Munin

#!/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 >> "${MAIL_CONF_PATH}" <> "${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 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' '$HOST'" fi done # placeholder html to prevent permission error if [ ! -e /munin/www/index.html ]; then cat << EOF > /munin/www/index.html Munin Munin has not run yet. Please try again in a few moments. EOF fi # start rsyslogd truncate -s 0 /tmp/rsyslogd.pid #/usr/sbin/rsyslogd -i /tmp/rsyslogd.pid # start munin updates truncate -s 0 /munin/log/munin-update.log /usr/local/bin/supercronic -split-logs /etc/munin/munin.cron & cron_pid=$! 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