commit 6cc7d42345356e3c90a33dbb6e86b755fbe4477e
Author: Pierre Riteau <pierre@stackhpc.com>
Date:   Fri Oct 9 18:51:38 2020 +0200

    Apply bool filter to all enable_prometheus_* variables
    
    Change-Id: I639145a709f1d3b9882bbdfb20a754646d1f5270
    (cherry picked from commit 6985e9a67cc8da2eeb2dea3b799ff37b5a8d158a)

diff --git a/ansible/roles/prometheus/defaults/main.yml b/ansible/roles/prometheus/defaults/main.yml
index 4902907..22a1629 100644
--- a/ansible/roles/prometheus/defaults/main.yml
+++ b/ansible/roles/prometheus/defaults/main.yml
@@ -16,7 +16,7 @@ prometheus_services:
     dimensions: "{{ prometheus_server_dimensions }}"
     haproxy:
       prometheus_server:
-        enabled: "{{ enable_prometheus }}"
+        enabled: "{{ enable_prometheus | bool }}"
         mode: "http"
         external: false
         port: "{{ prometheus_port }}"
@@ -98,14 +98,14 @@ prometheus_services:
     dimensions: "{{ prometheus_alertmanager_dimensions }}"
     haproxy:
       prometheus_alertmanager:
-        enabled: "{{ enable_prometheus_alertmanager }}"
+        enabled: "{{ enable_prometheus_alertmanager | bool }}"
         mode: "http"
         external: false
         port: "{{ prometheus_alertmanager_port }}"
         auth_user: "{{ prometheus_alertmanager_user }}"
         auth_pass: "{{ prometheus_alertmanager_password }}"
       prometheus_alertmanager_external:
-        enabled: "{{ enable_prometheus_alertmanager }}"
+        enabled: "{{ enable_prometheus_alertmanager | bool }}"
         mode: "http"
         external: true
         port: "{{ prometheus_alertmanager_port }}"
diff --git a/ansible/roles/prometheus/templates/prometheus-server.json.j2 b/ansible/roles/prometheus/templates/prometheus-server.json.j2
index 3849cf9..da3a8fb 100644
--- a/ansible/roles/prometheus/templates/prometheus-server.json.j2
+++ b/ansible/roles/prometheus/templates/prometheus-server.json.j2
@@ -7,7 +7,7 @@
             "owner": "prometheus",
             "perm": "0600"
         }
-{% if enable_prometheus_alertmanager %}
+{% if enable_prometheus_alertmanager | bool %}
         ,{
             "source": "{{ container_config_directory }}/*.rules",
             "dest": "/etc/prometheus/",