.properties`:
+```
+elasticsearch.restUri=
+```