Cannot add Ngrok command in Dockerfile - docker

Question

I'm trying to add RUN ngrok config add-authoken command in Dockerfile. From the error output, it seems like ngrok config command itself is working fine but for some reason it's not recognizing the add-authtoken part.
My Dockerfile:
FROM node:16
ARG NGROK_TOKEN
RUN npm install -g \
ngrok \
pm2 \
typescript
WORKDIR /app
RUN ngrok config add-authtoken ${NGROK_TOKEN} # Here is where error occurs.
# ...content continues...
The docker build command:
docker build --file="./Dockerfile" --build-arg="NGROK_TOKEN=abc" .
The error:
=> ERROR [ 4/11] RUN ngrok config add-authtoken abc 0.8s
------
> [ 4/11] RUN ngrok config add-authtoken abc:
#7 0.736 NAME:
#7 0.736 ngrok - tunnel local ports to public URLs and inspect traffic
#7 0.736
#7 0.736 DESCRIPTION:
#7 0.736 ngrok exposes local networked services behinds NATs and firewalls to the
#7 0.736 public internet over a secure tunnel. Share local websites, build/test
#7 0.736 webhook consumers and self-host personal services.
#7 0.736 Detailed help for each command is available with 'ngrok help <command>'.
#7 0.736 Open http://localhost:4040 for ngrok's web interface to inspect traffic.
#7 0.736
#7 0.736 EXAMPLES:
#7 0.736 ngrok http 80 # secure public URL for port 80 web server
#7 0.736 ngrok http -subdomain=baz 8080 # port 8080 available at baz.ngrok.io
#7 0.737 ngrok http foo.dev:80 # tunnel to host:port instead of localhost
#7 0.737 ngrok http https://localhost # expose a local https server
#7 0.737 ngrok tcp 22 # tunnel arbitrary TCP traffic to port 22
#7 0.737 ngrok tls -hostname=foo.com 443 # TLS traffic for foo.com to port 443
#7 0.737 ngrok start foo bar baz # start tunnels from the configuration file
#7 0.737
#7 0.737 VERSION:
#7 0.737 2.3.41
#7 0.737
#7 0.737 AUTHOR:
#7 0.737 inconshreveable - <alan#ngrok.com>
#7 0.737
#7 0.737 COMMANDS:
#7 0.737 authtoken save authtoken to configuration file
#7 0.737 credits prints author and licensing information
#7 0.737 http start an HTTP tunnel
#7 0.737 start start tunnels by name from the configuration file
#7 0.737 tcp start a TCP tunnel
#7 0.737 tls start a TLS tunnel
#7 0.737 update update ngrok to the latest version
#7 0.737 version print the version string
#7 0.737 help Shows a list of commands or help for one command
#7 0.737
#7 0.737 ERROR: Unrecognized command: config
------
executor failed running [/bin/sh -c ngrok config add-authtoken ${NGROK_TOKEN}]: exit code: 1

Answer 1

The command you are running is for the v3.X Agent, but you are running a v2.3.41 agent.