Created
October 18, 2013 15:17
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FortiGate の CSV format な syslog を parse する fluentd plugin
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module Fluent | |
class FortigateSyslogParseOutput < Output | |
Fluent::Plugin.register_output('forti_log_parser', self) | |
config_param :remove_prefix, :string, :default => nil | |
config_param :add_prefix, :string, :default => nil | |
config_param :message_key, :string, :default => 'message' | |
config_param :keys, :string, :default => nil | |
config_param :remove_keys, :string, :default => nil | |
def configure(conf) | |
super | |
if @remove_prefix | |
@removed_prefix_string = @remove_prefix + '.' | |
@removed_length = @removed_prefix_string.length | |
end | |
if @add_prefix | |
@added_prefix_string = @add_prefix + '.' | |
end | |
if @keys | |
if @remove_keys | |
raise ConfigError, "forti_log_parser: 'keys' and 'remove_keys' parameters are exclusive" | |
end | |
@keys = Hash[@keys.split(',').map {|x| [x, 1] }] | |
end | |
if @remove_keys | |
@remove_keys = Hash[@remove_keys.split(',').map {|x| [x, 1] }] | |
end | |
end | |
def emit(tag, es, chain) | |
_tag = tag.clone | |
if @remove_prefix and | |
((tag.start_with?(@removed_prefix_string) && tag.length > @removed_length) || tag == @remove_prefix) | |
tag = tag[@removed_length..-1] || '' | |
end | |
if @add_prefix | |
tag = tag && tag.length > 0 ? @added_prefix_string + tag : @add_prefix | |
end | |
es.each do |time, record| | |
time, record = parse(record) | |
Engine.emit(tag, time, record) | |
end | |
chain.next | |
end | |
def parse(record) | |
message = record[@message_key] | |
record.delete(@message_key) | |
data = message.split(/\s+/, 5).pop | |
data.gsub(/\G[^,=]+=(:?"[^"]*"|[^,]+)(:?,|$)/) { |kv| | |
(k, v) = kv.strip.split(/=/, 2) | |
if (k == 'date' or k == 'time' or | |
(@keys and @keys.has_key?(k)) or | |
(@remove_keys and not @remove_keys.has_key?(k)) or | |
(!@keys and !@remove_keys)) | |
record[k] = v.gsub(/,$/, '').gsub(/^"(.*)"$/, '\1') | |
end | |
} | |
time = Time.strptime(record["date"] + " " + record["time"], '%Y-%m-%d %H: %M:%S').to_i | |
record.delete("date") | |
record.delete("time") | |
[ time, record ] | |
end | |
end | |
end |
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