Deployment of container images with separate add-ons
A container image is deployed, at runtime, on a node within a computing environment. The deploying includes downloading, at runtime, container image content from multiple sites. The downloading includes obtaining a core image of the container image from one or more image registries and updating a local image store with the core image, and obtaining one or more add-ons of the container image from one or more add-on registries and updating a local add-on store with the one or more add-ons. The deployed container image is executed on the node.
1. A computer-implemented method of facilitating processing within a computing environment, the computer-implemented method comprising:
deploying, at runtime, a container image on a node within the computing environment, the deploying comprising downloading, at runtime, container image content from multiple sites, the downloading comprising:
obtaining a core image of the container image from one or more image registries and updating a local image store with the core image; and
obtaining one or more add-ons of the container image from one or more add-on registries and updating a local add-on store with the one or more add-ons, wherein the container image is managed by a container runtime, the container runtime communicating with an agent on the node using a container runtime interface, the container runtime interface including a definition of an image message type that includes an add-on field to specify the one or more add-ons; and
executing the container image on the node.
2. The computer-implemented method of claim 1 , wherein the one or more add-ons are chosen from a plurality of add-ons that support a plurality of media types.
3. The computer-implemented method of claim 1 , wherein the executing the container image includes using a pod specification that specifies how to execute the container image, the pod specification including an optional add-on field, the optional add-on field to specify the one or more add-ons.
4. The computer-implemented method of claim 1 , wherein the one or more add-ons comprise one or more dynamically loaded components from the one or more add-on registries.
5. The computer-implemented method of claim 1 , wherein the core image comprises a data package following an image format specification loaded from at least one image registry of the one or more image registries.
6. The computer-implemented method of claim 1 , further comprising providing a security context for at least one add-on of the one or more add-ons.
7. The computer-implemented method of claim 6 , wherein the security context comprises indicating that the at least one add-on is read-only.
8. The computer-implemented method of claim 1 , wherein the deploying the container image comprises deploying the container image wherein a placing of redundant data in a local store is avoided.
9. The computer-implemented method of claim 1 , wherein an add-on registry of the one or more add-on registries includes storage for at least one add-on of the one or more add-ons and information relating to the at least one add-on.
10. A computer system for facilitating processing within a computing environment, the computer system comprising:
a memory; and
a node in communication with the memory, wherein the computer system is configured to perform a method, said method comprising:
deploying, at runtime, a container image on the node, the deploying comprising downloading, at runtime, container image content from multiple sites, the downloading comprising:
obtaining a core image of the container image from one or more image registries and updating a local image store with the core image; and
obtaining one or more add-ons of the container image from one or more add-on registries and updating a local add-on store with the one or more add-ons, wherein the container image is managed by a container runtime, the container runtime communicating with an agent on the node using a container runtime interface, the container runtime interface including a definition of an image message type that includes an add-on field to specify the one or more add-ons; and
executing the container image on the node.
11. The computer system of claim 10 , wherein the one or more add-ons are chosen from a plurality of add-ons that support a plurality of media types.
12. The computer system of claim 10 , further comprising providing a security context for at least one add-on of the one or more add-ons.
13. The computer system of claim 10 , wherein the executing the container image includes using a pod specification that specifies how to execute the container image, the pod specification including an optional add-on field, the optional add-on field to specify the one or more add-ons.
14. The computer system of claim 10 , wherein an add-on registry of the one or more add-on registries includes storage for at least one add-on of the one or more add-ons and information relating to the at least one add-on.
15. A computer program product for facilitating processing within a computing environment, the computer program product comprising:
one or more computer readable storage media and program instructions collectively stored on the one or more computer readable storage media to perform a method comprising:
deploying, at runtime, a container image on a node within the computing environment, the deploying comprising downloading, at runtime, container image content from multiple sites, the downloading comprising:
obtaining a core image of the container image from one or more image registries and updating a local image store with the core image; and
obtaining one or more add-ons of the container image from one or more add-on registries and updating a local add-on store with the one or more add-ons, wherein the container image is managed by a container runtime, the container runtime communicating with an agent on the node using a container runtime interface, the container runtime interface including a definition of an image message type that includes an add-on field to specify the one or more add-ons; and
executing the container image on the node.
16. The computer program product of claim 15 , wherein the one or more add-ons are chosen from a plurality of add-ons that support a plurality of media types.
17. The computer program product of claim 15 , further comprising providing a security context for at least one add-on of the one or more add-ons.
18. The computer program product of claim 15 , wherein the executing the container image includes using a pod specification that specifies how to execute the container image, the pod specification including an optional add-on field, the optional add-on field to specify the one or more add-ons.
19. The computer program product of claim 15 , wherein an add-on registry of the one or more add-on registries includes storage for at least one add-on of the one or more add-ons and information relating to the at least one add-on.
20. The computer program product of claim 15 , wherein the one or more add-ons comprise one or more dynamically loaded components from the one or more add-on registries.