bash script to have a postgres DB in a docker container - postgresql

Question

I'm having trouble in creating a Postgres DB using this bash script:
#! /bin/bash
docker pull postgres
docker run --name coverage-postgres -e POSTGRES_PASSWORD=password -p 5432:5432 -d postgres
export CONTAINER_ID=$(sudo docker ps -a | grep coverage-postgres | head -c12)
sleep 2s
sudo docker exec -it $CONTAINER_ID psql -U postgres -c "create user coverage_user with password 'password';"
sleep 0.5
sudo docker exec -it $CONTAINER_ID psql -U postgres -c "create database coverage owner coverage_user;"
sleep 0.5
sudo docker exec -it $CONTAINER_ID psql -U postgres -c "grant all privileges on database coverage to coverage_user;"
sleep 0.5
sudo docker exec -it $CONTAINER_ID psql -U postgres -c "\c coverage coverage_user" # it seems useless...
sleep 0.5
sudo docker exec -it $CONTAINER_ID psql -U postgres -c "CREATE TABLE IF NOT EXISTS postal_codes (id,...;"
sleep 0.5
sudo docker exec -it $CONTAINER_ID psql -U postgres -c "CREATE UNIQUE INDEX ... ;"
# exit from container
exit
# restart container
docker start $CONTAINER_ID
In particular, the database is created, the user is created, the table is created but... it's not in the coverage db but in postgres db.
I've tried to add "CREATE TABLE coverage.postal_codes" but coverage is a db and not a schema and it didn't work.
I've tried to use: psql -U coverage_user but the system tells me that database coverage_user doesn't exist.
So of course I thought "I have to specify the database of course!". Then I've tried to use: psql -U coverage as the name of the database but this time, the system makes fun of me and, changing its mind, tells me that the role coverage doesn't exists.
I tried a workaround: within the command -c "\c coverage coverage_user" I concatenated the other commands this way:
-c "\c coverage coverage_user; CREATE TABLE...; CREATE UNIQUE INDEX...;"
but, of course, neither this worked at all.
I make a premise: I know there are other ways to do this but I would like to understand what I am missing with these specific commands.

Answer 1

Solution
#! /bin/bash
docker pull postgres
docker run --name coverage-postgres -e POSTGRES_PASSWORD=password -p 5432:5432 -d postgres
export CONTAINER_ID=$(sudo docker ps -a | grep coverage-postgres | head -c12)
sleep 2s
docker exec -it $CONTAINER_ID psql -U postgres -c "create user coverage_user with password 'password';"
sleep 0.5
docker exec -it $CONTAINER_ID psql -U postgres -c "create database coverage owner coverage_user;"
sleep 0.5
docker exec -it $CONTAINER_ID psql -U postgres -c "grant all privileges on database coverage to coverage_user;"
sleep 0.5
docker exec -it $CONTAINER_ID psql -U coverage_user -c "CREATE TABLE IF NOT EXISTS postal_codes (id int)" coverage
Explanation
https://www.postgresql.org/docs/9.2/app-psql.html
psql [option...] [dbname [username]]
Just add dbname after options. And change user as -U option. You can pass dbname also as an rgument -d