How can I setup a proxy in a Selenium Chrome container? - selenium

Question

I have a docker-compose.yml file with well-known environment variables to reach our corporate proxy:
---
version: '2.2'
# adapted from:
# https://github.com/SeleniumHQ/docker-selenium/wiki/Getting-Started-with-Docker-Compose
# docker-compose --force-recreate
services:
chrome:
privileged: True
image: "selenium/standalone-chrome:3.11.0"
ports:
- "4444:4444"
volumes:
- /dev/shm:/dev/shm
environment:
- TZ="UT"
- http_proxy=http://proxy.lan:8080
- https_proxy=http://proxy.lan:8080
- no_proxy=
#- SE_OPTS=-Dhttp.proxyHost=proxy.lan -Dhttp.proxyPort=8080
network_mode: host
When I run wget in the container, then the proxy is used as expected.
--2018-05-02 12:30:45-- http://google.com/
Resolving proxy.lan (proxy.lan)... 192.168.33.141
Connecting to proxy.lan (proxy.lan)|192.168.33.141|:8080... connected.
Proxy request sent, awaiting response... 301 Moved Permanently
Location: http://www.google.com/ [following]
--2018-05-02 12:30:45-- http://www.google.com/
Reusing existing connection to proxy.lan:8080.
Proxy request sent, awaiting response... 200 OK
Length: unspecified [text/html]
Saving to: ‘/dev/null’
/dev/null [ <=> ] 10.81K --.-KB/s in 0s
2018-05-02 12:30:46 (310 MB/s) - ‘/dev/null’ saved [11073]
However, when I try to run the container with SE_OPTS="-Dhttp.proxyHost=proxy.lan -Dhttp.proxyPort=8080", then I see a stacktrace:
Exception in thread "main" com.beust.jcommander.ParameterException: Was passed main parameter '"-Dhttp.proxyHost=proxy.lan' but no main parameter was defined in your arg class.
There is an unmerged PR, but I fear the urgency to use a proxy in testing in corporate environment might not be felt by the Se dev. Maybe there is an alternative solution.