Dubbo-go has a built-in health check service based on the triple protocol to help users manage and monitor the health status of services. You can view the complete example source code here.
grpc.health.v1.Health into the framework after starting via instance, which records and exposes the health status of each triple service.grpc.health.v1.Health, and the method is check.Start the service in dubbo-go-samples/healthcheck/go-server, and the status of greet.GreetService can be viewed through the client below.
package main
import (
"context"
"dubbo.apache.org/dubbo-go/v3/client"
_ "dubbo.apache.org/dubbo-go/v3/imports"
health "dubbo.apache.org/dubbo-go/v3/protocol/triple/health/triple_health"
"github.com/dubbogo/gost/log/logger"
)
func main() {
cli, err := client.NewClient(
client.WithClientURL("tri://127.0.0.1:20000"),
)
if err != nil {
panic(err)
}
svc, err := health.NewHealth(cli)
if err != nil {
panic(err)
}
check, err := svc.Check(context.Background(), &health.HealthCheckRequest{Service: "greet.GreetService"})
if err != nil {
logger.Error(err)
} else {
logger.Info("greet.GreetService's health", check.String())
}
watch, err := svc.Watch(context.Background(), &health.HealthCheckRequest{Service: "greet.GreetService"})
if err != nil {
logger.Error(err)
} else {
if watch.Recv() {
logger.Info("greet.GreetService's health", watch.Msg().String())
}
}
}
Once started, the following output will appear
[greet.GreetService's health status:SERVING]
[greet.GreetService's health status:SERVING]
Start the service in dubbo-go-samples/healthcheck/go-server, and make the HTTP request below to view the status of greet.GreetService:
POST /grpc.health.v1.Health/Check
Host: 127.0.0.1:20000
Content-Type: application/json
{"service":"greet.GreetService"}
The following output will appear
{
"status": "SERVING"
}
It is worth noting that the current framework does not yet establish a complete service status management mechanism. The dubbo-go framework will set all loaded services to SERVING status, but there is currently no NOT SERVING setting mechanism (to set the service status to NOT SERVING under a specific condition).
If necessary, users can extend the dubbo-go framework to provide complete service status management capabilities, allowing for real-time updated service status queries and traffic forwarding based on service status.
Reference materials: