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mirror of https://github.com/garraflavatra/docker-volume-s3-backup.git synced 2025-05-17 21:24:39 +00:00
Elliott Shugerman c036e13ef4 readme
2019-12-02 22:02:09 -07:00

97 lines
2.2 KiB
Bash

#! /bin/sh
set -eu
set -o pipefail
if [ -z "$S3_ACCESS_KEY_ID" ]; then
echo "You need to set the S3_ACCESS_KEY_ID environment variable."
exit 1
fi
if [ -z "$S3_SECRET_ACCESS_KEY" ]; then
echo "You need to set the S3_SECRET_ACCESS_KEY environment variable."
exit 1
fi
if [ -z "$S3_BUCKET" ]; then
echo "You need to set the S3_BUCKET environment variable."
exit 1
fi
if [ -z "$POSTGRES_DATABASE" ]; then
echo "You need to set the POSTGRES_DATABASE environment variable."
exit 1
fi
if [ -z "$POSTGRES_HOST" ]; then
# TODO: what is this?
if [ -n "$POSTGRES_PORT_5432_TCP_ADDR" ]; then
POSTGRES_HOST=$POSTGRES_PORT_5432_TCP_ADDR
POSTGRES_PORT=$POSTGRES_PORT_5432_TCP_PORT
else
echo "You need to set the POSTGRES_HOST environment variable."
exit 1
fi
fi
if [ -z "$POSTGRES_USER" ]; then
echo "You need to set the POSTGRES_USER environment variable."
exit 1
fi
if [ -z "$POSTGRES_PASSWORD" ]; then
echo "You need to set the POSTGRES_PASSWORD environment variable" \
"or link to a container named POSTGRES."
exit 1
fi
if [ -z "$S3_ENDPOINT" ]; then
aws_args=""
else
aws_args="--endpoint-url $S3_ENDPOINT"
fi
export AWS_ACCESS_KEY_ID=$S3_ACCESS_KEY_ID
export AWS_SECRET_ACCESS_KEY=$S3_SECRET_ACCESS_KEY
export AWS_DEFAULT_REGION=$S3_REGION
export PGPASSWORD=$POSTGRES_PASSWORD
s3_uri_base="s3://${S3_BUCKET}/${S3_PREFIX}"
if [ -z "$PASSPHRASE" ]; then
file_type=".dump"
else
file_type=".dump.gpg"
fi
if [ $# -eq 1 ]; then
timestamp="$1"
key_suffix="${POSTGRES_DATABASE}_${timestamp}${file_type}"
else
echo "Finding latest backup..."
key_suffix=$(
aws $aws_args s3 ls "${s3_uri_base}/${POSTGRES_DATABASE}" \
| sort \
| tail -n 1 \
| awk '{ print $4 }'
)
fi
echo "Fetching backup from S3..."
aws $aws_args s3 cp "${s3_uri_base}/${key_suffix}" "db${file_type}"
if [ -n "$PASSPHRASE" ]; then
echo "Decrypting backup..."
gpg --decrypt --batch --passphrase "$PASSPHRASE" db.dump.gpg > db.dump
rm db.dump.gpg
fi
conn_opts="-h $POSTGRES_HOST -p $POSTGRES_PORT -U $POSTGRES_USER -d $POSTGRES_DATABASE"
echo "Restoring from backup..."
pg_restore $conn_opts --single-transaction --clean db.dump
rm db.dump
echo "Restore complete."