wget installation does not work on Alpine

Steps to reproduce

$ docker run -it mhart/alpine-node:6 sh
# wget -O /usr/local/bin/dumb-init https://github.com/Yelp/dumb-init/releases/download/v1.0.1/dumb-init_1.0.1_amd64

Expected result

dumb-init is installed, as it happens when using the ubuntu container, e.g…

Actual result

An error message is returned by wget:

Connecting to github.com (192.30.252.120:443) wget: can’t execute ‘ssl_helper’: No such file or directory wget: error getting response: Connection reset by peer

Any thoughts on this?

[mikecroft]

FYI for others coming across this, adding the above commands to my Dockerfile did not work, I needed to specifically add the ca-certificates to wget like this:

 RUN   apk update \                                                                                                                                                                                                                        
  &&   apk add ca-certificates wget \                                                                                                                                                                                                      
  &&   update-ca-certificates    

that worked perfectly and my image built with no problems.

[goloroden]

Okay, forget it … it was a problem with the CA certificates on Alpine Linux. You need to run

# apk update
# apk add ca-certificates
# update-ca-certificates

before running wget, then it works 😃