Class: VM

Inherits:
Object
  • Object
show all
Defined in:
lib/floatyhelper/vm.rb

Class Method Summary collapse

Class Method Details

.alive(host, query = nil) ⇒ Object 



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# File 'lib/floatyhelper/vm.rb', line 69

def self.alive(host, query = nil)
  query ||= query(host)
  query['ok'] && query[host]['state'] == 'running'
end

.destroy(id) ⇒ Object

VM Management ###



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# File 'lib/floatyhelper/vm.rb', line 51

def self.destroy(id)
  hosts = Hosts.get_hosts_from_id(id)
  Groups.delete_tag(id) if Groups.tag?(id)
  Groups.delete_all if id == 'all'
  hosts = hosts.select { |host| alive(host) }
  hosts.each_slice(10) { |s| puts Floaty.floaty_cmd("delete #{s.join(',')} --service vmpooler") } unless hosts.empty?
end

.find_pooled_platforms ⇒ Object 



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# File 'lib/floatyhelper/vm.rb', line 31

def self.find_pooled_platforms
  vmpooler_url = Floaty.vmpooler_url
  begin # rubocop:disable Style/RedundantBegin
    uri = URI.parse("#{vmpooler_url}/status")
    http = Net::HTTP.new(uri.host, uri.port)
    http.use_ssl = true
    result = http.get(uri.request_uri)
    result = JSON.parse(result.body)
    # Techinally, 'max > 0' tells you if it's a pooled platform, but if
    # the pool is empty, we'll want to fall back to ABS anyway.
    result['pools'].select { |_pool, info| info['ready'].positive? }.map { |pool, info| [pool.gsub('-pixa4','').gsub('-pooled',''), info['ready']] }.to_h
  rescue StandardError
    # Not a great practice to swallow all errors, but this list is probably
    # pretty stable, so let's just pass along the default.
    puts "Error looking up pooled platforms from #{vmpooler_url}/status. Using default pooled platform list instead.".yellow
    pooled_platforms_default
  end
end

.get_current_lifetime(host) ⇒ Object 



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# File 'lib/floatyhelper/vm.rb', line 64

def self.get_current_lifetime(host)
  status = query(host)
  status['ok'] ? status[host]['lifetime'] : nil
end

.get_vm(platform: 'centos-7-x86_64', force_abs: false, number: 1) ⇒ Object

Get a VM from floaty ###



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# File 'lib/floatyhelper/vm.rb', line 206

def self.get_vm(platform: 'centos-7-x86_64', force_abs: false, number: 1)
  pools = find_pooled_platforms
  platform = platform.gsub('-pixa4','')
  vms_per_thread = 10
  if !pools.keys.include?(platform) || force_abs || pools[platform] < number
    numthreads = number / vms_per_thread
    numthreads += 1 if number % vms_per_thread != 0
    threads = []
    responses = []
    mutex = Mutex.new
    numleft = number
    numthreads.times do
      num = numleft < vms_per_thread ? numleft : vms_per_thread
      numleft -= num
      threads << Thread.new do
        Thread.current['print'] = false
        myresponse = Floaty.floaty_cmd("get #{platform}=#{num} --service abs --priority 1 --force", use_pty: true)
        mutex.synchronize { responses << myresponse }
      end
    end
    # Setting print to true then joining causes the thread not
    # to pick up the variable change sometimes. So this polls
    # the thread status and sets the print variable in a loop.
    puts "Fetching VMs using #{threads.count} thread#{threads.count > 1 ? 's' : ''}. Output shown will be from one of the currently alive threads, as well as the result of any completed threads, until all threads are finished.".cyan unless threads.count == 1
    while threads.any? { |t| t.alive? } do
      # If we have no living threads with print set to true,
      # pick one and turn it on.
      if threads.select { |t| t.alive? && t['print'] == true }.empty?
        t = threads.find{ |t| t.alive? }
        t['print'] = true if !t.nil?
      end
    end
    # Just in case
    threads.each { |t| t.join }
    vms = []
    responses.each { |r| vms += parse_response(r) }
    # When use_pty is true, we've already printed stderr/stdout, so no need to do so again.
    raise "Error obtaining a VM" if vms.empty?
    vms
  else
    response = Floaty.floaty_cmd("get #{platform}=#{number} --service vmpooler")
    raise "Error obtaining a VM: #{response}" if response.include?('error')
    parse_response(response)
  end
end

.getsnapshot(id, snaptag) ⇒ Object 



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# File 'lib/floatyhelper/vm.rb', line 140

def self.getsnapshot(id, snaptag)
  data = Config.load_data
  data['snapshots'][id][snaptag]
end

.increaselife(id, amount = nil) ⇒ Object 



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# File 'lib/floatyhelper/vm.rb', line 74

def self.increaselife(id, amount = nil)
  amount ||= Config.get_config_setting('increaselife').to_i
  return if amount < 1
  hosts = Hosts.get_hosts_from_id(id)
  hosts.each do |host|
    if (lifetime = get_current_lifetime(host))
      lifetime += amount
      output = Floaty.floaty_cmd("modify #{host} --lifetime #{lifetime} --service vmpooler")
      if output =~ /Successfully modified/
        puts "#{host} lifetime set to #{lifetime} hours".green
      else
        puts "Error setting VM lifetime: #{output}".red
      end
    else
      puts "Could not query host #{host}".red
    end
  end
end

.parse_response(response) ⇒ Object

Response should be something like:

  • vm1.delivery.puppetlabs.net (platform-tag)n

  • vm2.delivery.puppetlabs.net (platform-tag)n



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# File 'lib/floatyhelper/vm.rb', line 201

def self.parse_response(response)
  response.scan(/- ([\w-]+)(?:.vmpooler-prod.puppet.net|.delivery.puppetlabs.net) \(/).flatten
end

.pooled_platforms_default ⇒ Object

Assume we only have 1 of each if we can’t find the info



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# File 'lib/floatyhelper/vm.rb', line 14

def self.pooled_platforms_default
  [
    'centos-7-x86_64',
    'centos-8-x86_64',
    'oracle-7-x86_64',
    'redhat-7-x86_64',
    'redhat-8-x86_64',
    'redhat-fips-7-x86_64',
    'redhat-fips-8-x86_64',
    'scientific-7-x86_64',
    'sles-12-x86_64',
    'sles-15-x86_64',
    'ubuntu-1804-x86_64',
    'ubuntu-2004-x86_64',
  ].map { |x| [x,1] }.to_h
end

.query(host) ⇒ Object 



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# File 'lib/floatyhelper/vm.rb', line 59

def self.query(host)
  output = Floaty.floaty_cmd("query #{host} --service vmpooler")
  Floaty.parse_floaty_json_output(output)
end

.revert(id, snaptag) ⇒ Object 



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# File 'lib/floatyhelper/vm.rb', line 156

def self.revert(id, snaptag)
  clr = Config.get_config_setting('vertical_snapshot_status')
  clr = clr.to_s.downcase == 'true'
  snaptag ||= 'Blank Snaptag'
  shas = VM.getsnapshot(id, snaptag)
  lastlog = {}
  puts `tput clear` if clr
  shas.each do |host, sha|
    # Force a session to show up in lastlog
    lastlog[host] = `ssh -t root@#{host} lastlog -u root 2>/dev/null`.gsub("\r",'').gsub("\n",'')
    print "#{host}: #{sha} --- "
    puts Floaty.floaty_cmd("revert #{host} #{sha} --service vmpooler")
  end
  puts
  puts 'Waiting for all VMs to finish reverting...'
  alldone = false
  until alldone
    puts `tput cup #{shas.count + 2}` if clr
    alldone = true
    print "\r" unless clr
    lastlog.each do |host, value|
      begin
        result =`ssh root@#{host} lastlog -u root 2>/dev/null`.gsub("\r",'').gsub("\n",'')
        # Original will have some garbage about pseudo-terminal that we won't have here
        # Also, can't do this on Windows yet, so pretend we're done for those hosts.
        done = !lastlog[host].include?(result) || result.empty?
      rescue
        done = false
      end
      status = done ? 'Done'.green : 'Wait'.yellow
      if clr
        puts "* %s #{status} *" % "#{host}:".ljust(16)
      else
        print "* %s #{status} *" % "#{host}:".ljust(16)
      end
      alldone &= done
    end
    sleep(1)
  end
  puts ''
end

.snaplist(tag) ⇒ Object 



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# File 'lib/floatyhelper/vm.rb', line 150

def self.snaplist(tag)
  data = Config.load_data
  return [] if !data['snapshots'].keys.include?(tag)
  data['snapshots'][tag].keys
end

.snapshot(id, snaptag) ⇒ Object

Snapshots ###



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# File 'lib/floatyhelper/vm.rb', line 94

def self.snapshot(id, snaptag)
  clr = Config.get_config_setting('vertical_snapshot_status')
  clr = clr.to_s.downcase == 'true'
  snaptag ||= 'Blank Snaptag'
  hosts = Hosts.get_hosts_from_id(id)
  shas = {}
  # There's probably a better way to do this...
  puts `tput clear` if clr

  hosts.each do |host|
    result = Floaty.floaty_cmd("snapshot #{host} --service vmpooler")
    answer = Floaty.parse_floaty_json_output(result)
    sha = answer[host]['snapshot']
    puts "#{host}: #{sha}"
    shas[host] = sha
  end

  data = Config.load_data
  data['snapshots'] ||= {}
  data['snapshots'][id] ||= {}
  data['snapshots'][id][snaptag] = shas
  Config.write_data(data)

  puts
  puts 'Waiting for snapshots to appear in floaty query...'
  alldone = false
  until alldone
    puts `tput cup #{hosts.count + 2}` if clr
    alldone = true
    print "\r" unless clr
    hosts.each do |host|
      answer = query(host)[host]
      done = answer.keys.include?('snapshots') && answer['snapshots'].include?(shas[host])
      status = done ? 'Done'.green : 'Wait'.yellow
      if clr
        puts "* %s #{status} *" % "#{host}:".ljust(16)
      else
        print "* %s #{status} *" % "#{host}:".ljust(16)
      end
      alldone &= done
    end
    sleep(1)
  end
  puts ''
end

.snaptag_exists?(id, snaptag) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/floatyhelper/vm.rb', line 145

def self.snaptag_exists?(id, snaptag)
  data = Config.load_data
  data['snapshots'].keys.include?(id) ? data['snapshots'][id].keys.include?(snaptag) : false
end