bundlewrap/bundles/postgresql/items.py

pkg_apt = {
    'postgresql-11': {},
    'postgresql-client-11': {},
}

if node.has_bundle('zfs'):
    pkg_apt['postgresql-11']['needs'] = {
        'zfs_dataset:tank/postgresql',
    }

postgres_roles = {
    'root': {
        'password': repo.vault.password_for('{} postgresql root'.format(node.name)),
        'superuser': True,
        'needs': {
            'svc_systemd:postgresql',
        },
    },
}

svc_systemd = {
    'postgresql': {
        'needs': {
            'pkg_apt:postgresql-11',
        },
    },
}

postgres_dbs = {}

for user, config in node.metadata.get('postgresql', {}).get('users', {}).items():
    postgres_roles[user] = {
        'password': config['password'],
        'needs': {
            'svc_systemd:postgresql',
        },
    }

for database, config in node.metadata.get('postgresql', {}).get('databases', {}).items():
    postgres_dbs[database] = {
        'owner': config['owner'],
        'needs': {
            'svc_systemd:postgresql',
        },
    }