def update_stack(StackId=None, Name=None, Attributes=None, ServiceRoleArn=
    None, DefaultInstanceProfileArn=None, DefaultOs=None, HostnameTheme=
    None, DefaultAvailabilityZone=None, DefaultSubnetId=None, CustomJson=
    None, ConfigurationManager=None, ChefConfiguration=None,
    UseCustomCookbooks=None, CustomCookbooksSource=None, DefaultSshKeyName=
    None, DefaultRootDeviceType=None, UseOpsworksSecurityGroups=None,
    AgentVersion=None):
    """
    Updates a specified stack.
    See also: AWS API Documentation
    
    
    :example: response = client.update_stack(
        StackId='string',
        Name='string',
        Attributes={
            'string': 'string'
        },
        ServiceRoleArn='string',
        DefaultInstanceProfileArn='string',
        DefaultOs='string',
        HostnameTheme='string',
        DefaultAvailabilityZone='string',
        DefaultSubnetId='string',
        CustomJson='string',
        ConfigurationManager={
            'Name': 'string',
            'Version': 'string'
        },
        ChefConfiguration={
            'ManageBerkshelf': True|False,
            'BerkshelfVersion': 'string'
        },
        UseCustomCookbooks=True|False,
        CustomCookbooksSource={
            'Type': 'git'|'svn'|'archive'|'s3',
            'Url': 'string',
            'Username': 'string',
            'Password': 'string',
            'SshKey': 'string',
            'Revision': 'string'
        },
        DefaultSshKeyName='string',
        DefaultRootDeviceType='ebs'|'instance-store',
        UseOpsworksSecurityGroups=True|False,
        AgentVersion='string'
    )
    
    
    :type StackId: string
    :param StackId: [REQUIRED]
            The stack ID.
            

    :type Name: string
    :param Name: The stack's new name.

    :type Attributes: dict
    :param Attributes: One or more user-defined key-value pairs to be added to the stack attributes.
            (string) --
            (string) --
            

    :type ServiceRoleArn: string
    :param ServiceRoleArn: Do not use this parameter. You cannot update a stack's service role.

    :type DefaultInstanceProfileArn: string
    :param DefaultInstanceProfileArn: The ARN of an IAM profile that is the default profile for all of the stack's EC2 instances. For more information about IAM ARNs, see Using Identifiers .

    :type DefaultOs: string
    :param DefaultOs: The stack's operating system, which must be set to one of the following:
            A supported Linux operating system: An Amazon Linux version, such as Amazon Linux 2016.09 , Amazon Linux 2016.03 , Amazon Linux 2015.09 , or Amazon Linux 2015.03 .
            A supported Ubuntu operating system, such as Ubuntu 16.04 LTS , Ubuntu 14.04 LTS , or Ubuntu 12.04 LTS .
            CentOS Linux 7
            Red Hat Enterprise Linux 7
            A supported Windows operating system, such as Microsoft Windows Server 2012 R2 Base , Microsoft Windows Server 2012 R2 with SQL Server Express , Microsoft Windows Server 2012 R2 with SQL Server Standard , or Microsoft Windows Server 2012 R2 with SQL Server Web .
            A custom AMI: Custom . You specify the custom AMI you want to use when you create instances. For more information on how to use custom AMIs with OpsWorks, see Using Custom AMIs .
            The default option is the stack's current operating system. For more information on the supported operating systems, see AWS OpsWorks Stacks Operating Systems .
            

    :type HostnameTheme: string
    :param HostnameTheme: The stack's new host name theme, with spaces replaced by underscores. The theme is used to generate host names for the stack's instances. By default, HostnameTheme is set to Layer_Dependent , which creates host names by appending integers to the layer's short name. The other themes are:
            Baked_Goods
            Clouds
            Europe_Cities
            Fruits
            Greek_Deities
            Legendary_creatures_from_Japan
            Planets_and_Moons
            Roman_Deities
            Scottish_Islands
            US_Cities
            Wild_Cats
            To obtain a generated host name, call GetHostNameSuggestion , which returns a host name based on the current theme.
            

    :type DefaultAvailabilityZone: string
    :param DefaultAvailabilityZone: The stack's default Availability Zone, which must be in the stack's region. For more information, see Regions and Endpoints . If you also specify a value for DefaultSubnetId , the subnet must be in the same zone. For more information, see CreateStack .

    :type DefaultSubnetId: string
    :param DefaultSubnetId: The stack's default VPC subnet ID. This parameter is required if you specify a value for the VpcId parameter. All instances are launched into this subnet unless you specify otherwise when you create the instance. If you also specify a value for DefaultAvailabilityZone , the subnet must be in that zone. For information on default values and when this parameter is required, see the VpcId parameter description.

    :type CustomJson: string
    :param CustomJson: A string that contains user-defined, custom JSON. It can be used to override the corresponding default stack configuration JSON values or to pass data to recipes. The string should be in the following format:
            '{'key1': 'value1', 'key2': 'value2',...}'
            For more information on custom JSON, see Use Custom JSON to Modify the Stack Configuration Attributes .
            

    :type ConfigurationManager: dict
    :param ConfigurationManager: The configuration manager. When you update a stack, we recommend that you use the configuration manager to specify the Chef version: 12, 11.10, or 11.4 for Linux stacks, or 12.2 for Windows stacks. The default value for Linux stacks is currently 11.4.
            Name (string) --The name. This parameter must be set to 'Chef'.
            Version (string) --The Chef version. This parameter must be set to 12, 11.10, or 11.4 for Linux stacks, and to 12.2 for Windows stacks. The default value for Linux stacks is 11.4.
            

    :type ChefConfiguration: dict
    :param ChefConfiguration: A ChefConfiguration object that specifies whether to enable Berkshelf and the Berkshelf version on Chef 11.10 stacks. For more information, see Create a New Stack .
            ManageBerkshelf (boolean) --Whether to enable Berkshelf.
            BerkshelfVersion (string) --The Berkshelf version.
            

    :type UseCustomCookbooks: boolean
    :param UseCustomCookbooks: Whether the stack uses custom cookbooks.

    :type CustomCookbooksSource: dict
    :param CustomCookbooksSource: Contains the information required to retrieve an app or cookbook from a repository. For more information, see Creating Apps or Custom Recipes and Cookbooks .
            Type (string) --The repository type.
            Url (string) --The source URL.
            Username (string) --This parameter depends on the repository type.
            For Amazon S3 bundles, set Username to the appropriate IAM access key ID.
            For HTTP bundles, Git repositories, and Subversion repositories, set Username to the user name.
            Password (string) --When included in a request, the parameter depends on the repository type.
            For Amazon S3 bundles, set Password to the appropriate IAM secret access key.
            For HTTP bundles and Subversion repositories, set Password to the password.
            For more information on how to safely handle IAM credentials, see http://docs.aws.amazon.com/general/latest/gr/aws-access-keys-best-practices.html .
            In responses, AWS OpsWorks Stacks returns *****FILTERED***** instead of the actual value.
            SshKey (string) --In requests, the repository's SSH key.
            In responses, AWS OpsWorks Stacks returns *****FILTERED***** instead of the actual value.
            Revision (string) --The application's version. AWS OpsWorks Stacks enables you to easily deploy new versions of an application. One of the simplest approaches is to have branches or revisions in your repository that represent different versions that can potentially be deployed.
            

    :type DefaultSshKeyName: string
    :param DefaultSshKeyName: A default Amazon EC2 key-pair name. The default value is none . If you specify a key-pair name, AWS OpsWorks Stacks installs the public key on the instance and you can use the private key with an SSH client to log in to the instance. For more information, see Using SSH to Communicate with an Instance and Managing SSH Access . You can override this setting by specifying a different key pair, or no key pair, when you create an instance .

    :type DefaultRootDeviceType: string
    :param DefaultRootDeviceType: The default root device type. This value is used by default for all instances in the stack, but you can override it when you create an instance. For more information, see Storage for the Root Device .

    :type UseOpsworksSecurityGroups: boolean
    :param UseOpsworksSecurityGroups: Whether to associate the AWS OpsWorks Stacks built-in security groups with the stack's layers.
            AWS OpsWorks Stacks provides a standard set of built-in security groups, one for each layer, which are associated with layers by default. UseOpsworksSecurityGroups allows you to provide your own custom security groups instead of using the built-in groups. UseOpsworksSecurityGroups has the following settings:
            True - AWS OpsWorks Stacks automatically associates the appropriate built-in security group with each layer (default setting). You can associate additional security groups with a layer after you create it, but you cannot delete the built-in security group.
            False - AWS OpsWorks Stacks does not associate built-in security groups with layers. You must create appropriate EC2 security groups and associate a security group with each layer that you create. However, you can still manually associate a built-in security group with a layer on. Custom security groups are required only for those layers that need custom settings.
            For more information, see Create a New Stack .
            

    :type AgentVersion: string
    :param AgentVersion: The default AWS OpsWorks Stacks agent version. You have the following options:
            Auto-update - Set this parameter to LATEST . AWS OpsWorks Stacks automatically installs new agent versions on the stack's instances as soon as they are available.
            Fixed version - Set this parameter to your preferred agent version. To update the agent version, you must edit the stack configuration and specify a new version. AWS OpsWorks Stacks then automatically installs that version on the stack's instances.
            The default setting is LATEST . To specify an agent version, you must use the complete version number, not the abbreviated number shown on the console. For a list of available agent version numbers, call DescribeAgentVersions . AgentVersion cannot be set to Chef 12.2.
            Note
            You can also specify an agent version when you create or update an instance, which overrides the stack's default setting.
            

    """
    pass
