BastionHostLinux

class aws_cdk.aws_ec2.BastionHostLinux(scope, id, *, vpc, availability_zone=None, block_devices=None, init=None, init_options=None, instance_name=None, instance_type=None, machine_image=None, require_imdsv2=None, security_group=None, subnet_selection=None, user_data_causes_replacement=None)

Bases: Resource

This creates a linux bastion host you can use to connect to other instances or services in your VPC.

The recommended way to connect to the bastion host is by using AWS Systems Manager Session Manager.

The operating system is Amazon Linux 2 with the latest SSM agent installed

You can also configure this bastion host to allow connections via SSH

Resource:: AWS::EC2::Instance
ExampleMetadata:: fixture=with-vpc infused

Example:

host = ec2.BastionHostLinux(self, "BastionHost",
    vpc=vpc,
    block_devices=[ec2.BlockDevice(
        device_name="/dev/sdh",
        volume=ec2.BlockDeviceVolume.ebs(10,
            encrypted=True
        )
    )]
)

Parameters:

scope (Construct) –
id (str) –
vpc (IVpc) – VPC to launch the instance in.
availability_zone (Optional[str]) – In which AZ to place the instance within the VPC. Default: - Random zone.
block_devices (Optional[Sequence[Union[BlockDevice, Dict[str, Any]]]]) – Specifies how block devices are exposed to the instance. You can specify virtual devices and EBS volumes. Each instance that is launched has an associated root device volume, either an Amazon EBS volume or an instance store volume. You can use block device mappings to specify additional EBS volumes or instance store volumes to attach to an instance when it is launched. Default: - Uses the block device mapping of the AMI
init (Optional[CloudFormationInit]) – Apply the given CloudFormation Init configuration to the instance at startup. Default: - no CloudFormation init
init_options (Union[ApplyCloudFormationInitOptions, Dict[str, Any], None]) – Use the given options for applying CloudFormation Init. Describes the configsets to use and the timeout to wait Default: - default options
instance_name (Optional[str]) – The name of the instance. Default: ‘BastionHost’
instance_type (Optional[InstanceType]) – Type of instance to launch. Default: ‘t3.nano’
machine_image (Optional[IMachineImage]) – The machine image to use, assumed to have SSM Agent preinstalled. Default: - An Amazon Linux 2 image which is kept up-to-date automatically (the instance may be replaced on every deployment) and already has SSM Agent installed.
require_imdsv2 (Optional[bool]) – Whether IMDSv2 should be required on this instance. Default: - false
security_group (Optional[ISecurityGroup]) – Security Group to assign to this instance. Default: - create new security group with no inbound and all outbound traffic allowed
subnet_selection (Union[SubnetSelection, Dict[str, Any], None]) – Select the subnets to run the bastion host in. Set this to PUBLIC if you need to connect to this instance via the internet and cannot use SSM. You have to allow port 22 manually by using the connections field Default: - private subnets of the supplied VPC
user_data_causes_replacement (Optional[bool]) – Determines whether changes to the UserData will force instance replacement. Depending on the EC2 instance type, modifying the UserData may either restart or replace the instance: - Instance store-backed instances are replaced. - EBS-backed instances are restarted. Note that by default, restarting does not execute the updated UserData, so an alternative mechanism is needed to ensure the instance re-executes the UserData. When set to true, the instance’s Logical ID will depend on the UserData, causing CloudFormation to replace the instance if the UserData changes. Default: - true if initOptions is specified, otherwise false.

Methods

allow_ssh_access_from(*peer)

Allow SSH access from the given peer or peers.

Necessary if you want to connect to the instance using ssh. If not called, you should use SSM Session Manager to connect to the instance.

Parameters:

peer (IPeer) –

Return type:

None

apply_removal_policy(policy)

Apply the given removal policy to this resource.

The Removal Policy controls what happens to this resource when it stops being managed by CloudFormation, either because you’ve removed it from the CDK application or because you’ve made a change that requires the resource to be replaced.

The resource can be deleted (RemovalPolicy.DESTROY), or left in your AWS account for data recovery and cleanup later (RemovalPolicy.RETAIN).

Parameters:

policy (RemovalPolicy) –

Return type:

None

to_string()

Returns a string representation of this construct.

Return type:: str

Attributes

connections: Allows specify security group connections for the instance.

env

The environment this resource belongs to.

For resources that are created and managed by the CDK (generally, those created by creating new class instances like Role, Bucket, etc.), this is always the same as the environment of the stack they belong to; however, for imported resources (those obtained from static methods like fromRoleArn, fromBucketName, etc.), that might be different than the stack they were imported into.

grant_principal: The principal to grant permissions to.

instance: The underlying instance resource.

instance_availability_zone

The availability zone the instance was launched in.

Attribute:: true

instance_id

The instance’s ID.

Attribute:: true

instance_private_dns_name

Private DNS name for this instance.

Attribute:: true

instance_private_ip

Private IP for this instance.

Attribute:: true

instance_public_dns_name

Publicly-routable DNS name for this instance.

(May be an empty string if the instance does not have a public name).

Attribute:: true

instance_public_ip

Publicly-routable IP address for this instance.

(May be an empty string if the instance does not have a public IP).

Attribute:: true

node: The tree node.

role: The IAM role assumed by the instance.

stack: The stack in which this resource is defined.

Static Methods

classmethod is_construct(x)

Checks if x is a construct.

Use this method instead of instanceof to properly detect Construct instances, even when the construct library is symlinked.

Explanation: in JavaScript, multiple copies of the constructs library on disk are seen as independent, completely different libraries. As a consequence, the class Construct in each copy of the constructs library is seen as a different class, and an instance of one class will not test as instanceof the other class. npm install will not create installations like this, but users may manually symlink construct libraries together or use a monorepo tool: in those cases, multiple copies of the constructs library can be accidentally installed, and instanceof will behave unpredictably. It is safest to avoid using instanceof, and using this type-testing method instead.

Parameters:: x (Any) – Any object.
Return type:: bool
Returns:: true if x is an object created from a class which extends Construct.

classmethod is_owned_resource(construct)

Returns true if the construct was created by CDK, and false otherwise.

Parameters:

construct (IConstruct) –

Return type:

bool

classmethod is_resource(construct)

Check whether the given construct is a Resource.

Parameters:

construct (IConstruct) –

Return type:

bool