Class: AWS::Provision

Inherits:
Object
  • Object
show all
Includes:
Utils
Defined in:
lib/conan/cloud/aws/provision.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Methods included from Utils

#all_availability_zones, #all_regions, #default_availability_zone, #default_image_id, #ec2_name_tag, #elasticache_name_tag, #find_server_by_name, #list_stage_servers, #rds_name_tag

Constructor Details

#initialize(stage = 'production', aws_config = {}, application = nil) ⇒ Provision

Returns a new instance of Provision.



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# File 'lib/conan/cloud/aws/provision.rb', line 15

def initialize(stage = 'production', aws_config = {}, application = nil)
  @aws_config = aws_config
  @stage = stage
  @application = application
end

Instance Attribute Details

#application ⇒ Object

Returns the value of attribute application.



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# File 'lib/conan/cloud/aws/provision.rb', line 13

def application
  @application
end

#aws_config ⇒ Object

Returns the value of attribute aws_config.



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# File 'lib/conan/cloud/aws/provision.rb', line 13

def aws_config
  @aws_config
end

#stage ⇒ Object

Returns the value of attribute stage.



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# File 'lib/conan/cloud/aws/provision.rb', line 13

def stage
  @stage
end

Instance Method Details

#build_env ⇒ Object 



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# File 'lib/conan/cloud/aws/provision.rb', line 47

def build_env

  raise "Settings file at ~/.fog not found" unless File.exists?("#{ENV['HOME']}/.fog")

  #first key_pairs
  key_pairs = aws_config["key_pairs"]

  key_pairs.each do |name, conf|
    create_key_pair(name, conf)
  end unless key_pairs.nil?

  security_groups = aws_config["security"]

  if security_groups.nil? or security_groups.size == 0
    create_default_security_groups()
  else
    security_groups["ec2"].each do |name, conf|
      create_ec2_security_group(name, conf)
    end unless security_groups["ec2"].nil?

    security_groups["rds"].each do |name, conf|
      create_rds_security_group(name, conf)
    end unless security_groups["rds"].nil?

    security_groups["elasticache"].each do |name, conf|
      create_elasticache_security_group(name, conf)
    end unless security_groups["elasticache"].nil?
  end

  aws_config.each do |type, resources|
     case type
     when "ec2"
       resources.each do |name, conf|
         create_ec2_server(name, conf)
       end
     when "rds"
       resources.each do |name, conf|
         create_rds_server(name, conf)
       end
     when "s3"
       resources.each do |name, conf|
         create_s3_bucket(name, conf)
       end
     when "elb"
       resources.each do |name,conf|
         create_elb(name, conf)
       end
     when "elasticache"
       resources.each do |name,conf|
         create_elasticache_cluster(name,conf)
       end
     end
  end
end

#create_default_security_groups ⇒ Object 



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# File 'lib/conan/cloud/aws/provision.rb', line 124

def create_default_security_groups()
  create_ec2_security_group('default', {:ports => ["22", "80"]})
  create_rds_security_group('default', {:ec2_security_groups => ["default"]})
end

#create_ec2_security_group(name, config = {}) ⇒ Object 



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# File 'lib/conan/cloud/aws/provision.rb', line 129

def create_ec2_security_group(name, config = {})
  new_conf = config.inject({}){|memo,(k,v)| memo[k.to_sym] = v; memo} 
  region = new_conf[:region] || "us-east-1"

  compute = Fog::Compute.new(:provider => :aws, :region => region)

  sg_name = ec2_name_tag(name)

  sg = compute.security_groups.get(sg_name)
  if sg.nil?
    puts "Creating EC2 Secruity Group #{sg_name}"
    sg = compute.security_groups.create(:name => sg_name, :description => "#{name} Security Group for #{stage}")
    new_conf[:ingress].each do |ingress|
      ingress = ingress.inject({}){|memo,(k,v)| memo[k.to_sym] = v; memo} 
      port = ingress.delete(:port)
      if ingress[:group_name]
        ingress[:group_name] = ec2_name_tag(ingress[:group_name]) 
        sg.authorize_ip_permission(Range.new(port.to_i,port.to_i),ingress)
      else
        sg.authorize_port_range(Range.new(port.to_i,port.to_i),ingress)
      end
    end unless new_conf[:ingress].nil?
  else
    puts "EC2 Security Group #{sg_name} already exists. Skipping"
  end

end

#create_ec2_server(name, config = {}) ⇒ Object 



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# File 'lib/conan/cloud/aws/provision.rb', line 296

def create_ec2_server(name, config = {})
  new_conf = config.inject({}){|memo,(k,v)| memo[k.to_sym] = v; memo}
  region = new_conf[:region] || "us-east-1"

  compute = Fog::Compute.new(:provider => :aws, :region => region)
  default_key_name = compute.key_pairs.all.first.name

  default_params = { :availability_zone => default_availability_zone(region), 
                     :flavor_id => "m1.small", 
                     :monitoring => true,
                     :key_name => default_key_name, 
                     :root_device_type => "instance-store" 
                   }

  params = default_params.merge(new_conf)
  params[:image_id] = default_image_id(region, params[:flavor_id], params[:root_device_type]) if params[:image_id].nil?

  tags  = {}

  #need to parse all servers to see if this one exists
  server = find_server_by_name(name, region)

  #need to bork if no name in config file
  ec2_name = ec2_name_tag(name)

  unless server
    puts "Creating EC2 Server named #{ec2_name}"
    tags[:name] = ec2_name
    tags[:Name] = ec2_name
    tags[:stage] = stage

    if new_conf[:roles] 
      new_conf[:roles] << stage unless new_conf[:roles].include? stage 
      tags[:roles] = new_conf[:roles].join(', ')
    else
      tags[:roles] = "app, db, #{stage}"
    end

    params[:tags] = tags

    if new_conf[:groups] and new_conf[:groups].size > 0
      params[:groups] = new_conf[:groups].collect { |g| "#{stage}-#{g}" }
    else
      params[:groups] = ["#{stage}-default"]
    end

    server = compute.servers.create(params)
    server.wait_for { ready? } 
  else
    puts "EC2 Server named #{ec2_name} already exists. Skipping"
  end

end

#create_elasticache_cluster(name, config = {}) ⇒ Object 



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# File 'lib/conan/cloud/aws/provision.rb', line 394

def create_elasticache_cluster(name, config = {})
  unless Fog.mocking?
    new_conf = config.inject({}){|memo,(k,v)| memo[k.to_sym] = v; memo}
    region = new_conf[:region] || "us-east-1"

    elasticache = Fog::AWS::Elasticache.new(:region => region)

    default_params = { :node_type => "cache.m1.large", 
                       :num_nodes => 1,
                       :port => 11211, 
                       :preferred_availability_zone => default_availability_zone(region) 
                     }

    params = default_params.merge(new_conf)

    if new_conf[:security_groups] and new_conf[:security_groups].size > 0
      params[:security_group_names] = new_conf[:security_groups].collect { |g| elasticache_name_tag(g)  }
    else
      params[:security_group_names] = [elasticache_name_tag('default')]
    end

    cluster_name = ec2_name_tag(name) 

    cl = begin
           elasticache.clusters.get(cluster_name)
         rescue Excon::Errors::NotFound
           nil
         end

    unless cl
      puts "Creating ElastiCache cluster #{cluster_name}"
      params[:id] = cluster_name
      cl = elasticache.clusters.new(params)
      cl.save
    else
      puts "Elasticache cluster #{cluster_name} already exists. Skipping"
    end

  end
end

#create_elasticache_security_group(name, config = {}) ⇒ Object 



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# File 'lib/conan/cloud/aws/provision.rb', line 184

def create_elasticache_security_group(name, config = {})
  unless Fog.mocking?
    new_conf = config.inject({}){|memo,(k,v)| memo[k.to_sym] = v; memo}
    region = new_conf[:region] || "us-east-1"
    elasticache = Fog::AWS::Elasticache.new(:region => region)

    cache_sg_name = elasticache_name_tag(name)

    sg_exists = false
    body = elasticache.describe_cache_security_groups.body
    sg_exists = body['CacheSecurityGroups'].any? do |group|
      group['CacheSecurityGroupName'] == cache_sg_name
    end

    unless sg_exists
      puts "Creating Elasticache Security Group #{cache_sg_name}"
      body = elasticache.create_cache_security_group(cache_sg_name, "#{cache_sg_name} ElastiCache Security Group for #{stage}").body
      new_conf[:ec2_security_groups].each do |ec2_group|
        compute = Fog::Compute.new(:provider => :aws, :region => region)
        sg_name = ec2_name_tag(ec2_group)
        sg = compute.security_groups.get(sg_name)
        body = elasticache.authorize_cache_security_group_ingress(
          cache_sg_name, sg.name, sg.owner_id).body
      end
    else
      puts "Elasticache Security Group #{cache_sg_name} already exists. Skipping"
    end

  end
end

#create_elb(name, config = {}) ⇒ Object 



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# File 'lib/conan/cloud/aws/provision.rb', line 236

def create_elb(name, config = {})
  new_conf = config.inject({}){|memo,(k,v)| memo[k.to_sym] = v; memo}
  region = new_conf[:region] || "us-east-1"

  elb = Fog::AWS::ELB.new(:region => region)

  zones = new_conf[:availability_zones] || all_availability_zones(region)

  elb_name = ec2_name_tag(name)

  lb = begin
         elb.load_balancers.get(elb_name)
       rescue Excon::Errors::BadRequest, Excon::Errors::NotFound
         nil
       end

  if lb.nil?
    puts "Creating Elastic Load Balancer #{elb_name}"
  
    listeners = [];
    
    if new_conf[:listeners].nil?
      list = Fog::AWS[:elb].listeners.new()
      listeners << { 'Listener' => list.to_params, 'PolicyNames' => [] }
    else 
      new_conf[:listeners].each do |listener|
        listener = listener.inject({}){|memo,(k,v)| memo[k.to_sym] = v; memo}
        list = Fog::AWS[:elb].listeners.new(listener)
        listeners << { 'Listener' => list.to_params, 'PolicyNames' => [] }
      end
    end
  
    lb = elb.load_balancers.create(:id => elb_name, :availability_zones => zones, 'ListenerDescriptions' => listeners)

    compute = Fog::Compute.new(:provider => :aws, :region => region)

    new_conf[:ingress_for].each do |ingress|
      ingress = ingress.inject({}){|memo,(k,v)| memo[k.to_sym] = v; memo} 
      port = ingress.delete(:port)
      sg_name = ec2_name_tag(ingress[:group_name]) 
      sg = compute.security_groups.get(sg_name)
      lbsgparams = {:group_name => lb.source_group['GroupName'], :user_id => lb.source_group['OwnerAlias']}
      sg.authorize_ip_permission(Range.new(port.to_i,port.to_i),lbsgparams)
    end unless new_conf[:ingress_for].nil?

    inst_servers = new_conf[:servers].map { |s| ec2_name_tag(s) } unless new_conf[:servers].nil?

    list_stage_servers(region).each do |server|
      #the mocking seems wrong
      unless Fog.mocking?
        name = server.tags["name"]
        lb.register_instances(server.id) if (inst_servers.nil? or inst_servers.include?(name))
      end
    end
  else
    puts "Elastic Load Balancer #{elb_name} already exists. Skipping"
  end

end

#create_key_pair(name, config = {}) ⇒ Object 



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# File 'lib/conan/cloud/aws/provision.rb', line 102

def create_key_pair(name, config = {})
  new_conf = config.inject({}){|memo,(k,v)| memo[k.to_sym] = v; memo} 
  region = new_conf[:region] || "us-east-1"
  compute = Fog::Compute.new(:provider => :aws, :region => region)

  kp = compute.key_pairs.get(name)
  if kp.nil?
    #no key pair create and write it out
    puts "Creating key-pair #{name}"
    kp = compute.key_pairs.create(:name => name)

    puts "Writing key into your .ssh directory and adding it to ssh agent"
    File.open("#{ENV['HOME']}/.ssh/#{kp.name}.pem", "w") do |io|
      io << kp.private_key 
    end
    system("chmod 600 #{ENV['HOME']}/.ssh/#{kp.name}.pem")
    system("ssh-add #{ENV['HOME']}/.ssh/#{kp.name}.pem")
  else
    puts "Key-pair #{name} already exists. Skipping"
  end
end

#create_rds_security_group(name, config = {}) ⇒ Object 



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# File 'lib/conan/cloud/aws/provision.rb', line 157

def create_rds_security_group(name, config = {})
  unless Fog.mocking?
    new_conf = config.inject({}){|memo,(k,v)| memo[k.to_sym] = v; memo}
    region = new_conf[:region] || "us-east-1"
    rds = Fog::AWS::RDS.new(:region => region)

    rdssg_name = rds_name_tag(name)

    rdssg = begin
              rds.security_groups.get(rdssg_name)
            rescue Excon::Errors::NotFound
              nil
            end

    if rdssg.nil?
      puts "Creating RDS Security Group #{rdssg_name}"
      rdssg = rds.security_groups.create(:id => rdssg_name, :description => "#{name} DB Security Group For #{stage}")
      new_conf[:ec2_security_groups].each do |ec2_group|
        rdssg.authorize_ec2_security_group("#{stage}-#{ec2_group}")
      end
    else
      puts "RDS Security Group #{rdssg_name} already exists. Skipping"
    end

  end
end

#create_rds_server(name, config = {}) ⇒ Object 



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# File 'lib/conan/cloud/aws/provision.rb', line 350

def create_rds_server(name, config = {})
  unless Fog.mocking?
    new_conf = config.inject({}){|memo,(k,v)| memo[k.to_sym] = v; memo}
    region = new_conf[:region] || "us-east-1"
    rds = Fog::AWS::RDS.new(:region => region)
    default_params = { :allocated_storage => 20, 
                       :engine => 'mysql',
                       :master_username => 'root', 
                       :password => 'password',
                       :backup_retention_period => 8, 
                       :multi_az => false,
                       :db_name =>"production", 
                       :availability_zone => default_availability_zone(region), 
                       :flavor_id => 'db.m1.small'
                     }
    params = default_params.merge(new_conf)

    params[:id] = ec2_name_tag(name)

    params.delete(:availability_zone) if params[:multi_az]

    if new_conf[:db_security_groups] and new_conf[:db_security_groups].size > 0
      params[:security_group_names] = new_conf[:db_security_groups].collect { |g| rds_name_tag(g) }
    else
      params[:security_group_names] = [rds_name_tag('default')]
    end

    server = begin
               rds.servers.get(params[:id])
             rescue Excon::Errors::NotFound
               nil
             end

    if server.nil?
      puts "Creating RDS Server #{params[:id]}"
      server = rds.servers.create(params)
    else
      puts "RDS Server #{params[:id]} already exists. Skipping"
    end
  else
    puts "Fog is mocking. Can't test with RDS Servers. Skipping"
  end
end

#create_s3_bucket(name, config = {}) ⇒ Object 



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# File 'lib/conan/cloud/aws/provision.rb', line 215

def create_s3_bucket(name, config = {})
  new_conf = config.inject({}){|memo,(k,v)| memo[k.to_sym] = v; memo}
  region = new_conf[:region] || "us-east-1"

  storage = Fog::Storage.new(:provider => :aws, :region => region)

  new_conf['LocationConstraint'] = new_conf.delete(:location_constraint) if new_conf[:location_constraint]

  begin
    bucket = storage.get_bucket(name)
    puts "S3 Bucket #{name} already exists. Skipping"
  rescue Excon::Errors::NotFound
    puts "Creating S3 Bucket #{name}"
    storage.put_bucket(name, new_conf)

    acl = new_conf[:acl] || 'public-read'

    storage.put_bucket_acl(name, acl)
  end
end

#describe_env(filter_role = nil) ⇒ Object 



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# File 'lib/conan/cloud/aws/provision.rb', line 21

def describe_env(filter_role = nil)
  server_config = {}
  servers = []
  all_regions.each do |region|
    compute = Fog::Compute.new(:provider => :aws, :region => region)
    compute.servers.all.each { |s| servers << s if s.state == 'running' }
  end
  stages = servers.map {|s| s.tags["stage"] }.uniq

  stages.each do | st|
    server_config[st] = {}
    servers.each do |server|
      if server.tags["stage"] == st && !server.tags["roles"].nil?
        config = {}
        config["roles"] = server.tags["roles"].split /,\s*|:/ || []
        config["alias"] = server.tags["name"]
        if filter_role.nil? || config["roles"].include?(filter_role)
          server_config[st][server.dns_name] = config
        end
      end 
    end
  end
  server_config

end