Class: Bolt::PuppetDB::Client

Inherits:
Object
  • Object
show all
Defined in:
lib/bolt/puppetdb/client.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(config) ⇒ Client 



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# File 'lib/bolt/puppetdb/client.rb', line 12

def initialize(config)
  @config = config
  @bad_urls = []
  @current_url = nil
  @logger = Logging.logger[self]
end

Instance Attribute Details

#config ⇒ Object (readonly)

Returns the value of attribute config.



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# File 'lib/bolt/puppetdb/client.rb', line 10

def config
  @config
end

Instance Method Details

#facts_for_node(certnames) ⇒ Object

This method expects an array of certnames to get facts for



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# File 'lib/bolt/puppetdb/client.rb', line 32

def facts_for_node(certnames)
  return {} if certnames.empty? || certnames.nil?

  certnames.uniq!
  name_query = certnames.map { |c| ["=", "certname", c] }
  name_query.insert(0, "or")
  result = make_query(name_query, 'inventory')

  result&.each_with_object({}) do |node, coll|
    coll[node['certname']] = node['facts']
  end
end

#headers ⇒ Object 



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# File 'lib/bolt/puppetdb/client.rb', line 104

def headers
  headers = { 'Content-Type' => 'application/json' }
  headers['X-Authentication'] = @config.token if @config.token
  headers
end

#http_client ⇒ Object 



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# File 'lib/bolt/puppetdb/client.rb', line 76

def http_client
  return @http if @http
  # lazy-load expensive gem code
  require 'httpclient'
  @http = HTTPClient.new
  @http.ssl_config.set_client_cert_file(@config.cert, @config.key) if @config.cert
  @http.ssl_config.add_trust_ca(@config.cacert)

  @http
end

#make_query(query, path = nil) ⇒ Object 



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# File 'lib/bolt/puppetdb/client.rb', line 45

def make_query(query, path = nil)
  body = JSON.generate(query: query)
  url = "#{uri}/pdb/query/v4"
  url += "/#{path}" if path

  begin
    response = http_client.post(url, body: body, header: headers)
  rescue StandardError => e
    raise Bolt::PuppetDBFailoverError, "Failed to query PuppetDB: #{e}"
  end

  if response.code != 200
    msg = "Failed to query PuppetDB: #{response.body}"
    if response.code == 400
      raise Bolt::PuppetDBError, msg
    else
      raise Bolt::PuppetDBFailoverError, msg
    end
  end

  begin
    JSON.parse(response.body)
  rescue JSON::ParserError
    raise Bolt::PuppetDBError, "Unable to parse response as JSON: #{response.body}"
  end
rescue Bolt::PuppetDBFailoverError => e
  @logger.error("Request to puppetdb at #{@current_url} failed with #{e}.")
  reject_url
  make_query(query, path)
end

#query_certnames(query) ⇒ Object 



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# File 'lib/bolt/puppetdb/client.rb', line 19

def query_certnames(query)
  return [] unless query

  results = make_query(query)

  if results&.first && !results.first&.key?('certname')
    fields = results.first&.keys
    raise Bolt::PuppetDBError, "Query results did not contain a 'certname' field: got #{fields.join(', ')}"
  end
  results&.map { |result| result['certname'] }&.uniq
end

#reject_url ⇒ Object 



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# File 'lib/bolt/puppetdb/client.rb', line 87

def reject_url
  @bad_urls << @current_url if @current_url
  @current_url = nil
end

#uri ⇒ Object 



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# File 'lib/bolt/puppetdb/client.rb', line 92

def uri
  @current_url ||= (@config.server_urls - @bad_urls).first
  unless @current_url
    msg = "Failed to connect to all PuppetDB server_urls: #{@config.server_urls.to_a.join(', ')}."
    raise Bolt::PuppetDBError, msg
  end

  uri = URI.parse(@current_url)
  uri.port ||= 8081
  uri
end