backup/postgres-all.sh

#!/bin/bash

if [ "$(id -u)" != "0" ]; then
    echo -e "\033[31mThis script requires superuser rights\033[0m"
    exit 0
fi

trap 'echo -e "\033[31mpostgres-all.sh: Something went wrong\033[0m"; exit 1' ERR
set -e

export DEBIAN_FRONTEND=noninteractive

docker exec -i postgres psql -U $POSTGRES_USER -d $POSTGRES_DB -t -A -F',' <<-EOSQL |
  SELECT d.datname, a.rolname
  FROM pg_database d
  JOIN pg_roles a ON d.datdba = a.oid
  WHERE d.datistemplate = false;
EOSQL
while IFS=, read -r dbname owner; do
  bash postgres.sh "$dbname" "$owner"
done

trap - ERR
echo "All postgres databases backuped successfully"