56 lines
1.6 KiB
Text
56 lines
1.6 KiB
Text
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#!/usr/bin/env bash
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### Restore database from a backup.
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###
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### Parameters:
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### <1> filename of an existing backup.
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###
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### Usage:
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### $ docker-compose -f <environment>.yml (exec |run --rm) postgres restore <1>
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set -o errexit
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set -o pipefail
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set -o nounset
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working_dir="$(dirname ${0})"
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source "${working_dir}/_sourced/constants.sh"
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source "${working_dir}/_sourced/messages.sh"
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if [[ -z ${1+x} ]]; then
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message_error "Backup filename is not specified yet it is a required parameter. Make sure you provide one and try again."
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exit 1
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fi
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backup_filename="${BACKUP_DIR_PATH}/${1}"
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if [[ ! -f "${backup_filename}" ]]; then
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message_error "No backup with the specified filename found. Check out the 'backups' maintenance script output to see if there is one and try again."
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exit 1
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fi
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message_welcome "Restoring the '${POSTGRES_DB}' database from the '${backup_filename}' backup..."
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if [[ "${POSTGRES_USER}" == "postgres" ]]; then
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message_error "Restoring as 'postgres' user is not supported. Assign 'POSTGRES_USER' env with another one and try again."
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exit 1
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fi
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export PGHOST="${POSTGRES_HOST}"
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export PGPORT="${POSTGRES_PORT}"
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export PGUSER="${POSTGRES_USER}"
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export PGPASSWORD="${POSTGRES_PASSWORD}"
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export PGDATABASE="${POSTGRES_DB}"
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message_info "Dropping the database..."
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dropdb "${PGDATABASE}"
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message_info "Creating a new database..."
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createdb --owner="${POSTGRES_USER}"
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message_info "Applying the backup to the new database..."
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gunzip -c "${backup_filename}" | psql "${POSTGRES_DB}"
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message_success "The '${POSTGRES_DB}' database has been restored from the '${backup_filename}' backup."
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