US 11,900,152 B1Granted

Controlled automatic updates to disk image layers with compatibility verification

AssigneeAmazon Technologies, Inc.

InventorsMarc Brooker, David Nasi, Trishika Pattabiraman, Holly Mesrobian, Mikhail Danilov, Peter Barry, Peter Martin McDonnell

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Abstract

Systems and methods are described for providing updating of disk images supporting serverless code execution and controlled deployment of updated disk images. A disk image can be defined as a set of layers that represent a file system include code of a serverless function and other data used by the code. A function owner can designate one layer as containing software or other data subject to update. When a new version of the layer is obtained at a serverless compute system, the system can generate a new disk image containing the updated layer. The system can then gradually transition the function to the new disk image, by dividing calls to the function among two versions of the function—one using the prior disk image, and one using the new disk image. Performance data gained from the new version of the function can be used to control the gradual transition.

Claims20

Dependent claims

A serverless code execution system comprising:

one or more data stores including i) information defining a first version of a serverless function, wherein the information identifies a layered disk image supporting execution of the first version of the serverless function, and ii) the layered disk image, wherein the layered disk image defines a file system, the layered disk image comprising a set of layers, each layer including a portion of data of the file system, wherein a first layer of the set of layers includes executable code corresponding to the first version of the serverless function and a second layer of the set of layers includes data depended on by the executable code;
one or more first computing devices configured to respond to calls to invoke the serverless function by invoking the first version of the serverless function, wherein invoking the first version of the serverless function includes provisioning one or more first execution environments with access to the file system defined within the layered disk image and executing the executable code within the one or more first execution environments;
and
one or more second computing devices implementing an update service configured to:
obtain a new layer corresponding to an updated version of the data within the second layer;
generate an updated disk image corresponding to a modification of the layered disk image to replace the second layer with the new layer;
generate a second version of the serverless function whose execution is supported by the updated disk image, wherein invoking the second version of the serverless function includes provisioning one or more second execution environments with access to a file system defined within the updated disk image and executing the executable code within the one or more second execution environments;
modify the one or more first computing devices to respond to the calls to invoke the serverless function by causing a first portion of the calls to invoke the first version of the serverless function and a second portion of the calls to invoke the second version of the serverless function;
monitor invocations of the second version of the serverless function to obtain performance data regarding the second version of the serverless function;
and
modifying a relative proportion of the first and second portions based on the performance data, wherein modifying the relative proportion includes increasing the relative proportion when the performance data indicates a lack of errors.

8 more elements

A computer-implemented method comprising:

obtaining a new layer corresponding to an updated version of data within a first layer of a layered disk image, wherein the layered disk image defines a file system, wherein the first layer includes data depended on by executable code included within a second layer of the layered disk image, wherein the layered disk image supports execution of a first version of a serverless function on a serverless compute system;
generating an updated disk image corresponding to a modification of the layered disk image to replace the first layer with the new layer;
generating a second version of the serverless function whose execution is supported by the updated disk image;
modifying operation of the serverless compute system to respond to calls to invoke the serverless function by causing a first portion of the calls to invoke the first version of the serverless function and a second portion of the calls to invoke the second version of the serverless function, wherein invoking the first version of the serverless function includes provisioning one or more first execution environments with access to the file system defined within the layered disk image and executing the executable code within the one or more first execution environments, and wherein invoking the second version of the serverless function includes provisioning one or more second execution environments with access to a file system defined within the updated disk image and executing the executable code within the one or more second execution environments;
monitoring invocations of the second version of the serverless function to obtain performance data regarding the second version of the serverless function;
and
modifying a relative proportion of the first and second portions based on the performance data.

4 more elements

One or more non-transitory computer-readable media comprising computer-executable instructions that, when executed on a serverless compute system, cause the serverless compute system to:

obtain a new layer corresponding to an updated version of data within a first layer of a layered disk image, wherein the layered disk image defines a file system, wherein the layered disk image comprises the first layer and a second layer, the second layer including code executable to implement a serverless function, and where the layered disk image is associated with a first version of the serverless function on the serverless compute system;
generate an updated disk image corresponding to a modification of the layered disk image to replace the first layer with the new layer;
generate a second version of the serverless function associated with the updated disk image;
modify operation of the serverless compute system to respond to calls to invoke the serverless function by causing a first portion of the calls to invoke the first version of the serverless function and a second portion of the calls to invoke the second version of the serverless function, wherein invoking the first version of the serverless function includes provisioning one or more first execution environments with access to the file system defined within the layered disk image and executing the executable code within the one or more first execution environments, and wherein invoking the second version of the serverless function includes provisioning one or more second execution environments with access to a file system defined within the updated disk image and executing the executable code within the one or more second execution environments;
monitor invocations of the second version of the serverless function to obtain performance data regarding the second version of the serverless function;
and
modify a relative proportion of the first and second portions based on the performance data.

4 more elements

Dependencies are inferred from the claim text.