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heartbeat.go
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heartbeat.go
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package util
import (
"context"
"fmt"
"github.com/alibaba/kt-connect/pkg/common"
"github.com/rs/zerolog/log"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/apimachinery/pkg/types"
coreV1 "k8s.io/client-go/kubernetes/typed/core/v1"
"net"
"time"
)
const ResourceHeartBeatIntervalMinus = 5
const portForwardHeartBeatIntervalSec = 30
// SetupPodHeartBeat setup heartbeat watcher for deployment
func SetupPodHeartBeat(ctx context.Context, client coreV1.PodInterface, name string) {
ticker := time.NewTicker(time.Minute * ResourceHeartBeatIntervalMinus)
go func() {
for range ticker.C {
log.Debug().Msgf("Heartbeat deployment %s ticked at %s", name, formattedTime())
_, err := client.Patch(ctx, name, types.JSONPatchType, []byte(resourceHeartbeatPatch()), metav1.PatchOptions{})
if err != nil {
log.Error().Msg(err.Error())
return
}
}
}()
}
// SetupServiceHeartBeat setup heartbeat watcher for service
func SetupServiceHeartBeat(ctx context.Context, client coreV1.ServiceInterface, name string) {
ticker := time.NewTicker(time.Minute * ResourceHeartBeatIntervalMinus)
go func() {
for range ticker.C {
log.Debug().Msgf("Heartbeat service %s ticked at %s", name, formattedTime())
_, err := client.Patch(ctx, name, types.JSONPatchType, []byte(resourceHeartbeatPatch()), metav1.PatchOptions{})
if err != nil {
log.Error().Msg(err.Error())
return
}
}
}()
}
// SetupConfigMapHeartBeat setup heartbeat watcher for config map
func SetupConfigMapHeartBeat(ctx context.Context, client coreV1.ConfigMapInterface, name string) {
ticker := time.NewTicker(time.Minute * ResourceHeartBeatIntervalMinus)
go func() {
for range ticker.C {
log.Debug().Msgf("Heartbeat configmap %s ticked at %s", name, formattedTime())
_, err := client.Patch(ctx, name, types.JSONPatchType, []byte(resourceHeartbeatPatch()), metav1.PatchOptions{})
if err != nil {
log.Error().Msg(err.Error())
return
}
}
}()
}
// SetupPortForwardHeartBeat setup heartbeat watcher for port forward
func SetupPortForwardHeartBeat(port int) {
ticker := time.NewTicker(time.Second * portForwardHeartBeatIntervalSec)
go func() {
for range ticker.C {
conn, err := net.Dial("tcp", fmt.Sprintf(":%d", port))
if err == nil {
log.Debug().Msgf("Heartbeat port forward %d ticked at %s", port, formattedTime())
_ = conn.Close()
} else {
log.Debug().Msgf("Heartbeat port forward %d ticked failed %s", port, err)
}
}
}()
}
func formattedTime() string {
return time.Now().Format(common.YyyyMmDdHhMmSs)
}
func resourceHeartbeatPatch() string {
return fmt.Sprintf("[ { \"op\" : \"replace\" , \"path\" : \"/metadata/annotations/%s\" , \"value\" : \"%s\" } ]",
common.KTLastHeartBeat, GetTimestamp())
}