fix(docker): Improve the fallback mechanism implementation.

Author: gounthar

dockerfiles/agent-discovery/find-name.sh

@@ -81,9 +81,10 @@ done
 
 # Check if jenkins_controller is reachable, otherwise fall back to multi_jenkins_controller
 JENKINS_CONTROLLER="jenkins_controller"
-if ! curl -s -f http://jenkins_controller:8080/login > /dev/null; then
-    JENKINS_CONTROLLER="multi_jenkins_controller"
-fi
+if ! curl -s -f "http://${JENKINS_CONTROLLER}:8080/login" > /dev/null; then
+    echo "Primary controller not reachable, falling back to multi controller..."
+     JENKINS_CONTROLLER="multi_jenkins_controller"
+ fi
 
 # Check If Jenkins is running or not
 # If the message is found, awk exits with a non-zero status (1), and the loop continues.