77 lines
3.1 KiB
Puppet
77 lines
3.1 KiB
Puppet
# Define: postgresql::validate_db_connection
|
|
#
|
|
# This type validates that a successful postgres connection can be established
|
|
# between the node on which this resource is run and a specified postgres
|
|
# instance (host/port/user/password/database name).
|
|
#
|
|
# Parameters:
|
|
# [*database_host*] - the hostname or IP address of the machine where the
|
|
# postgres server should be running.
|
|
# [*database_port*] - the port on which postgres server should be
|
|
# listening (defaults to 5432).
|
|
# [*database_username*] - the postgres username
|
|
# [*database_password*] - the postgres user's password
|
|
# [*database_name*] - the database name that the connection should be
|
|
# established against
|
|
#
|
|
# NOTE: to some degree this type assumes that you've created the corresponding
|
|
# postgres database instance that you are validating by using the
|
|
# `postgresql::db` or `postgresql::database` type provided by this module
|
|
# elsewhere in your manifests.
|
|
#
|
|
# Actions:
|
|
#
|
|
# Attempts to establish a connection to the specified postgres database. If
|
|
# a connection cannot be established, the resource will fail; this allows you
|
|
# to use it as a dependency for other resources that would be negatively
|
|
# impacted if they were applied without the postgres connection being available.
|
|
#
|
|
# Requires:
|
|
#
|
|
# `psql` commandline tool (will automatically install the system's postgres
|
|
# client package if it is not already installed.)
|
|
#
|
|
# Sample Usage:
|
|
#
|
|
# postgresql::validate_db_connection { 'validate my postgres connection':
|
|
# database_host => 'my.postgres.host',
|
|
# database_username => 'mydbuser',
|
|
# database_password => 'mydbpassword',
|
|
# database_name => 'mydbname',
|
|
# }
|
|
#
|
|
|
|
define postgresql::validate_db_connection(
|
|
$database_host,
|
|
$database_name,
|
|
$database_password,
|
|
$database_username,
|
|
$database_port = 5432
|
|
) {
|
|
require postgresql::client
|
|
|
|
# TODO: port to ruby
|
|
$psql = "${postgresql::params::psql_path} --tuples-only --quiet -h ${database_host} -U ${database_username} -p ${database_port} --dbname ${database_name}"
|
|
|
|
$exec_name = "validate postgres connection for ${database_host}/${database_name}"
|
|
exec { $exec_name:
|
|
command => '/bin/false',
|
|
unless => "/bin/echo \"SELECT 1\" | ${psql}",
|
|
cwd => '/tmp',
|
|
environment => "PGPASSWORD=${database_password}",
|
|
logoutput => 'on_failure',
|
|
require => Package['postgresql-client'],
|
|
}
|
|
|
|
# This is a little bit of puppet magic. What we want to do here is make
|
|
# sure that if the validation and the database instance creation are being
|
|
# applied on the same machine, then the database resource is applied *before*
|
|
# the validation resource. Otherwise, the validation is guaranteed to fail
|
|
# on the first run.
|
|
#
|
|
# We accomplish this by using Puppet's resource collection syntax to search
|
|
# for the Database resource in our current catalog; if it exists, the
|
|
# appropriate relationship is created here.
|
|
Database<|title == $database_name|> -> Exec[$exec_name]
|
|
}
|
|
|