1 # Copyright (C) The Arvados Authors. All rights reserved.
3 # SPDX-License-Identifier: AGPL-3.0
7 class Node < ArvadosModel
10 include CommonApiTemplate
12 # Posgresql JSONB columns should NOT be declared as serialized, Rails 5
13 # already know how to properly treat them.
14 attribute :properties, :jsonbHash, default: {}
15 attribute :info, :jsonbHash, default: {}
17 before_validation :ensure_ping_secret
18 after_update :dns_server_update
20 # Only a controller can figure out whether or not the current API tokens
21 # have access to the associated Job. They're expected to set
22 # job_readable=true if the Job UUID can be included in the API response.
23 belongs_to(:job, foreign_key: :job_uuid, primary_key: :uuid)
24 attr_accessor :job_readable
26 UNUSED_NODE_IP = '127.40.4.0'
29 api_accessible :user, :extend => :common do |t|
36 t.add :api_job_uuid, as: :job_uuid
37 t.add :crunch_worker_state
40 api_accessible :superuser, :extend => :user do |t|
43 t.add lambda { |x| Rails.configuration.Containers.SLURM.Managed.ComputeNodeNameservers.keys }, :as => :nameservers
47 @bypass_arvados_authorization = false
51 super || Rails.configuration.Containers.SLURM.Managed.ComputeNodeDomain
55 job_readable ? job_uuid : nil
58 def crunch_worker_state
59 return 'down' if slot_number.nil?
60 case self.info.andand['slurm_state']
61 when 'alloc', 'comp', 'mix', 'drng'
72 if db_current_time - self.created_at > 5.minutes
77 elsif db_current_time - self.last_ping_at > 1.hours
85 raise "must have :ip and :ping_secret" unless o[:ip] and o[:ping_secret]
87 if o[:ping_secret] != self.info['ping_secret']
88 logger.info "Ping: secret mismatch: received \"#{o[:ping_secret]}\" != \"#{self.info['ping_secret']}\""
89 raise ArvadosModel::UnauthorizedError.new("Incorrect ping_secret")
92 current_time = db_current_time
93 self.last_ping_at = current_time
95 @bypass_arvados_authorization = true
98 if self.ip_address.nil?
99 logger.info "#{self.uuid} ip_address= #{o[:ip]}"
100 self.ip_address = o[:ip]
101 self.first_ping_at = current_time
104 # Record instance ID if not already known
105 if o[:ec2_instance_id]
106 if !self.info['ec2_instance_id']
107 self.info['ec2_instance_id'] = o[:ec2_instance_id]
108 elsif self.info['ec2_instance_id'] != o[:ec2_instance_id]
109 logger.debug "Multiple nodes have credentials for #{self.uuid}"
110 raise "#{self.uuid} is already running at #{self.info['ec2_instance_id']} so rejecting ping from #{o[:ec2_instance_id]}"
116 # Record other basic stats
117 ['total_cpu_cores', 'total_ram_mb', 'total_scratch_mb'].each do |key|
118 if value = (o[key] or o[key.to_sym])
119 self.properties[key] = value.to_i
121 self.properties.delete(key)
129 return if self.slot_number.andand > 0
131 self.slot_number = self.class.available_slot_number
132 if self.slot_number.nil?
133 raise "No available node slots"
137 return assign_hostname
138 rescue ActiveRecord::RecordNotUnique
147 if self.hostname.nil? and Rails.configuration.Containers.SLURM.Managed.AssignNodeHostname
148 self.hostname = self.class.hostname_for_slot(self.slot_number)
152 def self.available_slot_number
153 # Join the sequence 1..max with the nodes table. Return the first
154 # (i.e., smallest) value that doesn't match the slot_number of any
156 connection.exec_query('SELECT n FROM generate_series(1, $1) AS slot(n)
157 LEFT JOIN nodes ON n=slot_number
158 WHERE slot_number IS NULL
161 'Node.available_slot_number',
162 # [col_id, val] for $1 vars:
164 ).rows.first.andand.first
167 def ensure_ping_secret
168 self.info['ping_secret'] ||= rand(2**256).to_s(36)
171 def dns_server_update
172 if saved_change_to_ip_address? && ip_address
173 Node.where('id != ? and ip_address = ?',
174 id, ip_address).each do |stale_node|
175 # One or more(!) stale node records have the same IP address
176 # as the new node. Clear the ip_address field on the stale
177 # nodes. Otherwise, we (via SLURM) might inadvertently connect
178 # to the new node using the old node's hostname.
179 stale_node.update_attributes!(ip_address: nil)
182 if hostname_before_last_save && saved_change_to_hostname?
183 self.class.dns_server_update(hostname_before_last_save, UNUSED_NODE_IP)
185 if hostname && (saved_change_to_hostname? || saved_change_to_ip_address?)
186 self.class.dns_server_update(hostname, ip_address || UNUSED_NODE_IP)
190 def self.dns_server_update hostname, ip_address
193 ptr_domain = ip_address.
194 split('.').reverse.join('.').concat('.in-addr.arpa')
198 uuid_prefix: Rails.configuration.ClusterID,
199 ip_address: ip_address,
200 ptr_domain: ptr_domain,
203 if (!Rails.configuration.Containers.SLURM.Managed.DNSServerConfDir.to_s.empty? and
204 !Rails.configuration.Containers.SLURM.Managed.DNSServerConfTemplate.to_s.empty?)
208 template = IO.read(Rails.configuration.Containers.SLURM.Managed.DNSServerConfTemplate)
209 rescue IOError, SystemCallError => e
210 logger.error "Reading #{Rails.configuration.Containers.SLURM.Managed.DNSServerConfTemplate}: #{e.message}"
214 hostfile = File.join Rails.configuration.Containers.SLURM.Managed.DNSServerConfDir, "#{hostname}.conf"
215 Tempfile.open(["#{hostname}-", ".conf.tmp"],
216 Rails.configuration.Containers.SLURM.Managed.DNSServerConfDir) do |f|
218 f.puts template % template_vars
220 File.rename tmpfile, hostfile
221 rescue IOError, SystemCallError => e
222 logger.error "Writing #{hostfile}: #{e.message}"
225 if tmpfile and File.file? tmpfile
226 # Cleanup remaining temporary file.
232 if !Rails.configuration.Containers.SLURM.Managed.DNSServerUpdateCommand.empty?
233 cmd = Rails.configuration.Containers.SLURM.Managed.DNSServerUpdateCommand % template_vars
235 logger.error "dns_server_update_command #{cmd.inspect} failed: #{$?}"
240 if (!Rails.configuration.Containers.SLURM.Managed.DNSServerConfDir.to_s.empty? and
241 !Rails.configuration.Containers.SLURM.Managed.DNSServerReloadCommand.to_s.empty?)
242 restartfile = File.join(Rails.configuration.Containers.SLURM.Managed.DNSServerConfDir, 'restart.txt')
244 File.open(restartfile, 'w') do |f|
245 # Typically, this is used to trigger a dns server restart
246 f.puts Rails.configuration.Containers.SLURM.Managed.DNSServerReloadCommand
248 rescue IOError, SystemCallError => e
249 logger.error "Unable to write #{restartfile}: #{e.message}"
257 def self.hostname_for_slot(slot_number)
258 config = Rails.configuration.Containers.SLURM.Managed.AssignNodeHostname
260 return nil if !config
262 sprintf(config, {:slot_number => slot_number})
265 # At startup, make sure all DNS entries exist. Otherwise, slurmctld
266 # will refuse to start.
267 if (!Rails.configuration.Containers.SLURM.Managed.DNSServerConfDir.to_s.empty? and
268 !Rails.configuration.Containers.SLURM.Managed.DNSServerConfTemplate.to_s.empty? and
269 !Rails.configuration.Containers.SLURM.Managed.AssignNodeHostname.empty?)
271 (0..MAX_VMS-1).each do |slot_number|
272 hostname = hostname_for_slot(slot_number)
273 hostfile = File.join Rails.configuration.Containers.SLURM.Managed.DNSServerConfDir, "#{hostname}.conf"
274 if !File.exist? hostfile
275 n = Node.where(:slot_number => slot_number).first
276 if n.nil? or n.ip_address.nil?
277 dns_server_update(hostname, UNUSED_NODE_IP)
279 dns_server_update(hostname, n.ip_address)
285 def permission_to_update
286 @bypass_arvados_authorization or super
289 def permission_to_create
290 current_user and current_user.is_admin