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#! /bin/sh
set -e set -x set -o pipefail
if [ "${S3_ACCESS_KEY_ID}" = "**None**" ]; then echo "You need to set the S3_ACCESS_KEY_ID environment variable." exit 1 fi
if [ "${S3_SECRET_ACCESS_KEY}" = "**None**" ]; then echo "You need to set the S3_SECRET_ACCESS_KEY environment variable." exit 1 fi
if [ "${S3_BUCKET}" = "**None**" ]; then echo "You need to set the S3_BUCKET environment variable." exit 1 fi
if [ "${POSTGRES_DATABASE}" = "**None**" ]; then echo "You need to set the POSTGRES_DATABASE environment variable." exit 1 fi
if [ "${POSTGRES_HOST}" = "**None**" ]; then if [ -n "${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 [ "${POSTGRES_USER}" = "**None**" ]; then echo "You need to set the POSTGRES_USER environment variable." exit 1 fi
if [ "${POSTGRES_PASSWORD}" = "**None**" ]; then echo "You need to set the POSTGRES_PASSWORD environment variable or link to a container named POSTGRES." exit 1 fi
if [ "${S3_ENDPOINT}" == "**None**" ]; then AWS_ARGS="" else AWS_ARGS="--endpoint-url ${S3_ENDPOINT}" fi
# env vars needed for aws tools export AWS_ACCESS_KEY_ID=$S3_ACCESS_KEY_ID export AWS_SECRET_ACCESS_KEY=$S3_SECRET_ACCESS_KEY export AWS_DEFAULT_REGION=$S3_REGION
export PGPASSWORD=$POSTGRES_PASSWORD POSTGRES_HOST_OPTS="-h $POSTGRES_HOST -p $POSTGRES_PORT -U $POSTGRES_USER"
echo "Finding latest backup"
LATEST_BACKUP=$(aws $AWS_ARGS s3 ls s3://$S3_BUCKET/$S3_PREFIX/ | sort | tail -n 1 | awk '{ print $4 }')
echo "Fetching ${LATEST_BACKUP} from S3"
aws $AWS_ARGS s3 cp s3://$S3_BUCKET/$S3_PREFIX/${LATEST_BACKUP} dump.sql.gz gzip -d dump.sql.gz
if [ "${DROP_PUBLIC}" == "yes" ]; then echo "Recreating the public schema" psql $POSTGRES_HOST_OPTS -d "$POSTGRES_DATABASE" -c "drop schema public cascade; create schema public;" fi
echo "Restoring ${LATEST_BACKUP} to ${POSTGRES_DATABASE} on ${POSTGRES_HOST}:${POSTGRES_PORT} with user ${POSTGRES_USER}"
set +e psql $POSTGRES_HOST_OPTS -d postgres -c "SELECT pg_terminate_backend(pg_stat_activity.pid) FROM pg_stat_activity WHERE pg_stat_activity.datname = '$POSTGRES_DATABASE' AND pid <> pg_backend_pid();" psql $POSTGRES_HOST_OPTS -d postgres -c "DROP DATABASE IF EXISTS \"$POSTGRES_DATABASE\";" psql $POSTGRES_HOST_OPTS -d postgres -c "CREATE DATABASE \"$POSTGRES_DATABASE\";" psql $POSTGRES_HOST_OPTS -d postgres -c "GRANT ALL PRIVILEGES ON DATABASE \"$POSTGRES_DATABASE\" TO $POSTGRES_USER;"
set -e psql $POSTGRES_HOST_OPTS -d "$POSTGRES_DATABASE" -c "CREATE EXTENSION IF NOT EXISTS citext;" psql $POSTGRES_HOST_OPTS -d "$POSTGRES_DATABASE" -c "ALTER EXTENSION citext SET SCHEMA public;" psql $POSTGRES_HOST_OPTS -d "$POSTGRES_DATABASE" -c "CREATE EXTENSION IF NOT EXISTS plpgsql;" pg_restore -V pg_restore $POSTGRES_HOST_OPTS --no-owner --single-transaction -n public --no-privileges -v -d "$POSTGRES_DATABASE" dump.sql
echo "Restore complete"
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