da5e24ef4d
This makes the package split a little cleaner and easier to import the HTTP handlers for other consumers.
40 lines
1.1 KiB
Go
40 lines
1.1 KiB
Go
package api
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import (
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"context"
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"encoding/json"
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"net/http"
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"github.com/cpuguy83/strongerrors"
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"github.com/pkg/errors"
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stats "k8s.io/kubernetes/pkg/kubelet/apis/stats/v1alpha1"
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)
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// PodMetricsBackend is used in place of backend implementations to get k8s pod metrics.
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type PodMetricsBackend interface {
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GetStatsSummary(context.Context) (*stats.Summary, error)
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}
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// PodMetricsHandlerFunc makes an HTTP handler for implementing the kubelet summary stats endpoint
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func PodMetricsHandlerFunc(b PodMetricsBackend) http.HandlerFunc {
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return handleError(func(w http.ResponseWriter, req *http.Request) error {
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stats, err := b.GetStatsSummary(req.Context())
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if err != nil {
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if errors.Cause(err) == context.Canceled {
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return strongerrors.Cancelled(err)
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}
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return errors.Wrap(err, "error getting status from provider")
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}
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b, err := json.Marshal(stats)
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if err != nil {
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return strongerrors.Unknown(errors.Wrap(err, "error marshalling stats"))
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}
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if _, err := w.Write(b); err != nil {
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return strongerrors.Unknown(errors.Wrap(err, "could not write to client"))
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}
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return nil
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})
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}
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