602 lines
21 KiB
Python
602 lines
21 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_privs
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short_description: Grant or revoke privileges on PostgreSQL database objects.
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description:
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- Grant or revoke privileges on PostgreSQL database objects.
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- This module is basically a wrapper around most of the functionality of
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PostgreSQL's GRANT and REVOKE statements with detection of changes
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(GRANT/REVOKE I(privs) ON I(type) I(objs) TO/FROM I(roles))
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options:
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database:
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description:
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- Name of database to connect to.
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- 'Alias: I(db)'
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required: yes
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state:
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description:
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- If C(present), the specified privileges are granted, if C(absent) they
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are revoked.
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required: no
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default: present
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choices: [present, absent]
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privs:
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description:
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- Comma separated list of privileges to grant/revoke.
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- 'Alias: I(priv)'
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required: no
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type:
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description:
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- Type of database object to set privileges on.
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required: no
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default: table
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choices: [table, sequence, function, database,
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schema, language, tablespace, group]
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objs:
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description:
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- Comma separated list of database objects to set privileges on.
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- If I(type) is C(table) or C(sequence), the special value
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C(ALL_IN_SCHEMA) can be provided instead to specify all database
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objects of type I(type) in the schema specified via I(schema). (This
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also works with PostgreSQL < 9.0.)
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- If I(type) is C(database), this parameter can be omitted, in which case
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privileges are set for the database specified via I(database).
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- 'If I(type) is I(function), colons (":") in object names will be
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replaced with commas (needed to specify function signatures, see
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examples)'
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- 'Alias: I(obj)'
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required: no
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schema:
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description:
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- Schema that contains the database objects specified via I(objs).
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- May only be provided if I(type) is C(table), C(sequence) or
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C(function). Defaults to C(public) in these cases.
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required: no
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roles:
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description:
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- Comma separated list of role (user/group) names to set permissions for.
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- The special value C(PUBLIC) can be provided instead to set permissions
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for the implicitly defined PUBLIC group.
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- 'Alias: I(role)'
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required: yes
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grant_option:
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description:
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- Whether C(role) may grant/revoke the specified privileges/group
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memberships to others.
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- Set to C(no) to revoke GRANT OPTION, leave unspecified to
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make no changes.
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- I(grant_option) only has an effect if I(state) is C(present).
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- 'Alias: I(admin_option)'
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required: no
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choices: ['yes', 'no']
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host:
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description:
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- Database host address. If unspecified, connect via Unix socket.
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- 'Alias: I(login_host)'
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default: null
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required: no
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port:
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description:
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- Database port to connect to.
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required: no
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default: 5432
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login:
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description:
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- The username to authenticate with.
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- 'Alias: I(login_user)'
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default: postgres
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password:
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description:
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- The password to authenticate with.
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- 'Alias: I(login_password))'
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default: null
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required: no
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notes:
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- Default authentication assumes that postgresql_privs is run by the
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C(postgres) user on the remote host. (Ansible's C(user) or C(sudo-user)).
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- This module requires Python package I(psycopg2) to be installed on the
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remote host. In the default case of the remote host also being the
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PostgreSQL server, PostgreSQL has to be installed there as well, obviously.
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For Debian/Ubuntu-based systems, install packages I(postgresql) and
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I(python-psycopg2).
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- Parameters that accept comma separated lists (I(privs), I(objs), I(roles))
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have singular alias names (I(priv), I(obj), I(role)).
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- To revoke only C(GRANT OPTION) for a specific object, set I(state) to
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C(present) and I(grant_option) to C(no) (see examples).
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- Note that when revoking privileges from a role R, this role may still have
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access via privileges granted to any role R is a member of including
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C(PUBLIC).
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- Note that when revoking privileges from a role R, you do so as the user
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specified via I(login). If R has been granted the same privileges by
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another user also, R can still access database objects via these privileges.
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- When revoking privileges, C(RESTRICT) is assumed (see PostgreSQL docs).
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requirements: [psycopg2]
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author: Bernhard Weitzhofer
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"""
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EXAMPLES = """
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# On database "library":
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# GRANT SELECT, INSERT, UPDATE ON TABLE public.books, public.authors
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# TO librarian, reader WITH GRANT OPTION
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- postgresql_privs: >
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database=library
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state=present
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privs=SELECT,INSERT,UPDATE
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type=table
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objs=books,authors
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schema=public
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roles=librarian,reader
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grant_option=yes
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# Same as above leveraging default values:
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- postgresql_privs: >
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db=library
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privs=SELECT,INSERT,UPDATE
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objs=books,authors
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roles=librarian,reader
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grant_option=yes
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# REVOKE GRANT OPTION FOR INSERT ON TABLE books FROM reader
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# Note that role "reader" will be *granted* INSERT privilege itself if this
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# isn't already the case (since state=present).
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- postgresql_privs: >
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db=library
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state=present
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priv=INSERT
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obj=books
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role=reader
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grant_option=no
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# REVOKE INSERT, UPDATE ON ALL TABLES IN SCHEMA public FROM reader
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# "public" is the default schema. This also works for PostgreSQL 8.x.
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- postgresql_privs: >
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db=library
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state=absent
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privs=INSERT,UPDATE
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objs=ALL_IN_SCHEMA
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role=reader
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# GRANT ALL PRIVILEGES ON SCHEMA public, math TO librarian
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- postgresql_privs: >
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db=library
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privs=ALL
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type=schema
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objs=public,math
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role=librarian
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# GRANT ALL PRIVILEGES ON FUNCTION math.add(int, int) TO librarian, reader
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# Note the separation of arguments with colons.
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- postgresql_privs: >
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db=library
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privs=ALL
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type=function
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obj=add(int:int)
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schema=math
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roles=librarian,reader
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# GRANT librarian, reader TO alice, bob WITH ADMIN OPTION
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# Note that group role memberships apply cluster-wide and therefore are not
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# restricted to database "library" here.
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- postgresql_privs: >
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db=library
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type=group
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objs=librarian,reader
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roles=alice,bob
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admin_option=yes
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# GRANT ALL PRIVILEGES ON DATABASE library TO librarian
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# Note that here "db=postgres" specifies the database to connect to, not the
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# database to grant privileges on (which is specified via the "objs" param)
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- postgresql_privs: >
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db=postgres
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privs=ALL
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type=database
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obj=library
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role=librarian
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# GRANT ALL PRIVILEGES ON DATABASE library TO librarian
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# If objs is omitted for type "database", it defaults to the database
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# to which the connection is established
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- postgresql_privs: >
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db=library
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privs=ALL
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type=database
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role=librarian
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"""
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try:
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import psycopg2
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import psycopg2.extensions
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except ImportError:
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psycopg2 = None
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class Error(Exception):
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pass
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# We don't have functools.partial in Python < 2.5
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def partial(f, *args, **kwargs):
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"""Partial function application"""
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def g(*g_args, **g_kwargs):
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new_kwargs = kwargs.copy()
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new_kwargs.update(g_kwargs)
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return f(*(args + g_args), **g_kwargs)
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g.f = f
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g.args = args
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g.kwargs = kwargs
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return g
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class Connection(object):
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"""Wrapper around a psycopg2 connection with some convenience methods"""
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def __init__(self, host, port, login, password, database):
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self.database = database
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self.connection = psycopg2.connect(
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host=host, port=port, user=login,
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password=password, database=database
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)
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self.cursor = self.connection.cursor()
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def commit(self):
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self.connection.commit()
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def rollback(self):
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self.connection.rollback()
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@property
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def encoding(self):
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"""Connection encoding in Python-compatible form"""
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return psycopg2.extensions.encodings[self.connection.encoding]
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### Methods for querying database objects
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# PostgreSQL < 9.0 doesn't support "ALL TABLES IN SCHEMA schema"-like
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# phrases in GRANT or REVOKE statements, therefore alternative methods are
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# provided here.
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def schema_exists(self, schema):
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query = """SELECT count(*)
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FROM pg_catalog.pg_namespace WHERE nspname = %s"""
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self.cursor.execute(query, (schema,))
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return self.cursor.fetchone()[0] > 0
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def get_all_tables_in_schema(self, schema):
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if not self.schema_exists(schema):
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raise Error('Schema "%s" does not exist.' % schema)
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query = """SELECT relname
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FROM pg_catalog.pg_class c
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JOIN pg_catalog.pg_namespace n ON n.oid = c.relnamespace
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WHERE nspname = %s AND relkind = 'r'"""
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self.cursor.execute(query, (schema,))
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return [t[0] for t in self.cursor.fetchall()]
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def get_all_sequences_in_schema(self, schema):
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if not self.schema_exists(schema):
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raise Error('Schema "%s" does not exist.' % schema)
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query = """SELECT relname
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FROM pg_catalog.pg_class c
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JOIN pg_catalog.pg_namespace n ON n.oid = c.relnamespace
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WHERE nspname = %s AND relkind = 'S'"""
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self.cursor.execute(query, (schema,))
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return [t[0] for t in self.cursor.fetchall()]
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### Methods for getting access control lists and group membership info
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# To determine whether anything has changed after granting/revoking
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# privileges, we compare the access control lists of the specified database
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# objects before and afterwards. Python's list/string comparison should
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# suffice for change detection, we should not actually have to parse ACLs.
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# The same should apply to group membership information.
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def get_table_acls(self, schema, tables):
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query = """SELECT relacl
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FROM pg_catalog.pg_class c
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JOIN pg_catalog.pg_namespace n ON n.oid = c.relnamespace
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WHERE nspname = %s AND relkind = 'r' AND relname = ANY (%s)
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ORDER BY relname"""
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self.cursor.execute(query, (schema, tables))
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return [t[0] for t in self.cursor.fetchall()]
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def get_sequence_acls(self, schema, sequences):
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query = """SELECT relacl
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FROM pg_catalog.pg_class c
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JOIN pg_catalog.pg_namespace n ON n.oid = c.relnamespace
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WHERE nspname = %s AND relkind = 'S' AND relname = ANY (%s)
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ORDER BY relname"""
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self.cursor.execute(query, (schema, sequences))
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return [t[0] for t in self.cursor.fetchall()]
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def get_function_acls(self, schema, function_signatures):
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funcnames = [f.split('(', 1)[0] for f in function_signatures]
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query = """SELECT proacl
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FROM pg_catalog.pg_proc p
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JOIN pg_catalog.pg_namespace n ON n.oid = p.pronamespace
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WHERE nspname = %s AND proname = ANY (%s)
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ORDER BY proname, proargtypes"""
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self.cursor.execute(query, (schema, funcnames))
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return [t[0] for t in self.cursor.fetchall()]
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def get_schema_acls(self, schemas):
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query = """SELECT nspacl FROM pg_catalog.pg_namespace
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WHERE nspname = ANY (%s) ORDER BY nspname"""
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self.cursor.execute(query, (schemas,))
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return [t[0] for t in self.cursor.fetchall()]
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def get_language_acls(self, languages):
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query = """SELECT lanacl FROM pg_catalog.pg_language
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WHERE lanname = ANY (%s) ORDER BY lanname"""
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self.cursor.execute(query, (languages,))
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return [t[0] for t in self.cursor.fetchall()]
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def get_tablespace_acls(self, tablespaces):
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query = """SELECT spcacl FROM pg_catalog.pg_tablespace
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WHERE spcname = ANY (%s) ORDER BY spcname"""
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self.cursor.execute(query, (tablespaces,))
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return [t[0] for t in self.cursor.fetchall()]
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def get_database_acls(self, databases):
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query = """SELECT datacl FROM pg_catalog.pg_database
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WHERE datname = ANY (%s) ORDER BY datname"""
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self.cursor.execute(query, (databases,))
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return [t[0] for t in self.cursor.fetchall()]
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def get_group_memberships(self, groups):
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query = """SELECT roleid, grantor, member, admin_option
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FROM pg_catalog.pg_auth_members am
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JOIN pg_catalog.pg_roles r ON r.oid = am.roleid
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WHERE r.rolname = ANY(%s)
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ORDER BY roleid, grantor, member"""
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self.cursor.execute(query, (groups,))
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return self.cursor.fetchall()
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### Manipulating privileges
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def manipulate_privs(self, obj_type, privs, objs, roles,
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state, grant_option, schema_qualifier=None):
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"""Manipulate database object privileges.
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:param obj_type: Type of database object to grant/revoke
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privileges for.
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:param privs: Either a list of privileges to grant/revoke
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or None if type is "group".
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:param objs: List of database objects to grant/revoke
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privileges for.
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:param roles: Either a list of role names or "PUBLIC"
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for the implicitly defined "PUBLIC" group
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:param state: "present" to grant privileges, "absent" to revoke.
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:param grant_option: Only for state "present": If True, set
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grant/admin option. If False, revoke it.
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If None, don't change grant option.
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:param schema_qualifier: Some object types ("TABLE", "SEQUENCE",
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"FUNCTION") must be qualified by schema.
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Ignored for other Types.
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"""
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# get_status: function to get current status
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if obj_type == 'table':
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get_status = partial(self.get_table_acls, schema_qualifier)
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elif obj_type == 'sequence':
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get_status = partial(self.get_sequence_acls, schema_qualifier)
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elif obj_type == 'function':
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get_status = partial(self.get_function_acls, schema_qualifier)
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elif obj_type == 'schema':
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get_status = self.get_schema_acls
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elif obj_type == 'language':
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get_status = self.get_language_acls
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elif obj_type == 'tablespace':
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get_status = self.get_tablespace_acls
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elif obj_type == 'database':
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get_status = self.get_database_acls
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elif obj_type == 'group':
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get_status = self.get_group_memberships
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else:
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raise Error('Unsupported database object type "%s".' % obj_type)
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# Return False (nothing has changed) if there are no objs to work on.
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if not objs:
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return False
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# obj_ids: quoted db object identifiers (sometimes schema-qualified)
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if obj_type == 'function':
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obj_ids = []
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for obj in objs:
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try:
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f, args = obj.split('(', 1)
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except:
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raise Error('Illegal function signature: "%s".' % obj)
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obj_ids.append('"%s"."%s"(%s' % (schema_qualifier, f, args))
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elif obj_type in ['table', 'sequence']:
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obj_ids = ['"%s"."%s"' % (schema_qualifier, o) for o in objs]
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else:
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obj_ids = ['"%s"' % o for o in objs]
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# set_what: SQL-fragment specifying what to set for the target roless:
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# Either group membership or privileges on objects of a certain type.
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if obj_type == 'group':
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set_what = ','.join(obj_ids)
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else:
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set_what = '%s ON %s %s' % (','.join(privs), obj_type,
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','.join(obj_ids))
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# for_whom: SQL-fragment specifying for whom to set the above
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if roles == 'PUBLIC':
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for_whom = 'PUBLIC'
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else:
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for_whom = ','.join(['"%s"' % r for r in roles])
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status_before = get_status(objs)
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if state == 'present':
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if grant_option:
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if obj_type == 'group':
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query = 'GRANT %s TO %s WITH ADMIN OPTION'
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else:
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query = 'GRANT %s TO %s WITH GRANT OPTION'
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else:
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query = 'GRANT %s TO %s'
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self.cursor.execute(query % (set_what, for_whom))
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# Only revoke GRANT/ADMIN OPTION if grant_option actually is False.
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if grant_option == False:
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if obj_type == 'group':
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query = 'REVOKE ADMIN OPTION FOR %s FROM %s'
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else:
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query = 'REVOKE GRANT OPTION FOR %s FROM %s'
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self.cursor.execute(query % (set_what, for_whom))
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else:
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query = 'REVOKE %s FROM %s'
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self.cursor.execute(query % (set_what, for_whom))
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status_after = get_status(objs)
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return status_before != status_after
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def main():
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module = AnsibleModule(
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argument_spec = dict(
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database=dict(required=True, aliases=['db']),
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state=dict(default='present', choices=['present', 'absent']),
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privs=dict(required=False, aliases=['priv']),
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type=dict(default='table',
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choices=['table',
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'sequence',
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'function',
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'database',
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'schema',
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'language',
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'tablespace',
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|
'group']),
|
|
objs=dict(required=False, aliases=['obj']),
|
|
schema=dict(required=False),
|
|
roles=dict(required=True, aliases=['role']),
|
|
grant_option=dict(required=False, type='bool',
|
|
aliases=['admin_option']),
|
|
host=dict(required=False, aliases=['login_host']),
|
|
port=dict(type='int', default=5432),
|
|
login=dict(default='postgres', aliases=['login_user']),
|
|
password=dict(required=False, aliases=['login_password'])
|
|
),
|
|
supports_check_mode = True
|
|
)
|
|
|
|
# Create type object as namespace for module params
|
|
p = type('Params', (), module.params)
|
|
|
|
# param "schema": default, allowed depends on param "type"
|
|
if p.type in ['table', 'sequence', 'function']:
|
|
p.schema = p.schema or 'public'
|
|
elif p.schema:
|
|
module.fail_json(msg='Argument "schema" is not allowed '
|
|
'for type "%s".' % p.type)
|
|
|
|
# param "objs": default, required depends on param "type"
|
|
if p.type == 'database':
|
|
p.objs = p.objs or p.database
|
|
elif not p.objs:
|
|
module.fail_json(msg='Argument "objs" is required '
|
|
'for type "%s".' % p.type)
|
|
|
|
# param "privs": allowed, required depends on param "type"
|
|
if p.type == 'group':
|
|
if p.privs:
|
|
module.fail_json(msg='Argument "privs" is not allowed '
|
|
'for type "group".')
|
|
elif not p.privs:
|
|
module.fail_json(msg='Argument "privs" is required '
|
|
'for type "%s".' % p.type)
|
|
|
|
# Connect to Database
|
|
if not psycopg2:
|
|
module.fail_json(msg='Python module "psycopg2" must be installed.')
|
|
try:
|
|
conn = Connection(p.host, p.port, p.login, p.password, p.database)
|
|
except psycopg2.Error, e:
|
|
module.fail_json(msg='Could not connect to database: %s' % e)
|
|
|
|
try:
|
|
# privs
|
|
if p.privs:
|
|
privs = p.privs.split(',')
|
|
else:
|
|
privs = None
|
|
|
|
# objs:
|
|
if p.type == 'table' and p.objs == 'ALL_IN_SCHEMA':
|
|
objs = conn.get_all_tables_in_schema(p.schema)
|
|
elif p.type == 'sequence' and p.objs == 'ALL_IN_SCHEMA':
|
|
objs = conn.get_all_sequences_in_schema(p.schema)
|
|
else:
|
|
objs = p.objs.split(',')
|
|
|
|
# function signatures are encoded using ':' to separate args
|
|
if p.type == 'function':
|
|
objs = [obj.replace(':', ',') for obj in objs]
|
|
|
|
# roles
|
|
if p.roles == 'PUBLIC':
|
|
roles = 'PUBLIC'
|
|
else:
|
|
roles = p.roles.split(',')
|
|
|
|
changed = conn.manipulate_privs(
|
|
obj_type = p.type,
|
|
privs = privs,
|
|
objs = objs,
|
|
roles = roles,
|
|
state = p.state,
|
|
grant_option = p.grant_option,
|
|
schema_qualifier=p.schema
|
|
)
|
|
|
|
except Error, e:
|
|
conn.rollback()
|
|
module.fail_json(msg=e.message)
|
|
|
|
except psycopg2.Error, e:
|
|
conn.rollback()
|
|
# psycopg2 errors come in connection encoding, reencode
|
|
msg = e.message.decode(conn.encoding).encode(errors='replace')
|
|
module.fail_json(msg=msg)
|
|
|
|
if module.check_mode:
|
|
conn.rollback()
|
|
else:
|
|
conn.commit()
|
|
module.exit_json(changed=changed)
|
|
|
|
|
|
# this is magic, see lib/ansible/module_common.py
|
|
#<<INCLUDE_ANSIBLE_MODULE_COMMON>>
|
|
main()
|