How can i access CrateDB Admin UI on Ubuntu server 18.04 across the LAN? - cratedb

Question

I installed CrateDB on an Ubuntu server 18.04 across the LAN. But I am not able to access the Admin-UI and I get the following message:
Firefox can’t establish a connection to the server at 192.168.1.102:4200.
How can i solve this problem?
CrateDB is running on the server and this is the status:
sudo systemctl status crate.service
crate.service - CrateDB Server
Loaded: loaded (/lib/systemd/system/crate.service; enabled; vendor preset: enabled)
Active: active (running) since Sat 2018-06-30 14:15:38 +04; 18min ago
Docs: https://crate.io/docs/
Main PID: 17614 (java)
Tasks: 35 (limit: 4649)
CGroup: /system.slice/crate.service
└─17614 java -Xms512m -Xmx512m -Djava.awt.headless=true -XX:+UseConcMarkSweepGC -XX:CMSInitiatingOccupancyFraction=75 -XX:+U
...

Answer 1

per default cratedb binds itself to local which means that you can't access it from the outside.
you need to set network.host to something like _site_.
https://crate.io/docs/crate/reference/en/latest/config/node.html#hosts
you need to make sure all the bootstrap checks pass: https://crate.io/docs/crate/guide/en/latest/admin/bootstrap-checks.html

Answer 2

Solution 1
And in addition to what #Johannes Moser has replied, that first you need to add your machine's IP in crate.yml file, against network.host.
Then optionally you can specify psql.port, which defaults to 5432, and then you can access Crate from outside like:
l.oc.al.ip/PSQL_PORT
Solution 2
Use nGROK
ngrok exposes local servers behind NATs and firewalls to the public
internet over secure tunnels.