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Railway•4mo ago

Railway Tailscale Internal Communication

Hey, I setup a own docker image which includes Uptime Kuma and Tailscale. Almost everything works, it connects to tailscale and everything, but I have the following issue: I can connect from devices in the Tailscale network to railway. But cannot connect from railway to devices in the Tailscale network. E.g. I can ping the railway container from my server, but cannot ping my server from the railway container Does anyone have an idea how I could fix that?

38 Replies

Percy•4mo ago

Project ID: 7a5090f7-4590-4318-aa16-c721a3fb704f

Basti 🔮🛡OP•4mo ago

Dockerfile

# Use the Uptime Kuma base image
FROM louislam/uptime-kuma:latest

# Install necessary dependencies for Tailscale
RUN apt-get update && \
    apt-get install -y curl iproute2 iptables && \
    apt-get clean && rm -rf /var/lib/apt/lists/*

# Download and install Tailscale
RUN curl -fsSL https://tailscale.com/install.sh | sh

# Expose Uptime Kuma port
EXPOSE 3001

# Copy entrypoint script
COPY entrypoint.sh /entrypoint.sh
RUN chmod +x /entrypoint.sh

# Set entrypoint
ENTRYPOINT ["/entrypoint.sh"]

# Use the Uptime Kuma base image
FROM louislam/uptime-kuma:latest

# Install necessary dependencies for Tailscale
RUN apt-get update && \
    apt-get install -y curl iproute2 iptables && \
    apt-get clean && rm -rf /var/lib/apt/lists/*

# Download and install Tailscale
RUN curl -fsSL https://tailscale.com/install.sh | sh

# Expose Uptime Kuma port
EXPOSE 3001

# Copy entrypoint script
COPY entrypoint.sh /entrypoint.sh
RUN chmod +x /entrypoint.sh

# Set entrypoint
ENTRYPOINT ["/entrypoint.sh"]

entrypoint.sh

#!/bin/bash

# Start Tailscale with userspace networking and proxy settings
/usr/sbin/tailscaled --state=/var/lib/tailscale/tailscaled.state --socket=/var/run/tailscale/tailscaled.sock --tun=userspace-networking --socks5-server=localhost:1055 --outbound-http-proxy-listen=localhost:1055 &
until /usr/bin/tailscale up --authkey=${TAILSCALE_AUTHKEY} --hostname=${TAILSCALE_HOSTNAME}
do
    sleep 0.1
done

# Start Uptime Kuma
node server/server.js

#!/bin/bash

# Start Tailscale with userspace networking and proxy settings
/usr/sbin/tailscaled --state=/var/lib/tailscale/tailscaled.state --socket=/var/run/tailscale/tailscaled.sock --tun=userspace-networking --socks5-server=localhost:1055 --outbound-http-proxy-listen=localhost:1055 &
until /usr/bin/tailscale up --authkey=${TAILSCALE_AUTHKEY} --hostname=${TAILSCALE_HOSTNAME}
do
    sleep 0.1
done

# Start Uptime Kuma
node server/server.js

Brody•4mo ago

I don't have any ideas, but I am very curious to know the use case for this?

Basti 🔮🛡OP•4mo ago

I want to monitor stuff on my server like the Database which I dont wanna expose to the public, and as I already use tailscale to connect to the database from other Servers in my network, I thought about also monitoring via this.

Brody•4mo ago

if you already have the knowhow to run databases on your own hardware, why not run kuma there too?

Basti 🔮🛡OP•4mo ago

And to avoid my status page going down when everything goes down, I wanna host it externally.

Brody•4mo ago

okay gotcha

Basti 🔮🛡OP•4mo ago

Yep. Because I had stuff going down lately and then I only receive the notifications when everythings back up.

Brody•4mo ago

what exactly are the errors you are getting when trying to have kuma ping the stuff you are running on your own hardware?

Basti 🔮🛡OP•4mo ago

On my hardware I have no problems. I just cannot Ping, http request, etc to my hardware from railway.

Basti 🔮🛡OP•4mo ago

https://pixelvault.co/clz6b040t002k6qiwrn4wwn4a

v2.PixelVault.co

And another 23.303 KB wasted on 29.07.2024 03:21.

Brody•4mo ago

you said you can't have kuma on railway ping the stuff you run on your hardware, what specifically are the errors though

Basti 🔮🛡OP•4mo ago

Oh yea These

Brody•4mo ago

can you send that as a regular image please

Basti 🔮🛡OP•4mo ago

No description

Basti 🔮🛡OP•4mo ago

Here.

Basti 🔮🛡OP•4mo ago

The ip is a valid tailscale ip.

No description

Brody•4mo ago

not the most helpful error message, I think you might find the help you need in some kind of tailscale community if one exists?

Basti 🔮🛡OP•4mo ago

:shrug: idk, the best place to ask would be here I assumed.

Brody•4mo ago

this pertains far more to tailscale than railway tbh

Basti 🔮🛡OP•4mo ago

Hm Okay. Just one more thing. Could it be that the railway and tailscale networks are interfering? As I saw the 100.x IP range in the logs of railway.

Basti 🔮🛡OP•4mo ago

No description

Brody•4mo ago

your container does not have a 100x IP, so that would be tailscale

Basti 🔮🛡OP•4mo ago

Hm weird. because I dont have any 100.64.x ip in my Tailscale network.

Brody•4mo ago

would that not be tailscale itself

Basti 🔮🛡OP•4mo ago

Uhm idk I mean the railway ip of the container is 100.83.185.48 Mine is 100.121.149.44 So yea.

Brody•4mo ago

I'm looking at it right now and the container ips are 10.x

Basti 🔮🛡OP•4mo ago

Hm weird.

Brody•4mo ago

interface name: railnet0
├─ flags: up, broadcast, multicast
├─ ipv4 address: 10.250.10.122
├─ ipv6 addresses: fd12:74d7:7e85::a4:ee15:a937, fe80::a0aa:eeff:fe15:a937
└─ hardware address: a2:aa:ee:15:a9:37

interface name: railnet0
├─ flags: up, broadcast, multicast
├─ ipv4 address: 10.250.10.122
├─ ipv6 addresses: fd12:74d7:7e85::a4:ee15:a937, fe80::a0aa:eeff:fe15:a937
└─ hardware address: a2:aa:ee:15:a9:37

Basti 🔮🛡OP•4mo ago

Weird.

Brody•4mo ago

likely some small misconfiguration with tailscale, do they have a forum or community you can ask?

Basti 🔮🛡OP•4mo ago

Yes they have a forum. Ig I'm gonna ask there then.

Brody•4mo ago

perfect, let me know how that goes and if you need any railway specific information you can ask me

Basti 🔮🛡OP•4mo ago

👍

Basti 🔮🛡OP•4mo ago

http://100.83.185.48:60582/ One last quick thing. It must have some sort of connection. As it knows my tailscale IP, plus my tailscale hostname.

No description

Basti 🔮🛡OP•4mo ago

Btw can I somehow ssh into the container? To make debugging easier?

Brody•4mo ago

railway does not provide that

Basti 🔮🛡OP•4mo ago

Okay.

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