Fix unclear doc and add missing variable (#4484)

* Revert "[BugFix] Docker InfluxDB cannot be enabled (#4483)"

This reverts commit 73d0802c.

* Fix unclear doc and add missing variable

docker/oap-es7/docker-entrypoint.sh

@@ -302,7 +302,7 @@ generateApplicationYaml() {
 
     validateVariables "SW_CLUSTER" "$SW_CLUSTER" "standalone zookeeper kubernetes consul etcd nacos"
 
-    validateVariables "SW_STORAGE" "$SW_STORAGE" "elasticsearch h2 mysql"
+    validateVariables "SW_STORAGE" "$SW_STORAGE" "elasticsearch h2 mysql influxdb"
 
     validateVariables "SW_CONFIGURATION" "$SW_CONFIGURATION" "none apollo nacos zookeeper"
 

docker/oap/docker-entrypoint.sh

@@ -303,7 +303,7 @@ generateApplicationYaml() {
 
     validateVariables "SW_CLUSTER" "$SW_CLUSTER" "standalone zookeeper kubernetes consul etcd nacos"
 
-    validateVariables "SW_STORAGE" "$SW_STORAGE" "elasticsearch h2 mysql"
+    validateVariables "SW_STORAGE" "$SW_STORAGE" "elasticsearch h2 mysql influxdb"
 
     validateVariables "SW_CONFIGURATION" "$SW_CONFIGURATION" "none apollo nacos zookeeper"
 

docs/en/setup/backend/backend-storage.md

@@ -38,8 +38,6 @@ storage:
 
 For now, ElasticSearch 6 and ElasticSearch 7 share the same configurations, as follows:
 
-Setting fragment example
-
 ```yaml
 storage:
   elasticsearch:
@@ -70,6 +68,9 @@ storage:
     advanced: ${SW_STORAGE_ES_ADVANCED:""}
 ```
 
+In order to use ElasticSearch 7, comment/remove the section `storage/elasticsearch` and find the corresponding config section(`storage/elasticsearch7`),
+uncomment to enable it.
+
 ### Downsampling Data Packing
 
 Downsampling data packing(`storage/elasticsearch/enablePackedDownsampling`, default activated) is a new feature since 7.0.0.