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Backup directory #53

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Backup directory #53

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7c9e111
Support backup folder
lcd1232 Jun 5, 2024
f128ea4
Update README
lcd1232 Jun 5, 2024
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2 changes: 1 addition & 1 deletion Dockerfile
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Original file line number Diff line number Diff line change
Expand Up @@ -3,7 +3,7 @@ FROM alpine:${ALPINE_VERSION}
ARG TARGETARCH

ADD src/install.sh install.sh
RUN sh install.sh && rm install.sh
RUN sh install.sh && rm install.sh && mkdir /backup

ENV POSTGRES_DATABASE ''
ENV POSTGRES_HOST ''
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2 changes: 2 additions & 0 deletions README.md
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Expand Up @@ -26,6 +26,8 @@ services:
POSTGRES_DATABASE: dbname
POSTGRES_USER: user
POSTGRES_PASSWORD: password
volumes:
- /mnt/path/to/backup/folder:/backup # optional
```

- Images are tagged by the major PostgreSQL version supported: `12`, `13`, `14`, `15` or `16`.
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12 changes: 6 additions & 6 deletions src/backup.sh
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Expand Up @@ -12,20 +12,20 @@ pg_dump --format=custom \
-U $POSTGRES_USER \
-d $POSTGRES_DATABASE \
$PGDUMP_EXTRA_OPTS \
> db.dump
> backup/db.dump

timestamp=$(date +"%Y-%m-%dT%H:%M:%S")
s3_uri_base="s3://${S3_BUCKET}/${S3_PREFIX}/${POSTGRES_DATABASE}_${timestamp}.dump"

if [ -n "$PASSPHRASE" ]; then
echo "Encrypting backup..."
rm -f db.dump.gpg
gpg --symmetric --batch --passphrase "$PASSPHRASE" db.dump
rm db.dump
local_file="db.dump.gpg"
rm -f backup/db.dump.gpg
gpg --symmetric --batch --passphrase "$PASSPHRASE" backup/db.dump
rm backup/db.dump
local_file="backup/db.dump.gpg"
s3_uri="${s3_uri_base}.gpg"
else
local_file="db.dump"
local_file="backup/db.dump"
s3_uri="$s3_uri_base"
fi

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10 changes: 5 additions & 5 deletions src/restore.sh
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Expand Up @@ -27,18 +27,18 @@ else
fi

echo "Fetching backup from S3..."
aws $aws_args s3 cp "${s3_uri_base}/${key_suffix}" "db${file_type}"
aws $aws_args s3 cp "${s3_uri_base}/${key_suffix}" "backup/db${file_type}"

if [ -n "$PASSPHRASE" ]; then
echo "Decrypting backup..."
gpg --decrypt --batch --passphrase "$PASSPHRASE" db.dump.gpg > db.dump
rm db.dump.gpg
gpg --decrypt --batch --passphrase "$PASSPHRASE" backup/db.dump.gpg > backup/db.dump
rm backup/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 --clean --if-exists db.dump
rm db.dump
pg_restore $conn_opts --clean --if-exists backup/db.dump
rm backup/db.dump

echo "Restore complete."