7dd49516d8
This makes the concept of a `Provider` wholely implemented in the cli implementation in cmd/virtual-kubelet. It allows us to slim down the interfaces used in vkubelet (and vkubelet/api) to what is actually used there rather than a huge interface that is only there to serve the CLI's needs.
81 lines
2.0 KiB
Go
81 lines
2.0 KiB
Go
package api
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import (
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"context"
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"io"
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"net/http"
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"strconv"
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"time"
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"github.com/cpuguy83/strongerrors"
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"github.com/gorilla/mux"
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"github.com/pkg/errors"
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"github.com/virtual-kubelet/virtual-kubelet/log"
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)
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// ContainerLogsHandlerFunc is used in place of backend implementations for getting container logs
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type ContainerLogsHandlerFunc func(ctx context.Context, namespace, podName, containerName string, opts ContainerLogOpts) (io.ReadCloser, error)
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// ContainerLogOpts are used to pass along options to be set on the container
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// log stream.
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type ContainerLogOpts struct {
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Tail int
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Since time.Duration
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LimitBytes int
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Timestamps bool
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}
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// HandleContainerLogs creates an http handler function from a provider to serve logs from a pod
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func HandleContainerLogs(h ContainerLogsHandlerFunc) http.HandlerFunc {
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if h == nil {
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return NotImplemented
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}
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return handleError(func(w http.ResponseWriter, req *http.Request) error {
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vars := mux.Vars(req)
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if len(vars) != 3 {
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return strongerrors.NotFound(errors.New("not found"))
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}
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ctx := req.Context()
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namespace := vars["namespace"]
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pod := vars["pod"]
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container := vars["container"]
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tail := 10
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q := req.URL.Query()
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if queryTail := q.Get("tailLines"); queryTail != "" {
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t, err := strconv.Atoi(queryTail)
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if err != nil {
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return strongerrors.InvalidArgument(errors.Wrap(err, "could not parse \"tailLines\""))
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}
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tail = t
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}
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// TODO(@cpuguy83): support v1.PodLogOptions
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// The kubelet decoding here is not straight forward, so this needs to be disected
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opts := ContainerLogOpts{
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Tail: tail,
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}
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logs, err := h(ctx, namespace, pod, container, opts)
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if err != nil {
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return errors.Wrap(err, "error getting container logs?)")
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}
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defer logs.Close()
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req.Header.Set("Transfer-Encoding", "chunked")
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if _, ok := w.(writeFlusher); !ok {
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log.G(ctx).Debug("http response writer does not support flushes")
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}
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if _, err := io.Copy(flushOnWrite(w), logs); err != nil {
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return strongerrors.Unknown(errors.Wrap(err, "error writing response to client"))
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}
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return nil
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})
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}
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