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',
27 attr_accessor :job_readable
29 UNUSED_NODE_IP = '127.40.4.0'
32 api_accessible :user, :extend => :common do |t|
39 t.add :api_job_uuid, as: :job_uuid
40 t.add :crunch_worker_state
43 api_accessible :superuser, :extend => :user do |t|
46 t.add lambda { |x| Rails.configuration.Containers.SLURM.Managed.ComputeNodeNameservers.keys }, :as => :nameservers
50 @bypass_arvados_authorization = false
54 super || Rails.configuration.Containers.SLURM.Managed.ComputeNodeDomain
58 job_readable ? job_uuid : nil
61 def crunch_worker_state
62 return 'down' if slot_number.nil?
63 case self.info.andand['slurm_state']
64 when 'alloc', 'comp', 'mix', 'drng'
75 if db_current_time - self.created_at > 5.minutes
80 elsif db_current_time - self.last_ping_at > 1.hours
88 raise "must have :ip and :ping_secret" unless o[:ip] and o[:ping_secret]
90 if o[:ping_secret] != self.info['ping_secret']
91 logger.info "Ping: secret mismatch: received \"#{o[:ping_secret]}\" != \"#{self.info['ping_secret']}\""
92 raise ArvadosModel::UnauthorizedError.new("Incorrect ping_secret")
95 current_time = db_current_time
96 self.last_ping_at = current_time
98 @bypass_arvados_authorization = true
101 if self.ip_address.nil?
102 logger.info "#{self.uuid} ip_address= #{o[:ip]}"
103 self.ip_address = o[:ip]
104 self.first_ping_at = current_time
107 # Record instance ID if not already known
108 if o[:ec2_instance_id]
109 if !self.info['ec2_instance_id']
110 self.info['ec2_instance_id'] = o[:ec2_instance_id]
111 elsif self.info['ec2_instance_id'] != o[:ec2_instance_id]
112 logger.debug "Multiple nodes have credentials for #{self.uuid}"
113 raise "#{self.uuid} is already running at #{self.info['ec2_instance_id']} so rejecting ping from #{o[:ec2_instance_id]}"
119 # Record other basic stats
120 ['total_cpu_cores', 'total_ram_mb', 'total_scratch_mb'].each do |key|
121 if value = (o[key] or o[key.to_sym])
122 self.properties[key] = value.to_i
124 self.properties.delete(key)
132 return if self.slot_number.andand > 0
134 self.slot_number = self.class.available_slot_number
135 if self.slot_number.nil?
136 raise "No available node slots"
140 return assign_hostname
141 rescue ActiveRecord::RecordNotUnique
150 if self.hostname.nil? and Rails.configuration.Containers.SLURM.Managed.AssignNodeHostname
151 self.hostname = self.class.hostname_for_slot(self.slot_number)
155 def self.available_slot_number
156 # Join the sequence 1..max with the nodes table. Return the first
157 # (i.e., smallest) value that doesn't match the slot_number of any
159 connection.exec_query('SELECT n FROM generate_series(1, $1) AS slot(n)
160 LEFT JOIN nodes ON n=slot_number
161 WHERE slot_number IS NULL
164 'Node.available_slot_number',
167 ).rows.first.andand.first
170 def ensure_ping_secret
171 self.info['ping_secret'] ||= rand(2**256).to_s(36)
174 def dns_server_update
175 if saved_change_to_ip_address? && ip_address
176 Node.where('id != ? and ip_address = ?',
177 id, ip_address).each do |stale_node|
178 # One or more(!) stale node records have the same IP address
179 # as the new node. Clear the ip_address field on the stale
180 # nodes. Otherwise, we (via SLURM) might inadvertently connect
181 # to the new node using the old node's hostname.
182 stale_node.update!(ip_address: nil)
185 if hostname_before_last_save && saved_change_to_hostname?
186 self.class.dns_server_update(hostname_before_last_save, UNUSED_NODE_IP)
188 if hostname && (saved_change_to_hostname? || saved_change_to_ip_address?)
189 self.class.dns_server_update(hostname, ip_address || UNUSED_NODE_IP)
193 def self.dns_server_update hostname, ip_address
196 ptr_domain = ip_address.
197 split('.').reverse.join('.').concat('.in-addr.arpa')
201 uuid_prefix: Rails.configuration.ClusterID,
202 ip_address: ip_address,
203 ptr_domain: ptr_domain,
206 if (!Rails.configuration.Containers.SLURM.Managed.DNSServerConfDir.to_s.empty? and
207 !Rails.configuration.Containers.SLURM.Managed.DNSServerConfTemplate.to_s.empty?)
211 template = IO.read(Rails.configuration.Containers.SLURM.Managed.DNSServerConfTemplate)
212 rescue IOError, SystemCallError => e
213 logger.error "Reading #{Rails.configuration.Containers.SLURM.Managed.DNSServerConfTemplate}: #{e.message}"
217 hostfile = File.join Rails.configuration.Containers.SLURM.Managed.DNSServerConfDir, "#{hostname}.conf"
218 Tempfile.open(["#{hostname}-", ".conf.tmp"],
219 Rails.configuration.Containers.SLURM.Managed.DNSServerConfDir) do |f|
221 f.puts template % template_vars
223 File.rename tmpfile, hostfile
224 rescue IOError, SystemCallError => e
225 logger.error "Writing #{hostfile}: #{e.message}"
228 if tmpfile and File.file? tmpfile
229 # Cleanup remaining temporary file.
235 if !Rails.configuration.Containers.SLURM.Managed.DNSServerUpdateCommand.empty?
236 cmd = Rails.configuration.Containers.SLURM.Managed.DNSServerUpdateCommand % template_vars
238 logger.error "dns_server_update_command #{cmd.inspect} failed: #{$?}"
243 if (!Rails.configuration.Containers.SLURM.Managed.DNSServerConfDir.to_s.empty? and
244 !Rails.configuration.Containers.SLURM.Managed.DNSServerReloadCommand.to_s.empty?)
245 restartfile = File.join(Rails.configuration.Containers.SLURM.Managed.DNSServerConfDir, 'restart.txt')
247 File.open(restartfile, 'w') do |f|
248 # Typically, this is used to trigger a dns server restart
249 f.puts Rails.configuration.Containers.SLURM.Managed.DNSServerReloadCommand
251 rescue IOError, SystemCallError => e
252 logger.error "Unable to write #{restartfile}: #{e.message}"
260 def self.hostname_for_slot(slot_number)
261 config = Rails.configuration.Containers.SLURM.Managed.AssignNodeHostname
263 return nil if !config
265 sprintf(config, {:slot_number => slot_number})
268 # At startup, make sure all DNS entries exist. Otherwise, slurmctld
269 # will refuse to start.
270 if (!Rails.configuration.Containers.SLURM.Managed.DNSServerConfDir.to_s.empty? and
271 !Rails.configuration.Containers.SLURM.Managed.DNSServerConfTemplate.to_s.empty? and
272 !Rails.configuration.Containers.SLURM.Managed.AssignNodeHostname.empty?)
274 (0..MAX_VMS-1).each do |slot_number|
275 hostname = hostname_for_slot(slot_number)
276 hostfile = File.join Rails.configuration.Containers.SLURM.Managed.DNSServerConfDir, "#{hostname}.conf"
277 if !File.exist? hostfile
278 n = Node.where(:slot_number => slot_number).first
279 if n.nil? or n.ip_address.nil?
280 dns_server_update(hostname, UNUSED_NODE_IP)
282 dns_server_update(hostname, n.ip_address)
288 def permission_to_update
289 @bypass_arvados_authorization or super
292 def permission_to_create
293 current_user and current_user.is_admin