proxmox-backup: fix hosts file

roles/proxmox-backup/tasks/main.yml

@@ -2,6 +2,11 @@
   hostname:
     name: '{{ inventory_hostname }}'
 
+- name: Set up hosts file
+  template:
+    dest: /etc/hosts
+    src: hosts.j2
+
 - name: Set up resolv.conf
   template:
     dest: /etc/resolv.conf

roles/proxmox-backup/templates/hosts.j2

@@ -0,0 +1,12 @@
+127.0.0.1 localhost.localdomain localhost
+
+::1     ip6-localhost ip6-loopback
+fe00::0 ip6-localnet
+ff00::0 ip6-mcastprefix
+ff02::1 ip6-allnodes
+ff02::2 ip6-allrouters
+ff02::3 ip6-allhosts
+
+{% for address in interfaces | selectattr('name', '==', 'lo') | map(attribute='ip_addresses') | first %}
+{{ address.address | ipaddr('address') }} {{ address.dns_name }} {{ inventory_hostname }}
+{% endfor %}