/
heartbeat.go
67 lines (54 loc) · 1.36 KB
/
heartbeat.go
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package gcp
import (
"context"
"io/ioutil"
"net/http"
"strings"
"github.com/pkg/errors"
am "k8s.io/apimachinery/pkg/apis/meta/v1"
)
func (p *Provider) Heartbeat() (map[string]interface{}, error) {
req, err := http.NewRequest("GET", "http://metadata.google.internal/computeMetadata/v1/instance/machine-type", nil)
if err != nil {
return nil, err
}
req.Header.Add("Metadata-Flavor", "Google")
res, err := http.DefaultClient.Do(req)
if err != nil {
return nil, err
}
defer res.Body.Close()
data, err := ioutil.ReadAll(res.Body)
if err != nil {
return nil, err
}
tparts := strings.Split(strings.TrimSpace(string(data)), "/")
onDemandCnt, spotCnt, err := p.getInstanceTypeWiseCnt()
if err != nil {
return nil, err
}
hs := map[string]interface{}{
"instance_type": tparts[len(tparts)-1],
"region": p.Region,
"on_demand_instance_count": onDemandCnt,
"spot_instance_count": spotCnt,
}
return hs, nil
}
func (p *Provider) getInstanceTypeWiseCnt() (int, int, error) {
ns, err := p.Cluster.CoreV1().Nodes().List(context.TODO(), am.ListOptions{})
if err != nil {
return 0, 0, errors.WithStack(err)
}
spotCnt := 0
onDemandCnt := 0
for i := range ns.Items {
switch ns.Items[i].Labels["cloud.google.com/gke-spot"] {
case "true":
spotCnt++
default:
onDemandCnt++
}
}
return onDemandCnt, spotCnt, nil
}