mirror of
https://github.com/offen/docker-volume-backup.git
synced 2024-11-12 17:50:27 +01:00
126 lines
4.1 KiB
Bash
126 lines
4.1 KiB
Bash
#!/bin/sh
|
|
|
|
# Copyright 2021 - Offen Authors <hioffen@posteo.de>
|
|
# SPDX-License-Identifier: MPL-2.0
|
|
|
|
# Portions of this file are taken from github.com/futurice/docker-volume-backup
|
|
# See NOTICE for information about authors and licensing.
|
|
|
|
source env.sh
|
|
|
|
function info {
|
|
echo -e "\n[INFO] $1\n"
|
|
}
|
|
|
|
info "Preparing backup"
|
|
DOCKER_SOCK="/var/run/docker.sock"
|
|
|
|
if [ -S "$DOCKER_SOCK" ]; then
|
|
TEMPFILE="$(mktemp)"
|
|
docker ps -q \
|
|
--filter "label=docker-volume-backup.stop-during-backup=$BACKUP_STOP_CONTAINER_LABEL" \
|
|
> "$TEMPFILE"
|
|
CONTAINERS_TO_STOP="$(cat $TEMPFILE | tr '\n' ' ')"
|
|
CONTAINERS_TO_STOP_TOTAL="$(cat $TEMPFILE | wc -l)"
|
|
CONTAINERS_TOTAL="$(docker ps -q | wc -l)"
|
|
rm "$TEMPFILE"
|
|
echo "$CONTAINERS_TOTAL containers running on host in total."
|
|
echo "$CONTAINERS_TO_STOP_TOTAL containers marked to be stopped during backup."
|
|
else
|
|
CONTAINERS_TO_STOP_TOTAL="0"
|
|
CONTAINERS_TOTAL="0"
|
|
echo "Cannot access \"$DOCKER_SOCK\", won't look for containers to stop."
|
|
fi
|
|
|
|
if [ "$CONTAINERS_TO_STOP_TOTAL" != "0" ]; then
|
|
info "Stopping containers"
|
|
docker stop $CONTAINERS_TO_STOP
|
|
fi
|
|
|
|
info "Creating backup"
|
|
BACKUP_FILENAME="$(date +"$BACKUP_FILENAME")"
|
|
tar -czvf "$BACKUP_FILENAME" $BACKUP_SOURCES # allow the var to expand, in case we have multiple sources
|
|
|
|
if [ ! -z "$GPG_PASSPHRASE" ]; then
|
|
info "Encrypting backup"
|
|
gpg --symmetric --cipher-algo aes256 --batch --passphrase "$GPG_PASSPHRASE" \
|
|
-o "${BACKUP_FILENAME}.gpg" $BACKUP_FILENAME
|
|
rm $BACKUP_FILENAME
|
|
BACKUP_FILENAME="${BACKUP_FILENAME}.gpg"
|
|
fi
|
|
|
|
if [ "$CONTAINERS_TO_STOP_TOTAL" != "0" ]; then
|
|
info "Starting containers/services back up"
|
|
# The container might be part of a stack when running in swarm mode, so
|
|
# its parent service needs to be restarted instead once backup is finished.
|
|
SERVICES_REQUIRING_UPDATE=""
|
|
for CONTAINER_ID in $CONTAINERS_TO_STOP; do
|
|
SWARM_SERVICE_NAME=$(
|
|
docker inspect \
|
|
--format "{{ index .Config.Labels \"com.docker.swarm.service.name\" }}" \
|
|
$CONTAINER_ID
|
|
)
|
|
if [ -z "$SWARM_SERVICE_NAME" ]; then
|
|
echo "Restarting $(docker start $CONTAINER_ID)"
|
|
else
|
|
echo "Removing $(docker rm $CONTAINER_ID)"
|
|
# Multiple containers might belong to the same service, so they will
|
|
# be restarted only after all names are known.
|
|
SERVICES_REQUIRING_UPDATE="${SERVICES_REQUIRING_UPDATE} ${SWARM_SERVICE_NAME}"
|
|
fi
|
|
done
|
|
|
|
if [ -n "$SERVICES_REQUIRING_UPDATE" ]; then
|
|
for SERVICE_NAME in $(echo -n "$SERVICES_REQUIRING_UPDATE" | tr ' ' '\n' | sort -u); do
|
|
docker service update --force $SERVICE_NAME
|
|
done
|
|
fi
|
|
fi
|
|
|
|
if [ ! -z "$AWS_S3_BUCKET_NAME" ]; then
|
|
info "Uploading backup to remote storage"
|
|
echo "Will upload to bucket \"$AWS_S3_BUCKET_NAME\"."
|
|
mc cp $MC_GLOBAL_OPTIONS "$BACKUP_FILENAME" "backup-target/$AWS_S3_BUCKET_NAME"
|
|
echo "Upload finished."
|
|
fi
|
|
|
|
if [ -f "$BACKUP_FILENAME" ]; then
|
|
info "Cleaning up"
|
|
rm -vf "$BACKUP_FILENAME"
|
|
fi
|
|
|
|
info "Backup finished"
|
|
echo "Will wait for next scheduled backup."
|
|
|
|
if [ ! -z "$BACKUP_RETENTION_DAYS" ]; then
|
|
info "Pruning old backups"
|
|
echo "Sleeping ${BACKUP_PRUNING_LEEWAY} before checking eligibility."
|
|
sleep "$BACKUP_PRUNING_LEEWAY"
|
|
bucket=$AWS_S3_BUCKET_NAME
|
|
|
|
rule_applies_to=$(
|
|
mc rm $MC_GLOBAL_OPTIONS --fake --recursive -force \
|
|
--older-than "${BACKUP_RETENTION_DAYS}d" \
|
|
"backup-target/$bucket" \
|
|
| wc -l
|
|
)
|
|
if [ "$rule_applies_to" == "0" ]; then
|
|
echo "No backups found older than the configured retention period of $BACKUP_RETENTION_DAYS days."
|
|
echo "Doing nothing."
|
|
exit 0
|
|
fi
|
|
|
|
total=$(mc ls $MC_GLOBAL_OPTIONS "backup-target/$bucket" | wc -l)
|
|
|
|
if [ "$rule_applies_to" == "$total" ]; then
|
|
echo "Using a retention of ${BACKUP_RETENTION_DAYS} days would prune all currently existing backups, will not continue."
|
|
echo "If this is what you want, please remove files manually instead of using this script."
|
|
exit 1
|
|
fi
|
|
|
|
mc rm $MC_GLOBAL_OPTIONS \
|
|
--recursive -force \
|
|
--older-than "${BACKUP_RETENTION_DAYS}d" "backup-target/$bucket"
|
|
echo "Successfully pruned ${rule_applies_to} backups older than ${BACKUP_RETENTION_DAYS} days."
|
|
fi
|