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Support burst in stateful set scale up and down

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The alpha field podManagementPolicy defines how pods are created,
deleted, and replaced. The new `Parallel` policy will replace pods
as fast as possible, not waiting for the pod to be `Ready` or providing
an order. This allows for advanced clustered software to take advantage
of rapid changes in scale.
This commit is contained in:
Clayton Coleman
2017-04-25 00:39:32 -04:00
parent 95ce463e95
commit 2861ae5eb9
30 changed files with 889 additions and 416 deletions
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18
api/openapi-spec/swagger.json
View File

@@ -47442,25 +47442,29 @@
"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"
@@ -47475,12 +47479,12 @@
],
"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."
}
}
},