Defined Type: service::node

Defined in:
puppet/modules/service/manifests/node.pp

Overview

Define: service::node

service::node provides a common wrapper for setting up Node.js services based on service-runner and/or service-template-node. Note that most of the facts listed as parameters to this class are set correctly via the service class and/or Hiera. The only required parameter is the port. Alternatively, config may be given as well if needed.

Parameters

port

Port on which to run the service

config

The individual service's config to use. It can be eaither a hash of key => value pairs, or a YAML-formatted string. Note that the complete configuration will be assembled using the bits given here and common node service configuration directives. Default: {}

module

The service's start-up module. Services based on service-template-node do not need to change this. Default: ./app.js

entrypoint

If the service's starter module exports a specific function that should be used on start-up, set this parameter to the function's name. Default: ''

script

The script used for starting the service. Default: server.js

git_remote

The git clone URL. Needs to be set only if the service is to be cloned from a source different than Gerrit. Default: undef

log_level

The service's log level. Default: $::service::log_level

environment

Extra environment variables to set in the systemd config template, in a key-value format.

Examples

To set up a service named myservice on port 8520 and with a templated configuration, use:

service::node { 'myservice':
    port   => 8520,
    config => template('myservice/config.yaml.erb'),
}

Likewise, you can supply the configuration directly as a hash:

service::node { 'myservice':
    port   => 8520,
    config => {
        param1 => 'val1',
        param2 => $myvar
    },
}

Parameters:

  • port (Any)
  • config (Any) (defaults to: {})
  • module (Any) (defaults to: './app.js')
  • entrypoint (Any) (defaults to: '')
  • script (Any) (defaults to: 'server.js')
  • git_remote (Any) (defaults to: undef)
  • log_level (Any) (defaults to: undef)
  • environment (Any) (defaults to: {})


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# File 'puppet/modules/service/manifests/node.pp', line 62

define service::node(
    $port,
    $config       = {},
    $module       = './app.js',
    $entrypoint   = '',
    $script       = 'server.js',
    $git_remote   = undef,
    $log_level    = undef,
    $environment  = {},
) {

    require ::service

    require ::npm
    require ::npm::globals

    # we do not allow empty names
    unless $title and size($title) > 0 {
        fail('No name for this resource given!')
    }

    # sanity check since a default port cannot be assigned
    unless $port and $port =~ Integer {
        fail('Service port must be specified and must be a number!')
    }

    # set up the remote URL
    $remote = $git_remote ? {
        undef   => sprintf($::git::urlformat, "mediawiki/services/${title}"),
        default => $git_remote
    }

    # the service's location
    $dir = "${::service::root_dir}/${title}"
    # the local log file name
    $log_file = "${::service::log_dir}/${title}.log"
    # set the log level
    $loglev = $log_level ? {
        undef   => $::service::log_level,
        default => $log_level
    }
    # ensure the RB port is defined for the config
    $restbase_port = defined(Class['restbase']) ? {
        true    => $::restbase::port,
        default => 7231,
    }

    # the repo
    git::clone { $title:
        directory => $dir,
        remote    => $remote,
    }

    # install the dependencies
    npm::install { $dir:
        directory => $dir,
        require   => Git::Clone[$title],
    }

    # the service's configuration file
    file { "${title}_config_yaml":
        ensure  => present,
        owner   => $::share_owner,
        group   => $::share_group,
        mode    => '0664',
        path    => "${dir}/config.vagrant.yaml",
        content => merge_config(
            template('service/node/config.yaml.erb'),
            $config
        ),
        require => Git::Clone[$title],
    }

    # set the log file's permissions
    file { $log_file:
        ensure => present,
        mode   => '0666',
        owner  => $::share_owner,
        group  => $::share_group,
    }

    # log rotation
    file { "/etc/logrotate.d/${title}":
        content => template('service/logrotate.erb'),
        owner   => 'root',
        group   => 'root',
        mode    => '0444',
    }

    # schedule the service for git-updates via vagrant git-update
    service::gitupdate { $title:
        type    => 'nodejs',
        update  => true,
        restart => true,
    }

    # the service definition
    systemd::service { $title:
        template_name      => 'node',
        service_params     => {
            subscribe => [
                File["${title}_config_yaml"],
                Npm::Install[$dir],
            ],
        },
        epp_template       => true,
        template_variables => {
            title       => $title,
            uptitle     => inline_template('<%= @title.gsub(/[^a-zA-Z0-9_]/, "_").upcase %>'),
            dir         => $dir,
            port        => $port,
            script      => $script,
            environment => $environment
        },
        require            => Git::Clone[$title],
    }
}