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|
#!/bin/sh
set -e
STATE="$1"
FILES="$2"
prev_containers_file="$FILES"/tmp/prev_containers.list
case "$STATE" in
NeedsArtifactReboot)
echo "No"
;;
SupportsRollback)
echo "Yes"
;;
Download)
command -v docker >/dev/null 2>&1 || { echo >&2 "ERROR: Must have docker installed to run this update module."; exit 1; }
;;
ArtifactInstall)
>&2 echo "Storing reference on running containers for rollback needs to $prev_containers_file"
docker ps -q > $prev_containers_file
>&2 echo "Stopping all running containers"
[ -n "$(cat $prev_containers_file)" ] && docker stop $(cat $prev_containers_file)
run_args=$(jq -r ".run_args | select (.!=null)" "$FILES"/header/meta-data)
for container in $(jq -r ".containers[]" "$FILES"/header/meta-data); do
>&2 echo "Pulling new container [$container]"
docker pull $container
>&2 echo "Starting new container [$container] with args [${run_args}]"
docker run -dt ${run_args} $container
done
;;
ArtifactRollback)
>&2 echo "Container update rollback started"
[ -f $prev_containers_file ] || (>&2 echo "ERROR: Failed to find rollback reference file [$prev_containers_file]" && exit 1)
>&2 echo "Stopping all running containers"
[ -n "$(docker ps -q)" ] && docker stop $(docker ps -q)
>&2 echo "Starting containers running prior to the update"
[ -n "$(cat $prev_containers_file)" ] && docker start $(cat $prev_containers_file)
;;
esac
exit 0
|
