mirror of
https://github.com/garraflavatra/docker-volume-s3-backup.git
synced 2025-05-17 21:24:39 +00:00
97 lines
2.2 KiB
Bash
97 lines
2.2 KiB
Bash
#! /bin/sh
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set -eu
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set -o pipefail
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if [ -z "$S3_ACCESS_KEY_ID" ]; then
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echo "You need to set the S3_ACCESS_KEY_ID environment variable."
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exit 1
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fi
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if [ -z "$S3_SECRET_ACCESS_KEY" ]; then
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echo "You need to set the S3_SECRET_ACCESS_KEY environment variable."
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exit 1
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fi
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if [ -z "$S3_BUCKET" ]; then
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echo "You need to set the S3_BUCKET environment variable."
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exit 1
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fi
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if [ -z "$POSTGRES_DATABASE" ]; then
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echo "You need to set the POSTGRES_DATABASE environment variable."
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exit 1
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fi
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if [ -z "$POSTGRES_HOST" ]; then
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# TODO: what is this?
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if [ -n "$POSTGRES_PORT_5432_TCP_ADDR" ]; then
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POSTGRES_HOST=$POSTGRES_PORT_5432_TCP_ADDR
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POSTGRES_PORT=$POSTGRES_PORT_5432_TCP_PORT
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else
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echo "You need to set the POSTGRES_HOST environment variable."
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exit 1
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fi
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fi
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if [ -z "$POSTGRES_USER" ]; then
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echo "You need to set the POSTGRES_USER environment variable."
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exit 1
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fi
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if [ -z "$POSTGRES_PASSWORD" ]; then
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echo "You need to set the POSTGRES_PASSWORD environment variable" \
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"or link to a container named POSTGRES."
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exit 1
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fi
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if [ -z "$S3_ENDPOINT" ]; then
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aws_args=""
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else
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aws_args="--endpoint-url $S3_ENDPOINT"
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fi
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export AWS_ACCESS_KEY_ID=$S3_ACCESS_KEY_ID
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export AWS_SECRET_ACCESS_KEY=$S3_SECRET_ACCESS_KEY
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export AWS_DEFAULT_REGION=$S3_REGION
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export PGPASSWORD=$POSTGRES_PASSWORD
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s3_uri_base="s3://${S3_BUCKET}/${S3_PREFIX}"
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if [ -z "$PASSPHRASE" ]; then
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file_type=".dump"
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else
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file_type=".dump.gpg"
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fi
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if [ $# -eq 1 ]; then
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timestamp="$1"
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key_suffix="${POSTGRES_DATABASE}_${timestamp}${file_type}"
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else
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echo "Finding latest backup..."
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key_suffix=$(
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aws $aws_args s3 ls "${s3_uri_base}/${POSTGRES_DATABASE}" \
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| sort \
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| tail -n 1 \
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| awk '{ print $4 }'
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)
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fi
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echo "Fetching backup from S3..."
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aws $aws_args s3 cp "${s3_uri_base}/${key_suffix}" "db${file_type}"
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if [ -n "$PASSPHRASE" ]; then
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echo "Decrypting backup..."
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gpg --decrypt --batch --passphrase "$PASSPHRASE" db.dump.gpg > db.dump
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rm db.dump.gpg
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fi
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conn_opts="-h $POSTGRES_HOST -p $POSTGRES_PORT -U $POSTGRES_USER -d $POSTGRES_DATABASE"
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echo "Restoring from backup..."
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pg_restore $conn_opts --single-transaction --clean db.dump
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rm db.dump
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echo "Restore complete."
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