#!/bin/bash
-set -e
+# This script is called by arv-migrate-docker19 to perform the actual migration
+# of a single image. This works by running Docker-in-Docker (dnd.sh) to
+# download the image using Docker 1.9 and then upgrading to Docker 1.13 and
+# uploading the converted image.
+
+# When using bash in pid 1 and using "trap on EXIT"
+# it will sometimes go into an 100% CPU infinite loop.
+#
+# Using workaround from here:
+#
+# https://github.com/docker/docker/issues/4854
+if [ "$$" = 1 ]; then
+ $0 "$@"
+ exit $?
+fi
+
+# -x show script
+# -e exit on error
+# -o pipefail use exit code from 1st failure in pipeline, not last
+set -x -e -o pipefail
+image_tar_keepref=$1
+image_id=$2
+image_repo=$3
+image_tag=$4
+project_uuid=$5
+graph_driver=$6
+
+if [[ "$image_repo" = "<none>" ]] ; then
+ image_repo=none
+ image_tag=latest
+fi
+
+# Print free space in /var/lib/docker
+function freespace() {
+ df -B1 /var/lib/docker | tail -n1 | sed 's/ */ /g' | cut -d' ' -f4
+}
+
+# Run docker-in-docker script and then wait for it to come up
function start_docker {
- /root/dnd.sh &
+ /root/dnd.sh $graph_driver &
for i in $(seq 1 10) ; do
if docker version >/dev/null 2>/dev/null ; then
return
false
}
+# Kill docker from pid then wait for it to be down
function kill_docker {
if test -f /var/run/docker.pid ; then
kill $(cat /var/run/docker.pid)
false
}
+# Ensure that we clean up docker graph and/or lingering cache files on exit
function cleanup {
kill_docker
rm -rf /var/lib/docker/*
rm -rf /root/.cache/arvados/docker/*
+ echo "Available space after cleanup is $(freespace)"
}
trap cleanup EXIT
start_docker
-image_tar_keepref=$1
-image_id=$2
-image_repo=$3
-image_tag=$4
-project_uuid=$5
+echo "Initial available space is $(freespace)"
arv-get $image_tar_keepref | docker load
+
docker tag $image_id $image_repo:$image_tag
docker images -a
kill_docker
+echo "Available space after image load is $(freespace)"
+
cd /root/pkgs
dpkg -i libltdl7_2.4.2-1.11+b1_amd64.deb docker-engine_1.13.1-0~debian-jessie_amd64.deb
+echo "Available space after image upgrade is $(freespace)"
+
start_docker
docker images -a
+if [[ "$image_repo" = "none" ]] ; then
+ image_repo=$(docker images -a --no-trunc | sed 's/ */ /g' | grep ^none | cut -d' ' -f3)
+ image_tag=""
+fi
+
UUID=$(arv-keepdocker --force-image-format --project-uuid=$project_uuid $image_repo $image_tag)
+echo "Available space after arv-keepdocker is $(freespace)"
+
echo "Migrated uuid is $UUID"