include AssignUuid
serialize :info, Hash
before_validation :ensure_ping_secret
+ after_update :dnsmasq_update
MAX_SLOTS = 64
+ @@confdir = if Rails.configuration.respond_to? :dnsmasq_conf_dir
+ Rails.configuration.dnsmasq_conf_dir
+ elsif File.exists? '/etc/dnsmasq.d/.'
+ '/etc/dnsmasq.d'
+ else
+ nil
+ end
+ @@domain = Rails.configuration.compute_node_domain rescue `hostname --domain`.strip
+
+ acts_as_api
+ api_accessible :superuser do |t|
+ t.add :uuid
+ t.add :created_by_client
+ t.add :created_by_user
+ t.add :created_at
+ t.add :modified_by_client
+ t.add :modified_by_user
+ t.add :modified_at
+ t.add :hostname
+ t.add :domain
+ t.add :ip_address
+ t.add :first_ping_at
+ t.add :last_ping_at
+ t.add :info
+ t.add :updated_at
+ end
+
def info
@info ||= Hash.new
super
end
+ def domain
+ super || @@domain
+ end
+
+ def status
+ if !self.last_ping_at
+ if Time.now - self.created_at > 5.minutes
+ 'startup-fail'
+ else
+ 'pending'
+ end
+ elsif Time.now - self.last_ping_at > 1.hours
+ 'missing'
+ else
+ 'running'
+ end
+ end
+
def ping(o)
raise "must have :ip and :ping_secret" unless o[:ip] and o[:ping_secret]
try_slot = 0
begin
self.slot_number = try_slot
- try_slot += 1
- break if self.save rescue nil
+ begin
+ self.save!
+ break
+ rescue ActiveRecord::RecordNotUnique
+ try_slot += 1
+ end
raise "No available node slots" if try_slot == MAX_SLOTS
end while true
- self.hostname = "compute#{self.slot_number}"
+ self.hostname = self.class.hostname_for_slot(self.slot_number)
end
save
def ensure_ping_secret
self.info[:ping_secret] ||= rand(2**256).to_s(36)
end
+
+ def dnsmasq_update
+ if self.hostname_changed? or self.ip_address_changed?
+ if self.hostname and self.ip_address
+ self.class.dnsmasq_update(self.hostname, self.ip_address)
+ end
+ end
+ end
+
+ def self.dnsmasq_update(hostname, ip_address)
+ return unless @@confdir
+ ptr_domain = ip_address.
+ split('.').reverse.join('.').concat('.in-addr.arpa')
+ hostfile = File.join @@confdir, hostname
+ File.open hostfile, 'w' do |f|
+ f.puts "address=/#{hostname}/#{ip_address}"
+ f.puts "address=/#{hostname}.#{@@domain}/#{ip_address}" if @@domain
+ f.puts "ptr-record=#{ptr_domain},#{hostname}"
+ end
+ File.open(File.join(@@confdir, 'restart.txt'), 'w') do |f|
+ # this should trigger a dnsmasq restart
+ end
+ end
+
+ def self.hostname_for_slot(slot_number)
+ "compute#{slot_number}"
+ end
+
+ # At startup, make sure all DNS entries exist. Otherwise, slurmctld
+ # will refuse to start.
+ if @@confdir and
+ !File.exists? (File.join(@@confdir, hostname_for_slot(MAX_SLOTS-1)))
+ (0..MAX_SLOTS-1).each do |slot_number|
+ hostname = hostname_for_slot(slot_number)
+ hostfile = File.join @@confdir, hostname
+ if !File.exists? hostfile
+ dnsmasq_update(hostname, '127.40.4.0')
+ end
+ end
+ end
end