echo "Updating and installing Docker"

sudo yum update -y

sudo yum upgrade -y

sudo yum remove docker \

docker-client \

docker-client-latest \

docker-common \

docker-latest \

docker-latest-logrotate \

docker-logrotate \

docker-engine

sudo yum install -y yum-utils \

device-mapper-persistent-data \

lvm2

sudo yum-config-manager -y \

--add-repo \

https://download.docker.com/linux/centos/docker-ce.repo

sudo yum install -y docker-ce docker-ce-cli containerd.io

echo "Starting and enabling Docker"

sudo systemctl start docker

sudo systemctl enable docker

echo "Configure database user"

read -p "Postgres user name: " name

read -s -p "Postgres user password: " password

export POSTGRES_USER=$name

export POSTGRES_PASSWORD=$password

export DB_NAME="sample"

sudo docker rm --force postgres || true

echo "Creating database container (and seed 'sample' database)"

sudo docker run -d \

--name postgres \

-e POSTGRES_USER=$POSTGRES_USER \

-e POSTGRES_PASSWORD=$POSTGRES_PASSWORD \

-e POSTGRES_DB=$DB_NAME \

-p 80:5432 \

--restart always \

postgres:9.6.8-alpine

sleep 20 # Ensure enough time for postgres database to initialize and create role

sudo docker exec -i postgres psql -U $POSTGRES_USER -d $DB_NAME <<-EOF