1 class Node < ArvadosModel
4 include CommonApiTemplate
6 before_validation :ensure_ping_secret
7 after_update :dnsmasq_update
11 @@confdir = if Rails.configuration.respond_to? :dnsmasq_conf_dir
12 Rails.configuration.dnsmasq_conf_dir
13 elsif File.exists? '/etc/dnsmasq.d/.'
18 @@domain = Rails.configuration.compute_node_domain rescue `hostname --domain`.strip
19 @@nameservers = Rails.configuration.compute_node_nameservers
21 api_accessible :superuser, :extend => :common do |t|
29 t.add lambda { |x| @@nameservers }, :as => :nameservers
43 if Time.now - self.created_at > 5.minutes
48 elsif Time.now - self.last_ping_at > 1.hours
56 raise "must have :ip and :ping_secret" unless o[:ip] and o[:ping_secret]
58 if o[:ping_secret] != self.info[:ping_secret]
59 logger.info "Ping: secret mismatch: received \"#{o[:ping_secret]}\" != \"#{self.info[:ping_secret]}\""
62 self.last_ping_at = Time.now
64 @bypass_arvados_authorization = true
67 if self.ip_address.nil?
68 logger.info "#{self.uuid} ip_address= #{o[:ip]}"
69 self.ip_address = o[:ip]
70 self.first_ping_at = Time.now
73 # Record instance ID if not already known
74 if o[:ec2_instance_id]
75 if !self.info[:ec2_instance_id]
76 self.info[:ec2_instance_id] = o[:ec2_instance_id]
77 `ec2-create-tags #{o[:ec2_instance_id]} --tag 'Name=#{self.uuid}'`
78 elsif self.info[:ec2_instance_id] != o[:ec2_instance_id]
79 logger.debug "Multiple nodes have credentials for #{self.uuid}"
80 raise "#{self.uuid} is already running at #{self.info[:ec2_instance_id]} so rejecting ping from #{o[:ec2_instance_id]}"
85 if self.slot_number.nil?
88 self.slot_number = try_slot
92 rescue ActiveRecord::RecordNotUnique
95 raise "No available node slots" if try_slot == MAX_SLOTS
97 self.hostname = self.class.hostname_for_slot(self.slot_number)
98 if info[:ec2_instance_id]
99 `ec2-create-tags #{self.info[:ec2_instance_id]} --tag 'hostname=#{self.hostname}'`
106 def start!(ping_url_method)
107 ensure_permission_to_update
108 ping_url = ping_url_method.call({ uuid: self.uuid, ping_secret: self.info[:ping_secret] })
109 ec2_args = ["--user-data '#{ping_url}'",
111 "-g", Rails.configuration.compute_node_security_group,
112 Rails.configuration.compute_node_ami
114 ec2run_cmd = ["ec2-run-instances",
115 "--client-token", self.uuid,
116 ec2_args].flatten.join(' ')
117 ec2spot_cmd = ["ec2-request-spot-instances",
118 "-p #{Rails.configuration.compute_node_spot_bid} --type one-time",
119 ec2_args].flatten.join(' ')
120 self.info[:ec2_run_command] = ec2run_cmd
121 self.info[:ec2_spot_command] = ec2spot_cmd
122 self.info[:ec2_start_command] = ec2spot_cmd
123 logger.info "#{self.uuid} ec2_start_command= #{ec2spot_cmd.inspect}"
124 result = `#{ec2spot_cmd} 2>&1`
125 self.info[:ec2_start_result] = result
126 logger.info "#{self.uuid} ec2_start_result= #{result.inspect}"
127 result.match(/INSTANCE\s*(i-[0-9a-f]+)/) do |m|
129 self.info[:ec2_instance_id] = instance_id
130 `ec2-create-tags #{instance_id} --tag 'Name=#{self.uuid}'`
132 result.match(/SPOTINSTANCEREQUEST\s*(sir-[0-9a-f]+)/) do |m|
134 self.info[:ec2_sir_id] = sir_id
135 `ec2-create-tags #{sir_id} --tag 'Name=#{self.uuid}'`
142 def ensure_ping_secret
143 self.info[:ping_secret] ||= rand(2**256).to_s(36)
147 if self.hostname_changed? or self.ip_address_changed?
148 if self.hostname and self.ip_address
149 self.class.dnsmasq_update(self.hostname, self.ip_address)
154 def self.dnsmasq_update(hostname, ip_address)
155 return unless @@confdir
156 ptr_domain = ip_address.
157 split('.').reverse.join('.').concat('.in-addr.arpa')
158 hostfile = File.join @@confdir, hostname
159 File.open hostfile, 'w' do |f|
160 f.puts "address=/#{hostname}/#{ip_address}"
161 f.puts "address=/#{hostname}.#{@@domain}/#{ip_address}" if @@domain
162 f.puts "ptr-record=#{ptr_domain},#{hostname}"
164 File.open(File.join(@@confdir, 'restart.txt'), 'w') do |f|
165 # this should trigger a dnsmasq restart
169 def self.hostname_for_slot(slot_number)
170 "compute#{slot_number}"
173 # At startup, make sure all DNS entries exist. Otherwise, slurmctld
174 # will refuse to start.
176 !File.exists? (File.join(@@confdir, hostname_for_slot(MAX_SLOTS-1)))
177 (0..MAX_SLOTS-1).each do |slot_number|
178 hostname = hostname_for_slot(slot_number)
179 hostfile = File.join @@confdir, hostname
180 if !File.exists? hostfile
181 dnsmasq_update(hostname, '127.40.4.0')
186 def permission_to_update
187 @bypass_arvados_authorization or super
190 def permission_to_create
191 current_user and current_user.is_admin