fix: init cluster health default status to green avoid nil panic (#81)

* fix: init cluster health default status to green avoid  nil panic

* docs: add release notes

Author: luohf-infinilabs

core/elastic/actions.go

@@ -126,6 +126,9 @@ func (meta *ElasticsearchMetadata) IsAvailable() bool {
 
 func (meta *ElasticsearchMetadata) Init(health bool) {
 	meta.clusterAvailable = health
+	if health && meta.Health == nil {
+		meta.Health = &ClusterHealth{Status: "green"}
+	}
 	meta.clusterFailureTicket = 0
 }
 

docs/content.en/docs/release-notes/_index.md

@@ -17,6 +17,7 @@ Information about release notes of INFINI Framework is provided here.
 - Fixed `[]byte` operator when queue comsumer paic (#77)
 - Fix incorrect interval configuration in index stats collection task (#80)
 - Fixed reload file need use privious pos (#79)
+- Fixed nil panic by init cluster health default status to green (#81) 
 
 
 ### Improvements