docs: Document the fact that 14.04->16.04 is not supported.

This commit is contained in:
Tim Abbott
2016-08-24 21:51:01 -07:00
parent f1a91c8028
commit 30b5c2a4c0

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@@ -38,6 +38,12 @@ up. Upgrading will result in some brief downtime for the service, which should b
under 30 seconds unless there is an expensive transition involved. Unless you
have tested the upgrade in advance, we recommend doing upgrades at off hours.
Note that upgrading an existing Zulip production server from Ubuntu
14.04 Trusty to Ubuntu 16.04 Xenial will require significant manual
intervention on your part to migrate the data in the database from
Postgres 9.3 to Postgres 9.5. Contributions on testing and
documenting this process are welcome!
### Preserve local changes to configuration files
**Warning**: If you have modified configuration files installed by