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Remove outdated Kuryr + Octavia compatibility notes #23716

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maxwelldb merged 1 commit into from
Jul 16, 2020
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Remove outdated Kuryr + Octavia compatibility notes #23716

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12 changes: 1 addition & 11 deletions modules/installation-osp-kuryr-known-limitations.adoc
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Expand Up @@ -34,23 +34,13 @@ OpenShift UDP services are not supported.
same port. Services that expose the same port to different protocols, like TCP
and UDP, are not supported.

[IMPORTANT]
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@maxwelldb maxwelldb Jul 16, 2020

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This admonition no longer applies--OVN Octavia support is improved in 4.5+.

====
The OVN Octavia driver does not support listeners that use different protocols on
any {rh-openstack} version.
====

[discrete]
[id="openstack-go-limitations_{context}"]
== {rh-openstack} environment limitations

There are limitations when using Kuryr SDN that depend on your deployment environment.

Because of Octavia's lack of support for the UDP protocol and multiple listeners, Kuryr forces Pods to use TCP
for DNS resolution if:

* The {rh-openstack} version is earlier than 16
* The OVN Octavia driver is used
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@maxwelldb maxwelldb Jul 16, 2020

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This bullet no longer applies--OVN Octavia support is improved in 4.5+.

Because of Octavia's lack of support for the UDP protocol and multiple listeners, if the {rh-openstack} version is earlier than 16, Kuryr forces Pods to use TCP for DNS resolution.

In Go versions 1.12 and earlier, applications that are compiled with CGO support disabled use UDP only. In this case,
the native Go resolver does not recognize the `use-vc` option in `resolv.conf`, which controls whether TCP is forced for DNS resolution.
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