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allocation-api.md

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Kubecost exposes multiple APIs to obtain cost, resource allocation, and utilization data. Below is documentation on two options: the cost model API and aggregated cost model API.

Cost model API

The full cost model API exposes pricing model inputs at the individual container/workload level and is available at:

http://<kubecost-address>/model/costDataModel

Here's an example use:

http://localhost:9090/model/costDataModel?timeWindow=7d&offset=7d

API parameters include the following:

  • timeWindow dictates the applicable window for measuring cost metrics. Supported units are d, h, and m.
  • offset shifts timeWindow backwards relative to the current time. Supported units are d, h, and m.

This API returns a set of JSON elements in this format:

{
  cpuallocated: [{timestamp: 1567531940, value: 0.01}]
  cpureq: [{timestamp: 1567531940, value: 0.01}]
  cpuused: [{timestamp: 1567531940, value: 0.006}]
  deployments: ["cost-model"]
  gpureq: [{timestamp: 0, value: 0}]
  labels: {app: "cost-model", pod-template-hash: "1576869057"}
  name: "cost-model"
  namespace: "cost-model"
  node: {hourlyCost: "", CPU: "2", CPUHourlyCost: "0.031611", RAM: "13335256Ki",…}
  nodeName: "gke-kc-demo-highmem-pool-b1faa4fc-fs6g"
  podName: "cost-model-59cbdbf49c-rbr2t"
  pvcData: [{class: "standard", claim: "kubecost-model", namespace: "kubecost",…}]
  ramallocated: [{timestamp: 1567531940, value: 55000000}]
  ramreq: [{timestamp: 1567531940, value: 55000000}]
  ramused: [{timestamp: 1567531940, value: 19463457.32}]
  services: ["cost-model"]
}


Optional request parameters include the following:

Field Description
filterFields Blacklist of fields to be filtered from response. For example, appending &filterFields=cpuused,cpureq,ramreq,ramused will remove request and usage data.
namespace Filter results by namespace. For example, appending &namespace=kubecost only returns data for the kubecost namespace

Aggregated cost model API

The aggregated cost model API retrieves data similiar to the Kubecost Allocation frontend view and is available at:

http://<kubecost-address>/model/aggregatedCostModel

Here are example uses:

  • http://localhost:9090/model/aggregatedCostModel?window=1d&aggregation=namespace
  • http://localhost:9090/model/aggregatedCostModel?window=1d&aggregation=label&aggregationSubfield=product
  • http://localhost:9090/model/aggregatedCostModel?window=1d&aggregation=namespace&sharedNamespaces=kube-system

API parameters include the following:

  • window dictates the applicable window for measuring cost metrics. Supported units are d, h, m, and s.
  • offset (optional) shifts window backwards from current time. Supported units are d, h, m, and s.
  • aggregation is the field used to consolidate cost model data. Supported types are cluster, namespace, deployment, service, and label.
  • aggregationSubfield used for aggregation types that require sub fields, e.g. aggregation type equals label and the value of the label (aggregationSubfield) equals app.
  • allocateIdle (optional) when set to true applies the cost of all idle compute resources to tenants, default false.
  • sharedNamespaces (optional) provide a comma separated list of namespaces (e.g. kube-system) to be allocated to other tenants. These resources are evenly allocated to other tenants as sharedCost.
  • sharedLabelNames (optional) provide a comma separated list of kubernetes labels (e.g. app) to be allocated to other tenants. Must provide corresponding set of label values in sharedLabelValues.
  • sharedLabelValues (optional) label value (e.g. prometheus) associated with sharedLabelNames parameter.
  • disableCache this API caches recently fetched data by default. Set this variable to false to avoid cache entirely.

This API returns a set of JSON objects in this format:

{
  aggregation: "namespace"
  subfields: ""             // value(s) of aggregationSubfield parameter
  cluster: "cluster-1"
  cpuCost: 100.031611       
  environment: "default"    // value of aggregation field
  gpuCost: 0
  networkCost: 0
  pvCost: 10.000000
  ramCost: 70.000529625
  sharedCost: 0             // value of costs allocated via sharedNamespaces or sharedLabelNames
  totalCost: 180.032140625
}

Have questions? Email us at [email protected].