Fait écouter munin-node uniquement en IPv4 dans Vagrant

roles/munin/files/etc/munin-node.conf

@@ -0,0 +1,66 @@
+#
+# The only difference with the file and what is installed by default is at the
+# end of file, where we make munin-node listen only on the IPv4 localhost
+# address. Otherwise, there is a bug in Munin preventing munin-node to start,
+# probably because there is no IPv6 in the Vagrant box.
+#
+
+log_level 4
+log_file /var/log/munin/munin-node.log
+pid_file /var/run/munin/munin-node.pid
+
+background 1
+setsid 1
+
+user root
+group root
+
+# This is the timeout for the whole transaction.
+# Units are in sec. Default is 15 min
+#
+# global_timeout 900
+
+# This is the timeout for each plugin.
+# Units are in sec. Default is 1 min
+#
+# timeout 60
+
+# Regexps for files to ignore
+ignore_file [\#~]$
+ignore_file DEADJOE$
+ignore_file \.bak$
+ignore_file %$
+ignore_file \.dpkg-(tmp|new|old|dist)$
+ignore_file \.rpm(save|new)$
+ignore_file \.pod$
+
+# Set this if the client doesn't report the correct hostname when
+# telnetting to localhost, port 4949
+#
+#host_name localhost.localdomain
+
+# A list of addresses that are allowed to connect.  This must be a
+# regular expression, since Net::Server does not understand CIDR-style
+# network notation unless the perl module Net::CIDR is installed.  You
+# may repeat the allow line as many times as you'd like
+
+allow ^127\.0\.0\.1$
+allow ^::1$
+
+# If you have installed the Net::CIDR perl module, you can use one or more
+# cidr_allow and cidr_deny address/mask patterns.  A connecting client must
+# match any cidr_allow, and not match any cidr_deny.  Note that a netmask
+# *must* be provided, even if it's /32
+#
+# Example:
+#
+# cidr_allow 127.0.0.1/32
+# cidr_allow 192.0.2.0/24
+# cidr_deny  192.0.2.42/32
+
+# Which address to bind to;
+# host *
+host 127.0.0.1
+
+# And which port
+port 4949

roles/munin/handlers/main.yml

@@ -0,0 +1,4 @@
+- name: restart munin-node
+  ansible.builtin.systemd:
+    name: munin-node
+    state: restarted

roles/munin/tasks/main.yml

@@ -16,7 +16,19 @@
     src: munin.conf.j2
     dest: /etc/munin/munin.conf
     mode: u=rw,g=r,o=r
-  when: http_host is not false
+  when: http_host is not false  # when we are not in Vagrant
+
+- name: makes munin-node listen on IPv4 in Vagrant
+  # otherwise there is a bug in Munin preventing munin-node to start, probably
+  # because there is no IPv6 in the Vagrant box
+  ansible.builtin.copy:
+    src: etc/munin-node.conf
+    dest: /etc/munin/munin-node.conf
+    owner: root
+    group: root
+    mode: "0644"
+  notify: restart munin-node
+  when: http_host is false  # when we are in Vagrant
 
 - name: create a munin-node override directory
   ansible.builtin.file: