Munin

#!/bin/bash NODES=${NODES:-} SNMP_NODES=${SNMP_NODES:-} MUNIN_USERS=${MUNIN_USERS:-user} MUNIN_PASSWORDS=${MUNIN_PASSWORDS:-password} MAIL_CONF_PATH='/var/lib/munin/.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}" truncate -s 0 "${MAIL_CONF_PATH}" # set volume ownerships chown -R munin:munin /var/log/munin chown -R munin:munin /var/lib/munin chown -R munin:munin /var/run/munin chown -R munin:munin /var/cache/munin if [ "${SMTP_USE_TLS}" = true ] ; then cat >> "${MAIL_CONF_PATH}" <> "${MAIL_CONF_PATH}" <> "${MAIL_CONF_PATH}" <> /etc/munin/munin.conf if [ "${SMTP_ALWAYS_SEND}" = true ] ; then echo 'contact.mail.always_send warning critical' >> /etc/munin/munin.conf fi fi # generate the Munin auth username/password file if [ ! -f /etc/munin/htpasswd.users ]; then uc = 0 IFS=' ' read -ra ARR_USERS <<< "$MUNIN_USERS" IFS=' ' read -ra ARR_PASSWORDS <<< "$MUNIN_PASSWORDS" for u in "${ARR_USERS[@]}"; do printf "${u}:`openssl passwd -apr1 ${ARR_PASSWORDS[uc]}`\n" >> /etc/munin/htpasswd.users (( uc++ )) done 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 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 fi done [ -d /var/cache/munin/www ] || mkdir /var/cache/munin/www # placeholder html to prevent permission error if [ ! -e /var/cache/munin/www/index.html ]; then cat << EOF > /var/cache/munin/www/index.html Munin Munin has not run yet. Please try again in a few moments. EOF chown munin:munin -R /var/cache/munin/www chmod g+w /var/cache/munin/www/index.html fi # start rsyslogd /usr/sbin/rsyslogd # start cron /usr/sbin/cron # start local munin-node /usr/sbin/munin-node echo "Using the following munin nodes:" echo $NODES # start spawn-cgi to enable CGI interface with munin (dynamix graph generation) spawn-fcgi -s /var/run/munin/fcgi-graph.sock -U munin -u munin -g munin /usr/lib/munin/cgi/munin-cgi-graph # start nginx /usr/sbin/nginx # show logs echo "Tailing /var/log/syslog..." tail -F /var/log/syslog /var/log/munin/munin-update.log & pid=$! echo "tail -F running in $pid" sleep 1 trap "echo 'stopping processes' ; kill $pid $(cat /var/run/munin/munin-node.pid) $(cat /var/run/nginx.pid) $(cat /var/run/crond.pid) $(cat /var/run/rsyslogd.pid)" SIGTERM SIGINT echo "Waiting for signal SIGINT/SIGTERM" wait