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.
24 foreign_key: 'job_uuid',
28 attr_accessor :job_readable
30 UNUSED_NODE_IP = '127.40.4.0'
33 api_accessible :user, :extend => :common do |t|
40 t.add :api_job_uuid, as: :job_uuid
41 t.add :crunch_worker_state
44 api_accessible :superuser, :extend => :user do |t|
47 t.add lambda { |x| Rails.configuration.Containers.SLURM.Managed.ComputeNodeNameservers.keys }, :as => :nameservers
51 @bypass_arvados_authorization = false
55 super || Rails.configuration.Containers.SLURM.Managed.ComputeNodeDomain
59 job_readable ? job_uuid : nil
62 def crunch_worker_state
63 return 'down' if slot_number.nil?
64 case self.info.andand['slurm_state']
65 when 'alloc', 'comp', 'mix', 'drng'
76 if db_current_time - self.created_at > 5.minutes
81 elsif db_current_time - self.last_ping_at > 1.hours
89 raise "must have :ip and :ping_secret" unless o[:ip] and o[:ping_secret]
91 if o[:ping_secret] != self.info['ping_secret']
92 logger.info "Ping: secret mismatch: received \"#{o[:ping_secret]}\" != \"#{self.info['ping_secret']}\""
93 raise ArvadosModel::UnauthorizedError.new("Incorrect ping_secret")
96 current_time = db_current_time
97 self.last_ping_at = current_time
99 @bypass_arvados_authorization = true
102 if self.ip_address.nil?
103 logger.info "#{self.uuid} ip_address= #{o[:ip]}"
104 self.ip_address = o[:ip]
105 self.first_ping_at = current_time
108 # Record instance ID if not already known
109 if o[:ec2_instance_id]
110 if !self.info['ec2_instance_id']
111 self.info['ec2_instance_id'] = o[:ec2_instance_id]
112 elsif self.info['ec2_instance_id'] != o[:ec2_instance_id]
113 logger.debug "Multiple nodes have credentials for #{self.uuid}"
114 raise "#{self.uuid} is already running at #{self.info['ec2_instance_id']} so rejecting ping from #{o[:ec2_instance_id]}"
120 # Record other basic stats
121 ['total_cpu_cores', 'total_ram_mb', 'total_scratch_mb'].each do |key|
122 if value = (o[key] or o[key.to_sym])
123 self.properties[key] = value.to_i
125 self.properties.delete(key)
133 return if self.slot_number.andand > 0
135 self.slot_number = self.class.available_slot_number
136 if self.slot_number.nil?
137 raise "No available node slots"
141 return assign_hostname
142 rescue ActiveRecord::RecordNotUnique
151 if self.hostname.nil? and Rails.configuration.Containers.SLURM.Managed.AssignNodeHostname
152 self.hostname = self.class.hostname_for_slot(self.slot_number)
156 def self.available_slot_number
157 # Join the sequence 1..max with the nodes table. Return the first
158 # (i.e., smallest) value that doesn't match the slot_number of any
160 connection.exec_query('SELECT n FROM generate_series(1, $1) AS slot(n)
161 LEFT JOIN nodes ON n=slot_number
162 WHERE slot_number IS NULL
165 'Node.available_slot_number',
168 ).rows.first.andand.first
171 def ensure_ping_secret
172 self.info['ping_secret'] ||= rand(2**256).to_s(36)
175 def dns_server_update
176 if saved_change_to_ip_address? && ip_address
177 Node.where('id != ? and ip_address = ?',
178 id, ip_address).each do |stale_node|
179 # One or more(!) stale node records have the same IP address
180 # as the new node. Clear the ip_address field on the stale
181 # nodes. Otherwise, we (via SLURM) might inadvertently connect
182 # to the new node using the old node's hostname.
183 stale_node.update!(ip_address: nil)
186 if hostname_before_last_save && saved_change_to_hostname?
187 self.class.dns_server_update(hostname_before_last_save, UNUSED_NODE_IP)
189 if hostname && (saved_change_to_hostname? || saved_change_to_ip_address?)
190 self.class.dns_server_update(hostname, ip_address || UNUSED_NODE_IP)
194 def self.dns_server_update hostname, ip_address
197 ptr_domain = ip_address.
198 split('.').reverse.join('.').concat('.in-addr.arpa')
202 uuid_prefix: Rails.configuration.ClusterID,
203 ip_address: ip_address,
204 ptr_domain: ptr_domain,
207 if (!Rails.configuration.Containers.SLURM.Managed.DNSServerConfDir.to_s.empty? and
208 !Rails.configuration.Containers.SLURM.Managed.DNSServerConfTemplate.to_s.empty?)
212 template = IO.read(Rails.configuration.Containers.SLURM.Managed.DNSServerConfTemplate)
213 rescue IOError, SystemCallError => e
214 logger.error "Reading #{Rails.configuration.Containers.SLURM.Managed.DNSServerConfTemplate}: #{e.message}"
218 hostfile = File.join Rails.configuration.Containers.SLURM.Managed.DNSServerConfDir, "#{hostname}.conf"
219 Tempfile.open(["#{hostname}-", ".conf.tmp"],
220 Rails.configuration.Containers.SLURM.Managed.DNSServerConfDir) do |f|
222 f.puts template % template_vars
224 File.rename tmpfile, hostfile
225 rescue IOError, SystemCallError => e
226 logger.error "Writing #{hostfile}: #{e.message}"
229 if tmpfile and File.file? tmpfile
230 # Cleanup remaining temporary file.
236 if !Rails.configuration.Containers.SLURM.Managed.DNSServerUpdateCommand.empty?
237 cmd = Rails.configuration.Containers.SLURM.Managed.DNSServerUpdateCommand % template_vars
239 logger.error "dns_server_update_command #{cmd.inspect} failed: #{$?}"
244 if (!Rails.configuration.Containers.SLURM.Managed.DNSServerConfDir.to_s.empty? and
245 !Rails.configuration.Containers.SLURM.Managed.DNSServerReloadCommand.to_s.empty?)
246 restartfile = File.join(Rails.configuration.Containers.SLURM.Managed.DNSServerConfDir, 'restart.txt')
248 File.open(restartfile, 'w') do |f|
249 # Typically, this is used to trigger a dns server restart
250 f.puts Rails.configuration.Containers.SLURM.Managed.DNSServerReloadCommand
252 rescue IOError, SystemCallError => e
253 logger.error "Unable to write #{restartfile}: #{e.message}"
261 def self.hostname_for_slot(slot_number)
262 config = Rails.configuration.Containers.SLURM.Managed.AssignNodeHostname
264 return nil if !config
266 sprintf(config, {:slot_number => slot_number})
269 # At startup, make sure all DNS entries exist. Otherwise, slurmctld
270 # will refuse to start.
271 if (!Rails.configuration.Containers.SLURM.Managed.DNSServerConfDir.to_s.empty? and
272 !Rails.configuration.Containers.SLURM.Managed.DNSServerConfTemplate.to_s.empty? and
273 !Rails.configuration.Containers.SLURM.Managed.AssignNodeHostname.empty?)
275 (0..MAX_VMS-1).each do |slot_number|
276 hostname = hostname_for_slot(slot_number)
277 hostfile = File.join Rails.configuration.Containers.SLURM.Managed.DNSServerConfDir, "#{hostname}.conf"
278 if !File.exist? hostfile
279 n = Node.where(:slot_number => slot_number).first
280 if n.nil? or n.ip_address.nil?
281 dns_server_update(hostname, UNUSED_NODE_IP)
283 dns_server_update(hostname, n.ip_address)
289 def permission_to_update
290 @bypass_arvados_authorization or super
293 def permission_to_create
294 current_user and current_user.is_admin