Skip to main content

Fail to run docker hello world

After docker installed, it is recommended to check it with below command:

sudo docker run hello-world

When it fails to run, it might be a missing proxy configuration. Docker has its own proxy configuration and it does not use http_proxy variable.

Define docker proxy:

Edit etc/systemd/system/docker.service.d/http-proxy.conf and add proxy under [Service] section:


Environment="http_proxy=http://PROXY_MACHINE_REAL_NAME:8080" "https_proxy=http://PROXY_MACHINE_REAL_NAME:8080" "no_proxy=,localhost,mydyumserver"


Popular posts from this blog

Jenkins error: groovy.lang.MissingPropertyException

I tried to run groovy build step and got below error. This post will describe how I solved the problem.

Caught: groovy.lang.MissingPropertyException: No such property: hudson for class: script

What is PKI

PKI = Public Key Infrastructure
(Resource) Method of asserting the identity and validity of a person (or entity) that you have not previously met or interacted.

It use of certificates containing identifying information and public keys (these certificates are more properly called X.509 certificates).

PKI accomplishes this by defining a central authority who is mutually trusted by all users of the system.