Module: GaptoolBaseHelpers

Defined in:
lib/helpers/gaptool-base.rb

Instance Method Summary collapse

Instance Method Details

#balanceservices(role, environment) ⇒ Object 



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# File 'lib/helpers/gaptool-base.rb', line 65

def balanceservices(role, environment)
  @runable = Array.new
  @available = Array.new
  @totalcap = 0
  @volume = 0
  $redis.keys("host:#{role}:#{environment}:*").each do |host|
    @available << {
      :hostname => $redis.hget(host, 'hostname'),
      :instance => $redis.hget(host, 'instance'),
      :capacity => $redis.hget(host, 'capacity').to_i,
    }
    @totalcap = @totalcap + $redis.hget(host, 'capacity').to_i
  end
  $redis.keys("service:#{role}:#{environment}:*").each do |service|
    unless service =~ /:count/
      if $redis.hget(service, 'run').to_i == 1
        @runable << {
          :name => $redis.hget(service, 'name'),
          :keys => eval($redis.hget(service, 'keys')),
          :weight => $redis.hget(service, 'weight').to_i
        }
      end
    end
  end
  @volume = 0
  @runable.each do |service|
    @volume += service[:weight]
  end
  if @totalcap < @volume
    return { :error => true, :message => "This would overcommit, remove some resources or add nodes", :totalcap => @totalcap, :volume => @volume }
  else
    @runable.sort! { |x, y| x[:weight] <=> y[:weight] }
    @available.sort! { |x, y| x[:capacity] <=> y[:capacity] }
    @runlist = Array.new
    @svctab = Hash.new
    @runable.each do |event|
      @svctab[event[:name]] = Array.new
    end
    @exitrunable = 0
    while @runable != []
      break if @exitrunable == 1
      @available.each do |host|
        break if @runable.last.nil?
        @exitrunable = 1 if @svctab[@runable.last[:name]].include? host[:hostname]
        break if @svctab[@runable.last[:name]].include? host[:hostname]
        if host[:capacity] >= @runable.last[:weight]
          host[:capacity] = host[:capacity] - @runable.last[:weight]
          @svctab[@runable.last[:name]] << host[:hostname]
          @runlist << { :host => host, :service => @runable.pop }
        end
      end
    end
    return @runlist
  end
end

#getservices ⇒ Object 



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# File 'lib/helpers/gaptool-base.rb', line 155

def getservices()
  services = Array.new
  $redis.keys('service:*').each do |service|
    unless service =~ /:count/
      line = $redis.hgetall(service)
      line['keys'] = eval(line['keys'])
      services << line
    end
  end
  return services
end

#gt_securitygroup(role, environment, zone) ⇒ Object 



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# File 'lib/helpers/gaptool-base.rb', line 34

def gt_securitygroup(role, environment, zone)
  AWS.config(:access_key_id => $redis.hget('config', 'aws_id'), :secret_access_key => $redis.hget('config', 'aws_secret'), :ec2_endpoint => "ec2.#{zone.chop}.amazonaws.com")
  @ec2 = AWS::EC2.new
  groupname = "#{role}-#{environment}"
  default_list = [ 22 ]
  @ec2.security_groups.each do |group|
    if group.name == "#{role}-#{environment}"
      return group.id
    end
  end
  internet = ['0.0.0.0/0']
  sg = @ec2.security_groups.create("#{role}-#{environment}")
  sg.authorize_ingress :tcp, 22, *internet
  return sg.id
end

#hash2redis(key, hash) ⇒ Object 



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# File 'lib/helpers/gaptool-base.rb', line 3

def hash2redis( key, hash )
  hash.keys.each do |hkey|
    $redis.hset key, hkey, hash[hkey]
  end
end

#hostsgen(zone) ⇒ Object 



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# File 'lib/helpers/gaptool-base.rb', line 130

def hostsgen(zone)
  AWS.config(:access_key_id => $redis.hget('config', 'aws_id'), :secret_access_key => $redis.hget('config', 'aws_secret'), :ec2_endpoint => "ec2.#{zone}.amazonaws.com")
  @ec2 = AWS::EC2.new
  hosts = Hash.new
  $redis.keys("host:*").each do |host|
    $redis.hset(host, 'hostname', @ec2.instances[$redis.hget(host, 'instance')].dns_name)
    hosts.merge!(host.gsub(/host:/, '').gsub(/:/,'-') => Resolv.getaddress($redis.hget(host, 'hostname')))
    if $redis.hget(host, 'alias')
      hosts.merge!($redis.hget(host, 'alias') => Resolv.getaddress($redis.hget(host, 'hostname')))
    end
  end

  hostsfile = "# DO NOT EDIT, GENERATED BY GAPTOOL\n127.0.0.1 localhost\n::1 localhost\n"
  hosts.keys.each do |key|
    hostsfile += "#{hosts[key]} #{key} # PLACED BY GT\n"
  end
#    $redis.keys("host:*").peach do |host|
#      ENV['SSH_AUTH_SOCK'] = ''
#      Net::SSH.start($redis.hget(host, 'hostname'), 'admin', :key_data => [$redis.hget('config', 'gaptoolkey')], :config => false, :keys_only => true, :paranoid => false) do |ssh|
#        ssh.exec! "echo \"127.0.0.1 #{currenthost}\n\" \"#{hostsfile}\" > /etc/hosts.generated"
#      end
#    end
  return hosts
end

#putkey(host) ⇒ Object 



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# File 'lib/helpers/gaptool-base.rb', line 21

def putkey( host )
  @key = OpenSSL::PKey::RSA.new 2048
  @pubkey = "#{@key.ssh_type} #{[@key.to_blob].pack('m0')} GAPTOOL_GENERATED_KEY"
  ENV['SSH_AUTH_SOCK'] = ''
  Net::SSH.start(host, 'admin', :key_data => [$redis.hget('config', 'gaptoolkey')], :config => false, :keys_only => true, :paranoid => false) do |ssh|
    ssh.exec! "grep -v GAPTOOL_GENERATED_KEY ~/.ssh/authorized_keys > /tmp/pubkeys"
    ssh.exec! "cat /tmp/pubkeys > ~/.ssh/authorized_keys"
    ssh.exec! "rm /tmp/pubkeys"
    ssh.exec! "echo #{@pubkey} >> ~/.ssh/authorized_keys"
  end
  return @key.to_pem
end

#redishash(query) ⇒ Object 



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# File 'lib/helpers/gaptool-base.rb', line 9

def redishash(query)
  result = Hash.new
  query.keys.each do |key|
    entry = Hash.new
    query[key].each do |hkey|
      entry.merge!(hkey => $redis.hget(key, hkey))
    end
    result.merge!({ key => entry })
  end
  return result
end

#runservice(host, role, environment, service, keys, state) ⇒ Object 



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# File 'lib/helpers/gaptool-base.rb', line 50

def runservice(host, role, environment, service, keys, state)
  ENV['SSH_AUTH_SOCK'] = ''
  Net::SSH.start(host, 'admin', :key_data => [$redis.hget('config', 'gaptoolkey')], :config => false, :keys_only => true, :paranoid => false) do |ssh|
    if state == 'start'
      ssh.exec! "echo '#{keys.to_yaml}' > /tmp/apikeys-#{service}.yml"
      ssh.exec! "sudo restart #{service} || sudo start #{service} || exit 0"
      $redis.lpush("running", "{:hostname => '#{host}', :role => '#{role}', :environment => '#{environment}', :service => '#{service}'}")
    elsif state == 'stop'
      ssh.exec! "rm /tmp/apikeys-#{service}.yml"
      ssh.exec! "sudo stop #{service} || exit 0"
      $redis.lrem("running", -1, "{:hostname => '#{host}', :role => '#{role}', :environment => '#{environment}', service => '#{service}'}")
    end
  end
end

#servicestopall(role, environment) ⇒ Object 



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# File 'lib/helpers/gaptool-base.rb', line 121

def servicestopall(role, environment)
  $redis.lrange('running', 0, -1).peach do |service|
    line = eval(service)
    if line[:role] == role && line[:environment] == environment
      runservice(line[:hostname], role, environment, line[:service], nil, 'stop')
    end
  end
end