LinuxParameters

class aws_cdk.aws_ecs.LinuxParameters(scope, id, *, init_process_enabled=None, max_swap=None, shared_memory_size=None, swappiness=None)

Bases: Construct

Linux-specific options that are applied to the container.

ExampleMetadata:: infused

Example:

# task_definition: ecs.TaskDefinition


task_definition.add_container("container",
    image=ecs.ContainerImage.from_registry("amazon/amazon-ecs-sample"),
    memory_limit_mi_b=1024,
    linux_parameters=ecs.LinuxParameters(self, "LinuxParameters",
        init_process_enabled=True,
        shared_memory_size=1024,
        max_swap=Size.mebibytes(5000),
        swappiness=90
    )
)

Constructs a new instance of the LinuxParameters class.

Parameters:

scope (Construct) –
id (str) –
init_process_enabled (Optional[bool]) – Specifies whether to run an init process inside the container that forwards signals and reaps processes. Default: false
max_swap (Optional[Size]) – The total amount of swap memory a container can use. This parameter will be translated to the –memory-swap option to docker run. This parameter is only supported when you are using the EC2 launch type. Accepted values are positive integers. Default: No swap.
shared_memory_size (Union[int, float, None]) – The value for the size of the /dev/shm volume. Default: No shared memory.
swappiness (Union[int, float, None]) – This allows you to tune a container’s memory swappiness behavior. This parameter maps to the –memory-swappiness option to docker run. The swappiness relates to the kernel’s tendency to swap memory. A value of 0 will cause swapping to not happen unless absolutely necessary. A value of 100 will cause pages to be swapped very aggressively. This parameter is only supported when you are using the EC2 launch type. Accepted values are whole numbers between 0 and 100. If a value is not specified for maxSwap then this parameter is ignored. Default: 60

Methods

add_capabilities(*cap)

Adds one or more Linux capabilities to the Docker configuration of a container.

Tasks launched on Fargate only support adding the ‘SYS_PTRACE’ kernel capability.

Parameters:

cap (Capability) –

Return type:

None

add_devices(*device)

Adds one or more host devices to a container.

Parameters:

device (Device) –

Return type:

None

add_tmpfs(*tmpfs)

Specifies the container path, mount options, and size (in MiB) of the tmpfs mount for a container.

Only works with EC2 launch type.

Parameters:

tmpfs (Tmpfs) –

Return type:

None

drop_capabilities(*cap)

Removes one or more Linux capabilities to the Docker configuration of a container.

Parameters:

cap (Capability) –

Return type:

None

render_linux_parameters()

Renders the Linux parameters to a CloudFormation object.

Return type:: LinuxParametersProperty

to_string()

Returns a string representation of this construct.

Return type:: str

Attributes

node: The tree node.

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.