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| 1 | +/* |
| 2 | +Copyright 2020 The Kubernetes Authors. |
| 3 | +
|
| 4 | +Licensed under the Apache License, Version 2.0 (the "License"); |
| 5 | +you may not use this file except in compliance with the License. |
| 6 | +You may obtain a copy of the License at |
| 7 | +
|
| 8 | + http://www.apache.org/licenses/LICENSE-2.0 |
| 9 | +
|
| 10 | +Unless required by applicable law or agreed to in writing, software |
| 11 | +distributed under the License is distributed on an "AS IS" BASIS, |
| 12 | +WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 13 | +See the License for the specific language governing permissions and |
| 14 | +limitations under the License. |
| 15 | +*/ |
| 16 | + |
| 17 | +package controllers |
| 18 | + |
| 19 | +import ( |
| 20 | + "context" |
| 21 | + |
| 22 | + "github.com/blang/semver/v4" |
| 23 | + "github.com/pkg/errors" |
| 24 | + "k8s.io/klog/v2" |
| 25 | + ctrl "sigs.k8s.io/controller-runtime" |
| 26 | + |
| 27 | + bootstrapv1 "sigs.k8s.io/cluster-api/api/bootstrap/kubeadm/v1beta2" |
| 28 | + controlplanev1 "sigs.k8s.io/cluster-api/api/controlplane/kubeadm/v1beta2" |
| 29 | + "sigs.k8s.io/cluster-api/controlplane/kubeadm/internal" |
| 30 | + "sigs.k8s.io/cluster-api/util/collections" |
| 31 | +) |
| 32 | + |
| 33 | +func (r *KubeadmControlPlaneReconciler) upgradeControlPlane( |
| 34 | + ctx context.Context, |
| 35 | + controlPlane *internal.ControlPlane, |
| 36 | + machinesRequireUpgrade collections.Machines, |
| 37 | +) (ctrl.Result, error) { |
| 38 | + log := ctrl.LoggerFrom(ctx) |
| 39 | + |
| 40 | + // TODO: handle reconciliation of etcd members and kubeadm config in case they get out of sync with cluster |
| 41 | + |
| 42 | + workloadCluster, err := controlPlane.GetWorkloadCluster(ctx) |
| 43 | + if err != nil { |
| 44 | + log.Error(err, "failed to get remote client for workload cluster", "Cluster", klog.KObj(controlPlane.Cluster)) |
| 45 | + return ctrl.Result{}, err |
| 46 | + } |
| 47 | + |
| 48 | + parsedVersion, err := semver.ParseTolerant(controlPlane.KCP.Spec.Version) |
| 49 | + if err != nil { |
| 50 | + return ctrl.Result{}, errors.Wrapf(err, "failed to parse kubernetes version %q", controlPlane.KCP.Spec.Version) |
| 51 | + } |
| 52 | + |
| 53 | + // Ensure kubeadm clusterRoleBinding for v1.29+ as per https://github.com/kubernetes/kubernetes/pull/121305 |
| 54 | + if err := workloadCluster.AllowClusterAdminPermissions(ctx, parsedVersion); err != nil { |
| 55 | + return ctrl.Result{}, errors.Wrap(err, "failed to set cluster-admin ClusterRoleBinding for kubeadm") |
| 56 | + } |
| 57 | + |
| 58 | + kubeadmCMMutators := make([]func(*bootstrapv1.ClusterConfiguration), 0) |
| 59 | + |
| 60 | + if controlPlane.KCP.Spec.KubeadmConfigSpec.ClusterConfiguration.IsDefined() { |
| 61 | + // Get the imageRepository or the correct value if nothing is set and a migration is necessary. |
| 62 | + imageRepository := internal.ImageRepositoryFromClusterConfig(controlPlane.KCP.Spec.KubeadmConfigSpec.ClusterConfiguration) |
| 63 | + |
| 64 | + kubeadmCMMutators = append(kubeadmCMMutators, |
| 65 | + workloadCluster.UpdateImageRepositoryInKubeadmConfigMap(imageRepository), |
| 66 | + workloadCluster.UpdateFeatureGatesInKubeadmConfigMap(controlPlane.KCP.Spec.KubeadmConfigSpec, parsedVersion), |
| 67 | + workloadCluster.UpdateAPIServerInKubeadmConfigMap(controlPlane.KCP.Spec.KubeadmConfigSpec.ClusterConfiguration.APIServer), |
| 68 | + workloadCluster.UpdateControllerManagerInKubeadmConfigMap(controlPlane.KCP.Spec.KubeadmConfigSpec.ClusterConfiguration.ControllerManager), |
| 69 | + workloadCluster.UpdateSchedulerInKubeadmConfigMap(controlPlane.KCP.Spec.KubeadmConfigSpec.ClusterConfiguration.Scheduler), |
| 70 | + workloadCluster.UpdateCertificateValidityPeriodDays(controlPlane.KCP.Spec.KubeadmConfigSpec.ClusterConfiguration.CertificateValidityPeriodDays), |
| 71 | + workloadCluster.UpdateEncryptionAlgorithm(controlPlane.KCP.Spec.KubeadmConfigSpec.ClusterConfiguration.EncryptionAlgorithm)) |
| 72 | + |
| 73 | + // Etcd local and external are mutually exclusive and they cannot be switched, once set. |
| 74 | + if controlPlane.IsEtcdManaged() { |
| 75 | + kubeadmCMMutators = append(kubeadmCMMutators, |
| 76 | + workloadCluster.UpdateEtcdLocalInKubeadmConfigMap(controlPlane.KCP.Spec.KubeadmConfigSpec.ClusterConfiguration.Etcd.Local)) |
| 77 | + } else { |
| 78 | + kubeadmCMMutators = append(kubeadmCMMutators, |
| 79 | + workloadCluster.UpdateEtcdExternalInKubeadmConfigMap(controlPlane.KCP.Spec.KubeadmConfigSpec.ClusterConfiguration.Etcd.External)) |
| 80 | + } |
| 81 | + } |
| 82 | + |
| 83 | + // collectively update Kubeadm config map |
| 84 | + if err = workloadCluster.UpdateClusterConfiguration(ctx, parsedVersion, kubeadmCMMutators...); err != nil { |
| 85 | + return ctrl.Result{}, err |
| 86 | + } |
| 87 | + |
| 88 | + switch controlPlane.KCP.Spec.Rollout.Strategy.Type { |
| 89 | + case controlplanev1.RollingUpdateStrategyType: |
| 90 | + // RolloutStrategy is currently defaulted and validated to be RollingUpdate |
| 91 | + // We can ignore MaxUnavailable because we are enforcing health checks before we get here. |
| 92 | + maxNodes := *controlPlane.KCP.Spec.Replicas + int32(controlPlane.KCP.Spec.Rollout.Strategy.RollingUpdate.MaxSurge.IntValue()) |
| 93 | + if int32(controlPlane.Machines.Len()) < maxNodes { |
| 94 | + // scaleUp ensures that we don't continue scaling up while waiting for Machines to have NodeRefs |
| 95 | + return r.scaleUpControlPlane(ctx, controlPlane) |
| 96 | + } |
| 97 | + return r.scaleDownControlPlane(ctx, controlPlane, machinesRequireUpgrade) |
| 98 | + default: |
| 99 | + log.Info("RolloutStrategy type is not set to RollingUpdate, unable to determine the strategy for rolling out machines") |
| 100 | + return ctrl.Result{}, nil |
| 101 | + } |
| 102 | +} |
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