CloudFormationInit
- class aws_cdk.aws_ec2.CloudFormationInit(*args: Any, **kwargs)
Bases:
object
A CloudFormation-init configuration.
- ExampleMetadata:
infused
Example:
# my_bucket: s3.Bucket handle = ec2.InitServiceRestartHandle() ec2.CloudFormationInit.from_elements( ec2.InitFile.from_string("/etc/nginx/nginx.conf", "...", service_restart_handles=[handle]), ec2.InitSource.from_s3_object("/var/www/html", my_bucket, "html.zip", service_restart_handles=[handle]), ec2.InitService.enable("nginx", service_restart_handle=handle ))
Methods
- add_config(config_name, config)
Add a config with the given name to this CloudFormationInit object.
- Parameters:
config_name (
str
) –config (
InitConfig
) –
- Return type:
None
- add_config_set(config_set_name, config_names=None)
Add a config set with the given name to this CloudFormationInit object.
The new configset will reference the given configs in the given order.
- Parameters:
config_set_name (
str
) –config_names (
Optional
[Sequence
[str
]]) –
- Return type:
None
- attach(attached_resource, *, instance_role, platform, user_data, config_sets=None, embed_fingerprint=None, ignore_failures=None, include_role=None, include_url=None, print_log=None, signal_resource=None)
Attach the CloudFormation Init config to the given resource.
As an app builder, use
instance.applyCloudFormationInit()
orautoScalingGroup.applyCloudFormationInit()
to trigger this method.This method does the following:
Renders the
AWS::CloudFormation::Init
object to the given resource’s metadata, potentially adding aAWS::CloudFormation::Authentication
object next to it if required.Updates the instance role policy to be able to call the APIs required for
cfn-init
andcfn-signal
to work, and potentially add permissions to download referenced asset and bucket resources.Updates the given UserData with commands to execute the
cfn-init
script.
- Parameters:
attached_resource (
CfnResource
) –instance_role (
IRole
) – Instance role of the consuming instance or fleet.platform (
OperatingSystemType
) – OS Platform the init config will be used for.user_data (
UserData
) – UserData to add commands to.config_sets (
Optional
[Sequence
[str
]]) – ConfigSet to activate. Default: [‘default’]embed_fingerprint (
Optional
[bool
]) – Whether to embed a hash into the userData. Iftrue
(the default), a hash of the config will be embedded into the UserData, so that if the config changes, the UserData changes and the instance will be replaced. Iffalse
, no such hash will be embedded, and if the CloudFormation Init config changes nothing will happen to the running instance. Default: trueignore_failures (
Optional
[bool
]) – Don’t fail the instance creation when cfn-init fails. You can use this to prevent CloudFormation from rolling back when instances fail to start up, to help in debugging. Default: falseinclude_role (
Optional
[bool
]) – Include –role argument when running cfn-init and cfn-signal commands. This will be the IAM instance profile attached to the EC2 instance Default: falseinclude_url (
Optional
[bool
]) – Include –url argument when running cfn-init and cfn-signal commands. This will be the cloudformation endpoint in the deployed region e.g. https://cloudformation.us-east-1.amazonaws.com Default: falseprint_log (
Optional
[bool
]) – Print the results of running cfn-init to the Instance System Log. By default, the output of running cfn-init is written to a log file on the instance. Set this totrue
to print it to the System Log (visible from the EC2 Console),false
to not print it. (Be aware that the system log is refreshed at certain points in time of the instance life cycle, and successful execution may not always show up). Default: truesignal_resource (
Optional
[CfnResource
]) – When provided, signals this resource instead of the attached resource. You can use this to support signaling LaunchTemplate while attaching AutoScalingGroup Default: - if this property is undefined cfn-signal signals the attached resource
- Return type:
None
Static Methods
- classmethod from_config(config)
Use an existing InitConfig object as the default and only config.
- Parameters:
config (
InitConfig
) –- Return type:
- classmethod from_config_sets(*, configs, config_sets)
Build a CloudFormationInit from config sets.
- Parameters:
configs (
Mapping
[str
,InitConfig
]) – The sets of configs to pick from.config_sets (
Mapping
[str
,Sequence
[str
]]) – The definitions of each config set.
- Return type:
- classmethod from_elements(*elements)
Build a new config from a set of Init Elements.
- Parameters:
elements (
InitElement
) –- Return type: