Re: [Bug-wget] Anyone want to add libcares support to wget?

[Giuseppe Scrivano]

Hi Ben,

Ben Greear <address@hidden> writes:

>> Did you consider using a container (e.g. docker) for such a task ? Easy to 
>> set
>> up and you'll have your feature not only for wget. IMO, that is much more
>> flexible. (It was Giuseppe's idea during a private talk).
>
> Containers will not work for me.  I need to scale to thousands of
> instances on modest hardware.  I'm certain the libcares and binding
> approach will work because we do similar things with curl and other
> programs already.

how modest is this hardware?

I tried to build a minimal Docker container for wget on top of Alpine:

Dockerfile:

FROM alpine
RUN apk add --update wget
WORKDIR /out
ENTRYPOINT ["/usr/bin/wget"]

and simply running (192.168.1.13 is an internal DNS server):

docker run --dns=192.168.1.13 --rm -v $(pwd):/out:Z wget wdserver

takes around 5M, plus the docker daemon.

If this is not enough, you can even just run wget in a chroot, and
provide a different /etc/resolv.conf.

Cheers,
Giuseppe