gem-hunter
Language: Ruby
This is a fork of the Opscode PostgreSQL cookbook, which as been modified to install PostgresQL 9.1 on ubuntu (10.04) as well as support for synchronous replication and hot standby.
This is a fork of the Opscode PostgreSQL cookbook, which has been modified extensively.
database cookbook)TODO: while hot-standby is configured, there's nothing in postgresql that'll do automated failover if the master dies. Typically, that's accomplished by:
None of the above are handled automatically in this cookbook.
Note: Hot Standby and Streaming replication are only supported on Debian and Ubuntu.
Requires Opscode's openssl cookbook for secure password generation, and a C
compiler and development headers in order to build the pg RubyGem to provide
Ruby bindings so they're available in other cookbooks.
Opscode's build-essential cookbook provides this functionality on
Debian, Ubuntu, and EL6-family.
While not required, Opscode's database cookbook contains resources and
providers that can interact with a PostgreSQL database. The Opscode
postgresqlcookbook is a dependency of database.
The following attributes are set based on the platform, see the
attributes/default.rb file for default values.
node['postgresql']['version'] - version of postgresql to managenode['postgresql']['dir'] - home directory of where postgresql
data and configuration lives.node['postgresql']['client']['packages'] - An array of package names
that should be installed on "client" systems.node['postgresql']['server']['packages'] - An array of package names
that should be installed on "server" systems.The following attributes are generated in
recipe[postgresql::server].
node['postgresql']['password']['postgres'] - randomly generated
password by the openssl cookbook's library.node['postgresql']['ssl'] - whether to enable SSL (off for version
8.3, true for 8.4 and later).node[:postgresql][:ssl_password] (only tested on Ubuntu). This password is the passphrase used for signing the certificates.The following attributes are used by the setup recipe:
node['postgresql']['databag'] - the data bag in which the setup recipe
searches for items. Default is postgresqlnode['postgresql']['setup_items'] - a list of data bag items
containing user/database information. See the notes for the setup recipe
for the expected format.There are also a number of other attributes defined that control things such
as host based access (pg_hba.conf) and hot standby. A few are listed below,
but see attributes/default.rb for more information.
node['postgresql']['hba'] - a list of address/method hashes
defining the ip address that will be able to connect to PostreSQLThe following attributes can be modified to enable and configure streaming replication and for a Master or Standby.
default[:postgresql][:listen_addresses]default[:postgresql][:master] - Whether a node is a master. Defaults to
false. In this case, replication will not be configured, and the rest of the
master settings will be ignored.default[:postgresql][:standby] - Whether a node is a standby. Defaults to
false. In this case, replication will not be configured, and the rest of the
standby settings will be ignored.default[:postgresql][:wal_level] - set to hot_standby to enable Hot standby.default[:postgresql][:max_wal_senders]default[:postgresql][:wal_sender_delay]default[:postgresql][:wal_keep_segments]default[:postgresql][:vacuum_defer_cleanup_age]default[:postgresql][:replication_timeout]default[:postgresql][:synchronous_standby_names] - If you want synchronous
replication, this must be a string containing a comma-separated list of node
names of the standby servers.default[:postgresql][:standby_ips] - A list of IP addresses for standbys.
These MUST be specified in a role.default[:postgresql][:master_ip] - This MUST Be specified in the role. It
lets the standby know how to connect to the master.default[:postgresql][:hot_standby] - set to on to enable hot standby.default[:postgresql][:max_standby_archive_delay]default[:postgresql][:max_standby_streaming_delay]default[:postgresql][:wal_receiver_status_interval]default[:postgresql][:hot_standby_feedback]This recipe just includes the postgresql::client recipe, which installs the
postgresql client package and required dependencies.
Adds sources for a PosgresSQL 9.1 package for Ubuntu 10.04. NOTE that this recipe should only be used in Ubuntu 10.04. Newer versions of Ubuntu include PostgreSQL 9.1 in their package repository.
To use this, you'll need to specify the PostgreSQL version and dir
attributes. For example, add the folloing to your role:
override_attributes(
:postgresql => {
:version => "9.1",
:dir => "/etc/postgresql/9.1/main"
}
)
Installs postgresql client packages and development headers during the compile phase.
NOTE This recipe may not currently work when installing Chef with the "Omnibus" full stack installer on some platforms due to an incompatibility with OpenSSL. See COOK-1406
Install the pg gem under Chef's Ruby environment so it can be used
in other recipes.
Includes the server_debian or server_redhat recipe to get the appropriate
server packages installed and service managed. Also manages the configuration
for the server:
openssl) for postgrespg_hba.conf file.Installs the postgresql server packages, manages the postgresql service and the postgresql.conf file.
Manages the postgres user and group (with UID/GID 26, per RHEL package conventions), installs the postgresql server packages, initializes the database and manages the postgresql service, and manages the postgresql.conf file.
Creates Roles (user account) and Databases from a data bag. See the Usage section for more info.
See the database for resources and providers that can be used for managing PostgreSQL users and databases.
On systems that need to connect to a PostgreSQL database, add to a run list
recipe[postgresql] or recipe[postgresql::client].
On systems that should be PostgreSQL servers, use recipe[postgresql::server]
in a run list. This recipe does set a password and expect to use it. It
performs a node.save when Chef is not running in solo mode. If you're using
chef-solo, you'll need to set the attribute
node['postgresql']['password']['postgres'] in your node's json_attribs file
or in a role.
To set this up, you'd need to:
server recipe to the master and slave nodes to install a
standard postgresql server.node['postgresql']['hba']
attribute.chef-client on the Master. Wait for it to finish.chef-client on the Standby. It will fail. That's ok. Log into the
standby and make sure PostgreSQL is not running./var/lib/postgresql/9.1/main/.initial_transfer_complete, then re-run
chef-client (it will again copy the database data directory
over to the standby via rsync, so you'll be prompted for a password unless
you've got public keys in place... make sure this step works!)chef-client
on both nodes. Check to make sure PostgreSQL's sender and receiver
processes are running:
ps -ef | grep sender on the Masterps -ef | grep receiver on the Standbychef-client should work without any errors.To configure a Master server, you would need to create a role that sets the
appropriate properties. For example, given that you have a node namded db2
with an ip address of 10.0.0.11, you might create a role similar to the one
below:
name "pg_server_master"
description "A PostgreSQL Master"
run_list "recipe[postgresql::server]"
override_attributes(
:postgresql => {
:version => "9.1",
:dir => "/etc/postgresql/9.1/main",
:master => true,
:listen_addresses => "*",
:wal_level => "hot_standby",
:max_wal_senders => 5,
:standby_ips => [ "10.0.0.11", ],
:synchronous_standby_names => ["db2", ], # Omit this if you don't want
# synchronous replication
:hba => [
{ :method => 'md5', :address => '127.0.0.1/32' },
{ :method => 'md5', :address => '::1/128' },
{ :method => 'md5', :address => '10.0.0.10' },
{ :method => 'md5', :address => '10.0.0.11' },
]
}
)
To configure a Standby, you could create a similar role. Assuming the master
was available at an ip address of 10.0.0.10:
name "pg_server_standby"
description "A PostgreSQL Standby"
run_list "recipe[postgresql::server]"
override_attributes(
:postgresql => {
:version => "9.1",
:dir => "/etc/postgresql/9.1/main",
:standby => true,
:hot_standby => "on",
:master_ip => "10.0.0.10",
:hba => [
{ :method => 'md5', :address => '127.0.0.1/32' },
{ :method => 'md5', :address => '::1/128' },
{ :method => 'md5', :address => '10.0.0.10' },
{ :method => 'md5', :address => '10.0.0.11' },
]
}
)
To configure users and databases, create a data bag with the name used in the
default[:postgresql][:databag] attribute. Items in this databag will be used
to create both PostgreSQL users and databases. The format of each databag item
should be similar to the following:
{
"id": "sample_db_setup",
"users": [
{
"username":"some_user",
"password":"some_password",
"superuser": "true",
}
],
"databases": [
{
"name":"some_db",
"owner":"some_user",
"template":"template0",
"encoding": "UTF8",
"locale": "en_US.utf8"
}
]
}
Then, override the node['postgresql']['setup_items'] attribute in a role:
override_attributes(
:postgresql => {
:databag => "postgresql", # databag from which items are fetched
:setup_items => ["sample_db_setup", ] # name of item from which
# user/database info is read.
}
)
Author:: Joshua Timberman (joshua@opscode.com) Author:: Lamont Granquist (lamont@opscode.com) Author:: Brad Montgomery (brad@bradmontgomery.net)
Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License.