Module: Fluent::Mixin::ConfigPlaceholders
- Defined in:
- lib/fluent/mixin/config_placeholders.rb
Constant Summary collapse
- PLACEHOLDERS_DEFAULT =
and :percent
[ :dollar, :underscore ]
Instance Attribute Summary collapse
-
#hostname ⇒ Object
Returns the value of attribute hostname.
Instance Method Summary collapse
- #configure(conf) ⇒ Object
- #has_replace_pattern?(value) ⇒ Boolean
- #replace(map, value) ⇒ Object
- #uuid_hostname(hostname) ⇒ Object
-
#uuid_random ⇒ Object
$uuid:timestamp , %uuid:timestamp , UUID_TIMESTAMP UUIDTools::UUID.timestamp_create => #<UUID:0x2adfdc UUID:64a5189c-25b3-11da-a97b-00c04fd430c8>.
- #uuid_timestamp ⇒ Object
Instance Attribute Details
#hostname ⇒ Object
Returns the value of attribute hostname.
7 8 9 |
# File 'lib/fluent/mixin/config_placeholders.rb', line 7 def hostname @hostname end |
Instance Method Details
#configure(conf) ⇒ Object
50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 |
# File 'lib/fluent/mixin/config_placeholders.rb', line 50 def configure(conf) # Element#has_key? inserts key name into 'used' list, so we should not use that method... hostname = if conf.keys.include?('hostname') && has_replace_pattern?( conf.fetch('hostname') ) Socket.gethostname elsif conf.keys.include?('hostname') conf['hostname'] else Socket.gethostname end placeholders = self.respond_to?(:placeholders) ? self.placeholders : PLACEHOLDERS_DEFAULT mapping = {} placeholders.each do |p| case p when :dollar mapping.update({ '${hostname}' => lambda{ hostname }, '${uuid}' => lambda{ uuid_random() }, '${uuid:random}' => lambda{ uuid_random() }, '${uuid:hostname}' => lambda{ uuid_hostname(hostname) }, '${uuid:timestamp}' => lambda{ () }, }) when :percent mapping.update({ '%{hostname}' => lambda{ hostname }, '%{uuid}' => lambda{ uuid_random() }, '%{uuid:random}' => lambda{ uuid_random() }, '%{uuid:hostname}' => lambda{ uuid_hostname(hostname) }, '%{uuid:timestamp}' => lambda{ () }, }) when :underscore mapping.update({ '__HOSTNAME__' => lambda{ hostname }, '__UUID__' => lambda{ uuid_random() }, '__UUID_RANDOM__' => lambda{ uuid_random() }, '__UUID_HOSTNAME__' => lambda{ uuid_hostname(hostname) }, '__UUID_TIMESTAMP__' => lambda{ () }, }) else raise ArgumentError, "unknown placeholder format: #{p}" end end check_element = ->(map, c) { c.arg = replace(map, c.arg) c.keys.each do |k| v = c.fetch(k, nil) if v and v.is_a? String c[k] = replace(map, v) end end c.elements.each{|e| check_element.call(map,e)} } check_element.call(mapping,conf) super end |
#has_replace_pattern?(value) ⇒ Boolean
44 45 46 47 48 |
# File 'lib/fluent/mixin/config_placeholders.rb', line 44 def has_replace_pattern?(value) value =~ /\$\{(?:hostname|uuid:[a-z]+)\}/ || value =~ /\%\{(?:hostname|uuid:[a-z]+)\}/ || value =~ /__(?:HOSTNAME|UUID_[A-Z]+)__/ end |
#replace(map, value) ⇒ Object
40 41 42 |
# File 'lib/fluent/mixin/config_placeholders.rb', line 40 def replace(map, value) map.reduce(value){|r,p| r.gsub(p[0], p[1].call())} end |
#uuid_hostname(hostname) ⇒ Object
30 31 32 33 |
# File 'lib/fluent/mixin/config_placeholders.rb', line 30 def uuid_hostname(hostname) require 'uuidtools' UUIDTools::UUID.sha1_create(UUIDTools::UUID_DNS_NAMESPACE, hostname).to_s end |
#uuid_random ⇒ Object
$uuid:timestamp , %uuid:timestamp , UUID_TIMESTAMP UUIDTools::UUID.timestamp_create
> #<UUID:0x2adfdc UUID:64a5189c-25b3-11da-a97b-00c04fd430c8>
25 26 27 28 |
# File 'lib/fluent/mixin/config_placeholders.rb', line 25 def uuid_random require 'uuidtools' UUIDTools::UUID.random_create.to_s end |
#uuid_timestamp ⇒ Object
35 36 37 38 |
# File 'lib/fluent/mixin/config_placeholders.rb', line 35 def require 'uuidtools' UUIDTools::UUID..to_s end |