After the successful import of the ssh keypairs, the bootstrap generates this error.

Can anyone help me?

connection_factory=connection_factory, async=async)

psycopg2.OperationalError: could not connect to server: Connection refused

    Is the server running on host "localhost" (127.0.0.1) and accepting

    TCP/IP connections on port 5432?

I have tried:

• Ensuring PostgreSQL is installed and running via: 'sudo service postgresql start`

This errors appears how i running 'sudo apt-get update'.