TrueNAS Jail mDNS Setup Kickstarter

mdns-setup.sh

# An explanation of this script is available on my blog https://jackburgess.dev/blog/truenas-jails-access-via-mdns
# This allows you a nice way of connecting to your jails via their hostname using mDNS
# e.g. for Netdata, which runs on port 3000, you can access it on your jail via:
# http://<jail ip>:3000/
# But wouldn't it be nice to access it on
# http://jailhostname.local/
#
# Oneliner to kickstart
# pkg install -y curl && curl --silent https://gist.githubusercontent.com/jack828/b8375b16b6fb9eae52201d4deb563ab7/raw | /bin/sh -s PORT

PORT=$1
HOSTNAME=$(hostname)

echo "Installing services..."

pkg install -y avahi-app socat

sysrc dbus_enable="YES"
sysrc avahi_daemon_enable="YES"
sysrc socat_enable="YES"

rm /usr/local/etc/avahi/services/*.service

cat > /usr/local/etc/avahi/services/http.service << EOF
<?xml version="1.0" standalone='no'?><!--*-nxml-*-->
<!DOCTYPE service-group SYSTEM "avahi-service.dtd">
<service-group>
  <name replace-wildcards="yes">%h</name>
  <service>
    <type>_http._tcp</type>
    <port>80</port>
  </service>
</service-group>
EOF

cat >> /usr/local/etc/socat-instances.conf << EOF

[jailredirect]
daemonuser=root
flags="tcp-listen:80,reuseaddr,fork tcp:localhost:$PORT"

EOF

echo "Starting services..."

service dbus start
service avahi-daemon start
service socat start jailredirect

echo "Done! You can now access your jail service on http://$HOSTNAME.local/"

Hi, how i can revert this ? It's seem not working anymore :/

Hey @Erdack54, if you have it on a fresh jail you can simply delete the jail.

Otherwise, you can just

pkg delete -y avahi-app socat

sysrc dbus_enable="NO"
sysrc avahi_daemon_enable="NO"
sysrc socat_enable="NO"

Otherwise, I need more information to help you.

@jack828 Thank you for your quick response, I'm going to spend a little more time looking because I have another problem at the same time a little more important, TrueNAS becomes totally inaccessible after 30m :/ I'll come back to you if it concerns your script, have a good day 🙂

@Erdack54 No problem. I did have an issue that cleared itself eventually wherein socat consumed a lot of CPU and locked me out. Do let me know how you get on!