1 class Node < ArvadosModel
4 include CommonApiTemplate
6 serialize :properties, Hash
7 before_validation :ensure_ping_secret
8 after_update :dns_server_update
10 # Only a controller can figure out whether or not the current API tokens
11 # have access to the associated Job. They're expected to set
12 # job_readable=true if the Job UUID can be included in the API response.
13 belongs_to(:job, foreign_key: :job_uuid, primary_key: :uuid)
14 attr_accessor :job_readable
18 @@dns_server_conf_dir = Rails.configuration.dns_server_conf_dir
19 @@dns_server_conf_template = Rails.configuration.dns_server_conf_template
20 @@dns_server_reload_command = Rails.configuration.dns_server_reload_command
21 @@uuid_prefix = Rails.configuration.uuid_prefix
22 @@domain = Rails.configuration.compute_node_domain rescue `hostname --domain`.strip
23 @@nameservers = Rails.configuration.compute_node_nameservers
25 api_accessible :user, :extend => :common do |t|
32 t.add :api_job_uuid, as: :job_uuid
33 t.add :crunch_worker_state
36 api_accessible :superuser, :extend => :user do |t|
39 t.add lambda { |x| @@nameservers }, :as => :nameservers
47 job_readable ? job_uuid : nil
50 def crunch_worker_state
51 return 'down' if slot_number.nil?
52 case self.info.andand['slurm_state']
64 if db_current_time - self.created_at > 5.minutes
69 elsif db_current_time - self.last_ping_at > 1.hours
77 raise "must have :ip and :ping_secret" unless o[:ip] and o[:ping_secret]
79 if o[:ping_secret] != self.info['ping_secret']
80 logger.info "Ping: secret mismatch: received \"#{o[:ping_secret]}\" != \"#{self.info['ping_secret']}\""
81 raise ArvadosModel::UnauthorizedError.new("Incorrect ping_secret")
84 current_time = db_current_time
85 self.last_ping_at = current_time
87 @bypass_arvados_authorization = true
90 if self.ip_address.nil?
91 logger.info "#{self.uuid} ip_address= #{o[:ip]}"
92 self.ip_address = o[:ip]
93 self.first_ping_at = current_time
96 # Record instance ID if not already known
97 if o[:ec2_instance_id]
98 if !self.info['ec2_instance_id']
99 self.info['ec2_instance_id'] = o[:ec2_instance_id]
100 elsif self.info['ec2_instance_id'] != o[:ec2_instance_id]
101 logger.debug "Multiple nodes have credentials for #{self.uuid}"
102 raise "#{self.uuid} is already running at #{self.info['ec2_instance_id']} so rejecting ping from #{o[:ec2_instance_id]}"
107 if self.slot_number.nil?
110 self.slot_number = try_slot
114 rescue ActiveRecord::RecordNotUnique
117 raise "No available node slots" if try_slot == MAX_SLOTS
119 self.hostname = self.class.hostname_for_slot(self.slot_number)
122 # Record other basic stats
123 ['total_cpu_cores', 'total_ram_mb', 'total_scratch_mb'].each do |key|
124 if value = (o[key] or o[key.to_sym])
125 self.properties[key] = value.to_i
127 self.properties.delete(key)
136 def ensure_ping_secret
137 self.info['ping_secret'] ||= rand(2**256).to_s(36)
140 def dns_server_update
141 if self.hostname_changed? or self.ip_address_changed?
142 if not self.ip_address.nil?
143 stale_conflicting_nodes = Node.where('id != ? and ip_address = ? and last_ping_at < ?',self.id,self.ip_address,10.minutes.ago)
144 if not stale_conflicting_nodes.empty?
145 # One or more stale compute node records have the same IP address as the new node.
146 # Clear the ip_address field on the stale nodes.
147 stale_conflicting_nodes.each do |stale_node|
148 stale_node.ip_address = nil
153 if self.hostname and self.ip_address
154 self.class.dns_server_update(self.hostname, self.ip_address)
159 def self.dns_server_update(hostname, ip_address)
160 return unless @@dns_server_conf_dir and @@dns_server_conf_template
161 ptr_domain = ip_address.
162 split('.').reverse.join('.').concat('.in-addr.arpa')
163 hostfile = File.join @@dns_server_conf_dir, "#{hostname}.conf"
166 template = IO.read(@@dns_server_conf_template)
168 STDERR.puts "Unable to read dns_server_conf_template #{@@dns_server_conf_template}: #{e.message}"
172 populated = template % {hostname:hostname, uuid_prefix:@@uuid_prefix, ip_address:ip_address, ptr_domain:ptr_domain}
175 File.open hostfile, 'w' do |f|
179 STDERR.puts "Unable to write #{hostfile}: #{e.message}"
182 File.open(File.join(@@dns_server_conf_dir, 'restart.txt'), 'w') do |f|
183 # this will trigger a dns server restart
184 f.puts @@dns_server_reload_command
188 def self.hostname_for_slot(slot_number)
189 "compute#{slot_number}"
192 # At startup, make sure all DNS entries exist. Otherwise, slurmctld
193 # will refuse to start.
194 if @@dns_server_conf_dir and @@dns_server_conf_template
195 (0..MAX_SLOTS-1).each do |slot_number|
196 hostname = hostname_for_slot(slot_number)
197 hostfile = File.join @@dns_server_conf_dir, "#{hostname}.conf"
198 if !File.exists? hostfile
199 n = Node.where(:slot_number => slot_number).first
200 if n.nil? or n.ip_address.nil?
201 dns_server_update(hostname, '127.40.4.0')
203 dns_server_update(hostname, n.ip_address)
209 def permission_to_update
210 @bypass_arvados_authorization or super
213 def permission_to_create
214 current_user and current_user.is_admin