feat 初次提交

discover/common/tool.go

@@ -0,0 +1,25 @@
+package common
+
+import (
+	"common/db/etcd"
+	"common/log"
+	clientv3 "go.etcd.io/etcd/client/v3"
+)
+
+// NewLeaseAndKeepAlive 创建租约并保活
+func NewLeaseAndKeepAlive(ttl int64) (clientv3.LeaseID, error) {
+	lease, err := etcd.GetClient().Grant(ttl)
+	if err != nil {
+		return 0, err
+	}
+	chKeepAlive, err := etcd.GetClient().KeepAlive(lease.ID)
+	if err != nil {
+		return 0, err
+	}
+	go func(leaseID clientv3.LeaseID) {
+		for range chKeepAlive {
+		}
+		log.Warnf("Lease %x expired or revoked", leaseID)
+	}(lease.ID)
+	return lease.ID, nil
+}