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✨ Bump Kubernetes in tests to v1.31.0 and claim support for v1.31 #11030

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Aug 13, 2024
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✨ Bump Kubernetes in tests to v1.31.0 and claim support for v1.31 #11030

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11 changes: 11 additions & 0 deletions docs/book/src/reference/versions.md
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Expand Up @@ -85,6 +85,7 @@ These diagrams show the relationships between components in a Cluster API releas
| Kubernetes v1.28 | ✓ >= v1.5.1 | ✓ | ✓ | ✓ |
| Kubernetes v1.29 | | ✓ >= v1.6.1 | ✓ | ✓ |
| Kubernetes v1.30 | | | ✓ >= v1.7.1 | ✓ |
| Kubernetes v1.31 | | | | ✓ >= v1.8.1 |


\* There is an issue with CRDs in Kubernetes v1.23.{0-2}. ClusterClass with patches is affected by that (for more details please see [this issue](https://github.com/kubernetes-sigs/cluster-api/issues/5990)). Therefore we recommend to use Kubernetes v1.23.3+ with ClusterClass.
Expand All @@ -105,6 +106,7 @@ The Core Provider also talks to API server of every Workload Cluster. Therefore,
| Kubernetes v1.28 + kubeadm/v1beta3 | ✓ >= v1.5.1 | ✓ | ✓ | ✓ |
| Kubernetes v1.29 + kubeadm/v1beta3 | | ✓ >= v1.6.1 | ✓ | ✓ |
| Kubernetes v1.30 + kubeadm/v1beta3 | | | ✓ >= v1.7.1 | ✓ |
| Kubernetes v1.31 + kubeadm/v1beta4 | | | | ✓ >= v1.8.1 |

The Kubeadm Bootstrap Provider generates kubeadm configuration using the API version recommended for the target Kubernetes version.

Expand All @@ -121,6 +123,7 @@ The Kubeadm Bootstrap Provider generates kubeadm configuration using the API ver
| Kubernetes v1.28 + etcd/v3 | ✓ >= v1.5.1 | ✓ | ✓ | ✓ |
| Kubernetes v1.29 + etcd/v3 | | ✓ >= v1.6.1 | ✓ | ✓ |
| Kubernetes v1.30 + etcd/v3 | | | ✓ >= v1.7.1 | ✓ |
| Kubernetes v1.31 + etcd/v3 | | | | ✓ >= v1.8.1 |

The Kubeadm Control Plane Provider talks to the API server and etcd members of every Workload Cluster whose control plane it owns. It uses the etcd v3 API.

Expand All @@ -140,6 +143,14 @@ The Kubeadm Control Plane requires the Kubeadm Bootstrap Provider.

#### Kubernetes version specific notes

**1.31**:

* All providers:
* It is not possible anymore to continuously apply CRDs that are setting `caBundle` to an invalid value (in our case `Cg==`). Instead of setting a dummy value the `caBundle` field should be dropped ([#10972](https://github.com/kubernetes-sigs/cluster-api/pull/10972)).
* Kubeadm Bootstrap Provider:
* `kubeadm` dropped the `control-plane update-status` phase which was used in ExperimentalRetryJoin ([#10983](https://github.com/kubernetes-sigs/cluster-api/pull/10983)).
* `kubeadm` introduced the experimental `ControlPlaneKubeletLocalMode` feature gate which will be automatically enabled by CAPI for upgrades to v1.31 to not cause network disruptions ([#10947](https://github.com/kubernetes-sigs/cluster-api/pull/10947)).

**1.29**:
* In-tree cloud providers are now switched off by default. Please use DisableCloudProviders and DisableKubeletCloudCredentialProvider feature flags if you still need this functionality. (https://github.com/kubernetes/kubernetes/pull/117503)

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8 changes: 4 additions & 4 deletions test/e2e/config/docker.yaml
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Expand Up @@ -353,11 +353,11 @@ variables:
# allowing the same e2e config file to be re-used in different Prow jobs e.g. each one with a K8s version permutation.
# The following Kubernetes versions should be the latest versions with already published kindest/node images.
# This avoids building node images in the default case which improves the test duration significantly.
KUBERNETES_VERSION_MANAGEMENT: "v1.31.0-rc.1"
KUBERNETES_VERSION: "v1.31.0-rc.1"
KUBERNETES_VERSION_MANAGEMENT: "v1.31.0"
KUBERNETES_VERSION: "v1.31.0"
KUBERNETES_VERSION_UPGRADE_FROM: "v1.30.2"
KUBERNETES_VERSION_UPGRADE_TO: "v1.31.0-rc.1"
KUBERNETES_VERSION_LATEST_CI: "ci/latest-1.31"
KUBERNETES_VERSION_UPGRADE_TO: "v1.31.0"
KUBERNETES_VERSION_LATEST_CI: "ci/latest-1.32"
ETCD_VERSION_UPGRADE_TO: "3.5.14-0"
COREDNS_VERSION_UPGRADE_TO: "v1.11.1"
DOCKER_SERVICE_DOMAIN: "cluster.local"
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4 changes: 2 additions & 2 deletions test/infrastructure/docker/examples/machine-pool.yaml
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Expand Up @@ -35,7 +35,7 @@ metadata:
namespace: default
spec:
replicas: 1
version: v1.31.0-rc.1
version: v1.31.0
machineTemplate:
infrastructureRef:
apiVersion: infrastructure.cluster.x-k8s.io/v1beta1
Expand Down Expand Up @@ -77,7 +77,7 @@ spec:
replicas: 2
template:
spec:
version: v1.31.0-rc.1
version: v1.31.0
clusterName: my-cluster
bootstrap:
configRef:
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4 changes: 2 additions & 2 deletions test/infrastructure/docker/examples/simple-cluster-ipv6.yaml
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Expand Up @@ -35,7 +35,7 @@ metadata:
namespace: default
spec:
replicas: 1
version: v1.31.0-rc.1
version: v1.31.0
machineTemplate:
infrastructureRef:
apiVersion: infrastructure.cluster.x-k8s.io/v1beta1
Expand Down Expand Up @@ -87,7 +87,7 @@ spec:
cluster.x-k8s.io/cluster-name: my-cluster
template:
spec:
version: v1.31.0-rc.1
version: v1.31.0
clusterName: my-cluster
bootstrap:
configRef:
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4 changes: 2 additions & 2 deletions test/infrastructure/docker/examples/simple-cluster-without-kcp.yaml
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Expand Up @@ -32,7 +32,7 @@ metadata:
name: controlplane-0
namespace: default
spec:
version: v1.31.0-rc.1
version: v1.31.0
clusterName: my-cluster
bootstrap:
configRef:
Expand Down Expand Up @@ -76,7 +76,7 @@ spec:
cluster.x-k8s.io/cluster-name: my-cluster
template:
spec:
version: v1.31.0-rc.1
version: v1.31.0
clusterName: my-cluster
bootstrap:
configRef:
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4 changes: 2 additions & 2 deletions test/infrastructure/docker/examples/simple-cluster.yaml
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Expand Up @@ -35,7 +35,7 @@ metadata:
namespace: default
spec:
replicas: 1
version: v1.31.0-rc.1
version: v1.31.0
machineTemplate:
infrastructureRef:
apiVersion: infrastructure.cluster.x-k8s.io/v1beta1
Expand Down Expand Up @@ -80,7 +80,7 @@ spec:
cluster.x-k8s.io/cluster-name: my-cluster
template:
spec:
version: v1.31.0-rc.1
version: v1.31.0
clusterName: my-cluster
bootstrap:
configRef:
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