keyserver setup issue for installing `docker-engine`

[chenrui333]

Looks like there are lots of keyserver import issue, see log below in travis build:

Preparing to unpack .../apt-transport-https_1.4.9_amd64.deb ...
Unpacking apt-transport-https (1.4.9) ...
Setting up apt-transport-https (1.4.9) ...
Warning: apt-key output should not be parsed (stdout is not a terminal)
Executing: /tmp/apt-key-gpghome.b5LPNfy70Z/gpg.1.sh --keyserver hkp://p80.pool.sks-keyservers.net:80 --recv-keys 58118E89F3A912897C070ADBF76221572C52609D
gpg: keyserver receive failed: Cannot assign requested address
The command '/bin/sh -c apt-get update &&
apt-get install -y make apt-transport-https ca-certificates &&
apt-key adv --keyserver hkp://p80.pool.sks-keyservers.net:80       --recv-keys 58118E89F3A912897C070ADBF76221572C52609D &&
echo "deb https://apt.dockerproject.org/repo debian-jessie main"       > /etc/apt/sources.list.d/docker.list &&
apt-get update && apt-get install -y docker-engine=$DOCKER_VERSION' returned a non-zero code: 2
make: *** [component-test] Error 2
The command "make publish" exited with 2.

Tried with gist comment, but still failed locally:

gpg: directory '/root/.gnupg' created
gpg: keybox '/root/.gnupg/pubring.kbx' created
gpg: keyserver receive failed: No data
The command '/bin/sh -c apt-get update &&     apt-get install -y make apt-transport-https ca-certificates &&     gpg --keyserver pgpkeys.mit.edu --recv-key  F76221572C52609D &&     gpg -a --export F76221572C52609D | sudo apt-key add - &&     echo "deb https://apt.dockerproject.org/repo debian-jessie main"       > /etc/apt/sources.list.d/docker.list &&     apt-get update && apt-get install -y docker-engine=$DOCKER_VERSION' returned a non-zero code: 2
make: *** [component-test] Error 2

[chenrui333]

The travis build has been restarted several times, but still failing for the same reason.