Module: KubernetesMetadata::Common

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

Instance Method Summary collapse

Instance Method Details

#match_annotations(annotations) ⇒ Object 



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# File 'lib/fluent/plugin/kubernetes_metadata_common.rb', line 22

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 



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# File 'lib/fluent/plugin/kubernetes_metadata_common.rb', line 34

def parse_namespace_metadata(namespace_object)
  labels = String.new
  labels = syms_to_strs(namespace_object['metadata']['labels'].to_h) unless @skip_labels

  annotations = match_annotations(syms_to_strs(namespace_object['metadata']['annotations'].to_h))
  if @de_dot
    self.de_dot!(labels) unless @skip_labels
    self.de_dot!(annotations)
  end
  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?
  return kubernetes_metadata
end

#parse_pod_metadata(pod_object) ⇒ Object 



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# File 'lib/fluent/plugin/kubernetes_metadata_common.rb', line 52

def parse_pod_metadata(pod_object)
  labels = String.new
  labels = syms_to_strs(pod_object['metadata']['labels'].to_h) unless @skip_labels

  annotations = match_annotations(syms_to_strs(pod_object['metadata']['annotations'].to_h))
  if @de_dot
    self.de_dot!(labels) unless @skip_labels
    self.de_dot!(annotations)
  end

  # collect container informations
  container_meta = {}
  begin
    pod_object['status']['containerStatuses'].each do|container_status|
      # get plain container id (eg. docker://hash -> hash)
      container_id = container_status['containerID'].sub /^[-_a-zA-Z0-9]+:\/\//, ''
      unless @skip_container_metadata
        container_meta[container_id] = {
            'name' => container_status['name'],
            'image' => container_status['image'],
            'image_id' => container_status['imageID']
        }
      else
        container_meta[container_id] = {
            'name' => container_status['name']
        }
      end
    end
  rescue
    log.debug("parsing container meta information failed for: #{pod_object['metadata']['namespace']}/#{pod_object['metadata']['name']} ")
  end

  kubernetes_metadata = {
      'namespace_name' => pod_object['metadata']['namespace'],
      'pod_id'         => pod_object['metadata']['uid'],
      'pod_name'       => pod_object['metadata']['name'],
      'containers'     => syms_to_strs(container_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
  return kubernetes_metadata
end

#syms_to_strs(hsh) ⇒ Object 



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# File 'lib/fluent/plugin/kubernetes_metadata_common.rb', line 97

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