Module: BigBang::ExplodeCmd

Included in:
Universe
Defined in:
lib/bigbang/explode.rb

Instance Method Summary collapse

Instance Method Details

#allocate_addresses ⇒ Object 



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# File 'lib/bigbang/explode.rb', line 17

def allocate_addresses
	runs = @runs.find_all { |r| r.elastic_ip == true }
	if runs.empty?
		puts "no need to allocate elastic ips"
		return []
	end
	free_ips = provider.free_eips
	ninstances = runs.inject(0) { |m,r| m += r.instances_count }
	toalloc = ninstances 
	blacklist = free_ips
	if free_ips.size > 0
		n = nil
		if free_ips.size >= ninstances
			n = ninstances
		else
			n = free_ips.size
		end
		confirm("Use #{n} of your #{free_ips.size} free eips?") do
			blacklist = []
			toalloc -= n
		end
	end
	puts "need to alloc: #{toalloc}"
	1.upto(toalloc) do |i|
		puts "allocating eip address #{i}"
		provider.ec2.allocate_address
	end

	addrs = wait_for_eips(free_ips.size + toalloc)
	avail_ips = addrs.collect { |a| a.publicIp }.to_set
	black_ips = blacklist.collect { |a| a.publicIp }.to_set
	(avail_ips - black_ips).to_a[0,ninstances]
end

#assign_addresses(addrs) ⇒ Object 



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# File 'lib/bigbang/explode.rb', line 104

def assign_addresses(addrs) 
	@runs.each do |r|
		r.ec2_instances.each do |instance|
			addr = addrs.pop
			puts "associating address #{addr} " + 
				"to instance #{instance.instanceId}"
			provider.ec2.associate_address(
				:instance_id => instance.instanceId,
				:public_ip => addr)
			r.assigned_ips[instance.instanceId] = addr
		end
	end
end

#create_dns_entries(entries) ⇒ Object 



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# File 'lib/bigbang/explode.rb', line 128

def create_dns_entries(entries)
	entries.each do |entry|
		notify("creating domain #{entry[:domain]}.#{@config.domain} => #{entry[:value]}") do
			provider.create_dns(entry[:domain], entry[:value], entry[:type])
		end
	end
end

#create_lb(lb) ⇒ Object 



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# File 'lib/bigbang/explode.rb', line 171

def create_lb(lb)
	p = notify("creating ELB #{lb.name}") do
		provider.elb.create_load_balancer(
			:load_balancer_name => lb.name,
			:listeners => lb.listeners,
			:availability_zones => lb.availability_zones)
	end
	p
end

#create_load_balancers ⇒ Object 



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# File 'lib/bigbang/explode.rb', line 181

def create_load_balancers
	@runs.each do |r|
		next unless r.is_a?(ClusterRun)
		next if r.lb.nil?

		r.lb.ec2_elb = create_lb(r.lb)

		notify("registering instances to ELB #{r.lb.name}") do
			provider.elb.register_instances_with_load_balancer(
				:load_balancer_name => r.lb.name,
				:instances => r.ec2_instances
			)
		end
	end
end

#dns_entry_for(instance, universe_name, domain, addr, wildcard) ⇒ Object 



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# File 'lib/bigbang/explode.rb', line 118

def dns_entry_for(instance, universe_name, domain, addr, wildcard)
	entries = []
	domain = "#{universe_name}.#{domain}"
	entries << {:domain => domain, :value => addr, :type => 'A'}
	if wildcard == true
		entries << {:domain => "*.#{domain}", :value => addr, :type => 'A'}
	end
	entries
end

#elb_dns_entries(universe_name) ⇒ Object 



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# File 'lib/bigbang/explode.rb', line 197

def elb_dns_entries(universe_name)
	entries = []
	configured_elbs.each do |lb|
		lb.domains.each do |domain|
			subdomain = "#{universe_name}.#{domain}"
			cname = lb.ec2_elb.CreateLoadBalancerResult.DNSName
			entries << { :domain => subdomain, :value => cname, :type => "CNAME" }
		end
	end
	entries
end

#explode(name) ⇒ Object 



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# File 'lib/bigbang/explode.rb', line 209

def explode(name)
	free_eips = allocate_addresses
	run_instances(name)
	unless free_eips.empty?
		confirm("Will assign the following ips:\n" +
			"#{free_eips.join("\n")}\nConfirm") do
			assign_addresses(free_eips)
		end
	end
	create_load_balancers
	dns_entries = elb_dns_entries(name)
	dns_entries += instance_dns_entries(name)
	create_dns_entries(dns_entries)
end

#instance_dns_entries(universe_name) ⇒ Object 



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# File 'lib/bigbang/explode.rb', line 136

def instance_dns_entries(universe_name)
	entries = []
	instances_map = get_instances_map
	@runs.each do |r|
		addsufix = false
		if r.is_a?(ClusterRun)
			addsufix = true
		end

		domains = [r.domain]
		if r.domain.is_a?(Array)
			domains = r.domain
		end

		sufix = 0
		r.ec2_instances.each do |instance_id|
			instance = instances_map[instance_id]
			domains.each do |domain|
				addr = r.assigned_ips[instance.instanceId]
				# use the elastic ip
				if addr.nil?
					addr = instance.ipAddress
				end

				if addsufix
					domain = "#{domain}#{sufix}"
				end
				entries += dns_entry_for(instance, universe_name, domain, addr, r.wildcard_domain)
			end
			sufix += 1
		end
	end
	entries
end

#run_instance(instance, userdata, zone, size) ⇒ Object 



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# File 'lib/bigbang/explode.rb', line 70

def run_instance(instance, userdata, zone, size)
	notify("launching #{size} instance(s) on availability zone '#{zone}'") do
		provider.ec2.run_instances(
			:image_id => instance.ami,
			:key_name => instance.key_name,
			:instance_type => instance.type,
			:user_data => userdata,
			:availability_zone => zone,
			:min_count => size,
			:max_count => size
		)
	end
end

#run_instances(name) ⇒ Object 



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# File 'lib/bigbang/explode.rb', line 84

def run_instances(name)
	instances = []
	gen = Ec2BootstrapGenerator.new
	@runs.each do |r|
		instance = r.instance
		userdata = Base64.encode64(gen.generate_from_hash(
			"bootstrap-repo" => instance.bootstrap_repo
		))
		r.zones.each_pair do |zone,size|
			res = run_instance(instance, userdata, zone, size)
			res.instancesSet.item.each do |i|
				instances << i
				r.ec2_instances << i.instanceId
				tag_instance(instance, i, name)
			end
		end
	end
	wait_for_running(instances)
end

#tag_instance(instance, ec2_instance, name) ⇒ Object 



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# File 'lib/bigbang/explode.rb', line 62

def tag_instance(instance, ec2_instance, name)
	provider.ec2.create_tags(:resource_id => ec2_instance.instanceId,
			:tag => [
					{ 'bb_name' => instance.name },
					{ 'bb_universe' => name},
			])
end

#wait_for_eips(expected) ⇒ Object 



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# File 'lib/bigbang/explode.rb', line 3

def wait_for_eips(expected)
	print "waiting for eips to be allocated"
	STDOUT.flush
	addrs = provider.free_eips
	while(addrs.size < expected)
		sleep(1)
		print "."
		STDOUT.flush
		addrs = provider.free_eips
	end
	puts
	addrs
end

#wait_for_running(instances) ⇒ Object 



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# File 'lib/bigbang/explode.rb', line 51

def wait_for_running(instances)
	ids = instances.collect { |i| i.instanceId }.to_set
	notify("Waiting for all instances to be in running state. ") do
		while running_instances_count(ids) < instances.size
			print "."
			STDOUT.flush
			sleep(5)
		end
	end
end