/
log.go
57 lines (46 loc) · 1.2 KB
/
log.go
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package kubernetesrm
import (
"context"
"io"
"github.com/sirupsen/logrus"
"github.com/pkg/errors"
k8sV1 "k8s.io/api/core/v1"
typedV1 "k8s.io/client-go/kubernetes/typed/core/v1"
"github.com/determined-ai/determined/master/pkg/model"
)
type podLogStreamer struct {
callback func(log []byte)
}
func startPodLogStreamer(
podInterface typedV1.PodInterface,
podName string,
callback func(log []byte),
) error {
logs := podInterface.GetLogs(podName, &k8sV1.PodLogOptions{
Follow: true,
Timestamps: false,
Container: model.DeterminedK8ContainerName,
})
logReader, err := logs.Stream(context.TODO())
if err != nil {
return errors.Wrapf(err, "failed to initialize log stream for pod: %s", podName)
}
syslog := logrus.WithField("podName", podName)
logger := &podLogStreamer{callback}
go logger.receiveStreamLogs(syslog, logReader)
return nil
}
// Write implements the io.Writer interface.
func (p *podLogStreamer) Write(log []byte) (n int, err error) {
p.callback(log)
return len(log), nil
}
func (p *podLogStreamer) receiveStreamLogs(
syslog *logrus.Entry,
logReader io.ReadCloser,
) {
_, err := io.Copy(p, logReader)
if err != nil {
syslog.WithError(err).Debug("error reading logs")
}
}