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#! /bin/bash
# Copyright (c) 2021 Cisco and/or its affiliates.
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at:
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
set -euo pipefail
shopt -s extglob
# Log all output to stdout & stderr to a log file
logname="/tmp/$(basename $0).$(date -u +%Y_%m_%d_%H%M%S).log"
echo -e "\n*** Logging output to $logname ***\n"
exec > >(tee -a $logname) 2>&1
export CIMAN_DOCKER_SCRIPTS=${CIMAN_DOCKER_SCRIPTS:-"$(dirname $BASH_SOURCE)"}
. "$CIMAN_DOCKER_SCRIPTS/lib_common.sh"
# Global variables
long_bar="################################################################"
short_bar="-----"
image_not_found=""
image_user=""
image_repo=""
image_version=""
image_arch=""
image_name_prod=""
image_name_prev=""
image_name_new=""
image_realname=""
image_realname_prod=""
image_realname_prev=""
image_tags=""
image_tags_prod=""
image_tags_prev=""
image_tags_new=""
docker_id_prod=""
docker_id_prev=""
docker_id_new=""
digest_prod=""
digest_prev=""
digest_new=""
restore_cmd=""
usage() {
local script="$(basename $0)"
echo
echo "Usage: $script r[evert] <prod image>"
echo " $script p[romote] <new image> [<new image>]"
echo " $script i[nspect] <prod image>"
echo
echo " revert: swaps 'prod-<arch>' and 'prod-prev-<arch>' images"
echo " <prod image>: e.g. fdiotools/builder-ubuntu1804:prod-x86_64"
echo
echo " promote: moves 'prod-<arch>' image to 'prod-prev-<arch>' tag and"
echo " tags <new image> with 'prod-<arch>'"
echo " <new image>: e.g. fdiotools/builder-ubuntu1804:2020_09_23_151655-x86_64"
echo " inspect: prints out all tags for prod-<arch> and prod-prev-<arch>"
echo
exit 1
}
echo_restore_cmd() {
echo -e "\n$long_bar\n"
echo "To restore tags to original state, issue the following command:"
echo -e "\n$restore_cmd\n\n$long_bar\n"
}
push_to_dockerhub() {
echo_restore_cmd
for image in "$@" ; do
set +e
echo "Pushing '$image' to docker hub..."
if ! docker push "$image" ; then
echo "ERROR: 'docker push $image' failed!"
exit 1
fi
done
}
parse_image_name() {
image_user="$(echo $1 | cut -d'/' -f1)"
image_repo="$(echo $1 | cut -d'/' -f2 | cut -d':' -f1)"
local tag="$(echo $1 | cut -d':' -f2)"
image_version="$(echo $tag | cut -d'-' -f1)"
image_arch="$(echo $tag | sed -e s/$image_version-//)"
image_name_new="${image_user}/${image_repo}:${image_version}-${image_arch}"
if [ "$1" != "$image_name_new" ] ; then
echo "ERROR: Image name parsing failed: $1 != '$image_name_new'"
usage
fi
if [[ "$image_version" =~ "prod" ]] ; then
image_name_new=""
fi
image_name_prod="${image_user}/${image_repo}:prod-${image_arch}"
image_name_prev="${image_user}/${image_repo}:prod-prev-${image_arch}"
}
format_image_tags() {
# Note: 'grep $image_arch' & grep -v 'prod-curr' is required due to a
# bug in docker hub which returns old tags which were deleted via
# the webUI, but are still retrieved by 'docker pull -a'
image_tags="$(docker images | grep $1 | grep $image_arch | grep -v prod-curr | sort -r | mawk '{print $1":"$2}' | tr '\n' ' ')"
image_realname="$(docker images | grep $1 | grep $image_arch | sort -r | grep -v prod | mawk '{print $1":"$2}' || true)"
if [ -z "${image_realname:-}" ] ; then
image_realname="$image_tags"
fi
}
get_image_id_tags() {
for image in "$image_name_new" "$image_name_prod" "$image_name_prev" ; do
if [ -z "$image" ] ; then
continue
fi
# ensure image exists
set +e
local image_found="$(docker images | mawk '{print $1":"$2}' | grep $image)"
set -e
if [ -z "$image_found" ] ; then
if [ "$image" = "$image_name_prev" ] ; then
if [ "$action" = "revert" ] ; then
echo "ERROR: Image '$image' not found!"
echo "Unable to revert production image '$image_name_prod'!"
usage
else
continue
fi
else
echo "ERROR: Image '$image' not found!"
usage
fi
fi
set +e
local id="$(docker image inspect $image | mawk -F':' '/Id/{print $3}')"
local digest="$(docker image inspect $image | grep -A1 RepoDigests | grep -v RepoDigests | mawk -F':' '{print $2}')"
local retval="$?"
set -e
if [ "$retval" -ne "0" ] ; then
echo "ERROR: Docker ID not found for '$image'!"
usage
fi
if [ "$image" = "$image_name_prod" ] ; then
docker_id_prod="${id::12}"
digest_prod="${digest::12}"
format_image_tags "$docker_id_prod"
image_tags_prod="$image_tags"
if [ -z "$image_realname_prod" ] ; then
image_realname_prod="$image_realname"
fi
elif [ "$image" = "$image_name_prev" ] ; then
docker_id_prev="${id::12}"
digest_prev="${digest::12}"
format_image_tags "$docker_id_prev"
image_tags_prev="$image_tags"
if [ -z "$image_realname_prev" ] ; then
image_realname_prev="$image_realname"
fi
else
docker_id_new="${id::12}"
digest_new="${digest::12}"
format_image_tags "$docker_id_new" "NEW"
image_tags_new="$image_tags"
fi
done
if [ -z "$restore_cmd" ] ; then
restore_cmd="sudo $0 p $image_realname_prev $image_realname_prod"
fi
}
get_all_tags_from_dockerhub() {
local dh_repo="$image_user/$image_repo"
echo -e "Pulling all tags from docker hub repo '$dh_repo':\n$long_bar"
if ! docker pull -a "$dh_repo" ; then
echo "ERROR: Repository '$dh_repo' not found on docker hub!"
usage
fi
echo "$long_bar"
}
verify_image_version_date_format() {
version="$1"
# TODO: Remove regex1 when legacy nomenclature is no longer on docker hub.
local regex1="^[0-9]{4}_[0-1][0-9]_[0-3][0-9]_[0-2][0-9][0-5][0-9][0-5][0-9]$"
local regex2="^[0-9]{4}_[0-1][0-9]_[0-3][0-9]_[0-2][0-9][0-5][0-9][0-5][0-9]_UTC$"
if [[ "$version" =~ $regex1 ]] || [[ "$version" =~ $regex2 ]]; then
return 0
fi
return 1
}
verify_image_name() {
image_not_found=""
# Invalid user
if [ "$image_user" != "fdiotools" ] ; then
image_not_found="true"
echo "ERROR: invalid user '$image_user' in '$image_name_new'!"
fi
# Invalid version
if [ -z "$image_not_found" ] \
&& [ "$image_version" != "prod" ] \
&& ! verify_image_version_date_format "$image_version" ]] ; then
image_not_found="true"
echo "ERROR: invalid version '$image_version' in '$image_name_new'!"
fi
# Invalid arch
if [ -z "$image_not_found" ] \
&& ! [[ "$EXECUTOR_ARCHS" =~ .*"$image_arch".* ]] ; then
image_not_found="true"
echo "ERROR: invalid arch '$image_arch' in '$image_name_new'!"
fi
if [ -n "$image_not_found" ] ; then
echo "ERROR: Invalid image '$image_name_new'!"
usage
fi
}
docker_tag_image() {
echo ">>> docker tag $1 $2"
set +e
docker tag "$1" "$2"
local retval="$?"
set -e
if [ "$retval" -ne "0" ] ; then
echo "WARNING: 'docker tag $1 $2' failed!"
fi
}
docker_rmi_tag() {
set +e
echo ">>> docker rmi $1"
docker rmi "$1"
local retval="$?"
set -e
if [ "$retval" -ne "0" ] ; then
echo "WARNING: 'docker rmi $1' failed!"
fi
}
print_image_list() {
if [ -z "$2" ] ; then
echo "$1 Image Not Found"
return
fi
echo "$1 (Id $2, Digest $3):"
for image in $4 ; do
echo -e "\t$image"
done
}
inspect_images() {
echo -e "\n${1}Production Docker Images:"
echo "$short_bar"
if [ -n "$image_tags_new" ] ; then
print_image_list "NEW" "$docker_id_new" "$digest_new" "$image_tags_new"
echo
fi
print_image_list "prod-$image_arch" "$docker_id_prod" "$digest_prod" \
"$image_tags_prod"
echo
print_image_list "prod-prev-$image_arch" "$docker_id_prev" "$digest_prev" \
"$image_tags_prev"
echo -e "$short_bar\n"
}
revert_prod_image() {
inspect_images "EXISTING "
docker_tag_image "$docker_id_prod" "$image_name_prev"
docker_tag_image "$docker_id_prev" "$image_name_prod"
get_image_id_tags
inspect_images "REVERTED "
local yn=""
while true; do
read -p "Push Reverted tags to '$image_user/$image_repo' (yes/no)? " yn
case ${yn:0:1} in
y|Y )
break ;;
n|N )
echo -e "\nABORTING REVERT!\n"
docker_tag_image $docker_id_prev $image_name_prod
docker_tag_image $docker_id_prod $image_name_prev
get_image_id_tags
inspect_images "RESTORED LOCAL "
exit 1 ;;
* )
echo "Please answer yes or no." ;;
esac
done
echo
push_to_dockerhub $image_name_prev $image_name_prod
inspect_images ""
echo_restore_cmd
}
promote_new_image() {
inspect_images "EXISTING "
docker_tag_image "$docker_id_prod" "$image_name_prev"
docker_tag_image "$docker_id_new" "$image_name_prod"
get_image_id_tags
inspect_images "PROMOTED "
local yn=""
while true; do
read -p "Push promoted tags to '$image_user/$image_repo' (yes/no)? " yn
case "${yn:0:1}" in
y|Y )
break ;;
n|N )
echo -e "\nABORTING PROMOTION!\n"
docker_tag_image "$docker_id_prev" "$image_name_prod"
local restore_both="$(echo $restore_cmd | mawk '{print $5}')"
if [[ -n "$restore_both" ]] ; then
docker_tag_image "$image_realname_prev" "$image_name_prev"
else
docker_rmi_tag "$image_name_prev"
image_name_prev=""
docker_id_prev=""
fi
get_image_id_tags
inspect_images "RESTORED "
exit 1 ;;
* )
echo "Please answer yes or no." ;;
esac
done
echo
push_to_dockerhub "$image_name_new" "$image_name_prev" "$image_name_prod"
inspect_images ""
echo_restore_cmd
}
must_be_run_as_root_or_docker_group
# Validate arguments
num_args="$#"
if [ "$num_args" -lt "1" ] ; then
usage
fi
action=""
case "$1" in
r?(evert))
action="revert"
if [ "$num_args" -ne "2" ] ; then
echo "ERROR: Invalid number of arguments: $#"
usage
fi ;;
p?(romote))
if [ "$num_args" -eq "2" ] || [ "$num_args" -eq "3" ] ; then
action="promote"
else
echo "ERROR: Invalid number of arguments: $#"
usage
fi ;;
i?(nspect))
action="inspect"
if [ "$num_args" -ne "2" ] ; then
echo "ERROR: Invalid number of arguments: $#"
usage
fi ;;
*)
echo "ERROR: Invalid option '$1'!"
usage ;;
esac
shift
docker login >& /dev/null
# Update local tags
tags_to_push=""
for image in "$@" ; do
parse_image_name "$image"
verify_image_name "$image"
get_all_tags_from_dockerhub
get_image_id_tags
if [ "$action" = "promote" ] ; then
if [ -n "$image_name_new" ] ; then
promote_new_image
else
echo "ERROR: No new image specified to promote!"
usage
fi
elif [ "$action" = "revert" ] ; then
if [ "$image_version" = "prod" ] ; then
revert_prod_image
else
echo "ERROR: Non-production image '$image' specified!"
usage
fi
else
if [ "$image_version" = "prod" ] ; then
inspect_images ""
else
echo "ERROR: Non-production image '$image' specified!"
usage
fi
fi
done
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