Error: pg_config executable not found

ansibleでpostgresqlを操作しようとするとこんなエラーがでた

fatal: [10.0.1.11]: FAILED! => {"changed": false, "failed": true, "msg": "the python psycopg2 module is required"}

pip install psycopg2を実行するとさらにエラーがでる

pip install psycopg2                                            [/root/raito-real4-ansible]
Collecting psycopg2
  Using cached psycopg2-2.6.1.tar.gz
    Complete output from command python setup.py egg_info:
    running egg_info
    creating pip-egg-info/psycopg2.egg-info
    writing pip-egg-info/psycopg2.egg-info/PKG-INFO
    writing top-level names to pip-egg-info/psycopg2.egg-info/top_level.txt
    writing dependency_links to pip-egg-info/psycopg2.egg-info/dependency_links.txt
    writing manifest file 'pip-egg-info/psycopg2.egg-info/SOURCES.txt'
    warning: manifest_maker: standard file '-c' not found
    Error: pg_config executable not found.

    Please add the directory containing pg_config to the PATH
    or specify the full executable path with the option:

        python setup.py build_ext --pg-config /path/to/pg_config build ...

    or with the pg_config option in 'setup.cfg'.

    ----------------------------------------
Command "python setup.py egg_info" failed with error code 1 in /tmp/pip-build-Fzivtw/psycopg2

pg_configはpostgresql-develに含まれてるらしい

sudo yum install postgresql-devel

知らなかった。。。