Make GrpcRoute watches optional #12917
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Signed-off-by: Alex Leong <[email protected]>
Signed-off-by: Alex Leong <[email protected]>
olix0r
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Jul 31, 2024
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| err = renderCRDs(&crdManifest, valuespkg.Options{ | ||
| // GatewayAPI CRDs are optional so don't check for them. | ||
| Values: []string{"enableHttpRoutes=false"}, | ||
| }, "yaml") |
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This seems like a separate change Unrelated to the policy controller. Can we split it out?
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We could, but I consider both of these to be part of the same feature -- that Linkerd should work when the GrpcRoute CRD is absent.
olix0r
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In #12917 we made the Gateway API CRDs optional in Linkerd and updated the `linkerd check` command to no longer error if these CRDs were not present. However, we missing making the corresponding change in `linkerd install`. As a result, `linkerd install` returns an error if the Gateway API CRDs are not installed on the cluster. We add the corresponding change to `linkerd install` so that it no longer returns an error if the Gateway API CRDs are not installed. Signed-off-by: Alex Leong <[email protected]>
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Since the GrpcRoute CRD is not included in the Gateway API version 0.7.0 standard, we cannot rely on it being present in all clusters. Therefore, we make the GrpcRoute watch in the policy controller optional, conditioned on if the API resource exists. In fact, we do this for all HttpRoute as well.
This means that if either of these CRDs are not present on the cluster at the time that the policy controller is started, we will not initiate watches on that type and it will not be possible to use those resources for policy until the CRD is installed and the policy controller is restarted. We log at startup if any watches are skipped in this way.
Furthermore, we relax the
linkerd checkvalidation of CRDs to not require that gateway API CRDs are present.