mysql 5.7 Docker build fails

[bentito]

I am running it on MacOS, but I don't think that matters.

Steps to reproduce:

Download mysql Docker file: https://github.com/docker-library/mysql/blob/9d1f62552b5dcf25d3102f14eb82b579ce9f4a26/5.7/Dockerfile ;
Run build. For instance: docker build -t mysql-prod -f Dockerfile . ;
Build ends in error:

Step 8/18 : RUN set -ex; 	key='A4A9406876FCBD3C456770C88C718D3B5072E1F5'; 	export GNUPGHOME="$(mktemp -d)"; 	gpg --keyserver ha.pool.sks-keyservers.net --recv-keys "$key"; 	gpg --export "$key" > /etc/apt/trusted.gpg.d/mysql.gpg; 	gpgconf --kill all; 	rm -rf "$GNUPGHOME"; 	apt-key list > /dev/null
 ---> Running in 9ea3bbeff7aa
+ key=A4A9406876FCBD3C456770C88C718D3B5072E1F5
+ mktemp -d
+ export GNUPGHOME=/tmp/tmp.Pdp6bvC8iI
+ gpg --keyserver ha.pool.sks-keyservers.net --recv-keys A4A9406876FCBD3C456770C88C718D3B5072E1F5
gpg: keybox '/tmp/tmp.Pdp6bvC8iI/pubring.kbx' created
gpg: keyserver receive failed: Cannot assign requested address
The command '/bin/sh -c set -ex; 	key='A4A9406876FCBD3C456770C88C718D3B5072E1F5'; 	export GNUPGHOME="$(mktemp -d)"; 	gpg --keyserver ha.pool.sks-keyservers.net --recv-keys "$key"; 	gpg --export "$key" > /etc/apt/trusted.gpg.d/mysql.gpg; 	gpgconf --kill all; 	rm -rf "$GNUPGHOME"; 	apt-key list > /dev/null' returned a non-zero code: 2

[yosifkit]

This happens all the time. See docker-library/php#666 for how we combat this for TravisCI builds and on the official-images build servers. Without a MITM proxy, then the solution is to repeat the build multiple times or add extra gpg servers to hit.