Module: KubernetesMetadata::Common

Included in:
Fluent::Plugin::KubernetesMetadataFilter, WatchNamespaces, WatchPods
Defined in:
lib/fluent/plugin/kubernetes_metadata_common.rb

Defined Under Namespace

Classes: GoneError

Instance Method Summary collapse

Instance Method Details

#match_annotations(annotations) ⇒ Object 



29
30
31
32
33
34
35
36
37
38
39
 
# File 'lib/fluent/plugin/kubernetes_metadata_common.rb', line 29

def match_annotations(annotations)
  result = {}
  @annotations_regexps.each do |regexp|
    annotations.each do |key, value|
      if ::Fluent::StringUtil.match_regexp(regexp, key.to_s)
        result[key] = value
      end
    end
  end
  result
end

#parse_namespace_metadata(namespace_object) ⇒ Object 



41
42
43
44
45
46
47
48
49
50
51
52
53
54
 
# File 'lib/fluent/plugin/kubernetes_metadata_common.rb', line 41

def parse_namespace_metadata(namespace_object)
  labels = ''
  labels = syms_to_strs(namespace_object[:metadata][:labels].to_h) unless (@skip_labels || @skip_namespace_labels)

  annotations = match_annotations(syms_to_strs(namespace_object[:metadata][:annotations].to_h))

  kubernetes_metadata = {
    'namespace_id' => namespace_object[:metadata][:uid],
    'creation_timestamp' => namespace_object[:metadata][:creationTimestamp]
  }
  kubernetes_metadata['namespace_labels'] = labels unless labels.empty?
  kubernetes_metadata['namespace_annotations'] = annotations unless annotations.empty?
  kubernetes_metadata
end

#parse_pod_metadata(pod_object) ⇒ Object 



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
109
110
111
112
113
 
# File 'lib/fluent/plugin/kubernetes_metadata_common.rb', line 56

def parse_pod_metadata(pod_object)
  labels = ''
  labels = syms_to_strs(pod_object[:metadata][:labels].to_h) unless (@skip_labels || @skip_pod_labels)

  annotations = match_annotations(syms_to_strs(pod_object[:metadata][:annotations].to_h))

  # collect container information
  container_meta = {}
  begin
    pod_object[:status][:containerStatuses].each do |container_status|
      container_id = (container_status[:containerID]||"").sub(%r{^[-_a-zA-Z0-9]+://}, '')
      key = container_status[:name]
      container_meta[key] = if @skip_container_metadata
                                       {
                                         'name' => container_status[:name]
                                       }
                                     else
                                       {
                                         'name' => container_status[:name],
                                         'image' => container_status[:image],
                                         'image_id' => container_status[:imageID],
                                         :containerID => container_id
                                       }
                                     end
    end if pod_object[:status] && pod_object[:status][:containerStatuses]
  rescue StandardError=>e
    log.warn("parsing container meta information failed for: #{pod_object[:metadata][:namespace]}/#{pod_object[:metadata][:name]}: #{e}")
  end

  # collect pod controller information
  controller_meta = {}
  begin
    pod_object[:metadata][:ownerReferences].each do |owner_reference|
      controller_meta['kind'] = owner_reference[:kind]
      controller_meta['name'] = owner_reference[:name]
      if owner_reference[:kind] == "ReplicaSet"
        controller_meta['name'] = owner_reference[:name].rpartition('-').first
      end
      break if owner_reference[:controller]
    end if pod_object[:metadata][:ownerReferences]
  rescue StandardError=>e
    log.warn("parsing ownerReferences information failed for: #{pod_object[:metadata][:namespace]}/#{pod_object[:metadata][:name]}: #{e}")
  end

  kubernetes_metadata = {
    'namespace_name' => pod_object[:metadata][:namespace],
    'pod_id' => pod_object[:metadata][:uid],
    'pod_name' => pod_object[:metadata][:name],
    'pod_ip' => pod_object[:status][:podIP],
    'containers' => syms_to_strs(container_meta),
    'controller' => syms_to_strs(controller_meta),
    'host' => pod_object[:spec][:nodeName]
  }
  kubernetes_metadata['annotations'] = annotations unless annotations.empty?
  kubernetes_metadata['labels'] = labels unless labels.empty?
  kubernetes_metadata['master_url'] = @kubernetes_url unless @skip_master_url
  kubernetes_metadata
end

#syms_to_strs(hsh) ⇒ Object 



115
116
117
118
119
120
121
122
123
124
125
126
127
128
 
# File 'lib/fluent/plugin/kubernetes_metadata_common.rb', line 115

def syms_to_strs(hsh)
  newhsh = {}
  hsh.each_pair do |kk, vv|
    if vv.is_a?(Hash)
      vv = syms_to_strs(vv)
    end
    if kk.is_a?(Symbol)
      newhsh[kk.to_s] = vv
    else
      newhsh[kk] = vv
    end
  end
  newhsh
end