use hashing filter from passlib

ansible/roles/apps/tasks/prometheus.yml

 ---
-- name: Generate htpasswd hash
-  shell: openssl passwd -apr1 "{{ prometheus_basic_auth }}"
-  register: prometheus_passwd
-
 - name: Create auth secret for basic auth
   tags:
     - prometheus
@@ -17,7 +13,7 @@
         namespace: "oas"
         name: "prometheus-basic-auth"
       data:
-        auth: "{{ ('admin:' + prometheus_passwd.stdout )  | b64encode }}"
+        auth: "{{ ('admin:' + (prometheus_basic_auth | password_hash('apr_md5_crypt')) + '\n')  | b64encode }}"
 - name: Create Kubernetes secret with prometheus settings
   tags:
     - config

requirements-stable.txt

@@ -52,3 +52,4 @@ urllib3==1.25.8
 wcwidth==0.1.8
 websocket-client==0.57.0
 zipp==3.1.0
+passlib==1.7.2

requirements.txt

@@ -18,3 +18,4 @@ wheel>=0.33.1
 pytz>=2019.1
 -e git+https://open.greenhost.net/greenhost/cloud-api#egg=greenhost_cloud
 -e git+https://open.greenhost.net/openappstack/oas_behave#egg=oas_behave
+passlib>=1.7.2