Proxy Guide

General Environment Proxy Configuration

Gets loaded as environment variables by processes.

cat >> /etc/environment<< EOF
#Proxies for LR1
http_proxy="http://proxy.houston.hpecorp.net:8080/"
https_proxy="http://proxy.houston.hpecorp.net:8080/"
ftp_proxy="http://proxy.houston.hpecorp.net:8080/"
EOF
Lower Upper Description Example

http_proxy

HTTP_PROXY

Proxy to use for http traffic

http_proxy=http://proxy.houston.hpecorp.net:8080

https_proxy

HTTPS_PROXY

Proxy to use for https traffic

https_proxy=http://proxy.houston.hpecorp.net:8080

no_proxy

NO_PROXY

Do not use the proxy for these hostnames and IPs

no_proxy=.us.cray.com,.hpe.com

The no_proxy variants tend to work based on string-based suffix matching. If your no_proxy is set to .cray.com, then requests to foo.cray.com will not use the configured proxy. Suffix matching works great for DNS names, but does not work well for IP addresses. If you have a whole subnet for which you do not want to use the proxy (e.g., 192.168.1.0/24), then you must list out every IP address in no_proxy (192.168.1.1,192.168.1.2,…​192.168.1.254).

Some tools may use different environment variables or offer more powerful syntax in no_proxy. Again, there is no actual standard just a common convention. What works for one application may not work for another.

Process-specific Proxy Configurations

Docker systemd daemon

cat >> /etc/systemd/system/docker.service.d/http-proxy.conf << EOF
[Service]
Environment="HTTP_PROXY=http://proxy.houston.hpecorp.net:8080"
Environment="HTTPS_PROXY=http://proxy.houston.hpecorp.net:8080"
Environment="NO_PROXY=.us.cray.com"
EOF

Docker client

cat >> ~/.docker/config.json << EOF
{
 "proxies":
 {
   "default":
   {
     "httpProxy": "http://proxy.houston.hpecorp.net:8080",
     "httpsProxy": "http://proxy.houston.hpecorp.net:8080",
     "noProxy": ".us.cray.com"
   }
 }
}
EOF

DNF

cat >> /etc/dnf/dnf.conf << EOF
[main]
gpgcheck=1
installonly_limit=3
clean_requirements_on_remove=True
best=True
skip_if_unavailable=False
proxy=http://proxy.houston.hpecorp.net:8080
EOF