template munin-node.conf, should fix the bug where munin-node cant bind to local ipv4

Dockerfile

@@ -1,7 +1,5 @@
 FROM ubuntu:24.04
 
-# install and configure munin
-
 # hadolint ignore=DL3008
 RUN apt-get update && \
 	RUNLEVEL=1 DEBIAN_FRONTEND=noninteractive apt-get -y --no-install-recommends install \
@@ -44,6 +42,7 @@ RUN chmod +x /etc/munin/plugins/munin_stats && \
 COPY 000-default.conf /etc/apache2/sites-available/000-default.conf
 COPY logrotate-munin /etc/logrotate.d/munin
 COPY munin.conf /etc/munin/munin.conf
+COPY munin-node.conf /etc/munin/munin-node.conf
 COPY ssmtp.conf /etc/ssmtp/ssmtp.conf
 COPY revaliases /etc/ssmtp/revaliases
 COPY munin_mail.conf /etc/munin/munin-conf.d/munin_mail.conf

munin-node.conf

@@ -0,0 +1,62 @@
+#
+# Example config-file for munin-node
+#
+
+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 munin-master
+
+# 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 0.0.0.0
+
+# And which port
+port 4949

run.sh

@@ -24,7 +24,6 @@ THISSERVERNAME=${SERVERNAME:="munin"}
 sed -i "s/^\[localhost\.localdomain\]/\[$SERVERNAME\]/g" /etc/apache2/sites-available/000-default.conf
 
 # configure mail notification
-
 if [[ -n "$MAILCONTACT" && -n "$MAILSERVER" && -n "$MAILPORT" && -n "$MAILUSER" && -n "$MAILPASSWORD" && -n "$MAILDOMAIN" ]] ; then
   MAILCONTACT=${MAILCONTACT:="contact@domain.test"}
   sed -i "s/mailcontact/$MAILCONTACT/g" /etc/ssmtp/ssmtp.conf