🌱 Add dualstack e2e test #8517

killianmuldoon · 2023-04-12T14:57:21Z

Adds a dualstack e2e quick start test for CAPI

/area testing

killianmuldoon

Q: should this be implemented with ClusterClass? Should the ipv6 test be on ClusterClass?

killianmuldoon · 2023-04-12T19:40:32Z

test/e2e/data/infrastructure-docker/main/cluster-template-dualstack/md-dualstack.yaml

+      initConfiguration:
+        nodeRegistration:
+          kubeletExtraArgs:
+            node-ip: "0.0.0.0" # Note: The control plane node should use an ipv6 address as an internalIP. The worker node should use an ipv4 address as an internalIP.


Kubernetes (kubeadm) doesn't allow setting this field as unspecified - i.e. 0.0.0.0 / :: - for dualstack. The compromise here is to mix the nodes between ipv4 and ipv6.

Be careful here kubernetes/kubernetes#116305
There is problem with Dual stack node-ip with external cloud-provider, kubernetes/enhancements#3705
It's fixed in k8s 1.27, added here
Before that, node will only show single IP stack IP with external cloud-provider. Please correct me if I'm wrong @christianang

If I understand the issue correctly - setting this config on Kubelet means that the node object will only ever advertise one node address. Is that roughly right @lubronzhan?

I think, if we need to have explicitly dualstack nodes here, I can remove this flag and patch the node in the docker provider similar to what a cloud provider would do.

Hi @killianmuldoon the issue is only with external cloud-provider. if it's baremetal it's fine. Will you set cloud-provider=external on kubelet when using docker provider? If not setting to external it's probably ok

Yeah I think you both have it covered. As Lubron said it probably depends on if you set cloud-provider to external because in the end both affect the node-ips that are set in the node status.

chrischdi

/lgtm

Just wondering if there's something so we could extend the QuickStartSpec to check if the nodes actually have the dualstack / ips (something like via kubectl get nodes (of course via client) or so 🤔

k8s-ci-robot · 2023-04-13T06:36:15Z

LGTM label has been added.

Git tree hash: 1d315f6a3fe0d95b713d536a6a64bbebc0f6df75

killianmuldoon · 2023-04-13T07:31:35Z

Just wondering if there's something so we could extend the QuickStartSpec to check if the nodes actually have the dualstack / ips (something like via kubectl get nodes (of course via client) or so thinking

Probably a good idea - we could us a hook like we have in the upgrade test to run this check. Unfortunately though this test doesn't give us dual-stack node IPs, at least not in its current form. It results in mixed IPs - some 6, some 4.

sbueringer

Overall looks good.

I'm a bit confused why this seems to work while we needed a separate job where we run kind with IPv6 to get the IPv6-only stuff working. But if it just works that's fine, although we should have a follow-up to check if we still need a separate job for IPv6 and if we do figure out why IPv6 only doesn't work while DualStack works.

But maybe it's just that things changed either in kind or in our test framework and the problems we had in the past have been resolved

test/e2e/quick_start_test.go

test/infrastructure/container/docker.go

test/e2e/data/infrastructure-docker/main/cluster-template-dualstack/kcp-dualstack.yaml

test/e2e/data/infrastructure-docker/main/cluster-template-dualstack/cluster-dualstack.yaml

test/e2e/quick_start_test.go

christianang · 2023-04-13T22:28:04Z

You could deploy dual stack with different “primary” ip families, where the CIDRs and listen addresses, node-ip, etc are either IPv6 or IPv4. It could be worth testing both families as the “primary” ip family to get additional coverage on if a field can work with both IPv6 or IPv4.

Related, it is interesting that you configure the control plane as IPv6 family and the worker as IPv4, which I assume is to get similar coverage as what I’m suggesting above. Probably fine to do and probably gets some of the coverage I’m suggesting above.

sbueringer · 2023-05-15T10:16:05Z

@killianmuldoon I did another retry and it's green now. What is the current state of this PR?
(+/- I should do another review)

killianmuldoon · 2023-05-15T10:31:10Z

I've got a couple of fixups pending, should be ready for another round later today.

killianmuldoon · 2023-05-15T12:15:44Z

/retest

test/e2e/config/docker.yaml

test/e2e/data/infrastructure-docker/main/clusterclass-quick-start.yaml

test/e2e/data/kubetest/conformance.yaml

test/e2e/quick_start_test.go

test/infrastructure/docker/internal/docker/machine.go

test/infrastructure/docker/internal/docker/util.go

Signed-off-by: killianmuldoon <kmuldoon@vmware.com>

sbueringer · 2023-05-15T16:54:21Z

Thank you!

/lgtm

/assign @fabriziopandini

k8s-ci-robot · 2023-05-15T16:54:27Z

LGTM label has been added.

Git tree hash: 2795c6f201d9f2b5d7b0ad07c3ccadfe8fd2c106

fabriziopandini

great work!
/lgtm
/approve

fabriziopandini · 2023-05-15T09:51:46Z

test/framework/bootstrap/kind_provider.go

@@ -70,7 +70,15 @@ func WithDockerSockMount() KindClusterOption {
 // the new kind cluster.
 func WithIPv6Family() KindClusterOption {
 	return kindClusterOptionAdapter(func(k *KindClusterProvider) {
-		k.ipFamily = clusterv1.IPv6IPFamily
+		k.ipFamily = clusterv1.DualStackIPFamily


Can we add a note why are we setting DuaStack for WithIPv6Family

k8s-ci-robot · 2023-05-16T07:33:24Z

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k8s-ci-robot added area/testing Issues or PRs related to testing cncf-cla: yes Indicates the PR's author has signed the CNCF CLA. labels Apr 12, 2023

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🌱 Use dualstack kind cluster in quick-start and startup script #8661

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killianmuldoon force-pushed the pr-e2e-dual-stack branch from 26a9598 to 4451c3e Compare May 15, 2023 14:39

Add dualstack e2e test

68213cf

Signed-off-by: killianmuldoon <kmuldoon@vmware.com>

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test/e2e: Consolidate dualstack / IPv6 / ... tests #8578

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🌱 Make kind testing cluster dualstack #8663

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🌱 Add dualstack e2e test #8517

🌱 Add dualstack e2e test #8517

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🌱 Add dualstack e2e test #8517

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