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hadabot / hadabot_main

Content used in collaboration with various Hadabot blog posts to get guide you through learning ROS2.
https://blog.hadabot.com
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ROS2-web-bridge container fails after starting #17

Closed agillies8 closed 3 years ago

agillies8 commented 3 years ago

To re-create: 1) Followed instructions to start demo of hadabot system by following these instructions:

$ git clone https://github.com/hadabot/hadabot_main.git $ cd hadabot_main/docker $ docker-compose up -d

2) Navigated to a new tab, opened localhost:9123, and can see the browser VScode terminal, and everything appears to be working, great

3) Open up a new tab at: https://www.hadabot.com/tools/teleop.html, expecting to see a confirmation that it is connecting to the ROS2 codeserver container via the web-bridge container, however connection fails.

4) Upon further investigation of the log files, the web-server container has exited with this error message:

/home/user/ros2-web-bridge/node_modules/rclnodejs/lib/context.js:47
  static _instances = [];
                    ^

SyntaxError: Unexpected token =
    at new Script (vm.js:79:7)
    at createScript (vm.js:251:10)
    at Object.runInThisContext (vm.js:303:10)
    at Module._compile (internal/modules/cjs/loader.js:657:28)
    at Object.Module._extensions..js (internal/modules/cjs/loader.js:700:10)
    at Module.load (internal/modules/cjs/loader.js:599:32)
    at tryModuleLoad (internal/modules/cjs/loader.js:538:12)
    at Function.Module._load (internal/modules/cjs/loader.js:530:3)
    at Module.require (internal/modules/cjs/loader.js:637:17)
    at require (internal/modules/cjs/helpers.js:22:18)

TO FIX:

To address this, I believe it is caused by the web-server container building nodejs version 10.x.x ( see this issue: https://github.com/RobotWebTools/ros2-web-bridge/issues/172)

I therefore changed line 11 in "Dockerfile.ros2_web_bridge" to:

curl -sL https://deb.nodesource.com/setup_12.x -o nodesource_setup.sh && \

I then rebuilt the container, started it, and now I have a working connection!

Suggest taking a look at this and updating the repo to address this.

Cheers!

jackpien commented 3 years ago

Hi @agillies8 - thanks or catching this!

I have not verified the problem yet (since I tend to not rebuild my images often).

But if you have the hadabot_main repo forked and are comfortable with pull requests, perhaps make your suggested change above and send me a pull request for that change.

Thanks! Jack

jackpien commented 3 years ago

@agillies8 - never mind! I added the fix already.

If you find any other problems, please don't hesitate to file an issue.

Thanks! Jack