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worker.go
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worker.go
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package kube
import (
"bytes"
"context"
"fmt"
"io"
"math"
v1 "k8s.io/api/core/v1"
meta "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/apimachinery/pkg/labels"
"github.com/brigadecore/brigade/pkg/brigade"
)
// GetWorker returns the worker description.
//
// This will return an error if no worker is found for the build, which can
// happen when a build is scheduled, but not yet started.
func (s *store) GetWorker(buildID string) (*brigade.Worker, error) {
labels := labels.Set{"heritage": "brigade", "component": "build", "build": buildID}
listOption := meta.ListOptions{LabelSelector: labels.AsSelector().String()}
pods, err := s.client.CoreV1().Pods(s.namespace).List(context.TODO(), listOption)
if err != nil {
return nil, err
}
if len(pods.Items) < 1 {
return nil, fmt.Errorf("could not find worker for build %s: no pod exists with label %s", buildID, labels.AsSelector().String())
}
return NewWorkerFromPod(pods.Items[0]), nil
}
// NewWorkerFromPod creates a new *Worker from a pod definition.
func NewWorkerFromPod(pod v1.Pod) *brigade.Worker {
l := pod.Labels
worker := &brigade.Worker{
ID: pod.Name,
BuildID: l["build"],
ProjectID: l["project"],
Status: brigade.JobStatus(pod.Status.Phase),
}
if (worker.Status != brigade.JobPending) && (worker.Status != brigade.JobUnknown) {
worker.StartTime = pod.Status.StartTime.Time
}
if len(pod.Status.ContainerStatuses) > 0 {
cs := pod.Status.ContainerStatuses[0]
if cs.State.Terminated != nil {
worker.EndTime = cs.State.Terminated.FinishedAt.Time
worker.ExitCode = cs.State.Terminated.ExitCode
}
}
return worker
}
func (s *store) GetWorkerLogStream(worker *brigade.Worker) (io.ReadCloser, error) {
return s.getWorkerLogStream(false, worker)
}
func (s *store) GetWorkerLogStreamFollow(worker *brigade.Worker) (io.ReadCloser, error) {
return s.getWorkerLogStream(true, worker)
}
func (s *store) GetWorkerLog(worker *brigade.Worker) (string, error) {
buf := new(bytes.Buffer)
r, err := s.GetWorkerLogStream(worker)
if err != nil {
return "", err
}
defer r.Close()
io.Copy(buf, r)
return buf.String(), nil
}
func (s *store) GetWorkerInitLog(worker *brigade.Worker) (string, error) {
buf := new(bytes.Buffer)
r, err := s.getWorkerLogStream(false, worker, "vcs-sidecar")
if err != nil {
return "", err
}
defer r.Close()
io.Copy(buf, r)
return buf.String(), nil
}
func (s *store) getWorkerLogStream(follow bool, worker *brigade.Worker, container ...string) (io.ReadCloser, error) {
tailAllLines := int64(math.MaxInt64)
opts := &v1.PodLogOptions{
Follow: follow,
TailLines: &tailAllLines,
}
if len(container) > 0 {
opts.Container = container[0]
}
req := s.client.CoreV1().Pods(s.namespace).GetLogs(worker.ID, opts)
readCloser, err := req.Stream(context.TODO())
if err != nil {
return nil, err
}
return readCloser, nil
}