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supervisor: implement monitoring

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Signed-off-by: Kenfe-Mickael Laventure <mickael.laventure@gmail.com>
This commit is contained in:
Kenfe-Mickael Laventure 2017-02-06 14:57:43 -08:00
parent 31f26fed18
commit 78d7e8b256
13 changed files with 1311 additions and 276 deletions
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40
events/nats.go
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@ -2,30 +2,48 @@ package events
import (
"context"
"strings"
"encoding/json"
"time"
"github.com/Sirupsen/logrus"
"github.com/docker/containerd/log"
nats "github.com/nats-io/go-nats"
"github.com/nats-io/go-nats-streaming"
"github.com/pkg/errors"
)
type natsPoster struct {
nec *nats.EncodedConn
sc stan.Conn
}
func GetNATSPoster(nec *nats.EncodedConn) Poster {
return &natsPoster{nec}
func NewNATSPoster(clusterID, clientID string) (Poster, error) {
sc, err := stan.Connect(clusterID, clientID, stan.ConnectWait(5*time.Second))
if err != nil {
return nil, errors.Wrap(err, "failed to connect to nats streaming server")
}
return &natsPoster{sc}, nil
}
func (p *natsPoster) Post(ctx context.Context, e Event) {
subject := strings.Replace(log.GetModulePath(ctx), "/", ".", -1)
topic := getTopic(ctx)
if topic != "" {
subject = strings.Join([]string{subject, topic}, ".")
if topic == "" {
log.G(ctx).WithField("event", e).Warn("unable to post event, topic is empty")
return
}
if subject == "" {
log.GetLogger(ctx).WithField("event", e).Warn("unable to post event, subject is empty")
data, err := json.Marshal(e)
if err != nil {
log.G(ctx).WithError(err).WithFields(logrus.Fields{"event": e, "topic": topic}).
Warn("unable to marshal event")
return
}
p.nec.Publish(subject, e)
err = p.sc.Publish(topic, data)
if err != nil {
log.G(ctx).WithError(err).WithFields(logrus.Fields{"event": e, "topic": topic}).
Warn("unable to post event")
}
log.G(ctx).WithFields(logrus.Fields{"event": e, "topic": topic}).
Debug("Posted event")
}