add elasticsearch version check

env_check.go

@@ -0,0 +1,88 @@
+/* Copyright © INFINI Ltd. All rights reserved.
+ * web: https://infinilabs.com
+ * mail: hello#infini.ltd */
+
+package main
+
+import (
+	"fmt"
+	"github.com/buger/jsonparser"
+	log "github.com/cihub/seelog"
+	"infini.sh/console/config"
+	"infini.sh/framework/core/elastic"
+	"infini.sh/framework/core/env"
+	"infini.sh/framework/core/util"
+	"io/ioutil"
+	"net/http"
+)
+
+func bootstrapRequirementCheck() error{
+	err := checkElasticsearchRequire()
+	if err != nil {
+		return err
+	}
+	return nil
+}
+
+
+func checkElasticsearchRequire() error{
+	log.Trace("start to check elasticsearch requirement")
+	var esConfigs = []elastic.ElasticsearchConfig{}
+	ok, err := env.ParseConfig("elasticsearch", &esConfigs)
+	if err != nil {
+		return fmt.Errorf("parse elasticsearch config section error: %v", err)
+	}
+	if !ok {
+		return fmt.Errorf("elasticsearch config section not found")
+	}
+	appConfig = &config.AppConfig{
+		Elasticsearch: "default",
+	}
+	ok, err = env.ParseConfig("web", appConfig)
+	if err != nil {
+		return fmt.Errorf("parse web config section error: %v", err)
+	}
+	if !ok {
+		return fmt.Errorf("web config section not found")
+	}
+	if  appConfig.Elasticsearch == "" {
+		return fmt.Errorf("elasticsearch config of web section can not be empty")
+	}
+	var targetEsConfig *elastic.ElasticsearchConfig
+	for _, esConfig := range esConfigs {
+		if esConfig.Name == appConfig.Elasticsearch {
+			targetEsConfig = &esConfig
+		}
+	}
+	if targetEsConfig == nil {
+		return fmt.Errorf("elasticsearch config named %s not found", appConfig.Elasticsearch)
+	}
+	req, err := http.NewRequest(http.MethodGet, targetEsConfig.Endpoint, nil)
+	if err != nil {
+		return fmt.Errorf("new request error: %v", err)
+	}
+	if targetEsConfig.BasicAuth != nil {
+		req.SetBasicAuth(targetEsConfig.BasicAuth.Username, targetEsConfig.BasicAuth.Password)
+	}
+	res, err := http.DefaultClient.Do(req)
+	if err != nil {
+		return fmt.Errorf("check elasticsearch requirement error: %v", err)
+	}
+	defer res.Body.Close()
+	resBytes, err := ioutil.ReadAll(res.Body)
+	if err != nil {
+		return fmt.Errorf("check elasticsearch requirement error: %v", err)
+	}
+	versionNumber, err := jsonparser.GetString(resBytes, "version", "number")
+	if err != nil {
+		return fmt.Errorf("check elasticsearch requirement error: %v", err)
+	}
+	cr, err := util.VersionCompare(versionNumber, "7.3")
+	if  err !=nil {
+		return fmt.Errorf("check elasticsearch requirement error: %v", err)
+	}
+	if cr == -1 {
+		return fmt.Errorf("elasticsearch cluster version of store data required to be version 7.0 and above, but got %s", versionNumber)
+	}
+	return nil
+}

main.go

@@ -57,6 +57,11 @@ func main() {
 	api := api2.GatewayAPI{}
 
 	if app.Setup(func() {
+		err := bootstrapRequirementCheck()
+		if err !=nil{
+			panic(err)
+		}
+
 
 		//load core modules first
 		module.RegisterSystemModule(&elastic2.ElasticModule{})

plugin/api/gateway/instance.go

@@ -229,7 +229,12 @@ func (h *GatewayAPI) getInstanceStatus(w http.ResponseWriter, req *http.Request,
 			continue
 		}
 		var resMap = util.MapStr{}
-		util.MustFromJSONBytes(res.Body, &resMap)
+		err = util.FromJSONBytes(res.Body, &resMap)
+		if err != nil {
+			result[gid.(string)] = util.MapStr{}
+			log.Error(err)
+			continue
+		}
 
 		result[gid.(string)] = resMap
 	}