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Merge pull request #44899 from smarterclayton/burst

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Automatic merge from submit-queue (batch tested with PRs 38990, 45781, 46225, 44899, 43663)

Support parallel scaling on StatefulSets

Fixes #41255

```release-note
StatefulSets now include an alpha scaling feature accessible by setting the `spec.podManagementPolicy` field to `Parallel`.  The controller will not wait for pods to be ready before adding the other pods, and will replace deleted pods as needed.  Since parallel scaling creates pods out of order, you cannot depend on predictable membership changes within your set.
```
This commit is contained in:
Kubernetes Submit Queue
2017-05-22 19:07:09 -07:00
committed by GitHub
parent a31fda9950 e40648de68
commit c2c5051adf
34 changed files with 1162 additions and 651 deletions
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18
api/openapi-spec/swagger.json
View File

@@ -47458,25 +47458,29 @@
"serviceName"
],
"properties": {
"podManagementPolicy": {
"description": "podManagementPolicy controls how pods are created during initial scale up, when replacing pods on nodes, or when scaling down. The default policy is `OrderedReady`, where pods are created in increasing order (pod-0, then pod-1, etc) and the controller will wait until each pod is ready before continuing. When scaling down, the pods are removed in the opposite order. The alternative policy is `Parallel` which will create pods in parallel to match the desired scale without waiting, and on scale down will delete all pods at once.",
"type": "string"
},
"replicas": {
"description": "Replicas is the desired number of replicas of the given Template. These are replicas in the sense that they are instantiations of the same Template, but individual replicas also have a consistent identity. If unspecified, defaults to 1.",
"description": "replicas is the desired number of replicas of the given Template. These are replicas in the sense that they are instantiations of the same Template, but individual replicas also have a consistent identity. If unspecified, defaults to 1.",
"type": "integer",
"format": "int32"
},
"selector": {
"description": "Selector is a label query over pods that should match the replica count. If empty, defaulted to labels on the pod template. More info: https://kubernetes.io/docs/concepts/overview/working-with-objects/labels/#label-selectors",
"description": "selector is a label query over pods that should match the replica count. If empty, defaulted to labels on the pod template. More info: https://kubernetes.io/docs/concepts/overview/working-with-objects/labels/#label-selectors",
"$ref": "#/definitions/io.k8s.apimachinery.pkg.apis.meta.v1.LabelSelector"
},
"serviceName": {
"description": "ServiceName is the name of the service that governs this StatefulSet. This service must exist before the StatefulSet, and is responsible for the network identity of the set. Pods get DNS/hostnames that follow the pattern: pod-specific-string.serviceName.default.svc.cluster.local where \"pod-specific-string\" is managed by the StatefulSet controller.",
"description": "serviceName is the name of the service that governs this StatefulSet. This service must exist before the StatefulSet, and is responsible for the network identity of the set. Pods get DNS/hostnames that follow the pattern: pod-specific-string.serviceName.default.svc.cluster.local where \"pod-specific-string\" is managed by the StatefulSet controller.",
"type": "string"
},
"template": {
"description": "Template is the object that describes the pod that will be created if insufficient replicas are detected. Each pod stamped out by the StatefulSet will fulfill this Template, but have a unique identity from the rest of the StatefulSet.",
"description": "template is the object that describes the pod that will be created if insufficient replicas are detected. Each pod stamped out by the StatefulSet will fulfill this Template, but have a unique identity from the rest of the StatefulSet.",
"$ref": "#/definitions/io.k8s.kubernetes.pkg.api.v1.PodTemplateSpec"
},
"volumeClaimTemplates": {
"description": "VolumeClaimTemplates is a list of claims that pods are allowed to reference. The StatefulSet controller is responsible for mapping network identities to claims in a way that maintains the identity of a pod. Every claim in this list must have at least one matching (by name) volumeMount in one container in the template. A claim in this list takes precedence over any volumes in the template, with the same name.",
"description": "volumeClaimTemplates is a list of claims that pods are allowed to reference. The StatefulSet controller is responsible for mapping network identities to claims in a way that maintains the identity of a pod. Every claim in this list must have at least one matching (by name) volumeMount in one container in the template. A claim in this list takes precedence over any volumes in the template, with the same name.",
"type": "array",
"items": {
"$ref": "#/definitions/io.k8s.kubernetes.pkg.api.v1.PersistentVolumeClaim"
@@ -47491,12 +47495,12 @@
],
"properties": {
"observedGeneration": {
"description": "most recent generation observed by this StatefulSet.",
"description": "observedGeneration is the most recent generation observed by this StatefulSet.",
"type": "integer",
"format": "int64"
},
"replicas": {
"description": "Replicas is the number of actual replicas.",
"description": "replicas is the number of actual replicas.",
"type": "integer",
"format": "int32"
}

18
api/swagger-spec/apps_v1beta1.json
View File

@@ -4955,26 +4955,30 @@
"replicas": {
"type": "integer",
"format": "int32",
"description": "Replicas is the desired number of replicas of the given Template. These are replicas in the sense that they are instantiations of the same Template, but individual replicas also have a consistent identity. If unspecified, defaults to 1."
"description": "replicas is the desired number of replicas of the given Template. These are replicas in the sense that they are instantiations of the same Template, but individual replicas also have a consistent identity. If unspecified, defaults to 1."
},
"selector": {
"$ref": "v1.LabelSelector",
"description": "Selector is a label query over pods that should match the replica count. If empty, defaulted to labels on the pod template. More info: https://kubernetes.io/docs/concepts/overview/working-with-objects/labels/#label-selectors"
"description": "selector is a label query over pods that should match the replica count. If empty, defaulted to labels on the pod template. More info: https://kubernetes.io/docs/concepts/overview/working-with-objects/labels/#label-selectors"
},
"template": {
"$ref": "v1.PodTemplateSpec",
"description": "Template is the object that describes the pod that will be created if insufficient replicas are detected. Each pod stamped out by the StatefulSet will fulfill this Template, but have a unique identity from the rest of the StatefulSet."
"description": "template is the object that describes the pod that will be created if insufficient replicas are detected. Each pod stamped out by the StatefulSet will fulfill this Template, but have a unique identity from the rest of the StatefulSet."
},
"volumeClaimTemplates": {
"type": "array",
"items": {
"$ref": "v1.PersistentVolumeClaim"
},
"description": "VolumeClaimTemplates is a list of claims that pods are allowed to reference. The StatefulSet controller is responsible for mapping network identities to claims in a way that maintains the identity of a pod. Every claim in this list must have at least one matching (by name) volumeMount in one container in the template. A claim in this list takes precedence over any volumes in the template, with the same name."
"description": "volumeClaimTemplates is a list of claims that pods are allowed to reference. The StatefulSet controller is responsible for mapping network identities to claims in a way that maintains the identity of a pod. Every claim in this list must have at least one matching (by name) volumeMount in one container in the template. A claim in this list takes precedence over any volumes in the template, with the same name."
},
"serviceName": {
"type": "string",
"description": "ServiceName is the name of the service that governs this StatefulSet. This service must exist before the StatefulSet, and is responsible for the network identity of the set. Pods get DNS/hostnames that follow the pattern: pod-specific-string.serviceName.default.svc.cluster.local where \"pod-specific-string\" is managed by the StatefulSet controller."
"description": "serviceName is the name of the service that governs this StatefulSet. This service must exist before the StatefulSet, and is responsible for the network identity of the set. Pods get DNS/hostnames that follow the pattern: pod-specific-string.serviceName.default.svc.cluster.local where \"pod-specific-string\" is managed by the StatefulSet controller."
},
"podManagementPolicy": {
"type": "string",
"description": "podManagementPolicy controls how pods are created during initial scale up, when replacing pods on nodes, or when scaling down. The default policy is `OrderedReady`, where pods are created in increasing order (pod-0, then pod-1, etc) and the controller will wait until each pod is ready before continuing. When scaling down, the pods are removed in the opposite order. The alternative policy is `Parallel` which will create pods in parallel to match the desired scale without waiting, and on scale down will delete all pods at once."
}
}
},
@@ -5068,12 +5072,12 @@
"observedGeneration": {
"type": "integer",
"format": "int64",
"description": "most recent generation observed by this StatefulSet."
"description": "observedGeneration is the most recent generation observed by this StatefulSet."
},
"replicas": {
"type": "integer",
"format": "int32",
"description": "Replicas is the number of actual replicas."
"description": "replicas is the number of actual replicas."
}
}
},