Methods and systems for instantiating and transparently migrating executing containerized processes
A method for instantiating and transparently migrating executing containerized processes includes receiving, by a container engine executing on a first machine, an instruction to instantiate a container image on the first machine, the container image including at least one process without including an operating system kernel. The container engine transmits, to a modified container runtime process, the instruction to instantiate the container image on the first machine. The modified container runtime process generates, on the first machine, a shim process representing the instantiated container image. The shim process forwards the instruction to an agent on a second machine. The agent directs instantiation of the container image, which includes providing, to the containerized process, at least one instruction for communicating with an operating system kernel of the second machine. A scheduler component on the first machine determines to migrate the containerized process to a third machine and directs the migration.
1 . A method for instantiating and transparently migrating executing containerized processes, the method comprising:
receiving, by a container engine executing on a first machine, an instruction to instantiate a container image on the first machine, the container image including at least one process without including an operating system kernel;
transmitting, by the container engine, to a modified container runtime process, executing on the first machine, the instruction to instantiate the container image on the first machine;
generating, by the modified container runtime process, on the first machine, a shim process representing the instantiated container image;
forwarding, by the shim process, the instruction, to an agent executing on a second machine, via a proxy connected to the agent via a network connection;
directing, by the agent, instantiation of the container image as a containerized process, wherein directing instantiation includes providing to the containerized process at least one instruction for communicating with an operating system kernel of the second machine;
determining, by a scheduler component executing on the first machine, to migrate the containerized process to a third machine; and
directing, by the scheduler component, migration of the containerized process to the third machine, during execution of the containerized process.
2 . The method of claim 1 , wherein receiving, by the container engine, the instruction to instantiate the container image on the first machine further comprises receiving, by the container engine, from a container orchestration engine executing on the first machine, the instruction to instantiate the container image on the first machine.
3 . The method of claim 1 , further comprising determining, by the scheduler component, that the third machine provides functionality for hosting the containerized process at a level of efficiency that is higher than a level of efficiency provided by the second machine.
4 . The method of claim 1 , further comprising determining, by the scheduler component, that the third machine provides functionality for hosting the containerized process at a level of optimization that is higher than a level of optimization provided by the second machine.
5 . A system for instantiating and transparently migrating executing containerized processes comprising:
a container engine executing on a first machine and receiving an instruction to instantiate a container image on the first machine, the container image including at least one process without including an operating system kernel;
a modified container runtime process executing on the first machine and receiving, from the container engine, the instruction to instantiate the container image on the first machine;
a shim process (i) representing the instantiated container image, (ii) generated on the first machine by the modified container runtime responsive to receiving, by the modified container runtime process, the instruction to instantiate the container image on the first machine, and (iii) executing a proxy;
an agent (i) executing on a second machine, (ii) connected to the proxy on the first machine via a network connection, (iii) receiving, from the shim process via the proxy, an instruction to instantiate the container image on the second machine, and (iv) directing instantiation of the container image as a containerized process, wherein directing instantiation includes providing to the containerized process at least one instruction for communicating with an operating system kernel of the second machine; and
a scheduler component executing on the first machine, determining to migrate the containerized process to a third machine, and directing migration of the containerized process to the third machine, during execution of the containerized process.
6 . The system of claim 5 , wherein the first machine is a physical computing device.
7 . The system of claim 5 , wherein the first machine is a virtual computing device.
8 . The system of claim 5 , wherein the second machine is a physical computing device.
9 . The system of claim 5 , wherein the second machine is a virtual computing device.
10 . The system of claim 5 , wherein the system further comprises a container orchestration engine.
11 . The system of claim 10 , wherein the container engine further comprises functionality for receiving, from the container orchestration engine, the instruction to instantiate a container image on the first machine.
12 . The system of claim 5 , wherein the container engine further comprises functionality for receiving an instruction to execute the modified container runtime process.
13 . The system of claim 5 , wherein the scheduler component determines that the third machine provides functionality for hosting the containerized process at a level of efficiency that is higher than a level of efficiency provided by the second machine.
14 . The system of claim 5 , wherein the scheduler component determines that the third machine provides functionality for hosting the containerized process at a level of optimization that is higher than a level of optimization provided by the second machine.