Vault role updates:

* using separated vault roles for generate certs with different `O` (Organization) subject field;
  * configure vault roles for issuing certificates with different `CN` (Common name) subject field;
  * set `CN` and `O` to `kubernetes` and `etcd` certificates;
  * vault/defaults vars definition was simplified;
  * vault dirs variables defined in kubernetes-defaults foles for using
  shared tasks in etcd and kubernetes/secrets roles;
  * upgrade vault to 0.8.1;
  * generate random vault user password for each role by default;
  * fix `serial` file name for vault certs;
  * move vault auth request to issue_cert tasks;
  * enable `RBAC` in vault CI;

roles/vault/tasks/bootstrap/gen_vault_certs.yml

@@ -1,29 +1,21 @@
 ---
-
-- name: boostrap/gen_vault_certs | Add the vault role
-  uri:
-    url: "{{ vault_leader_url }}/v1/{{ vault_ca_options.common_name }}/roles/vault"
-    headers: "{{ vault_headers }}"
-    method: POST
-    body_format: json
-    body: "{{ vault_default_role_permissions }}"
-    status_code: 204
-  when: inventory_hostname == groups.vault|first and vault_api_cert_needed
-
 - include: ../shared/issue_cert.yml
   vars:
+    issue_cert_common_name: "{{ vault_pki_mounts.vault.roles[0].name }}"
     issue_cert_alt_names: "{{ groups.vault + ['localhost'] }}"
     issue_cert_hosts: "{{ groups.vault }}"
     issue_cert_ip_sans: >-
         [
         {%- for host in groups.vault -%}
         "{{ hostvars[host]['ansible_default_ipv4']['address'] }}",
+        {%- if hostvars[host]['ip'] is defined -%}
+        "{{ hostvars[host]['ip'] }}",
+        {%- endif -%}
         {%- endfor -%}
         "127.0.0.1","::1"
         ]
-    issue_cert_mount_path: "{{ vault_ca_options.common_name }}"
+    issue_cert_mount_path: "{{ vault_pki_mounts.vault.name }}"
     issue_cert_path: "{{ vault_cert_dir }}/api.pem"
-    issue_cert_headers: "{{ hostvars[groups.vault|first]['vault_headers'] }}"
-    issue_cert_role: vault
+    issue_cert_role: "{{ vault_pki_mounts.vault.roles[0].name }}"
     issue_cert_url: "{{ vault_leader_url }}"
   when: vault_api_cert_needed