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Specification

Property Type Description

apiVersion

string

APIVersion defines the versioned schema of this representation of an object. Servers should convert recognized schemas to the latest internal value, and may reject unrecognized values. More info: https://git.k8s.io/community/contributors/devel/sig-architecture/api-conventions.md#resources

kind

string

Kind is a string value representing the REST resource this object represents. Servers may infer this from the endpoint the client submits requests to. Cannot be updated. In CamelCase. More info: https://git.k8s.io/community/contributors/devel/sig-architecture/api-conventions.md#types-kinds

metadata

ObjectMeta

Standard object’s metadata. More info: https://git.k8s.io/community/contributors/devel/sig-architecture/api-conventions.md#metadata

spec

object

MachineSetSpec defines the desired state of MachineSet.

status

object

MachineSetStatus defines the observed state of MachineSet.

.spec

Description

MachineSetSpec defines the desired state of MachineSet.

Type

object

Required
  • clusterName

  • selector

Property Type Description

clusterName

string

ClusterName is the name of the Cluster this object belongs to.

deletePolicy

string

DeletePolicy defines the policy used to identify nodes to delete when downscaling. Defaults to "Random". Valid values are "Random, "Newest", "Oldest"

minReadySeconds

integer

MinReadySeconds is the minimum number of seconds for which a Node for a newly created machine should be ready before considering the replica available. Defaults to 0 (machine will be considered available as soon as the Node is ready)

replicas

integer

Replicas is the number of desired replicas. This is a pointer to distinguish between explicit zero and unspecified.

Defaults to: * if the Kubernetes autoscaler min size and max size annotations are set: - if it’s a new MachineSet, use min size - if the replicas field of the old MachineSet is < min size, use min size - if the replicas field of the old MachineSet is > max size, use max size - if the replicas field of the old MachineSet is in the (min size, max size) range, keep the value from the oldMS * otherwise use 1 Note: Defaulting will be run whenever the replicas field is not set: * A new MachineSet is created with replicas not set. * On an existing MachineSet the replicas field was first set and is now unset. Those cases are especially relevant for the following Kubernetes autoscaler use cases: * A new MachineSet is created and replicas should be managed by the autoscaler * An existing MachineSet which initially wasn’t controlled by the autoscaler should be later controlled by the autoscaler

selector

object

Selector is a label query over machines that should match the replica count. Label keys and values that must match in order to be controlled by this MachineSet. It must match the machine template’s labels. More info: https://kubernetes.io/docs/concepts/overview/working-with-objects/labels/#label-selectors

template

object

Template is the object that describes the machine that will be created if insufficient replicas are detected. Object references to custom resources are treated as templates.

.spec.selector

Description

Selector is a label query over machines that should match the replica count. Label keys and values that must match in order to be controlled by this MachineSet. It must match the machine template’s labels. More info: https://kubernetes.io/docs/concepts/overview/working-with-objects/labels/#label-selectors

Type

object

Property Type Description

matchExpressions

array

matchExpressions is a list of label selector requirements. The requirements are ANDed.

matchExpressions[]

object

A label selector requirement is a selector that contains values, a key, and an operator that relates the key and values.

matchLabels

object (string)

matchLabels is a map of {key,value} pairs. A single {key,value} in the matchLabels map is equivalent to an element of matchExpressions, whose key field is "key", the operator is "In", and the values array contains only "value". The requirements are ANDed.

.spec.selector.matchExpressions

Description

matchExpressions is a list of label selector requirements. The requirements are ANDed.

Type

array

.spec.selector.matchExpressions[]

Description

A label selector requirement is a selector that contains values, a key, and an operator that relates the key and values.

Type

object

Required
  • key

  • operator

Property Type Description

key

string

key is the label key that the selector applies to.

operator

string

operator represents a key’s relationship to a set of values. Valid operators are In, NotIn, Exists and DoesNotExist.

values

array (string)

values is an array of string values. If the operator is In or NotIn, the values array must be non-empty. If the operator is Exists or DoesNotExist, the values array must be empty. This array is replaced during a strategic merge patch.

.spec.template

Description

Template is the object that describes the machine that will be created if insufficient replicas are detected. Object references to custom resources are treated as templates.

Type

object

Property Type Description

metadata

object

Standard object’s metadata. More info: https://git.k8s.io/community/contributors/devel/sig-architecture/api-conventions.md#metadata

spec

object

Specification of the desired behavior of the machine. More info: https://git.k8s.io/community/contributors/devel/sig-architecture/api-conventions.md#spec-and-status

.spec.template.metadata

Description
Type

object

Property Type Description

annotations

object (string)

Annotations is an unstructured key value map stored with a resource that may be set by external tools to store and retrieve arbitrary metadata. They are not queryable and should be preserved when modifying objects. More info: http://kubernetes.io/docs/user-guide/annotations

labels

object (string)

Map of string keys and values that can be used to organize and categorize (scope and select) objects. May match selectors of replication controllers and services. More info: http://kubernetes.io/docs/user-guide/labels

.spec.template.spec

Description

Specification of the desired behavior of the machine. More info: https://git.k8s.io/community/contributors/devel/sig-architecture/api-conventions.md#spec-and-status

Type

object

Required
  • bootstrap

  • clusterName

  • infrastructureRef

Property Type Description

bootstrap

object

Bootstrap is a reference to a local struct which encapsulates fields to configure the Machine’s bootstrapping mechanism.

clusterName

string

ClusterName is the name of the Cluster this object belongs to.

failureDomain

string

FailureDomain is the failure domain the machine will be created in. Must match a key in the FailureDomains map stored on the cluster object.

infrastructureRef

object

InfrastructureRef is a required reference to a custom resource offered by an infrastructure provider.

nodeDeletionTimeout

string

NodeDeletionTimeout defines how long the controller will attempt to delete the Node that the Machine hosts after the Machine is marked for deletion. A duration of 0 will retry deletion indefinitely. Defaults to 10 seconds.

nodeDrainTimeout

string

NodeDrainTimeout is the total amount of time that the controller will spend on draining a node. The default value is 0, meaning that the node can be drained without any time limitations. NOTE: NodeDrainTimeout is different from kubectl drain --timeout

nodeVolumeDetachTimeout

string

NodeVolumeDetachTimeout is the total amount of time that the controller will spend on waiting for all volumes to be detached. The default value is 0, meaning that the volumes can be detached without any time limitations.

providerID

string

ProviderID is the identification ID of the machine provided by the provider. This field must match the provider ID as seen on the node object corresponding to this machine. This field is required by higher level consumers of cluster-api. Example use case is cluster autoscaler with cluster-api as provider. Clean-up logic in the autoscaler compares machines to nodes to find out machines at provider which could not get registered as Kubernetes nodes. With cluster-api as a generic out-of-tree provider for autoscaler, this field is required by autoscaler to be able to have a provider view of the list of machines. Another list of nodes is queried from the k8s apiserver and then a comparison is done to find out unregistered machines and are marked for delete. This field will be set by the actuators and consumed by higher level entities like autoscaler that will be interfacing with cluster-api as generic provider.

version

string

Version defines the desired Kubernetes version. This field is meant to be optionally used by bootstrap providers.

.spec.template.spec.bootstrap

Description

Bootstrap is a reference to a local struct which encapsulates fields to configure the Machine’s bootstrapping mechanism.

Type

object

Property Type Description

configRef

object

ConfigRef is a reference to a bootstrap provider-specific resource that holds configuration details. The reference is optional to allow users/operators to specify Bootstrap.DataSecretName without the need of a controller.

dataSecretName

string

DataSecretName is the name of the secret that stores the bootstrap data script. If nil, the Machine should remain in the Pending state.

.spec.template.spec.bootstrap.configRef

Description

ConfigRef is a reference to a bootstrap provider-specific resource that holds configuration details. The reference is optional to allow users/operators to specify Bootstrap.DataSecretName without the need of a controller.

Type

object

Property Type Description

apiVersion

string

API version of the referent.

fieldPath

string

If referring to a piece of an object instead of an entire object, this string should contain a valid JSON/Go field access statement, such as desiredState.manifest.containers[2]. For example, if the object reference is to a container within a pod, this would take on a value like: "spec.containers{name}" (where "name" refers to the name of the container that triggered the event) or if no container name is specified "spec.containers[2]" (container with index 2 in this pod). This syntax is chosen only to have some well-defined way of referencing a part of an object. TODO: this design is not final and this field is subject to change in the future.

kind

string

Kind of the referent. More info: https://git.k8s.io/community/contributors/devel/sig-architecture/api-conventions.md#types-kinds

name

string

Name of the referent. More info: https://kubernetes.io/docs/concepts/overview/working-with-objects/names/#names

namespace

string

Namespace of the referent. More info: https://kubernetes.io/docs/concepts/overview/working-with-objects/namespaces/

resourceVersion

string

Specific resourceVersion to which this reference is made, if any. More info: https://git.k8s.io/community/contributors/devel/sig-architecture/api-conventions.md#concurrency-control-and-consistency

uid

string

UID of the referent. More info: https://kubernetes.io/docs/concepts/overview/working-with-objects/names/#uids

.spec.template.spec.infrastructureRef

Description

InfrastructureRef is a required reference to a custom resource offered by an infrastructure provider.

Type

object

Property Type Description

apiVersion

string

API version of the referent.

fieldPath

string

If referring to a piece of an object instead of an entire object, this string should contain a valid JSON/Go field access statement, such as desiredState.manifest.containers[2]. For example, if the object reference is to a container within a pod, this would take on a value like: "spec.containers{name}" (where "name" refers to the name of the container that triggered the event) or if no container name is specified "spec.containers[2]" (container with index 2 in this pod). This syntax is chosen only to have some well-defined way of referencing a part of an object. TODO: this design is not final and this field is subject to change in the future.

kind

string

Kind of the referent. More info: https://git.k8s.io/community/contributors/devel/sig-architecture/api-conventions.md#types-kinds

name

string

Name of the referent. More info: https://kubernetes.io/docs/concepts/overview/working-with-objects/names/#names

namespace

string

Namespace of the referent. More info: https://kubernetes.io/docs/concepts/overview/working-with-objects/namespaces/

resourceVersion

string

Specific resourceVersion to which this reference is made, if any. More info: https://git.k8s.io/community/contributors/devel/sig-architecture/api-conventions.md#concurrency-control-and-consistency

uid

string

UID of the referent. More info: https://kubernetes.io/docs/concepts/overview/working-with-objects/names/#uids

.status

Description

MachineSetStatus defines the observed state of MachineSet.

Type

object

Property Type Description

availableReplicas

integer

The number of available replicas (ready for at least minReadySeconds) for this MachineSet.

conditions

array

Conditions defines current service state of the MachineSet.

conditions[]

object

Condition defines an observation of a Cluster API resource operational state.

failureMessage

string

failureReason

string

In the event that there is a terminal problem reconciling the replicas, both FailureReason and FailureMessage will be set. FailureReason will be populated with a succinct value suitable for machine interpretation, while FailureMessage will contain a more verbose string suitable for logging and human consumption.

These fields should not be set for transitive errors that a controller faces that are expected to be fixed automatically over time (like service outages), but instead indicate that something is fundamentally wrong with the MachineTemplate’s spec or the configuration of the machine controller, and that manual intervention is required. Examples of terminal errors would be invalid combinations of settings in the spec, values that are unsupported by the machine controller, or the responsible machine controller itself being critically misconfigured.

Any transient errors that occur during the reconciliation of Machines can be added as events to the MachineSet object and/or logged in the controller’s output.

fullyLabeledReplicas

integer

The number of replicas that have labels matching the labels of the machine template of the MachineSet.

observedGeneration

integer

ObservedGeneration reflects the generation of the most recently observed MachineSet.

readyReplicas

integer

The number of ready replicas for this MachineSet. A machine is considered ready when the node has been created and is "Ready".

replicas

integer

Replicas is the most recently observed number of replicas.

selector

string

Selector is the same as the label selector but in the string format to avoid introspection by clients. The string will be in the same format as the query-param syntax. More info about label selectors: http://kubernetes.io/docs/user-guide/labels#label-selectors

.status.conditions

Description

Conditions defines current service state of the MachineSet.

Type

array

.status.conditions[]

Description

Condition defines an observation of a Cluster API resource operational state.

Type

object

Required
  • lastTransitionTime

  • status

  • type

Property Type Description

lastTransitionTime

string

Last time the condition transitioned from one status to another. This should be when the underlying condition changed. If that is not known, then using the time when the API field changed is acceptable.

message

string

A human readable message indicating details about the transition. This field may be empty.

reason

string

The reason for the condition’s last transition in CamelCase. The specific API may choose whether or not this field is considered a guaranteed API. This field may not be empty.

severity

string

Severity provides an explicit classification of Reason code, so the users or machines can immediately understand the current situation and act accordingly. The Severity field MUST be set only when Status=False.

status

string

Status of the condition, one of True, False, Unknown.

type

string

Type of condition in CamelCase or in foo.example.com/CamelCase. Many .condition.type values are consistent across resources like Available, but because arbitrary conditions can be useful (see .node.status.conditions), the ability to deconflict is important.

API endpoints

The following API endpoints are available:

  • /apis/cluster.x-k8s.io/v1beta1/machinesets

    • GET: list objects of kind MachineSet

  • /apis/cluster.x-k8s.io/v1beta1/namespaces/{namespace}/machinesets

    • DELETE: delete collection of MachineSet

    • GET: list objects of kind MachineSet

    • POST: create a MachineSet

  • /apis/cluster.x-k8s.io/v1beta1/namespaces/{namespace}/machinesets/{name}

    • DELETE: delete a MachineSet

    • GET: read the specified MachineSet

    • PATCH: partially update the specified MachineSet

    • PUT: replace the specified MachineSet

  • /apis/cluster.x-k8s.io/v1beta1/namespaces/{namespace}/machinesets/{name}/scale

    • GET: read scale of the specified MachineSet

    • PATCH: partially update scale of the specified MachineSet

    • PUT: replace scale of the specified MachineSet

  • /apis/cluster.x-k8s.io/v1beta1/namespaces/{namespace}/machinesets/{name}/status

    • GET: read status of the specified MachineSet

    • PATCH: partially update status of the specified MachineSet

    • PUT: replace status of the specified MachineSet

/apis/cluster.x-k8s.io/v1beta1/machinesets

HTTP method

GET

Description

list objects of kind MachineSet

Table 1. HTTP responses
HTTP code Reponse body

200 - OK

MachineSetList schema

401 - Unauthorized

Empty

/apis/cluster.x-k8s.io/v1beta1/namespaces/{namespace}/machinesets

HTTP method

DELETE

Description

delete collection of MachineSet

Table 2. HTTP responses
HTTP code Reponse body

200 - OK

Status schema

401 - Unauthorized

Empty

HTTP method

GET

Description

list objects of kind MachineSet

Table 3. HTTP responses
HTTP code Reponse body

200 - OK

MachineSetList schema

401 - Unauthorized

Empty

HTTP method

POST

Description

create a MachineSet

Table 4. Query parameters
Parameter Type Description

dryRun

string

When present, indicates that modifications should not be persisted. An invalid or unrecognized dryRun directive will result in an error response and no further processing of the request. Valid values are: - All: all dry run stages will be processed

fieldValidation

string

fieldValidation instructs the server on how to handle objects in the request (POST/PUT/PATCH) containing unknown or duplicate fields. Valid values are: - Ignore: This will ignore any unknown fields that are silently dropped from the object, and will ignore all but the last duplicate field that the decoder encounters. This is the default behavior prior to v1.23. - Warn: This will send a warning via the standard warning response header for each unknown field that is dropped from the object, and for each duplicate field that is encountered. The request will still succeed if there are no other errors, and will only persist the last of any duplicate fields. This is the default in v1.23+ - Strict: This will fail the request with a BadRequest error if any unknown fields would be dropped from the object, or if any duplicate fields are present. The error returned from the server will contain all unknown and duplicate fields encountered.

Table 5. Body parameters
Parameter Type Description

body

MachineSet schema

Table 6. HTTP responses
HTTP code Reponse body

200 - OK

MachineSet schema

201 - Created

MachineSet schema

202 - Accepted

MachineSet schema

401 - Unauthorized

Empty

/apis/cluster.x-k8s.io/v1beta1/namespaces/{namespace}/machinesets/{name}

Table 7. Global path parameters
Parameter Type Description

name

string

name of the MachineSet

HTTP method

DELETE

Description

delete a MachineSet

Table 8. Query parameters
Parameter Type Description

dryRun

string

When present, indicates that modifications should not be persisted. An invalid or unrecognized dryRun directive will result in an error response and no further processing of the request. Valid values are: - All: all dry run stages will be processed

Table 9. HTTP responses
HTTP code Reponse body

200 - OK

Status schema

202 - Accepted

Status schema

401 - Unauthorized

Empty

HTTP method

GET

Description

read the specified MachineSet

Table 10. HTTP responses
HTTP code Reponse body

200 - OK

MachineSet schema

401 - Unauthorized

Empty

HTTP method

PATCH

Description

partially update the specified MachineSet

Table 11. Query parameters
Parameter Type Description

dryRun

string

When present, indicates that modifications should not be persisted. An invalid or unrecognized dryRun directive will result in an error response and no further processing of the request. Valid values are: - All: all dry run stages will be processed

fieldValidation

string

fieldValidation instructs the server on how to handle objects in the request (POST/PUT/PATCH) containing unknown or duplicate fields. Valid values are: - Ignore: This will ignore any unknown fields that are silently dropped from the object, and will ignore all but the last duplicate field that the decoder encounters. This is the default behavior prior to v1.23. - Warn: This will send a warning via the standard warning response header for each unknown field that is dropped from the object, and for each duplicate field that is encountered. The request will still succeed if there are no other errors, and will only persist the last of any duplicate fields. This is the default in v1.23+ - Strict: This will fail the request with a BadRequest error if any unknown fields would be dropped from the object, or if any duplicate fields are present. The error returned from the server will contain all unknown and duplicate fields encountered.

Table 12. HTTP responses
HTTP code Reponse body

200 - OK

MachineSet schema

401 - Unauthorized

Empty

HTTP method

PUT

Description

replace the specified MachineSet

Table 13. Query parameters
Parameter Type Description

dryRun

string

When present, indicates that modifications should not be persisted. An invalid or unrecognized dryRun directive will result in an error response and no further processing of the request. Valid values are: - All: all dry run stages will be processed

fieldValidation

string

fieldValidation instructs the server on how to handle objects in the request (POST/PUT/PATCH) containing unknown or duplicate fields. Valid values are: - Ignore: This will ignore any unknown fields that are silently dropped from the object, and will ignore all but the last duplicate field that the decoder encounters. This is the default behavior prior to v1.23. - Warn: This will send a warning via the standard warning response header for each unknown field that is dropped from the object, and for each duplicate field that is encountered. The request will still succeed if there are no other errors, and will only persist the last of any duplicate fields. This is the default in v1.23+ - Strict: This will fail the request with a BadRequest error if any unknown fields would be dropped from the object, or if any duplicate fields are present. The error returned from the server will contain all unknown and duplicate fields encountered.

Table 14. Body parameters
Parameter Type Description

body

MachineSet schema

Table 15. HTTP responses
HTTP code Reponse body

200 - OK

MachineSet schema

201 - Created

MachineSet schema

401 - Unauthorized

Empty

/apis/cluster.x-k8s.io/v1beta1/namespaces/{namespace}/machinesets/{name}/scale

Table 16. Global path parameters
Parameter Type Description

name

string

name of the MachineSet

HTTP method

GET

Description

read scale of the specified MachineSet

Table 17. HTTP responses
HTTP code Reponse body

200 - OK

Scale schema

401 - Unauthorized

Empty

HTTP method

PATCH

Description

partially update scale of the specified MachineSet

Table 18. Query parameters
Parameter Type Description

dryRun

string

When present, indicates that modifications should not be persisted. An invalid or unrecognized dryRun directive will result in an error response and no further processing of the request. Valid values are: - All: all dry run stages will be processed

fieldValidation

string

fieldValidation instructs the server on how to handle objects in the request (POST/PUT/PATCH) containing unknown or duplicate fields. Valid values are: - Ignore: This will ignore any unknown fields that are silently dropped from the object, and will ignore all but the last duplicate field that the decoder encounters. This is the default behavior prior to v1.23. - Warn: This will send a warning via the standard warning response header for each unknown field that is dropped from the object, and for each duplicate field that is encountered. The request will still succeed if there are no other errors, and will only persist the last of any duplicate fields. This is the default in v1.23+ - Strict: This will fail the request with a BadRequest error if any unknown fields would be dropped from the object, or if any duplicate fields are present. The error returned from the server will contain all unknown and duplicate fields encountered.

Table 19. HTTP responses
HTTP code Reponse body

200 - OK

Scale schema

401 - Unauthorized

Empty

HTTP method

PUT

Description

replace scale of the specified MachineSet

Table 20. Query parameters
Parameter Type Description

dryRun

string

When present, indicates that modifications should not be persisted. An invalid or unrecognized dryRun directive will result in an error response and no further processing of the request. Valid values are: - All: all dry run stages will be processed

fieldValidation

string

fieldValidation instructs the server on how to handle objects in the request (POST/PUT/PATCH) containing unknown or duplicate fields. Valid values are: - Ignore: This will ignore any unknown fields that are silently dropped from the object, and will ignore all but the last duplicate field that the decoder encounters. This is the default behavior prior to v1.23. - Warn: This will send a warning via the standard warning response header for each unknown field that is dropped from the object, and for each duplicate field that is encountered. The request will still succeed if there are no other errors, and will only persist the last of any duplicate fields. This is the default in v1.23+ - Strict: This will fail the request with a BadRequest error if any unknown fields would be dropped from the object, or if any duplicate fields are present. The error returned from the server will contain all unknown and duplicate fields encountered.

Table 21. Body parameters
Parameter Type Description

body

Scale schema

Table 22. HTTP responses
HTTP code Reponse body

200 - OK

Scale schema

201 - Created

Scale schema

401 - Unauthorized

Empty

/apis/cluster.x-k8s.io/v1beta1/namespaces/{namespace}/machinesets/{name}/status

Table 23. Global path parameters
Parameter Type Description

name

string

name of the MachineSet

HTTP method

GET

Description

read status of the specified MachineSet

Table 24. HTTP responses
HTTP code Reponse body

200 - OK

MachineSet schema

401 - Unauthorized

Empty

HTTP method

PATCH

Description

partially update status of the specified MachineSet

Table 25. Query parameters
Parameter Type Description

dryRun

string

When present, indicates that modifications should not be persisted. An invalid or unrecognized dryRun directive will result in an error response and no further processing of the request. Valid values are: - All: all dry run stages will be processed

fieldValidation

string

fieldValidation instructs the server on how to handle objects in the request (POST/PUT/PATCH) containing unknown or duplicate fields. Valid values are: - Ignore: This will ignore any unknown fields that are silently dropped from the object, and will ignore all but the last duplicate field that the decoder encounters. This is the default behavior prior to v1.23. - Warn: This will send a warning via the standard warning response header for each unknown field that is dropped from the object, and for each duplicate field that is encountered. The request will still succeed if there are no other errors, and will only persist the last of any duplicate fields. This is the default in v1.23+ - Strict: This will fail the request with a BadRequest error if any unknown fields would be dropped from the object, or if any duplicate fields are present. The error returned from the server will contain all unknown and duplicate fields encountered.

Table 26. HTTP responses
HTTP code Reponse body

200 - OK

MachineSet schema

401 - Unauthorized

Empty

HTTP method

PUT

Description

replace status of the specified MachineSet

Table 27. Query parameters
Parameter Type Description

dryRun

string

When present, indicates that modifications should not be persisted. An invalid or unrecognized dryRun directive will result in an error response and no further processing of the request. Valid values are: - All: all dry run stages will be processed

fieldValidation

string

fieldValidation instructs the server on how to handle objects in the request (POST/PUT/PATCH) containing unknown or duplicate fields. Valid values are: - Ignore: This will ignore any unknown fields that are silently dropped from the object, and will ignore all but the last duplicate field that the decoder encounters. This is the default behavior prior to v1.23. - Warn: This will send a warning via the standard warning response header for each unknown field that is dropped from the object, and for each duplicate field that is encountered. The request will still succeed if there are no other errors, and will only persist the last of any duplicate fields. This is the default in v1.23+ - Strict: This will fail the request with a BadRequest error if any unknown fields would be dropped from the object, or if any duplicate fields are present. The error returned from the server will contain all unknown and duplicate fields encountered.

Table 28. Body parameters
Parameter Type Description

body

MachineSet schema

Table 29. HTTP responses
HTTP code Reponse body

200 - OK

MachineSet schema

201 - Created

MachineSet schema

401 - Unauthorized

Empty