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#!/bin/bash
NODES=${NODES:-}
SNMP_NODES=${SNMP_NODES:-}
SSH_NODES=${SSH_NODES:-}
MUNIN_USERS=${MUNIN_USERS:-${MUNIN_USER:-user}}
MUNIN_PASSWORDS=${MUNIN_PASSWORDS:-${MUNIN_PASSWORD:-password}}
MAIL_CONF_PATH='/munin/db/.mailrc'
SMTP_USE_TLS=${SMTP_USE_TLS:-false}
SMTP_ALWAYS_SEND=${SMTP_ALWAYS_SEND:-true}
SMTP_MESSAGE_DEFAULT='[${var:group};${var:host}] -> ${var:graph_title} -> warnings: ${loop<,>:wfields ${var:label}=${var:value}} / criticals: ${loop<,>:cfields ${var:label}=${var:value}}'
SMTP_MESSAGE="${SMTP_MESSAGE:-$SMTP_MESSAGE_DEFAULT}"
mkdir -p /munin/{db,log,www/cache}
[ -a /munin/db/cgi-tmp ] || ln -s ../www/cache /munin/db/cgi-tmp
[ -a /var/lib/munin/cgi-tmp ] || ln -s /munin/www/cache /var/lib/munin/cgi-tmp
[ -a /var/log/nginx ] || ln -s /tmp /var/log/nginx
truncate -s 0 "${MAIL_CONF_PATH}"
if [ "${SMTP_USE_TLS}" = true ] ; then
cat >> "${MAIL_CONF_PATH}" <<EOF
set smtp-use-starttls
set ssl-verify=ignore
EOF
fi
if [ -n "${SMTP_HOST}" -a -n "${SMTP_PORT}" ] ; then
cat >> "${MAIL_CONF_PATH}" <<EOF
set smtp=smtp://${SMTP_HOST}:${SMTP_PORT}
EOF
fi
if [ -n "${SMTP_USERNAME}" -a -n "${SMTP_PASSWORD}" ] ; then
cat >> "${MAIL_CONF_PATH}" <<EOF
set smtp-auth=login
set smtp-auth-user=${SMTP_USERNAME}
set smtp-auth-password=${SMTP_PASSWORD}
EOF
fi
grep -q 'contact.mail' /etc/munin/munin.conf; rc=$?
if [ $rc -ne 0 -a -n "${ALERT_RECIPIENT}" -a -n "${ALERT_SENDER}" ] ; then
echo "Setup alert email from ${ALERT_SENDER} to ${ALERT_RECIPIENT}"
echo "contact.mail.command mail -r ${ALERT_SENDER} -s '${SMTP_MESSAGE}' ${ALERT_RECIPIENT}" >> /etc/munin/munin.conf
if [ "${SMTP_ALWAYS_SEND}" = true ] ; then
echo 'contact.mail.always_send warning critical' >> /etc/munin/munin.conf
fi
fi
# generate node list
for NODE in $NODES
do
NAME=`echo $NODE | cut -d ":" -f1`
HOST=`echo $NODE | cut -d ":" -f2`
PORT=`echo $NODE | cut -d ":" -f3`
if [ ${#PORT} -eq 0 ]; then
PORT=4949
fi
if ! grep -q "'^$HOST$'" /etc/munin/munin.conf ; then
cat << EOF >> /etc/munin/munin.conf
[$NAME]
address $HOST
use_node_name yes
port $PORT
EOF
echo "Added node '$NAME' '$HOST'"
fi
done
# generate node list
for NODE in $SNMP_NODES
do
NAME=`echo $NODE | cut -d ":" -f1`
HOST=`echo $NODE | cut -d ":" -f2`
PORT=`echo $NODE | cut -d ":" -f3`
if [ ${#PORT} -eq 0 ]; then
PORT=4949
fi
if ! grep -q "'^$HOST$'" /etc/munin/munin.conf ; then
cat << EOF >> /etc/munin/munin.conf
[$NAME]
address $HOST
use_node_name no
port $PORT
EOF
echo "Added SNMP node '$NAME' '$HOST'"
fi
done
for SSH_NODE in $SSH_NODES
do
NAME=`echo $SSH_NODE | cut -d ":" -f1`
HOST=`echo $SSH_NODE | cut -d ":" -f2`
PORT=`echo $SSH_NODE | cut -d ":" -f3`
if [ ${#PORT} -eq 0 ]; then
PORT=4949
fi
if ! grep -q "'^$HOST$'" /etc/munin/munin.conf ; then
cat << EOF >> /etc/munin/munin.conf
[$NAME]
address ssh://$HOST/usr/bin/nc localhost 4949
use_node_name yes
port $PORT
EOF
echo "Added SSH node '$NAME' '$HOST'"
fi
done
# placeholder html to prevent permission error
if [ ! -e /munin/www/index.html ]; then
cat << EOF > /munin/www/index.html
<html>
<head>
<title>Munin</title>
</head>
<body>
Munin has not run yet. Please try again in a few moments.
</body>
</html>
EOF
fi
# start rsyslogd
truncate -s 0 /tmp/rsyslogd.pid
#/usr/sbin/rsyslogd -i /tmp/rsyslogd.pid
# start munin updates
truncate -s 0 /munin/log/munin-update.log
/usr/local/bin/supercronic -split-logs /etc/munin/munin.cron & cron_pid=$!
echo "Using the following munin nodes:"
echo $NODES
echo "(ssh) $SSH_NODES"
echo "(snmp) $SNMP_NODES"
# Pregenerate data
echo "First run"
munin-cron
echo "Start data servers"
# start spawn-cgi to enable CGI interface with munin (dynamix graph generation)
spawn-fcgi -n -p 9000 /usr/lib/munin/cgi/munin-cgi-graph & graph_pid=$!
spawn-fcgi -n -p 9001 /usr/lib/munin/cgi/munin-cgi-html & html_pid=$1
# start nginx
/usr/sbin/nginx
# show logs
echo "Tailing syslog and munin-update log..."
tail -F /munin/log/munin-update.log & pid=$!
echo "tail -F running in $pid"
sleep 1
trap "echo 'stopping processes' ; kill $pid $cron_pid $graph_pid $html_pid $(cat /tmp/nginx.pid) $(cat /tmp/rsyslogd.pid)" SIGTERM SIGINT
echo "Waiting for signal SIGINT/SIGTERM"
wait
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