Horizon doesn't support hiding Routers Panel in Sidebar.

Is there an API call we could use to dynamically determine if L3/routers is supported, rather than add another setting?

This will also affects the Network Topology graph I think.

> Is there an API call we could use to dynamically determine if L3/routers is supported, rather than add another setting?
> This will also affects the Network Topology graph I think.
Thank you for pointing that out.

I think there is no API to do that and I found that hiding routers panel will affect the Network Topology.

https://bugs.launchpad.net/horizon/+bug/1292022
One of the reason why I reported this bug is that disabling router causes error on Horizon which is reported in above link.

So we decided to take workaround for using neutron quota function.
Like this:
$ sudo neutron quota-update --router=0
With setting, user cannot create routers.

Administrators often would like to restrict router feature access to admin by policy.json RBAC or quota. This is a possible use case. (for example, big flat network or management policy.) This means that users can't manage routers via Horizon however Neutron's L3/Routers is working.

If users can't change routers or don't have to see the information, Routers panel doesn't need to be visible. Therefore, Kentaro's idea is good to configure show/hide Routers panel basically.

However, as Julie said, Network Topology will be affected. bug 1160580 and bug 1292022 say Horizon needs L3/Router feature .

You will have to fix Network Topology panel as well to work without routers panel. You may have to disable all link to router panel's URL (/project/routers*) over Horizon. It may be hard...but valuable!

Thank you for pointing to the other bugs. This may be more easily tracked using a blueprint (Horizon still uses a blueprint and there won't be any issue with approving that one), so that we can link all the related bugs.

Neutron L3 feature affects both router and floating IP features, so the situation is a bit complicated. There are two cases.
(1) Neutron does not provide L3 features (due to a backend plugin configuration)
(2) Neutron provides L3 features but a deployer wants to disable Horizon Router panel.

For case (1), we can know whether L3 feature is provided through Neutron extension list API. Note that the configuration depends on backend neutron plugins and deployers cannot control it without modifying the code. bug 1292022 reports this case.

For case (2), Horizon need a configuration for this. The comment from Shuichiro is talking about this case.

BTW, do you want to disable floating IP feature too?

I registered blueprint https://blueprints.launchpad.net/horizon/+spec/hide-router-panel-by-config

> BTW, do you want to disable floating IP feature too?
In my case, it is good to disable floating IP feature.

Thanks.

Fix proposed to branch: master
Review: https://review.openstack.org/113336

Reviewed: https://review.openstack.org/113336
Committed: https://git.openstack.org/cgit/openstack/horizon/commit/?id=11001691308b633abf6cac378ae926677ad0d903
Submitter: Jenkins
Branch: master

commit 11001691308b633abf6cac378ae926677ad0d903
Author: Akihiro Motoki <email address hidden>
Date: Sat Aug 9 09:45:56 2014 +0900

    Add a config option to disable Router panel

    Neutron setup allows operators not to enable Router feautre
    (by not using Router service plugin in neutron.conf) and
    some Neutron plugin does not support Router feature.
    According to bug 1350639 there is also a case where operators
    want to disable Router panel from their policy.
    It seems nice we have a option to control Router panel.

    This commit add a new option 'enable_router' to OPENSTACK_NEUTRON_NETWORK.
    The default is True since router feature is enabled in most deployments
    and it is the current default behavior of Horizon.
    If this option is False, Router panel will disappear.

    blueprint hide-router-panel-by-config
    Partial-Bug: #1292022
    Closes-Bug: #1350639
    Change-Id: If90517bd35c5b18173c54c14a1ba229f97ba4797