While provisioning via Vagrant and Ansible I keep running into this issue.
TASK [postgresql : Create extensions] ******************************************
failed: [myapp] (item=postgresql_extensions) => {"changed": true, "cmd": "psql myapp -c 'CREATE EXTENSION IF NOT EXISTS postgresql_extensions;'", "delta": "0:00:00.037786", "end": "2017-04-01 08:37:34.805325", "failed": true, "item": "postgresql_extensions", "rc": 1, "start": "2017-04-01 08:37:34.767539", "stderr": "ERROR: could not open extension control file \"/usr/share/postgresql/9.3/extension/postgresql_extensions.control\": No such file or directory", "stdout": "", "stdout_lines": [], "warnings": []}
I'm using a railsbox.io generated playbook.