Offline Cluster 1 - Pull images from the proxy registry

offline_pull_images

#!/bin/bash

echo "If you want to make quay.io/coreos/flannel:v0.11.0-amd64 available in the machine :"
echo "- Example Run : ${0} quay.io/coreos/flannel/v0.11.0-amd64"
echo "- Example Run : ${0} myapp-pod.yaml "
echo "- Example Run : ${0} http://some.thing/myapp-pod.yaml "

private_registry=${2}
regex_remote='^(https?|ftp)://[-A-Za-z0-9\+&@#/%?=~_|!:,.;]*[-A-Za-z0-9\+&@#/%=~_|]\.[-A-Za-z0-9\+&@#/%?=~_|!:,.;]*[-A-Za-z0-9\+&@#/%=~_|]$'

# ---- functions ---

function from_imagename
{
   # trim spaces
  
  public_image=${1//[[:space:]]/}
  # remove everything after first slash, and remove everything after colon
  public_hostname=$(echo ${1} | sed 's@/.*@@g' | sed 's@:.*@@g');
  if [[ "${public_hostname}" != *"."* ]]; then
    IS_DOCKERHUB="YES"
    public_image_hub=${public_image}
    public_image=docker.io/${public_image_hub}
  else
    IS_DOCKERHUB="NO"
  fi

  private_image=$(echo ${public_image} | sed 's@.*/@'"$private_registry"'/@g')

  docker pull ${private_image}
  docker tag ${private_image} ${public_image}
  if [ "${IS_DOCKERHUB}" = "YES" ]; then
    docker tag ${private_image} ${public_image_hub}
  fi
}


function from_remote
{
  curl ${1} | grep image: | sed 's/.*image://g' | while read -r pub_image ; do
    from_imagename ${pub_image}
  done
}

function from_localfile
{
  cat ${1} | grep image: | sed 's/.*image://g' | while read -r pub_image ; do
   
    from_imagename ${pub_image}


  done
}

#----- main 

if [[ $1 =~ $regex_remote ]] ;
then
  from_remote ${1}
elif [[ -f ${1} ]];
then
  from_localfile ${1}
else
  from_imagename ${1}
fi

z.examples.md

proxy_registry=nexus.company.com

pull image from docker.io using proxy registry

offline_pull_images alpine:3.11 $proxy_registry

pull image from quay.io using proxy registry

offline_pull_images quay.io/coreos/flannel/v0.11.0-amd64 $proxy_registry

pull all images mentioned in the local YAML file using proxy registry

offline_pull_images ./deployment.yaml $proxy_registry

pull all images mentioned in the remote YAML file using proxy registry

offline_pull_images  https://docs.projectcalico.org/manifests/calico.yaml $proxy_registry