Failed to pull a docker image using singularity

[biozzq]

Dear all,

I use following code to download the image, but I always receive these errors. Any suggestions will be appreciated. Thank you.

VERSION="0.4.2";
URL="docker://visze/mprasnakeflow:${VERSION}";
IMAGE_NAME=`echo -n "${URL}" | md5sum | awk '{print $1".simg"}'`
singularity pull --name $IMAGE_NAME $URL

FATAL:   While making image from oci registry: error fetching image to cache: failed to get checksum for docker://visze/mprasnakeflow:0.4.2: error pinging docker registry registry-1.docker.io: Get "https://registry-1.docker.io/v2/": dial tcp 162.125.32.6:443: i/o timeout

Best wishes,
Zheng zhuqing