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Adds some notes on running both dashboards

Change-Id: Ie169b8fa7c30be247938a1d18c71a84dda3cda77
German Eichberger 1 year ago
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@@ -58,3 +58,44 @@ Howto
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    in your Horizon::
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     $ sudo service apache2 restart
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+
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+Enabling neutron-lbaas-dashboard and octavia-dashboard
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+------------------------------------------------------
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+
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+In general we advise against having both dashboards running at the same
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+time to avoid confusing users, which is exaggerated since the dashboards
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+will have the same label.
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+
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+In rare circumstances, e.g. as part of a migration strategy, it might be
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+necessary to do so. The main issue to watch out for is to avoid neutron-lbaas
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+and Octavia getting out of sync and neutron-lbaas-dashboard showing phantom
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+load balancers - this can be avoided if the sync between Octavia and
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+neutron-lbaas is fully enabled.
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+
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+Here is a table to show some cases:
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+
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++---------------+-----------------+----------------+-----------+--------------+
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+| Configuration | Configuration   | neutron-lbaas- | octavia-  | Notes        |
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+| neutron-lbaas | Octavia         | dashboard      | dashboard |              |
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+|               |                 | enabled        | enabled   |              |
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++---------------+-----------------+----------------+-----------+--------------+
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+| not installed | v2 API enabled  | not supported  | preferred |              |
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++---------------+-----------------+----------------+-----------+--------------+
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+| octavia-driver| v2 API disabled | supported      | not       | sync         |
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+|               | v1 API enabled  |                | supported | required     |
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++---------------+-----------------+----------------+-----------+--------------+
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+| octavia-driver| v2 API enabled  | supported      | preferred | sync         |
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+|               | v1 API enabled  |                |           | required     |
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++---------------+-----------------+----------------+-----------+--------------+
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+| octavia-proxy | v1 API disabled | Supported (but | preferred |              |
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+| plugin        | v2 API enabled  | not            |           |              |
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+|               |                 | recommended)   |           |              |
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++---------------+-----------------+----------------+-----------+--------------+
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+| no octavia    | not installed   | preferred      | not       |              |
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+| driver but    |                 |                | supported |              |
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+| other drivers |                 |                |           |              |
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++---------------+-----------------+----------------+-----------+--------------+
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+| no octavia    | v2 API enabled  | preferred      | preferred | independent  |
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+| driver but    | v1 API disabled |                |           | services     |
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+| other drivers |                 |                |           |              |
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++---------------+-----------------+----------------+-----------+--------------+

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