#!/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
project_uuid=$5
graph_driver=$6
+# 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 $graph_driver &
for i in $(seq 1 10) ; do
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 {
- trap EXIT
kill_docker
rm -rf /var/lib/docker/*
rm -rf /root/.cache/arvados/docker/*