Distributed notebook kernels in a containerized computing environment

1. A method, comprising:

executing, using computer hardware, a notebook server in a first container, wherein the notebook server is configured to communicate with a gateway in a second container;

in response to a request for a kernel from the notebook server, the gateway requesting, using the computer hardware, a new container including the kernel from a container manager;

instantiating, using the computer hardware, the new container including the kernel within a selected computing node of a plurality of computing nodes;

publishing, using the computer hardware, communication port information for the new container to the gateway;

exchanging electronic messages, using the computer hardware, between the notebook server and the kernel through the gateway using the communication port information for the new container;

wherein in response to receiving a lifecycle management message for the kernel from the notebook server, the gateway sending the lifecycle management message to a communication port of a kernel controller; and

the kernel controller, in response to the lifecycle management message, performing a signal write to a process within the new container executing the kernel.

2. The method of claim 1 , wherein the first container and the new container execute in different computing nodes of the plurality of computing nodes.

3. The method of claim 1 , further comprising:

choosing the selected computing node from the plurality of computing nodes to implement the new container.

4. The method of claim 1 , further comprising:

the gateway receiving a location indicating the selected computing node in which the new container is instantiated.

5. A system, comprising:

computer hardware, having at least one processor, configured to initiate operations including:

executing a notebook server in a first container, wherein the notebook server is configured to communicate with a gateway in a second container;

in response to a request for a kernel from the notebook server, the gateway requesting a new container including the kernel from a container manager;

instantiating the new container including the kernel within a selected computing node of a plurality of computing nodes;

publishing communication port information for the new container to the gateway;

exchanging electronic messages between the notebook server and the kernel through the gateway using the communication port information for the new container;

wherein in response to receiving a lifecycle management message for the kernel from the notebook server, the gateway sending the lifecycle management message to a communication port of a kernel controller; and

the kernel controller, in response to the lifecycle management message, performing a signal write to a process within the new container executing the kernel.

6. The system of claim 5 , wherein the first container and the new container execute in different computing nodes of the plurality of computing nodes.

7. The system of claim 5 , wherein the computer hardware is configured to initiate operations further comprising:

choosing the selected computing node from the plurality of computing nodes to implement the new container.

8. The system of claim 5 , wherein the computer hardware is configured to initiate operations further comprising:

the gateway receiving a location indicating the selected computing node in which the new container is instantiated.

9. A computer program product comprising a computer readable storage medium having program instructions embodied therewith, the program instructions executable by computer hardware to cause the computer hardware to initiate operations comprising:

executing a notebook server in a first container, wherein the notebook server is configured to communicate with a gateway in a second container;

in response to a request for a kernel from the notebook server, the gateway requesting a new container including the kernel from a container manager;

instantiating the new container including the kernel within a selected computing node of a plurality of computing nodes; publishing communication port information for the new container to the gateway;

exchanging electronic messages between the notebook server and the kernel through the gateway using the communication port information for the new container;

wherein in response to receiving a lifecycle management message for the kernel from the notebook server, the gateway sending the lifecycle management message to a communication port of a kernel controller; and

the kernel controller, in response to the lifecycle management message, performing a signal write to a process within the new container executing the kernel.

10. The computer program product of claim 9 , wherein:

the first container executes in a first computing node of the plurality of computing nodes; and

the second container executes in a second computing node of the plurality of computing nodes.

11. The computer program product of claim 9 , wherein the program instructions are executable by the computer hardware to cause the computer hardware to initiate operations further comprising:

choosing the selected computing node from the plurality of computing nodes to implement the second container.