rewrite initial cluster nodes discovering

tasks/pre_check.yaml

@@ -4,33 +4,39 @@
       cluster_node_list: []
 
   - name: Get cluster nodes
-    command: curl http://127.0.0.1:8500/v1/status/peers
-    environment:
-      no_proxy: 127.0.0.1
+    ansible.builtin.uri:
+      url: http://127.0.0.1:8500/v1/status/peers
+      method: GET
+      status_code: 200
+      body_format: json
+      return_content: true
     register: cluster_nodes
-    changed_when: false
-    no_log: true
+    failed_when: false
 
   - name: Print cluster nodes
     debug:
-      msg: "{{ cluster_nodes.stdout }}"
+      msg: "{{ cluster_nodes.json }}"
       verbosity: 2
+    when: cluster_nodes.json is defined
 
   - name: Print cluster nodes
     debug:
       msg: "{{ item }}"
       verbosity: 2
-    loop: "{{ cluster_nodes.stdout | from_json }}"
+    loop: "{{ cluster_nodes.json }}"
+    when: cluster_nodes.json is defined
 
   - name: Merge cluster nodes list
     set_fact:
       cluster_node_list: "{{ cluster_node_list + [item|split(':')|first] }}"
-    loop: "{{ cluster_nodes.stdout | from_json }}"
+    loop: "{{ cluster_nodes.json }}"
+    when: cluster_nodes.json is defined
 
   - name: Print cluster nodes list
     debug:
       msg: "{{ cluster_node_list }}"
       verbosity: 2
+    when: cluster_nodes.json is defined
 
   run_once: true
-  ignore_errors: yes
+  ignore_errors: true