+# Copyright (C) The Arvados Authors. All rights reserved.
+#
+# SPDX-License-Identifier: AGPL-3.0
+
+require 'tempfile'
+
class Node < ArvadosModel
include HasUuid
include KindAndEtag
include CommonApiTemplate
- serialize :info, Hash
- serialize :properties, Hash
+
+ # Posgresql JSONB columns should NOT be declared as serialized, Rails 5
+ # already know how to properly treat them.
+ attribute :properties, :jsonbHash, default: {}
+ attribute :info, :jsonbHash, default: {}
+
before_validation :ensure_ping_secret
after_update :dns_server_update
def crunch_worker_state
return 'down' if slot_number.nil?
case self.info.andand['slurm_state']
- when 'alloc', 'comp'
+ when 'alloc', 'comp', 'mix', 'drng'
'busy'
when 'idle'
'idle'
end
end
- # Assign slot_number
- if self.slot_number.nil?
- try_slot = 0
- begin
- self.slot_number = try_slot
- begin
- self.save!
- break
- rescue ActiveRecord::RecordNotUnique
- try_slot += 1
- end
- raise "No available node slots" if try_slot == Rails.configuration.max_compute_nodes
- end while true
- end
-
- # Assign hostname
- if self.hostname.nil? and Rails.configuration.assign_node_hostname
- self.hostname = self.class.hostname_for_slot(self.slot_number)
- end
+ assign_slot
# Record other basic stats
['total_cpu_cores', 'total_ram_mb', 'total_scratch_mb'].each do |key|
save!
end
+ def assign_slot
+ return if self.slot_number.andand > 0
+ while true
+ self.slot_number = self.class.available_slot_number
+ if self.slot_number.nil?
+ raise "No available node slots"
+ end
+ begin
+ save!
+ return assign_hostname
+ rescue ActiveRecord::RecordNotUnique
+ # try again
+ end
+ end
+ end
+
protected
+ def assign_hostname
+ if self.hostname.nil? and Rails.configuration.assign_node_hostname
+ self.hostname = self.class.hostname_for_slot(self.slot_number)
+ end
+ end
+
+ def self.available_slot_number
+ # Join the sequence 1..max with the nodes table. Return the first
+ # (i.e., smallest) value that doesn't match the slot_number of any
+ # existing node.
+ connection.exec_query('SELECT n FROM generate_series(1, $1) AS slot(n)
+ LEFT JOIN nodes ON n=slot_number
+ WHERE slot_number IS NULL
+ LIMIT 1',
+ # query label:
+ 'Node.available_slot_number',
+ # [col_id, val] for $1 vars:
+ [[nil, Rails.configuration.max_compute_nodes]],
+ ).rows.first.andand.first
+ end
+
def ensure_ping_secret
self.info['ping_secret'] ||= rand(2**256).to_s(36)
end
def dns_server_update
- if hostname_changed? && hostname_was
+ if ip_address_changed? && ip_address
+ Node.where('id != ? and ip_address = ?',
+ id, ip_address).each do |stale_node|
+ # One or more(!) stale node records have the same IP address
+ # as the new node. Clear the ip_address field on the stale
+ # nodes. Otherwise, we (via SLURM) might inadvertently connect
+ # to the new node using the old node's hostname.
+ stale_node.update_attributes!(ip_address: nil)
+ end
+ end
+ if hostname_was && hostname_changed?
self.class.dns_server_update(hostname_was, UNUSED_NODE_IP)
end
- if hostname_changed? or ip_address_changed?
- if ip_address
- Node.where('id != ? and ip_address = ? and last_ping_at < ?',
- id, ip_address, 10.minutes.ago).each do |stale_node|
- # One or more stale compute node records have the same IP
- # address as the new node. Clear the ip_address field on
- # the stale nodes.
- stale_node.ip_address = nil
- stale_node.save!
- end
- end
- if hostname
- self.class.dns_server_update(hostname, ip_address || UNUSED_NODE_IP)
- end
+ if hostname && (hostname_changed? || ip_address_changed?)
+ self.class.dns_server_update(hostname, ip_address || UNUSED_NODE_IP)
end
end
}
if Rails.configuration.dns_server_conf_dir and Rails.configuration.dns_server_conf_template
+ tmpfile = nil
begin
begin
template = IO.read(Rails.configuration.dns_server_conf_template)
- rescue => e
+ rescue IOError, SystemCallError => e
logger.error "Reading #{Rails.configuration.dns_server_conf_template}: #{e.message}"
raise
end
hostfile = File.join Rails.configuration.dns_server_conf_dir, "#{hostname}.conf"
- File.open hostfile+'.tmp', 'w' do |f|
+ Tempfile.open(["#{hostname}-", ".conf.tmp"],
+ Rails.configuration.dns_server_conf_dir) do |f|
+ tmpfile = f.path
f.puts template % template_vars
end
- File.rename hostfile+'.tmp', hostfile
- rescue => e
+ File.rename tmpfile, hostfile
+ rescue IOError, SystemCallError => e
logger.error "Writing #{hostfile}: #{e.message}"
ok = false
+ ensure
+ if tmpfile and File.file? tmpfile
+ # Cleanup remaining temporary file.
+ File.unlink tmpfile
+ end
end
end
# Typically, this is used to trigger a dns server restart
f.puts Rails.configuration.dns_server_reload_command
end
- rescue => e
+ rescue IOError, SystemCallError => e
logger.error "Unable to write #{restartfile}: #{e.message}"
ok = false
end
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