Class: Demeter::Aws::SecurityGroup

Inherits:
Object
  • Object
show all
Defined in:
lib/demeter/aws/security_group.rb

Instance Method Summary collapse

Constructor Details

#initialize(ec2) ⇒ SecurityGroup

Returns a new instance of SecurityGroup.



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# File 'lib/demeter/aws/security_group.rb', line 7

def initialize(ec2)
  @ec2 = ec2
  @_sg = {}
  @_local_sg = {}
end

Instance Method Details

#create ⇒ Object 



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# File 'lib/demeter/aws/security_group.rb', line 233

def create
  if @_sg.empty?
    # update variables
    local_sg = update_vars(@_local_sg)
    # update once again to replace deep variable links
    local_sg = update_vars(@_local_sg)

    resp = @ec2.create_security_group({
      group_name: local_sg[:name],
      description: local_sg[:description], # required
      vpc_id: local_sg[:vpc_id]
    })

    @ec2.create_tags(:resources => [resp.group_id], :tags => [
      { :key => 'Name', :value => local_sg[:name] }
    ])

    puts "Created SG: #{local_sg['name']} (#{resp.group_id})"
    true
  end
end

#diff ⇒ Object 



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# File 'lib/demeter/aws/security_group.rb', line 172

def diff
  sg = @_sg.select{ |key, value| true if key == :ingress || key == :egress }
  
  # update variables
  local_sg = update_vars(@_local_sg.select{ |key, value| true if key == :ingress || key == :egress })
  # update once again to replace deep variable links
  local_sg = update_vars(local_sg)

  if sg[:ingress]
    sg[:ingress].sort_by! { |x| x.to_s }
  end

  if local_sg[:ingress]
    local_sg[:ingress].sort_by! { |x| x.to_s }
  end

  if sg[:egress]
    sg[:egress].sort_by! { |x| x.to_s }
  end

  if local_sg[:egress]
    local_sg[:egress].sort_by! { |x| x.to_s }
  end
  diff = HashDiff.diff(sg, local_sg)
end

#group_id ⇒ Object 



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# File 'lib/demeter/aws/security_group.rb', line 13

def group_id
  Demeter::vars["security_group.#{project_key}.id"]
end

#group_name ⇒ Object 



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# File 'lib/demeter/aws/security_group.rb', line 168

def group_name 
  security_group[:name]
end

#hash ⇒ Object 



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# File 'lib/demeter/aws/security_group.rb', line 151

def hash
  group_name
end

#load_aws(object) ⇒ Object 



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# File 'lib/demeter/aws/security_group.rb', line 17

def load_aws(object)
  if object.is_a?(::Aws::EC2::Types::SecurityGroup)
    name_tag = object['tags'].detect{|tag| tag['key'].downcase == 'name'}
    @_sg[:name] = (name_tag ? name_tag['value'] : object.group_name)
    @_sg[:description] = object.description
    @_sg[:vpc_id] = object.vpc_id
    @_sg[:ingress] = []
    @_sg[:egress] = []

    Demeter::set_var("security_group.#{project_key}.id", object.group_id)

    # INGRESS
    object.ip_permissions.each do |rule|
      rule.ip_ranges.each do |cidr_block|
        @_sg[:ingress] << {
          protocol: rule.ip_protocol.to_s,
          from_port: rule.from_port.to_i,
          to_port: rule.to_port.to_i,
          cidr_block: cidr_block.cidr_ip
        }    
      end

      rule.user_id_group_pairs.each do |source_security_group|
        @_sg[:ingress] << {
          protocol: rule.ip_protocol.to_s,
          from_port: rule.from_port.to_i,
          to_port: rule.to_port.to_i,
          source_security_group: source_security_group.group_id
        }
      end
    end

    # EGRESS
    object.ip_permissions_egress.each do |rule|
      rule.ip_ranges.each do |cidr_block|
        @_sg[:egress] << {
          protocol: rule.ip_protocol.to_s,
          from_port: rule.from_port.to_i,
          to_port: rule.to_port.to_i,
          cidr_block: cidr_block.cidr_ip
        }    
      end

      rule.user_id_group_pairs.each do |source_security_group|
        @_sg[:egress] << {
          protocol: rule.ip_protocol.to_s,
          from_port: rule.from_port.to_i,
          to_port: rule.to_port.to_i,
          source_security_group: source_security_group.group_id
        }
      end
    end
    return true  
  end
end

#load_local(object) ⇒ Object 



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# File 'lib/demeter/aws/security_group.rb', line 73

def load_local(object)
  if object.is_a?(Hash)
    @_local_sg[:name] = object['name']
    @_local_sg[:description] = 'Managed by Demeter'
    @_local_sg[:ingress] = []
    @_local_sg[:egress] = []
    @_local_sg[:vpc_id] = object['vpc_id']

    if !Demeter::vars.has_key?("security_group.#{project_key}.id")
      Demeter::set_var("security_group.#{project_key}.id", "security_group.#{project_key}.id")
    end

    # INGRESS 
    if object['ingress']
      object['ingress'].each do |rule|
        if rule.has_key?('cidr_blocks')  
          rule['cidr_blocks'].to_a.each do |cidr_block|
            @_local_sg[:ingress] << {
              protocol: rule['protocol'].to_s,
              from_port: rule['from_port'].to_i,
              to_port: rule['to_port'].to_i,
              cidr_block: cidr_block
            }    
          end
        end

        if rule.has_key?('source_security_groups') 
          rule['source_security_groups'].to_a.each do |source_security_group|
            @_local_sg[:ingress] << {
              protocol: rule['protocol'].to_s,
              from_port: rule['from_port'].to_i,
              to_port: rule['to_port'].to_i,
              source_security_group: source_security_group
            }
          end
        end
      end
    end 

    # EGRESS 
    if object['egress']
      object['egress'].each do |rule|
        if rule.has_key?('cidr_blocks') 
          rule['cidr_blocks'].to_a.each do |cidr_block|
            @_local_sg[:egress] << {
              protocol: rule['protocol'].to_s,
              from_port: rule['from_port'].to_i,
              to_port: rule['to_port'].to_i,
              cidr_block: cidr_block
            }    
          end
        end

        if rule.has_key?('source_security_groups') 
          rule['source_security_groups'].to_a.each do |source_security_group|
            @_local_sg[:egress] << {
              protocol: rule['protocol'].to_s,
              from_port: rule['from_port'].to_i,
              to_port: rule['to_port'].to_i,
              source_security_group: source_security_group
            }
          end
        end
      end
    end

    return true
  end
end

#modify ⇒ Object 



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# File 'lib/demeter/aws/security_group.rb', line 255

def modify
  the_diff = diff
  pluses = the_diff.select { |s| s[0] == "+" }
  minuses = the_diff.select { |s| s[0] == "-" }
  pluses.each do |plus|
    next if plus[1] == "description"
    values = plus[2]
    if values.has_key?(:cidr_block)
      if plus[1].include?('ingress') 
        @ec2.authorize_security_group_ingress({
          group_id: group_id,
          ip_protocol: values[:protocol],
          from_port: values[:from_port],
          to_port: values[:to_port],
          cidr_ip: values[:cidr_block],
        })
      else
        @ec2.authorize_security_group_egress({
          group_id: group_id,
          ip_permissions: [{
            ip_protocol: values[:protocol],
            from_port: values[:from_port],
            to_port: values[:to_port],
            ip_ranges: [
              {
                cidr_ip: values[:cidr_block]
              }
            ]
          }]
        })
      end
    elsif values.has_key?(:source_security_group)
      if plus[1].include?('ingress') 
        @ec2.authorize_security_group_ingress({
          group_id: group_id,
          ip_permissions: [{
            ip_protocol: values[:protocol],
            from_port: values[:from_port],
            to_port: values[:to_port],
            user_id_group_pairs: [{
              group_id: values[:source_security_group]
            }]
          }]
        })
      else
        @ec2.authorize_security_group_egress({
          group_id: group_id,
          ip_permissions: [{
            ip_protocol: values[:protocol],
            from_port: values[:from_port],
            to_port: values[:to_port],
            user_id_group_pairs: [{
              group_id: values[:source_security_group]
            }]
          }]
        })
      end
    end
  end
  minuses.each do |minus|
    values = minus[2]
    if values.has_key?(:cidr_block)
      if minus[1].include?('ingress') 
        @ec2.revoke_security_group_ingress({
          group_id: group_id,
          ip_protocol: values[:protocol],
          from_port: values[:from_port],
          to_port: values[:to_port],
          cidr_ip: values[:cidr_block],
        })
      else
        @ec2.revoke_security_group_egress({
          group_id: group_id,
          ip_permissions: [{
            ip_protocol: values[:protocol],
            from_port: values[:from_port],
            to_port: values[:to_port],
            ip_ranges: [
              {
                cidr_ip: values[:cidr_block]
              }
            ]
          }]
        })
      end
    elsif values.has_key?(:source_security_group)
      if minus[1].include?('ingress') 
        @ec2.revoke_security_group_ingress({
          group_id: group_id,
          ip_permissions: [{
            ip_protocol: values[:protocol],
            from_port: values[:from_port],
            to_port: values[:to_port],
            user_id_group_pairs: [{
              group_id: values[:source_security_group]
            }]
          }]
        })
      else
        @ec2.revoke_security_group_egress({
          group_id: group_id,
          ip_permissions: [{
            ip_protocol: values[:protocol],
            from_port: values[:from_port],
            to_port: values[:to_port],
            user_id_group_pairs: [{
              group_id: values[:source_security_group]
            }]
          }]
        })
      end
    end
  end
end

#project_key ⇒ Object 



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# File 'lib/demeter/aws/security_group.rb', line 155

def project_key
  security_group[:name]
    .gsub('::', '_')
    .gsub('/', '_')
    .gsub('-', '_')
    .gsub(' ', '_')
    .downcase
end

#project_name ⇒ Object 



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# File 'lib/demeter/aws/security_group.rb', line 164

def project_name
  security_group[:name].split('::')[1]
end

#security_group ⇒ Object 



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# File 'lib/demeter/aws/security_group.rb', line 143

def security_group
  if @_sg.empty?
    @_local_sg
  else
    @_sg
  end
end

#update_vars(hash = @_local_sg) ⇒ Object 



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# File 'lib/demeter/aws/security_group.rb', line 198

def update_vars(hash=@_local_sg)
  hash.each do |k, v|
    if v.is_a?(String)
      if /\<\%(.*)\%\>/.match(v)
        var_keys = /\<\%(.*)\%\>/.match(v).captures
        if Demeter::vars.has_key?(var_keys[0].strip)
          hash[k] = Demeter::vars[var_keys[0].strip]
          if hash[k].is_a?(Array)
            extended = []
            hash[k].each do |value|
              h1 = hash.clone
              h1[k] = value
              extended << h1
            end
            hash = extended
          end
        else
          fail "Key #{v} not found!"
        end
      end
    elsif v.is_a?(Hash)
      hash[k] = update_vars v
    elsif v.is_a?(Array)
      tmp = []
      v.flatten.each do |x| 
        if x.is_a?(Hash)
          tmp << update_vars(x)
        end
      end
      hash[k] = tmp.flatten
    end
  end
  hash
end