Class: BuildCloud::IAMGroup

Inherits:
Object
  • Object
show all
Includes:
Component
Defined in:
lib/build-cloud/iamgroup.rb

Constant Summary collapse

@@objects = 
[]

Instance Method Summary collapse

Methods included from Component

included

Constructor Details

#initialize(fog_interfaces, log, options = {}) ⇒ IAMGroup

Returns a new instance of IAMGroup.



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# File 'lib/build-cloud/iamgroup.rb', line 9

def initialize ( fog_interfaces, log, options = {} )

    @iam     = fog_interfaces[:iam]
    @log     = log
    @options = options

    @log.debug( options.inspect )

    required_options(:name)

end

Instance Method Details

#create ⇒ Object 



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# File 'lib/build-cloud/iamgroup.rb', line 21

def create
    
    policies = @options.delete(:policies)
    users = @options.delete(:users)
    
    unless exists?

        @log.info( "Creating new IAM group #{@options[:name]}" )

        group = @iam.groups.new( @options )
        group.save

        @log.debug( group.inspect )
        
    end
    
    rationalise_policies ( policies )
    rationalise_users ( users )
    
end

#delete ⇒ Object 



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# File 'lib/build-cloud/iamgroup.rb', line 226

def delete

    return unless exists?
    @log.info( "Deleting IAM group for #{@options[:name]}" )

    #detach all policies
    fog_object.attached_policies.each do |p|
        fog_object.detach(p)
    end
    
    fog_object.policies.each do |p|
        @iam.delete_user_policy(@options[:id], p.id)
    end
    
    #remove all users
    fog_object.users.each do |u|
        @iam.remove_user_from_group(fog_object.name, u.id)
    end
        
    fog_object.destroy
end

#rationalise_policies(policies) ⇒ Object 



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# File 'lib/build-cloud/iamgroup.rb', line 47

def rationalise_policies( policies )

    policies = {} if policies.nil?

    managed_policies_to_add  = []
    group_policies_to_add  = []
    current_managed_policies = []
    current_group_policies = []
    
    fog_object.attached_policies.each do |p|
        current_managed_policies << { :arn => p.arn }
    end
    
    # fog_object.policies doesn't return id/policy name
    @iam.list_group_policies(fog_object.name).body['PolicyNames'].each do |pn|
        p = @iam.get_group_policy(pn, fog_object.name).body
        policy = { :document => p['Policy']['PolicyDocument'], :id => p['PolicyName'] }
        current_group_policies << policy
    end

    # Build add lists
    policies.each do |p|
        @log.debug("Policy action on is #{p}")
        if p[:arn]
            @log.debug("For group #{fog_object.name} checking managed policy #{p[:arn]}")
            # Assume adding policy
            add_policy = true
            current_managed_policies.each do |cmp|
                add_policy = false if cmp[:arn] == p[:arn]
            end
            if add_policy   
                @log.debug("Adding #{p[:arn]} to list" ) 
                managed_policies_to_add << { :arn => p[:arn] }
            end
        elsif p[:id]
            @log.debug("For group #{fog_object.name} checking policy #{p[:id]}")
            # Assume adding policy
            pa = {
                :document => JSON.parse(p[:document]),
                :id       => p[:id],
            }
            group_policies_to_add << pa
        end
    end
    
    policies.each do |p|
        # If we find a current policy that matches the desired policy, then
        # remove that from the list of current policies - we will remove any
        # remaining policies
        if p[:arn]
            current_managed_policies.delete_if do |c|
                if c[:arn] == p[:arn]
                    @log.debug( "#{p[:arn]} already exists" )
                    true # so that delete_if removes the list item
                else
                    false
                end
            end
        elsif p[:id]
            current_group_policies.delete_if do |c|
                if c[:id] == p[:id]
                    @log.debug( "#{p[:id]} already exists" )
                    
                    # Remove from the policies to add if the policy documents match
                    group_policies_to_add.delete_if do |a|
                        if (c[:id] == a[:id]) and
                           (c[:document] == a[:document])
                            @log.debug("#{p[:id]} is a match" )
                            true
                        else
                            false
                        end
                    end
                    true # so that delete_if removes the list item
                else
                    false
                end
            end
        end
    end

    # At the end of this loop, anything left in the user_current_policies list
    # represents a policy that's present on the infra, but should be deleted
    # (since there's no matching desired policy), so delete those.
    # Changing a rule maps to "delete old rule, create new one".

    current_group_policies.each do |p|
        @log.debug( "Removing policy #{p.inspect}" )
        @log.info( "For group #{fog_object.name} removing policy #{p[:id]}" )
        @iam.delete_group_policy(fog_object.name, p[:id])
    end

    group_policies_to_add.each do |p|
        @log.debug( "For group #{fog_object.name} adding/updating policy #{p}" )
        @log.info( "For group #{fog_object.name} adding/updating policy #{p[:id]}" )
        @iam.put_group_policy( fog_object.name, p[:id], p[:document] )
    end
    
    # And the same for managed policies, but we just detatch them:
    current_managed_policies.each do |p|
        @log.debug( "Detatching policy #{p.inspect}" )
        @log.info( "For group #{fog_object.name} detatcing policy #{p[:arn]}" )
        @iam.detach_group_policy(fog_object.name, p[:arn])
    end
    
    managed_policies_to_add.each do |p|
        @log.debug( "For group #{fog_object.name} attaching policy #{p}" )
        @log.info( "For group #{fog_object.name} attaching policy #{p[:arn]}" )
        @iam.attach_group_policy(fog_object.name, p[:arn])
    end
    
end

#rationalise_users(users) ⇒ Object 



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# File 'lib/build-cloud/iamgroup.rb', line 160

def rationalise_users( users )

    users = {} if users.nil?

    users_to_add  = []
    current_users = []
    
    @log.debug("Users info: #{@iam.get_group(@options[:name]).body['Users'].inspect}")
    # can't use fog_object.users as always empty
    @iam.get_group(@options[:name]).body['Users'].each do |u|
        current_users << { :id => u['UserName']}
    end
    
    @log.debug("Current users: #{current_users}")
    # Build list of users to add
    users.each do |u|
        @log.debug("User acting on is #{u}")
        @log.debug("For group #{fog_object.name} checking user #{u}")
        
        # Assume adding user
        add_user = true
        current_users.each do |cmu|
            add_user = false if cmu[:id] == u
        end
        if add_user
            # If we find a user that's not currently present we prepare to add it
            @log.debug("Adding #{u} to list" )
            users_to_add << { :id => u }
        end
    end
    
    # Find users to remove
    users.each do |u|
        # If we find a current user that matches the desired user, then
        # remove that from the list of current users - we will remove any
        # remaining users
        current_users.delete_if do |c|
            if c[:id] == u
                @log.debug( "#{u} already exists" )
                true # so that delete_if removes the list item
            else
                false
            end
        end
    end

    # At the end of this loop, anything left in the current_users list
    # represents a group that's present on the user, but should be removed
    # (since there's no matching desired group), so delete those.

    current_users.each do |u|
        @log.debug( "Removing group #{u.inspect} from #{u}" )
        @log.info( "For group #{fog_object.name} removing user #{u[:id]}" )
        @iam.remove_user_from_group(fog_object.name, u[:id])
    end
    
    users_to_add.each do |u|
        @log.debug( "For group #{fog_object.name} attaching user #{u}" )
        @log.info( "For group #{fog_object.name} attaching user #{u[:id]}" )
        fog_object.add_user(u[:id])
    end
    fog_object.save
end

#read ⇒ Object Also known as: fog_object 



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# File 'lib/build-cloud/iamgroup.rb', line 42

def read
    @iam.groups.select { |r| r.name == @options[:name] }.first
end