Supported Labels:

LabelNote
cluster.x-k8s.io/cluster-nameIt is set on machines linked to a cluster and external objects(bootstrap and infrastructure providers).
topology.cluster.x-k8s.io/ownedIt is set on all the object which are managed as part of a ClusterTopology.
topology.cluster.x-k8s.io/deployment-nameIt is set on the generated MachineDeployment objects to track the name of the MachineDeployment topology it represents.
cluster.x-k8s.io/providerIt is set on components in the provider manifest. The label allows one to easily identify all the components belonging to a provider. The clusterctl tool uses this label for implementing provider’s lifecycle operations.
cluster.x-k8s.io/watch-filterIt can be applied to any Cluster API object. Controllers which allow for selective reconciliation may check this label and proceed with reconciliation of the object only if this label and a configured value is present.
cluster.x-k8s.io/interruptibleIt is used to mark the nodes that run on interruptible instances.
cluster.x-k8s.io/control-planeIt is set on machines or related objects that are part of a control plane.
cluster.x-k8s.io/set-nameIt is set on machines if they’re controlled by MachineSet.
cluster.x-k8s.io/deployment-nameIt is set on machines if they’re controlled by a MachineDeployment.
machine-template-hashIt is applied to Machines in a MachineDeployment containing the hash of the template.

Supported Annotations:

AnnotationNote
clusterctl.cluster.x-k8s.io/skip-crd-name-preflight-checkCan be placed on provider CRDs, so that clusterctl doesn’t emit a warning if the CRD doesn’t comply with Cluster APIs naming scheme. Only CRDs that are referenced by core Cluster API CRDs have to comply with the naming scheme.
unsafe.topology.cluster.x-k8s.io/disable-update-class-name-checkIt can be used to disable the webhook check on update that disallows a pre-existing Cluster to be populated with Topology information and Class.
cluster.x-k8s.io/cluster-nameIt is set on nodes identifying the name of the cluster the node belongs to.
cluster.x-k8s.io/cluster-namespaceIt is set on nodes identifying the namespace of the cluster the node belongs to.
cluster.x-k8s.io/machineIt is set on nodes identifying the machine the node belongs to.
cluster.x-k8s.io/owner-kindIt is set on nodes identifying the owner kind.
cluster.x-k8s.io/owner-nameIt is set on nodes identifying the owner name.
cluster.x-k8s.io/pausedIt can be applied to any Cluster API object to prevent a controller from processing a resource. Controllers working with Cluster API objects must check the existence of this annotation on the reconciled object.
cluster.x-k8s.io/disable-machine-createIt can be used to signal a MachineSet to stop creating new machines. It is utilized in the OnDelete MachineDeploymentStrategy to allow the MachineDeployment controller to scale down older MachineSets when Machines are deleted and add the new replicas to the latest MachineSet.
cluster.x-k8s.io/delete-machineIt marks control plane and worker nodes that will be given priority for deletion when KCP or a MachineSet scales down. It is given top priority on all delete policies.
cluster.x-k8s.io/cloned-from-nameIt is the infrastructure machine annotation that stores the name of the infrastructure template resource that was cloned for the machine. This annotation is set only during cloning a template. Older/adopted machines will not have this annotation.
cluster.x-k8s.io/cloned-from-groupkindIt is the infrastructure machine annotation that stores the group-kind of the infrastructure template resource that was cloned for the machine. This annotation is set only during cloning a template. Older/adopted machines will not have this annotation.
cluster.x-k8s.io/skip-remediationIt is used to mark the machines that should not be considered for remediation by MachineHealthCheck reconciler.
cluster.x-k8s.io/managed-byIt can be applied to InfraCluster resources to signify that some external system is managing the cluster infrastructure. Provider InfraCluster controllers will ignore resources with this annotation. An external controller must fulfill the contract of the InfraCluster resource. External infrastructure providers should ensure that the annotation, once set, cannot be removed.
cluster.x-k8s.io/replicas-managed-byIt can be applied to MachinePool resources to signify that some external system is managing infrastructure scaling for that pool. See the MachinePool documentation for more details.
topology.cluster.x-k8s.io/dry-runIt is an annotation that gets set on objects by the topology controller only during a server side dry run apply operation. It is used for validating update webhooks for objects which get updated by template rotation (e.g. InfrastructureMachineTemplate). When the annotation is set and the admission request is a dry run, the webhook should deny validation due to immutability. By that the request will succeed (without any changes to the actual object because it is a dry run) and the topology controller will receive the resulting object.
machine.cluster.x-k8s.io/certificates-expiryIt captures the expiry date of the machine certificates in RFC3339 format. It is used to trigger rollout of control plane machines before certificates expire. It can be set on BootstrapConfig and Machine objects. The value set on Machine object takes precedence. The annotation is only used by control plane machines.
machine.cluster.x-k8s.io/exclude-node-drainingIt explicitly skips node draining if set.
machine.cluster.x-k8s.io/exclude-wait-for-node-volume-detachIt explicitly skips the waiting for node volume detaching if set.
pre-drain.delete.hook.machine.cluster.x-k8s.ioIt specifies the prefix we search each annotation for during the pre-drain.delete lifecycle hook to pause reconciliation of deletion. These hooks will prevent removal of draining the associated node until all are removed.
pre-terminate.delete.hook.machine.cluster.x-k8s.ioIt specifies the prefix we search each annotation for during the pre-terminate.delete lifecycle hook to pause reconciliation of deletion. These hooks will prevent removal of an instance from an infrastructure provider until all are removed.
machinedeployment.clusters.x-k8s.io/revisionIt is the revision annotation of a machine deployment’s machine sets which records its rollout sequence.
machinedeployment.clusters.x-k8s.io/revision-historyIt maintains the history of all old revisions that a machine set has served for a machine deployment.
machinedeployment.clusters.x-k8s.io/desired-replicasIt is the desired replicas for a machine deployment recorded as an annotation in its machine sets. Helps in separating scaling events from the rollout process and for determining if the new machine set for a deployment is really saturated.
machinedeployment.clusters.x-k8s.io/max-replicasIt is the maximum replicas a deployment can have at a given point, which is machinedeployment.spec.replicas + maxSurge. Used by the underlying machine sets to estimate their proportions in case the deployment has surge replicas.
controlplane.cluster.x-k8s.io/skip-corednsIt explicitly skips reconciling CoreDNS if set.
controlplane.cluster.x-k8s.io/skip-kube-proxyIt explicitly skips reconciling kube-proxy if set.
controlplane.cluster.x-k8s.io/kubeadm-cluster-configurationIt is a machine annotation that stores the json-marshalled string of KCP ClusterConfiguration. This annotation is used to detect any changes in ClusterConfiguration and trigger machine rollout in KCP.