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# @summary
# Set up the environment for an haproxy service.
#
# @note
# * Associate an haproxy instance with the haproxy package it should use.
# * Create the start/restart/stop functions needed by Service[].
# In other words: sets things up so that Service[$instance_name] will work.
#
# In particular:
# * Create a link to the binary an instance will be using. This
# way each instance can link to a different binary.
# If you have an instance called "foo", you know "haproxy-foo"
# is a link to the binary it should be using.
# * Create an init.d file named after the instance. This way
# Service[$instance] can start/restart the service.
#
# @note
# This manifest is just one example of how to set up Service[$instance].
# Other sites may choose to do it very differently. In that case, do
# not call haproxy::instance_service; write your own module. The only
# requirement is that before haproxy::instance{$instance:} is called,
# Service[$instance] must be defined.
#
# FIXME: This hasn't been tested on FreeBSD.
# FIXME: This should take advantage of systemd when available.
#
#
# @param haproxy_package
# The name of the package to be installed. This is useful if
# you package your own custom version of haproxy.
# Defaults to 'haproxy'
#
# @param bindir
# Where to put symlinks to the binary used for each instance.
# Defaults to '/opt/haproxy'
#
# @param haproxy_init_source
# The init.d script that will start/restart/reload this instance.
#
# @param haproxy_unit_template
# The template that will be used to create an unit file.
#
define haproxy::instance_service (
Optional[String] $haproxy_init_source = undef,
String $haproxy_unit_template = 'haproxy/instance_service_unit.epp',
String $haproxy_package = 'haproxy',
Stdlib::Absolutepath $bindir = '/opt/haproxy/bin',
) {
ensure_resource('package', $haproxy_package, {
'ensure' => 'present',
})
# Manage the parent directory.
ensure_resource('file', $bindir, {
ensure => directory,
owner => 'root',
group => 'root',
mode => '0744',
})
# Create a link named after the instance. This just makes it easier
# to manage difference instances using different versions of haproxy.
# If you have an instance called "foo", you know "haproxy-foo"
# is the binary.
$haproxy_link = "${bindir}/haproxy-${title}"
if $haproxy_package == 'haproxy' {
$haproxy_target = '/usr/sbin/haproxy'
} else {
$haproxy_target = "/opt/${haproxy_package}/sbin/haproxy"
}
file { $haproxy_link:
ensure => link,
target => $haproxy_target,
}
# Create init.d or systemd files so that "service haproxy-$instance start"
# or "systemd start haproxy-$instance" works.
# This is not required if the standard instance is being used.
if ($title == 'haproxy') and ($haproxy_package == 'haproxy') {
} else {
$initfile = "/etc/init.d/haproxy-${title}"
# systemd:
if $haproxy_package == 'haproxy' {
$wrapper = '/usr/sbin/haproxy-systemd-wrapper'
} else {
$wrapper = "/opt/${haproxy_package}/sbin/haproxy-systemd-wrapper"
}
if $facts['os']['family'] == 'RedHat' {
$unitfile = "/usr/lib/systemd/system/haproxy-${title}.service"
} else {
$unitfile = "/lib/systemd/system/haproxy-${title}.service"
}
$parameters = {
'title' => $title,
'wrapper' => $wrapper,
}
file { $unitfile:
ensure => file,
mode => '0644',
owner => 'root',
group => 'root',
content => epp($haproxy_unit_template, $parameters),
notify => Exec['systemctl daemon-reload'],
}
if (!defined(Exec['systemctl daemon-reload'])) {
exec { 'systemctl daemon-reload':
command => 'systemctl daemon-reload',
path => '/bin:/usr/bin:/usr/local/bin:/sbin:/usr/sbin',
refreshonly => true,
before => Service["haproxy-${title}"],
}
}
File[$haproxy_link] -> File[$unitfile]
# Clean up in case the old init.d-style file is still around.
file { $initfile:
ensure => absent,
before => Service["haproxy-${title}"],
}
}
Package[$haproxy_package] -> File[$bindir] -> File[$haproxy_link]
}
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