initial working form

Dockerfile

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+FROM ubuntu:latest
+
+# Munin specific
+VOLUME /opt/munin
+EXPOSE 2813
+
+# Run s6-overlay as the init so we get services and similar
+ENTRYPOINT [ "/init" ]
+
+# Don't bother us for selections during install
+ENV DEBIAN_FRONTEND="noninteractive"
+
+# We work off /opt, the *nix way
+WORKDIR /opt/
+
+# Install and base setup all the things
+RUN apt update && apt upgrade -y && \
+  apt install -y curl jq xz-utils lm-sensors && \
+  S6_RELEASE=$(curl -sX GET "https://api.github.com/repos/just-containers/s6-overlay/tags" \
+	  | jq -r .[0].name); \
+  echo "**** s6-overlay release: ${S6_RELEASE} ****" && \
+  echo "**** Installing s6-overlay ****" && \
+  curl -L https://github.com/just-containers/s6-overlay/releases/latest/download/s6-overlay-x86_64.tar.xz \
+    -o /opt/s6-overlay-x86_64.tar.xz && \
+  curl -L https://github.com/just-containers/s6-overlay/releases/latest/download/s6-overlay-noarch.tar.xz \
+    -o /opt/s6-overlay-noarch.tar.xz && \
+  tar -C / -Jxpf /opt/s6-overlay-x86_64.tar.xz && \
+  tar -C / -Jxpf /opt/s6-overlay-noarch.tar.xz && \
+  echo "**** munin related ****" && \
+  apt install -y munin lighttpd && \
+  echo "**** cleanup ****" && \
+  rm /opt/s6-overlay*.tar.xz && \
+  apt remove --purge -y jq xz-utils && \
+  apt autoremove --purge -y && \
+  rm -rf /var/lib/apt/lists/*
+
+# Copy the s6 related 'stuff' to the container
+ADD /root/ /

README.md

@@ -1 +1,9 @@
 Simple container with munin leveraging s6 init for services/cron
+
+Host config:
+
+```
+pacman -S lm_sensors
+sensors-detect # walk through this completely
+systemctl enable --now lm_sensors
+```

build.sh

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+#!/bin/bash
+
+git pull
+sudo docker build --no-cache --pull -t munin:latest -f Dockerfile .

root/etc/s6-overlay/s6-rc.d/cron/run

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+#!/command/with-contenv sh
+
+# this line here is what we should have to get rid of the hard link error
+touch /etc/crontab /etc/cron.*/*
+
+cron -f

root/etc/s6-overlay/s6-rc.d/cron/type

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+longrun

root/etc/s6-overlay/s6-rc.d/munin-lighttpd/run

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+#!/command/with-contenv bash
+
+lighttpd -D -f /opt/munin/lighttpd-munin.conf

root/etc/s6-overlay/s6-rc.d/munin-lighttpd/type

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+longrun

root/etc/s6-overlay/s6-rc.d/munin-node/run

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+#!/command/with-contenv bash
+
+munin-node

root/etc/s6-overlay/s6-rc.d/munin-node/type

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+longrun

root/etc/s6-overlay/s6-rc.d/setup/setup

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+#!/command/with-contenv bash
+
+####################
+# Munin
+####################
+echo "---------- Setting up munin config ----------"
+if [ ! -d "/opt/munin" ] ; then
+  mkdir /opt/munin
+fi
+if [ ! -f "/opt/munin/munin.conf" ] ; then
+cat > /opt/munin/munin.conf <<EOF
+dbdir /opt/munin/db
+htmldir /opt/munin/www
+logdir /opt/munin/log
+rundir /opt/munin/run
+cgitmpdir /opt/munin/cgi-tmp
+
+graph_strategy cron
+html_strategy cron
+
+timeout 15
+
+[munin.local]
+    address 127.0.0.1
+    use_node_name yes
+EOF
+fi
+if [ ! -f "/opt/munin/munin-node.conf" ] ; then
+cat > /opt/munin/munin-node.conf <<EOF
+log_level 4
+log_file /opt/munin/log/munin-node.log
+pid_file /opt/munin/munin-node.pid
+
+background 0
+setsid 0
+
+user munin
+group munin
+
+# 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\$
+
+allow ^127\.0\.0\.1\$
+allow ^::1\$
+
+host 127.0.0.1
+port 4949
+EOF
+fi
+rm /etc/munin/munin-node.conf
+ln -sf /opt/munin/munin-node.conf /etc/munin/munin-node.conf
+rm /etc/munin/munin.conf
+ln -sf /opt/munin/munin.conf /etc/munin/munin.conf
+echo "---------- Setting up munin directories ---------"
+if [ ! -d "/opt/munin/log" ] ; then
+mkdir /opt/munin/log
+fi
+chown munin: /opt/munin/log
+if [ ! -d "/opt/munin/run" ] ; then
+mkdir /opt/munin/run
+fi
+chown munin: /opt/munin/run
+if [ ! -d "/opt/munin/db" ] ; then
+mkdir /opt/munin/db
+fi
+chown munin: /opt/munin/db
+if [ ! -d "/opt/munin/www" ] ; then
+mkdir /opt/munin/www
+fi
+chown munin: /opt/munin/www
+if [ ! -d "/opt/munin/cgi-tmp" ] ; then
+mkdir /opt/munin/cgi-tmp
+fi
+chown munin: /opt/munin/cgi-tmp
+if [ ! -f "/opt/munin/log/munin-update.log" ] ; then
+touch /opt/munin/log/munin-update.log
+chown munin: /opt/munin/log/munin-update.log
+fi
+echo "---------- Setting up lighttpd munin config ----------"
+if [ ! -f "/opt/munin/lighttpd-munin.conf" ] ; then
+cat > /opt/munin/lighttpd-munin.conf <<EOF
+server.username = "munin"
+server.groupname = "munin"
+
+server.document-root = "/opt/munin/www"
+server.port = 2813
+
+server.errorlog         = "/dev/stdout"
+accesslog.filename      = "/dev/stdout"
+dir-listing.activate    = "disable"
+server.modules          = (
+                            "mod_access",
+                            "mod_accesslog",
+                            "mod_alias",
+                            "mod_rewrite",
+                            "mod_redirect",
+                            "mod_cgi",
+                            "mod_fastcgi",
+                            "mod_auth",
+                            "mod_authn_file",
+                            )
+server.pid-file         = "/run/lighttpd-munin.pid"
+server.follow-symlink = "enable"
+index-file.names = ( "index.html", "index.htm" )
+
+url.redirect += ( "^/*$" => "/munin/" )
+
+\$HTTP["url"] =~ "/munin-cgi/munin-cgi-graph" {
+  alias.url += ( "/munin-cgi/munin-cgi-graph" => "/usr/lib/munin/cgi/munin-cgi-graph" )
+  cgi.assign = ( "" => "" )
+}
+
+alias.url += ( "/munin/static" => "/etc/munin/static" )
+alias.url += ( "/munin" => "/opt/munin/www" )
+
+mimetype.assign         = (
+                                ".html" => "text/html",
+                                ".txt" => "text/plain",
+                                ".css" => "text/css",
+                                ".js" => "application/x-javascript",
+                                ".jpg" => "image/jpeg",
+                                ".jpeg" => "image/jpeg",
+                                ".gif" => "image/gif",
+                                ".png" => "image/png",
+                                "" => "application/octet-stream"
+                        )
+EOF
+fi
+echo "---------- Munin node setup ----------"
+rm /etc/munin/plugin-conf.d/*
+munin-node-configure --shell --remove-also --debug | sh -x
+#su - munin --shell=/bin/sh /usr/bin/munin-cron

root/etc/s6-overlay/s6-rc.d/setup/type

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+oneshot

root/etc/s6-overlay/s6-rc.d/setup/up

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+/etc/s6-overlay/s6-rc.d/setup/setup

run.sh

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+#!/bin/bash
+
+echo "**** Building latest Munin container ****"
+$(pwd)/build.sh
+
+echo "**** Deleting Original Container ****"
+sudo docker rm -f munin
+
+echo "**** Running Munin ****"
+sudo docker run -itd \
+    --restart unless-stopped \
+    --network services \
+    --name munin \
+    -e TZ=UTC \
+    -e DEBUG=1 \
+    -p 2813:2813/tcp \
+    -l diun.enable=true \
+    -l traefik.enable=false \
+    -v /var/munin:/opt/munin \
+    --mount type=tmpfs,destination=/opt/munin/www \
+    --mount type=tmpfs,destination=/opt/munin/log \
+    --mount type=tmpfs,destination=/opt/munin/run \
+    --mount type=tmpfs,destination=/opt/munin/cgi-tmp \
+    munin:latest

test.sh

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+#!/bin/bash
+
+echo "**** Building latest Munin container ****"
+$(pwd)/build.sh
+
+echo "**** Deleting Original Container ****"
+sudo docker rm -f munin
+
+echo "**** Running Munin ****"
+sudo docker run -it \
+    --restart unless-stopped \
+    --network services \
+    --name munin \
+    -e TZ=UTC \
+    -e DEBUG=1 \
+    -p 2813:2813/tcp \
+    -l diun.enable=true \
+    -l traefik.enable=false \
+    --mount type=tmpfs,destination=/opt/munin/www \
+    --mount type=tmpfs,destination=/opt/munin/log \
+    --mount type=tmpfs,destination=/opt/munin/run \
+    --mount type=tmpfs,destination=/opt/munin/cgi-tmp \
+    munin:latest