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docker-proxy

See original GitHub issue

Ubuntu 18.04.1 microk8s: v1.12.2 (266)

I was trying to docker-compose up -d a Wordpress service with a port forward, using the microk8s docker and the exported DOCKER_HOST, but it failed:

driver failed programming external connectivity on endpoint hs-subscriptions_wordpress_1
(2b0dae5c331d1cf6a67c6b839631bdcd430c1cb756309f8a6d18c2cf5e98f46b): Error starting userland proxy:

This led me to discovering that /snap/microk8s/current/usr/bin/docker-proxy throws a segmentation fault (core dumped). dmesg shows:

docker-proxy[6615]: segfault at 400318 ip 00007f3d759db949 sp 00007ffc0c293a90 error 7 in ld-2.23.so[7f3d759d8000+26000]

This might be related to issue #152, but I’m not familiar enough with how docker-proxy should work in this context.

Issue Analytics

State:
Created 5 years ago
Reactions:2
Comments:10 (3 by maintainers)

Top GitHub Comments

2reactions

calohmncommented, Jan 18, 2019

@xgenvn I’ve used the docker-proxy contained in https://download.docker.com/linux/static/stable/x86_64/docker-18.06.1-ce.tgz (Ie. I’ve not installed the docker package but instead have just extracted this one file from the above archive.)

2reactions

calohmncommented, Jan 17, 2019

We experienced the same issue with 1.13.2/edge (383) on Ubuntu 18.04, getting Failed to allocate and map port: Error starting userland proxy: , retry: 1 errors when using the microk8s docker.

As a workaround, we found that the “userland proxy” can either be deactivated or a path to a separate docker-proxy binary can be set.

That would be editing /var/snap/microk8s/current/args/docker-daemon.json and using either

{
  "insecure-registries" : ["localhost:32000"],
  "userland-proxy-path": "/path/to/separately/downloaded/docker-proxy"
}

{
  "insecure-registries" : ["localhost:32000"],
  "userland-proxy": false
}

(Note there might still be an issue with disabling the userland-proxy (see https://github.com/moby/moby/issues/14856).)

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