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🌱 Implement topology validations for topology kubernetes version upgrades #10063

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4 changes: 4 additions & 0 deletions api/v1beta1/common_types.go
Original file line number Diff line number Diff line change
Expand Up @@ -68,6 +68,10 @@ const (
// update that disallows a pre-existing Cluster to be populated with Topology information and Class.
ClusterTopologyUnsafeUpdateClassNameAnnotation = "unsafe.topology.cluster.x-k8s.io/disable-update-class-name-check"

// ClusterTopologyUnsafeUpdateVersionAnnotation can be used to disable the webhook checks on
// update that disallows updating the .topology.spec.version on certain conditions.
ClusterTopologyUnsafeUpdateVersionAnnotation = "unsafe.topology.cluster.x-k8s.io/disable-update-version-check"
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// ProviderNameLabel is the label set on components in the provider manifest.
// This label allows to easily identify all the components belonging to a provider; the clusterctl
// tool uses this label for implementing provider's lifecycle operations.
Expand Down
5 changes: 5 additions & 0 deletions controllers/remote/cluster_cache_tracker.go
Original file line number Diff line number Diff line change
Expand Up @@ -189,6 +189,11 @@ func (t *ClusterCacheTracker) GetClient(ctx context.Context, cluster client.Obje
return accessor.client, nil
}

// GetReader returns a cached read-only client for the given cluster.
func (t *ClusterCacheTracker) GetReader(ctx context.Context, cluster client.ObjectKey) (client.Reader, error) {
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return t.GetClient(ctx, cluster)
}

// GetRESTConfig returns a cached REST config for the given cluster.
func (t *ClusterCacheTracker) GetRESTConfig(ctc context.Context, cluster client.ObjectKey) (*rest.Config, error) {
accessor, err := t.getClusterAccessor(ctc, cluster, t.indexes...)
Expand Down
56 changes: 7 additions & 49 deletions internal/controllers/topology/cluster/scope/state.go
Original file line number Diff line number Diff line change
Expand Up @@ -18,16 +18,14 @@ package scope

import (
"context"
"fmt"

"github.com/pkg/errors"
corev1 "k8s.io/api/core/v1"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/apimachinery/pkg/apis/meta/v1/unstructured"
"sigs.k8s.io/controller-runtime/pkg/client"

clusterv1 "sigs.k8s.io/cluster-api/api/v1beta1"
expv1 "sigs.k8s.io/cluster-api/exp/api/v1beta1"
"sigs.k8s.io/cluster-api/internal/topology/check"
)

// ClusterState holds all the objects representing the state of a managed Cluster topology.
Expand Down Expand Up @@ -68,7 +66,7 @@ type MachineDeploymentsStateMap map[string]*MachineDeploymentState

// Upgrading returns the list of the machine deployments
// that are upgrading.
func (mds MachineDeploymentsStateMap) Upgrading(ctx context.Context, c client.Client) ([]string, error) {
func (mds MachineDeploymentsStateMap) Upgrading(ctx context.Context, c client.Reader) ([]string, error) {
names := []string{}
for _, md := range mds {
upgrading, err := md.IsUpgrading(ctx, c)
Expand Down Expand Up @@ -101,40 +99,16 @@ type MachineDeploymentState struct {
// IsUpgrading determines if the MachineDeployment is upgrading.
// A machine deployment is considered upgrading if at least one of the Machines of this
// MachineDeployment has a different version.
func (md *MachineDeploymentState) IsUpgrading(ctx context.Context, c client.Client) (bool, error) {
// If the MachineDeployment has no version there is no definitive way to check if it is upgrading. Therefore, return false.
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This code got moved to internal/topology/check/upgrade.go

// Note: This case should not happen.
if md.Object.Spec.Template.Spec.Version == nil {
return false, nil
}
selectorMap, err := metav1.LabelSelectorAsMap(&md.Object.Spec.Selector)
if err != nil {
return false, errors.Wrapf(err, "failed to check if MachineDeployment %s is upgrading: failed to convert label selector to map", md.Object.Name)
}
machines := &clusterv1.MachineList{}
if err := c.List(ctx, machines, client.InNamespace(md.Object.Namespace), client.MatchingLabels(selectorMap)); err != nil {
return false, errors.Wrapf(err, "failed to check if MachineDeployment %s is upgrading: failed to list Machines", md.Object.Name)
}
mdVersion := *md.Object.Spec.Template.Spec.Version
// Check if the versions of the all the Machines match the MachineDeployment version.
for i := range machines.Items {
machine := machines.Items[i]
if machine.Spec.Version == nil {
return false, fmt.Errorf("failed to check if MachineDeployment %s is upgrading: Machine %s has no version", md.Object.Name, machine.Name)
}
if *machine.Spec.Version != mdVersion {
return true, nil
}
}
return false, nil
func (md *MachineDeploymentState) IsUpgrading(ctx context.Context, c client.Reader) (bool, error) {
return check.IsMachineDeploymentUpgrading(ctx, c, md.Object)
}

// MachinePoolsStateMap holds a collection of MachinePool states.
type MachinePoolsStateMap map[string]*MachinePoolState

// Upgrading returns the list of the machine pools
// that are upgrading.
func (mps MachinePoolsStateMap) Upgrading(ctx context.Context, c client.Client) ([]string, error) {
func (mps MachinePoolsStateMap) Upgrading(ctx context.Context, c client.Reader) ([]string, error) {
names := []string{}
for _, mp := range mps {
upgrading, err := mp.IsUpgrading(ctx, c)
Expand Down Expand Up @@ -163,22 +137,6 @@ type MachinePoolState struct {
// IsUpgrading determines if the MachinePool is upgrading.
// A machine pool is considered upgrading if at least one of the Machines of this
// MachinePool has a different version.
func (mp *MachinePoolState) IsUpgrading(ctx context.Context, c client.Client) (bool, error) {
// If the MachinePool has no version there is no definitive way to check if it is upgrading. Therefore, return false.
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This code got moved to internal/topology/check/upgrade.go

// Note: This case should not happen.
if mp.Object.Spec.Template.Spec.Version == nil {
return false, nil
}
mpVersion := *mp.Object.Spec.Template.Spec.Version
// Check if the kubelet versions of the MachinePool noderefs match the MachinePool version.
for _, nodeRef := range mp.Object.Status.NodeRefs {
node := &corev1.Node{}
if err := c.Get(ctx, client.ObjectKey{Name: nodeRef.Name}, node); err != nil {
return false, fmt.Errorf("failed to check if MachinePool %s is upgrading: failed to get Node %s", mp.Object.Name, nodeRef.Name)
}
if mpVersion != node.Status.NodeInfo.KubeletVersion {
return true, nil
}
}
return false, nil
func (mp *MachinePoolState) IsUpgrading(ctx context.Context, c client.Reader) (bool, error) {
return check.IsMachinePoolUpgrading(ctx, c, mp.Object)
}
86 changes: 0 additions & 86 deletions internal/controllers/topology/cluster/scope/state_test.go
Original file line number Diff line number Diff line change
Expand Up @@ -29,92 +29,6 @@ import (
"sigs.k8s.io/cluster-api/internal/test/builder"
)

func TestIsUpgrading(t *testing.T) {
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This tests got moved to internal/topology/check/upgrade_test.go

g := NewWithT(t)
scheme := runtime.NewScheme()
g.Expect(clusterv1.AddToScheme(scheme)).To(Succeed())

tests := []struct {
name string
md *clusterv1.MachineDeployment
machines []*clusterv1.Machine
want bool
wantErr bool
}{
{
name: "should return false if all the machines of MachineDeployment have the same version as the MachineDeployment",
md: builder.MachineDeployment("ns", "md1").
WithClusterName("cluster1").
WithVersion("v1.2.3").
Build(),
machines: []*clusterv1.Machine{
builder.Machine("ns", "machine1").
WithClusterName("cluster1").
WithVersion("v1.2.3").
Build(),
builder.Machine("ns", "machine2").
WithClusterName("cluster1").
WithVersion("v1.2.3").
Build(),
},
want: false,
wantErr: false,
},
{
name: "should return true if at least one of the machines of MachineDeployment has a different version",
md: builder.MachineDeployment("ns", "md1").
WithClusterName("cluster1").
WithVersion("v1.2.3").
Build(),
machines: []*clusterv1.Machine{
builder.Machine("ns", "machine1").
WithClusterName("cluster1").
WithVersion("v1.2.3").
Build(),
builder.Machine("ns", "machine2").
WithClusterName("cluster1").
WithVersion("v1.2.2").
Build(),
},
want: true,
wantErr: false,
},
{
name: "should return false if the MachineDeployment has no machines (creation phase)",
md: builder.MachineDeployment("ns", "md1").
WithClusterName("cluster1").
WithVersion("v1.2.3").
Build(),
machines: []*clusterv1.Machine{},
want: false,
wantErr: false,
},
}

for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
g := NewWithT(t)
ctx := context.Background()
objs := []client.Object{}
objs = append(objs, tt.md)
for _, m := range tt.machines {
objs = append(objs, m)
}
fakeClient := fake.NewClientBuilder().WithScheme(scheme).WithObjects(objs...).Build()
mdState := &MachineDeploymentState{
Object: tt.md,
}
got, err := mdState.IsUpgrading(ctx, fakeClient)
if tt.wantErr {
g.Expect(err).To(HaveOccurred())
} else {
g.Expect(err).ToNot(HaveOccurred())
g.Expect(got).To(Equal(tt.want))
}
})
}
}

func TestUpgrading(t *testing.T) {
g := NewWithT(t)
scheme := runtime.NewScheme()
Expand Down
84 changes: 84 additions & 0 deletions internal/topology/check/upgrade.go
Original file line number Diff line number Diff line change
@@ -0,0 +1,84 @@
/*
Copyright 2024 The Kubernetes Authors.

Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at

http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/

package check

import (
"context"
"fmt"

"github.com/pkg/errors"
corev1 "k8s.io/api/core/v1"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"sigs.k8s.io/controller-runtime/pkg/client"

clusterv1 "sigs.k8s.io/cluster-api/api/v1beta1"
expv1 "sigs.k8s.io/cluster-api/exp/api/v1beta1"
)

// IsMachineDeploymentUpgrading determines if the MachineDeployment is upgrading.
// A machine deployment is considered upgrading if at least one of the Machines of this
// MachineDeployment has a different version.
func IsMachineDeploymentUpgrading(ctx context.Context, c client.Reader, md *clusterv1.MachineDeployment) (bool, error) {
// If the MachineDeployment has no version there is no definitive way to check if it is upgrading. Therefore, return false.
// Note: This case should not happen.
if md.Spec.Template.Spec.Version == nil {
return false, nil
}
selectorMap, err := metav1.LabelSelectorAsMap(&md.Spec.Selector)
if err != nil {
return false, errors.Wrapf(err, "failed to check if MachineDeployment %s is upgrading: failed to convert label selector to map", md.Name)
}
machines := &clusterv1.MachineList{}
if err := c.List(ctx, machines, client.InNamespace(md.Namespace), client.MatchingLabels(selectorMap)); err != nil {
return false, errors.Wrapf(err, "failed to check if MachineDeployment %s is upgrading: failed to list Machines", md.Name)
}
mdVersion := *md.Spec.Template.Spec.Version
// Check if the versions of the all the Machines match the MachineDeployment version.
for i := range machines.Items {
machine := machines.Items[i]
if machine.Spec.Version == nil {
return false, fmt.Errorf("failed to check if MachineDeployment %s is upgrading: Machine %s has no version", md.Name, machine.Name)
}
if *machine.Spec.Version != mdVersion {
return true, nil
}
}
return false, nil
}

// IsMachinePoolUpgrading determines if the MachinePool is upgrading.
// A machine pool is considered upgrading if at least one of the Machines of this
// MachinePool has a different version.
func IsMachinePoolUpgrading(ctx context.Context, c client.Reader, mp *expv1.MachinePool) (bool, error) {
// If the MachinePool has no version there is no definitive way to check if it is upgrading. Therefore, return false.
// Note: This case should not happen.
if mp.Spec.Template.Spec.Version == nil {
return false, nil
}
mpVersion := *mp.Spec.Template.Spec.Version
// Check if the kubelet versions of the MachinePool noderefs match the MachinePool version.
for _, nodeRef := range mp.Status.NodeRefs {
node := &corev1.Node{}
if err := c.Get(ctx, client.ObjectKey{Name: nodeRef.Name}, node); err != nil {
return false, fmt.Errorf("failed to check if MachinePool %s is upgrading: failed to get Node %s", mp.Name, nodeRef.Name)
}
if mpVersion != node.Status.NodeInfo.KubeletVersion {
return true, nil
}
}
return false, nil
}
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