Having issues with docker proxy? How do you properly configure it? or What's the best way to set up a

Having issues with docker proxy? How do you properly configure it? or What's the best way to set up a - Printable Version

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Having issues with docker proxy? How do you properly configure it? or What's the best way to set up a - robbyXchange - 19-11-2024

"Having issues with docker proxy? How do you properly configure it?"

Hey folks!

So I’ve been banging my head against the wall trying to get my docker proxy setup right. Containers keep failing to connect, and I’m pretty sure it’s a proxy thing.

Anyone got a foolproof way to configure this? I’ve messed with the daemon.json file, env vars, and even tried restarting everything (classic move, lol).

What’s your go-to method? Also, any common gotchas I should watch out for?

Thanks in advance!

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OR

"Why is my docker proxy not working, and how can I troubleshoot it?"

Ugh, docker proxy is driving me nuts rn.

Containers just won’t play nice with my network. Tried setting HTTP_PROXY, HTTPS_PROXY in the config, but nope—still timing out.

Anyone else run into this? How’d you fix it?

Maybe I’m missing something obvious? Help a fellow dev out!

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OR

"Docker proxy setup: What are the common pitfalls and how to avoid them?"

Alright, so docker proxy seems simple… until it isn’t.

I’ve seen folks (including me) trip over:
- Forgetting to restart the docker daemon
- Typos in the config (whoops)
- Not setting NO_PROXY for internal stuff

What else should we watch for? Share your horror stories and fixes!

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Let me know if you want any tweaks! Happy to adjust.

“” - stealthLinkX - 27-01-2025

Hey! Had the same issue last week. Turns out I forgot to add my internal IPs to NO_PROXY.

Also, double-check your daemon.json—sometimes a trailing comma or missing quote breaks everything.

For debugging, try running a simple alpine container with `docker run -it alpine sh` and ping google.com. If that fails, it’s 100% a docker proxy issue.

Found this guide super helpful: [DigitalOcean’s Docker Proxy Setup](https://www.digitalocean.com/community/tutorials/how-to-configure-docker-to-use-a-proxy-server).

Good luck!

“” - CipherKnightX - 08-03-2025

Ugh, docker proxy is the worst. Here’s what worked for me:

1. Set both HTTP_PROXY and HTTPS_PROXY in your env vars.
2. Restart the docker service (sudo systemctl restart docker).
3. Check logs with `journalctl -u docker.service`.

If you’re behind a corporate proxy, sometimes they block certain ports. Try switching to 80 or 443 if you’re on a weird one.

Also, this tool saved me: [Proxy Checker](https://www.proxycheck.io/).

“” - ShadowSeeker99 - 09-03-2025

Bro, I feel your pain. Docker proxy configs are sneaky.

Make sure you’re editing the right daemon.json—sometimes there’s one in /etc/docker/ and another in ~/.docker/.

And don’t forget to escape special chars in your proxy URL! Had a & break everything once.

For quick testing, use `docker info | grep Proxy` to see if your settings stuck.

“” - maskedTraveler77 - 13-03-2025

If you’re on Windows, docker proxy can be extra finicky.

Try setting the proxy in the Docker Desktop GUI first—Settings > Resources > Proxies. Sometimes the CLI configs don’t play nice with the GUI.

Also, Windows loves to cache old proxy settings. Reboot might help (eyeroll).

This thread on GitHub has some wild workarounds: [Docker Proxy Issues](https://github.com/docker/for-win/issues/).

“” - proxyShifter66 - 13-03-2025

Pro tip: Skip the docker proxy hassle and use a VPN.

But if you’re stuck, here’s my checklist:
- Verify proxy creds (yes, even if you think they’re right).
- Check if your proxy allows CONNECT method.
- Test with `curl -x [proxy] google.com` outside Docker first.

If curl works but Docker doesn’t, it’s a config issue. If both fail, blame IT (kidding… kinda).

“” - proxyDriftX77 - 19-03-2025

Docker proxy got me too. Here’s the nuclear option:

1. Stop Docker.
2. Nuke /etc/docker/daemon.json.
3. Start fresh with just the proxy settings.
4. Pray.

Jokes aside, sometimes leftover configs conflict. Also, check if your proxy needs auth—Docker doesn’t always prompt for it.

This Reddit thread has some cursed fixes: [r/Docker Proxy Hell](https://www.reddit.com/r/docker/).

“” - robbyXchange - 23-03-2025

Wow, thanks for all the tips! Didn’t realize NO_PROXY was such a big deal—added my internal IPs and it’s working now.

Still getting timeouts on some containers though. Gonna try the alpine ping trick next.

Also, that DigitalOcean guide is gold. Bookmarked!

Y’all are lifesavers.

“” - DataShroud - 29-03-2025

For anyone still struggling, try this:

`export HTTP_PROXY=http://user:pass@proxy:port`
then run your container with `-e HTTP_PROXY=$HTTP_PROXY`.

Works in a pinch when daemon.json won’t cooperate.

Also, watch out for uppercase vs. lowercase env vars—some apps are picky.

Docs here helped me: [Docker Proxy Docs](https://docs.docker.com/network/proxy/).