Module: Enscalator::Helpers::Dns

Included in:
Enscalator::Helpers
Defined in:
lib/enscalator/helpers/dns.rb

Instance Method Summary collapse

Instance Method Details

#get_dns_records(zone_name: nil) ⇒ Object

Get existing DNS records

Parameters:

  • zone_name (String) (defaults to: nil) —

    name of the hosted zone



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# File 'lib/enscalator/helpers/dns.rb', line 7

def get_dns_records(zone_name: nil)
  client = route53_client(nil)
  zone = client.list_hosted_zones[:hosted_zones].find { |x| x.name == zone_name }
  records = client.list_resource_record_sets(hosted_zone_id: zone.id)
  records.values.flatten.map do |x|
    {
      name: x.name,
      type: x.type,
      records: x.resource_records.map(&:value)
    } if x.is_a?(Aws::Structure)
  end.compact
end

#upsert_dns_record(region: nil, zone_name: nil, record_name: nil, type: 'A', values: [], ttl: 300, suffix: '') ⇒ Object

Create DNS record in given hosted zone

Parameters:

  • region (String) (defaults to: nil) —

    aws valid region identifier

  • zone_name (String) (defaults to: nil) —

    name of the hosted zone

  • record_name (String) (defaults to: nil) —

    name of the dns record

  • type (String) (defaults to: 'A') —

    record type (NS, MX, CNAME and etc.)

  • values (Array) (defaults to: []) —

    list of record values

  • ttl (Integer) (defaults to: 300) —

    time to live

  • suffix (String) (defaults to: '') —

    additional identifier following region



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# File 'lib/enscalator/helpers/dns.rb', line 29

def upsert_dns_record(region: nil,
                      zone_name: nil,
                      record_name: nil,
                      type: 'A',
                      values: [],
                      ttl: 300,
                      suffix: '')
  client = route53_client(region: region)
  zone = client.list_hosted_zones[:hosted_zones].find { |x| x.name == zone_name }
  record_tokens = [record_name.gsub(zone_name, ''), region]
  record_tokens << suffix if suffix && !suffix.empty?
  record_name = [record_tokens.join, zone_name].join('.')

  client.change_resource_record_sets(
    hosted_zone_id: zone.id,
    change_batch: {
      comment: "dns record for #{record_name}",
      changes: [
        {
          action: 'UPSERT',
          resource_record_set: {
            name: record_name,
            type: type,
            resource_records: values.map { |x| { value: x } },
            ttl: ttl
          }
        }
      ]
    }
  )
end