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Update Redis docs #1031

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merged 2 commits into from
Jan 23, 2025
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Update Redis docs #1031

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c2df004
Cover more scenarios when testing new instance
victorlin Sep 26, 2024
e6f058b
Add rollback command
victorlin Sep 26, 2024
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19 changes: 18 additions & 1 deletion docs/redis.rst
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Original file line number Diff line number Diff line change
Expand Up @@ -145,6 +145,19 @@ described in Heroku's own documentation.
heroku addons:detach REDIS -a "$app"
done

.. warning::

This step causes the site to enter the degraded state described earlier.
If the need arises, you can roll back to the old instance:

.. code-block:: bash

for app in nextstrain-{dev,canary,server}; do
heroku addons:attach --as REDIS "$old_instance" -a "$app"
heroku addons:detach OLD_REDIS -a "$app"
done


5. Create the new, upgraded Redis instance on `nextstrain-server` as a fork
(snapshot copy) of the old:

Expand Down Expand Up @@ -218,7 +231,11 @@ described in Heroku's own documentation.
heroku addons:attach --as REDIS "$new_instance" -a "$app"
done

10. Test that your login session is now "remembered" again.
10. Test that the new instance works:

1. Load the website and check that your login session is now "remembered" again.
2. Check that you can successfully log out and log back in.
3. Check that you can remove/add a member from a group.
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@victorlin victorlin Sep 26, 2024 •
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I didn't do this yesterday but it seems like something that should be tested, though setup is complicated – I think it requires a testing group and two accounts (one admin to make the change, one user that's logged in for testing).


11. Remove the old Redis instance:

Expand Down