Merge branch '3605-queue-position-size' refs #3605
[arvados.git] / services / api / app / models / node.rb
1 class Node < ArvadosModel
2   include HasUuid
3   include KindAndEtag
4   include CommonApiTemplate
5   serialize :info, Hash
6   serialize :properties, Hash
7   before_validation :ensure_ping_secret
8   after_update :dnsmasq_update
9
10   MAX_SLOTS = 64
11
12   @@confdir = Rails.configuration.dnsmasq_conf_dir
13   @@domain = Rails.configuration.compute_node_domain rescue `hostname --domain`.strip
14   @@nameservers = Rails.configuration.compute_node_nameservers
15
16   api_accessible :user, :extend => :common do |t|
17     t.add :hostname
18     t.add :domain
19     t.add :ip_address
20     t.add :last_ping_at
21     t.add :slot_number
22     t.add :status
23     t.add :crunch_worker_state
24     t.add :properties
25   end
26   api_accessible :superuser, :extend => :user do |t|
27     t.add :first_ping_at
28     t.add :info
29     t.add lambda { |x| @@nameservers }, :as => :nameservers
30   end
31
32   def domain
33     super || @@domain
34   end
35
36   def crunch_worker_state
37     case self.info.andand['slurm_state']
38     when 'alloc', 'comp'
39       'busy'
40     when 'idle'
41       'idle'
42     else
43       'down'
44     end
45   end
46
47   def status
48     if !self.last_ping_at
49       if Time.now - self.created_at > 5.minutes
50         'startup-fail'
51       else
52         'pending'
53       end
54     elsif Time.now - self.last_ping_at > 1.hours
55       'missing'
56     else
57       'running'
58     end
59   end
60
61   def ping(o)
62     raise "must have :ip and :ping_secret" unless o[:ip] and o[:ping_secret]
63
64     if o[:ping_secret] != self.info['ping_secret']
65       logger.info "Ping: secret mismatch: received \"#{o[:ping_secret]}\" != \"#{self.info['ping_secret']}\""
66       raise ArvadosModel::UnauthorizedError.new("Incorrect ping_secret")
67     end
68     self.last_ping_at = Time.now
69
70     @bypass_arvados_authorization = true
71
72     # Record IP address
73     if self.ip_address.nil?
74       logger.info "#{self.uuid} ip_address= #{o[:ip]}"
75       self.ip_address = o[:ip]
76       self.first_ping_at = Time.now
77     end
78
79     # Record instance ID if not already known
80     if o[:ec2_instance_id]
81       if !self.info['ec2_instance_id']
82         self.info['ec2_instance_id'] = o[:ec2_instance_id]
83         if (Rails.configuration.compute_node_ec2_tag_enable rescue true)
84           tag_cmd = ("ec2-create-tags #{o[:ec2_instance_id]} " +
85                      "--tag 'Name=#{self.uuid}'")
86           `#{tag_cmd}`
87         end
88       elsif self.info['ec2_instance_id'] != o[:ec2_instance_id]
89         logger.debug "Multiple nodes have credentials for #{self.uuid}"
90         raise "#{self.uuid} is already running at #{self.info['ec2_instance_id']} so rejecting ping from #{o[:ec2_instance_id]}"
91       end
92     end
93
94     # Assign hostname
95     if self.slot_number.nil?
96       try_slot = 0
97       begin
98         self.slot_number = try_slot
99         begin
100           self.save!
101           break
102         rescue ActiveRecord::RecordNotUnique
103           try_slot += 1
104         end
105         raise "No available node slots" if try_slot == MAX_SLOTS
106       end while true
107       self.hostname = self.class.hostname_for_slot(self.slot_number)
108       if info['ec2_instance_id']
109         if (Rails.configuration.compute_node_ec2_tag_enable rescue true)
110           `ec2-create-tags #{self.info['ec2_instance_id']} --tag 'hostname=#{self.hostname}'`
111         end
112       end
113     end
114
115     # Record other basic stats
116     ['total_cpu_cores', 'total_ram_mb', 'total_scratch_mb'].each do |key|
117       if value = (o[key] or o[key.to_sym])
118         self.properties[key] = value.to_i
119       else
120         self.properties.delete(key)
121       end
122     end
123
124     save!
125   end
126
127   def start!(ping_url_method)
128     ensure_permission_to_save
129     ping_url = ping_url_method.call({ id: self.uuid, ping_secret: self.info['ping_secret'] })
130     if (Rails.configuration.compute_node_ec2run_args and
131         Rails.configuration.compute_node_ami)
132       ec2_args = ["--user-data '#{ping_url}'",
133                   "-t c1.xlarge -n 1",
134                   Rails.configuration.compute_node_ec2run_args,
135                   Rails.configuration.compute_node_ami
136                  ]
137       ec2run_cmd = ["ec2-run-instances",
138                     "--client-token", self.uuid,
139                     ec2_args].flatten.join(' ')
140       ec2spot_cmd = ["ec2-request-spot-instances",
141                      "-p #{Rails.configuration.compute_node_spot_bid} --type one-time",
142                      ec2_args].flatten.join(' ')
143     else
144       ec2run_cmd = ''
145       ec2spot_cmd = ''
146     end
147     self.info['ec2_run_command'] = ec2run_cmd
148     self.info['ec2_spot_command'] = ec2spot_cmd
149     self.info['ec2_start_command'] = ec2spot_cmd
150     logger.info "#{self.uuid} ec2_start_command= #{ec2spot_cmd.inspect}"
151     result = `#{ec2spot_cmd} 2>&1`
152     self.info['ec2_start_result'] = result
153     logger.info "#{self.uuid} ec2_start_result= #{result.inspect}"
154     result.match(/INSTANCE\s*(i-[0-9a-f]+)/) do |m|
155       instance_id = m[1]
156       self.info['ec2_instance_id'] = instance_id
157       if (Rails.configuration.compute_node_ec2_tag_enable rescue true)
158         `ec2-create-tags #{instance_id} --tag 'Name=#{self.uuid}'`
159       end
160     end
161     result.match(/SPOTINSTANCEREQUEST\s*(sir-[0-9a-f]+)/) do |m|
162       sir_id = m[1]
163       self.info['ec2_sir_id'] = sir_id
164       if (Rails.configuration.compute_node_ec2_tag_enable rescue true)
165         `ec2-create-tags #{sir_id} --tag 'Name=#{self.uuid}'`
166       end
167     end
168     self.save!
169   end
170
171   protected
172
173   def ensure_ping_secret
174     self.info['ping_secret'] ||= rand(2**256).to_s(36)
175   end
176
177   def dnsmasq_update
178     if self.hostname_changed? or self.ip_address_changed?
179       if self.hostname and self.ip_address
180         self.class.dnsmasq_update(self.hostname, self.ip_address)
181       end
182     end
183   end
184
185   def self.dnsmasq_update(hostname, ip_address)
186     return unless @@confdir
187     ptr_domain = ip_address.
188       split('.').reverse.join('.').concat('.in-addr.arpa')
189     hostfile = File.join @@confdir, hostname
190     File.open hostfile, 'w' do |f|
191       f.puts "address=/#{hostname}/#{ip_address}"
192       f.puts "address=/#{hostname}.#{@@domain}/#{ip_address}" if @@domain
193       f.puts "ptr-record=#{ptr_domain},#{hostname}"
194     end
195     File.open(File.join(@@confdir, 'restart.txt'), 'w') do |f|
196       # this should trigger a dnsmasq restart
197     end
198   end
199
200   def self.hostname_for_slot(slot_number)
201     "compute#{slot_number}"
202   end
203
204   # At startup, make sure all DNS entries exist.  Otherwise, slurmctld
205   # will refuse to start.
206   if @@confdir and
207       !File.exists? (File.join(@@confdir, hostname_for_slot(MAX_SLOTS-1)))
208     (0..MAX_SLOTS-1).each do |slot_number|
209       hostname = hostname_for_slot(slot_number)
210       hostfile = File.join @@confdir, hostname
211       if !File.exists? hostfile
212         dnsmasq_update(hostname, '127.40.4.0')
213       end
214     end
215   end
216
217   def permission_to_update
218     @bypass_arvados_authorization or super
219   end
220
221   def permission_to_create
222     current_user and current_user.is_admin
223   end
224 end