Add TLS request for healthcheck (#4740)

buildscripts/healthcheck.sh

@@ -16,17 +16,28 @@
 #
 
 _init () {
-    address="http://127.0.0.1:9000"
+    scheme="http://"
+    address="127.0.0.1:9000"
     resource="/minio/index.html"
 }
 
 HealthCheckMain () {
     # Get the http response code
-    http_response=$(curl -s -o /dev/null -I -w "%{http_code}" ${address}${resource})
+    http_response=$(curl -s -k -o /dev/null -I -w "%{http_code}" ${scheme}${address}${resource})
+
+    # Get the http response body
+    http_response_body=$(curl -k -s ${scheme}${address}${resource})
+
+    # server returns response 403 and body "SSL required" if non-TLS connection is attempted on a TLS-configured server. 
+    # change the scheme and try again
+    if [ "$http_response" = "403" ] && [ "$http_response_body" = "SSL required" ]; then
+        scheme="https://"
+        http_response=$(curl -s -k -o /dev/null -I -w "%{http_code}" ${scheme}${address}${resource})
+    fi
 
     # If http_repsonse is 200 - server is up. 
     # When MINIO_BROWSER is set to off, curl responds with 404. We assume that the the server is up
-    [ "$http_response" == "200" ] || [ "$http_response" == "404" ]
+    [ "$http_response" = "200" ] || [ "$http_response" = "404" ]
 }
 
 _init && HealthCheckMain