step work for prometheus

defaults/main.yml

 ---
 
+domain_name: "{{ansible_fqdn|replace((ansible_hostname + '.'),'')}}"

tasks/main.yml

@@ -3,3 +3,16 @@
 - import_tasks: all.yml
 
 - include_tasks: "{{ansible_os_family|lower}}.yml"
+
+- name: client certificates
+  import_role:
+    name: step_client
+  vars:
+    step_client_user: prometheus
+    step_client_dir: '/etc/ssl/prometheus_client'
+    step_services:
+      - 'prometheus'
+    step_extkey_usage: ["clientAuth"]
+    step_cn: "prometheus.{{domain_name}}"
+    dns_names: ['{{ansible_fqdn}}', 'prometheus.{{domain_name}}']
+  tags: step