296 lines
9.9 KiB
Python
296 lines
9.9 KiB
Python
#!/usr/bin/python
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# -*- coding: utf-8 -*-
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# This file is part of Ansible
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#
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# Ansible is free software: you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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#
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# Ansible is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with Ansible. If not, see <http://www.gnu.org/licenses/>.
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DOCUMENTATION = '''
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---
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module: postgresql_db
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short_description: Add or remove PostgreSQL databases from a remote host.
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description:
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- Add or remove PostgreSQL databases from a remote host.
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version_added: "0.6"
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options:
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name:
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description:
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- name of the database to add or remove
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required: true
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default: null
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login_user:
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description:
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- The username used to authenticate with
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required: false
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default: null
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login_password:
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description:
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- The password used to authenticate with
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required: false
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default: null
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login_host:
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description:
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- Host running the database
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required: false
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default: localhost
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owner:
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description:
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- Name of the role to set as owner of the database
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required: false
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default: null
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template:
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description:
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- Template used to create the database
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required: false
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default: null
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encoding:
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description:
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- Encoding of the database
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required: false
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default: null
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encoding:
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description:
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- Encoding of the database
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required: false
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default: null
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lc_collate:
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description:
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- Collation order (LC_COLLATE) to use in the database. Must match collation order of template database unless C(template0) is used as template.
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required: false
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default: null
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lc_ctype:
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description:
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- Character classification (LC_CTYPE) to use in the database (e.g. lower, upper, ...) Must match LC_CTYPE of template database unless C(template0) is used as template.
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required: false
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default: null
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state:
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description:
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- The database state
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required: false
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default: present
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choices: [ "present", "absent" ]
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notes:
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- The default authentication assumes that you are either logging in as or sudo'ing to the C(postgres) account on the host.
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- This module uses I(psycopg2), a Python PostgreSQL database adapter. You must ensure that psycopg2 is installed on
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the host before using this module. If the remote host is the PostgreSQL server (which is the default case), then PostgreSQL must also be installed on the remote host. For Ubuntu-based systems, install the C(postgresql), C(libpq-dev), and C(python-psycopg2) packages on the remote host before using this module.
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requirements: [ psycopg2 ]
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author: Lorin Hochstein
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'''
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EXAMPLES = '''
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# Create a new database with name "acme"
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- postgresql_db: name=acme
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# Create a new database with name "acme" and specific encoding and locale
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# settings. If a template different from "template0" is specified, encoding
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# and locale settings must match those of the template.
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- postgresql_db: name=acme
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encoding='UTF-8'
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lc_collate='de_DE.UTF-8'
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lc_ctype='de_DE.UTF-8'
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template='template0'
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'''
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try:
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import psycopg2
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import psycopg2.extras
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except ImportError:
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postgresqldb_found = False
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else:
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postgresqldb_found = True
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class NotSupportedError(Exception):
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pass
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# ===========================================
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# PostgreSQL module specific support methods.
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#
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def set_owner(cursor, db, owner):
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query = "ALTER DATABASE \"%s\" OWNER TO \"%s\"" % (db, owner)
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cursor.execute(query)
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return True
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def get_encoding_id(cursor, encoding):
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query = "SELECT pg_char_to_encoding(%(encoding)s) AS encoding_id;"
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cursor.execute(query, {'encoding': encoding})
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return cursor.fetchone()['encoding_id']
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def get_db_info(cursor, db):
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query = """
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SELECT rolname AS owner,
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pg_encoding_to_char(encoding) AS encoding, encoding AS encoding_id,
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datcollate AS lc_collate, datctype AS lc_ctype
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FROM pg_database JOIN pg_roles ON pg_roles.oid = pg_database.datdba
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WHERE datname = %(db)s
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"""
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cursor.execute(query, {'db':db})
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return cursor.fetchone()
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def db_exists(cursor, db):
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query = "SELECT * FROM pg_database WHERE datname=%(db)s"
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cursor.execute(query, {'db': db})
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return cursor.rowcount == 1
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def db_delete(cursor, db):
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if db_exists(cursor, db):
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query = "DROP DATABASE \"%s\"" % db
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cursor.execute(query)
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return True
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else:
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return False
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def db_create(cursor, db, owner, template, encoding, lc_collate, lc_ctype):
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if not db_exists(cursor, db):
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if owner:
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owner = " OWNER \"%s\"" % owner
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if template:
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template = " TEMPLATE \"%s\"" % template
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if encoding:
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encoding = " ENCODING '%s'" % encoding
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if lc_collate:
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lc_collate = " LC_COLLATE '%s'" % lc_collate
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if lc_ctype:
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lc_ctype = " LC_CTYPE '%s'" % lc_ctype
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query = 'CREATE DATABASE "%s"%s%s%s%s%s' % (db, owner,
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template, encoding,
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lc_collate, lc_ctype)
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cursor.execute(query)
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return True
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else:
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db_info = get_db_info(cursor, db)
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if (encoding and
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get_encoding_id(cursor, encoding) != db_info['encoding_id']):
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raise NotSupportedError(
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'Changing database encoding is not supported. '
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'Current encoding: %s' % db_info['encoding']
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)
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elif lc_collate and lc_collate != db_info['lc_collate']:
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raise NotSupportedError(
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'Changing LC_COLLATE is not supported. '
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'Current LC_COLLATE: %s' % db_info['lc_collate']
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)
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elif lc_ctype and lc_ctype != db_info['lc_ctype']:
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raise NotSupportedError(
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'Changing LC_CTYPE is not supported.'
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'Current LC_CTYPE: %s' % db_info['lc_ctype']
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)
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elif owner and owner != db_info['owner']:
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return set_owner(cursor, db, owner)
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else:
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return False
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def db_matches(cursor, db, owner, template, encoding, lc_collate, lc_ctype):
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if not db_exists(cursor, db):
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return False
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else:
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db_info = get_db_info(cursor, db)
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if (encoding and
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get_encoding_id(cursor, encoding) != db_info['encoding_id']):
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return False
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elif lc_collate and lc_collate != db_info['lc_collate']:
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return False
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elif lc_ctype and lc_ctype != db_info['lc_ctype']:
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return False
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elif owner and owner != db_info['owner']:
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return False
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else:
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return True
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# ===========================================
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# Module execution.
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#
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def main():
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module = AnsibleModule(
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argument_spec=dict(
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login_user=dict(default="postgres"),
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login_password=dict(default=""),
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login_host=dict(default=""),
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port=dict(default="5432"),
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db=dict(required=True, aliases=['name']),
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owner=dict(default=""),
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template=dict(default=""),
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encoding=dict(default=""),
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lc_collate=dict(default=""),
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lc_ctype=dict(default=""),
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state=dict(default="present", choices=["absent", "present"]),
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),
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supports_check_mode = True
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)
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if not postgresqldb_found:
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module.fail_json(msg="the python psycopg2 module is required")
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db = module.params["db"]
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port = module.params["port"]
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owner = module.params["owner"]
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template = module.params["template"]
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encoding = module.params["encoding"]
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lc_collate = module.params["lc_collate"]
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lc_ctype = module.params["lc_ctype"]
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state = module.params["state"]
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changed = False
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# To use defaults values, keyword arguments must be absent, so
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# check which values are empty and don't include in the **kw
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# dictionary
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params_map = {
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"login_host":"host",
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"login_user":"user",
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"login_password":"password",
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"port":"port"
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}
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kw = dict( (params_map[k], v) for (k, v) in module.params.iteritems()
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if k in params_map and v != '' )
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try:
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db_connection = psycopg2.connect(database="template1", **kw)
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# Enable autocommit so we can create databases
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if psycopg2.__version__ >= '2.4.2':
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db_connection.autocommit = True
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else:
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db_connection.set_isolation_level(psycopg2
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.extensions
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.ISOLATION_LEVEL_AUTOCOMMIT)
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cursor = db_connection.cursor(
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cursor_factory=psycopg2.extras.DictCursor)
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except Exception, e:
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module.fail_json(msg="unable to connect to database: %s" % e)
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try:
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if module.check_mode:
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if state == "absent":
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changed = not db_exists(cursor, db)
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elif state == "present":
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changed = not db_matches(cursor, db, owner, template, encoding,
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lc_collate, lc_ctype)
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module.exit_json(changed=changed,db=db)
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if state == "absent":
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changed = db_delete(cursor, db)
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elif state == "present":
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changed = db_create(cursor, db, owner, template, encoding,
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lc_collate, lc_ctype)
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except NotSupportedError, e:
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module.fail_json(msg=str(e))
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except Exception, e:
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module.fail_json(msg="Database query failed: %s" % e)
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module.exit_json(changed=changed, db=db)
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# import module snippets
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from ansible.module_utils.basic import *
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main()
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