Puppet Class: simp_logstash::input::syslog
- Defined in:
- manifests/input/syslog.pp
Overview
A Logstash input for Syslog messages
Though this class has a great deal repeated with the other input classes, they remain separate in the event that variables need to be added in the future for ERB processing.
It allows you to encrypt traffic to the LogStash log collector just like the SIMP rsyslog remote configuration.
IPTables NAT rules are modified so that LogStash can run as a normal user while collecting syslog traffic from other hosts.
This is currently configured as a catch-all type of system. There is no output filtering. If you need logstash filters or additional inputs/outputs, you will need to configure them separately.
See simp_logstash::clean if you want to automatically prune your logs to conserve ElasticSearch storage space.
Note:
This class is incompatible with the SIMP rsyslog::stock::server class!
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# File 'manifests/input/syslog.pp', line 91
class simp_logstash::input::syslog (
$add_field = {},
$codec = '',
$facility_labels = [],
$host = '127.0.0.1',
$locale = '',
$severity_labels = [
'Emergency',
'Alert',
'Critical',
'Error',
'Warning',
'Notice',
'Informational',
'Debug'
],
$lstash_tags = '',
$timezone = '',
$lstash_type = '',
$use_labels = true,
$order = '50',
$content = '',
$client_nets = defined('$::client_nets') ? { true => getvar('::client_nets'), default => hiera('client_nets','127.0.0.1') },
$listen_plain_tcp = false,
$listen_plain_udp = false,
$tcp_port = '514',
$udp_port = '514',
$daemon_port = '51400',
$stunnel_syslog_input = true,
$stunnel_syslog_port = '6514',
$simp_sysctl = true,
$simp_iptables = defined('$::use_iptables') ? { true => getvar('::use_iptables'), default => hiera('use_iptables',true) }
) {
validate_hash($add_field)
validate_string($codec)
validate_array($facility_labels)
validate_net_list($host)
validate_string($locale)
validate_array($severity_labels)
validate_string($lstash_tags)
validate_string($timezone)
validate_string($lstash_type)
validate_bool($use_labels)
validate_integer($order)
validate_string($content)
validate_net_list($client_nets)
validate_bool($listen_plain_tcp)
validate_bool($listen_plain_udp)
validate_port($udp_port)
validate_port($tcp_port)
validate_port($daemon_port)
validate_bool($stunnel_syslog_input)
validate_port($stunnel_syslog_port)
validate_bool($simp_sysctl)
validate_bool($simp_iptables)
### Common material to all inputs
include '::simp_logstash'
$_component_name = 'syslog'
$_group = 'input'
$_group_order = $::simp_logstash::config_order[$_group]
if empty($content) {
$_content = template("${module_name}/${_group}/${_component_name}.erb")
}
else {
$_content = $content
}
file { "${::simp_logstash::config_prefix}-${_group_order}_${_group}-${order}-${_component_name}${::simp_logstash::config_suffix}":
ensure => 'file',
owner => 'root',
group => $::logstash::logstash_group,
mode => '0640',
content => $_content,
notify => Class['logstash::service']
}
### End common material
if $simp_iptables {
if $listen_plain_tcp or $listen_plain_udp {
if $listen_plain_tcp {
# IPTables rules so that LogStash doesn't have to run as root.
iptables_rule { 'tcp_logstash_syslog_redirect':
table => 'nat',
absolute => true,
first => true,
order => '1',
header => false,
content => "-A PREROUTING -p tcp -m tcp --dport ${tcp_port} -j DNAT --to-destination ${host}:${daemon_port}"
}
}
if $listen_plain_udp {
# IPTables rules so that LogStash doesn't have to run as root.
iptables_rule { 'udp_logstash_syslog_redirect':
table => 'nat',
absolute => true,
first => true,
order => '1',
header => false,
content => "-A PREROUTING -p udp -m udp --dport ${udp_port} -j DNAT --to-destination ${host}:${daemon_port}"
}
}
if $simp_sysctl {
include '::sysctl'
# Allow the iptables NAT rules to work properly.
sysctl::value { 'net.ipv4.conf.all.route_localnet': value => '1' }
}
}
if $listen_plain_tcp {
iptables::add_tcp_stateful_listen { 'logstash_syslog_tcp':
client_nets => $client_nets,
dports => $tcp_port
}
iptables_rule { 'logstash_syslog_tcp_allow':
content => "-d ${host} -p tcp -m tcp -m multiport --dports ${daemon_port} -j ACCEPT"
}
}
if $listen_plain_udp {
iptables::add_udp_listen { 'logstash_syslog_udp':
client_nets => $client_nets,
dports => $udp_port
}
iptables_rule { 'logstash_syslog_udp_allow':
content => "-d ${host} -p udp -m udp -m multiport --dports ${daemon_port} -j ACCEPT"
}
}
}
if $stunnel_syslog_input {
include '::stunnel'
include '::tcpwrappers'
stunnel::add { 'logstash_syslog_tls':
client => false,
connect => [$daemon_port],
accept => $stunnel_syslog_port
}
tcpwrappers::allow { ['logstash_syslog','logstash_syslog_tls']: pattern => 'ALL' }
}
}
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