Containerized application system graph driver
A custom file system in a containerized software architecture facilitates the instantiation of application containers. Each container is composed of one or more application image layers. An application container instance includes read-only application image layer data shared among application container instances associated with the same application container. An application container instance may also include read/write application container instance data that is specific to the application container instance.
1. A system comprising:
a memory; and
at least one processor configured to:
instantiate a first application container based on a plurality of application image layers, the first application container having read-only access to the plurality of application image layers; and
instantiate a second application container based, at least in part, on the plurality of application image layers;
wherein a private page cache stores storage information for the plurality of application image layers and is used by a graph driver to provide shared access to the plurality of application image layers by the first application container and the second application container.
2. The system of claim 1 , further comprising a network interface configured to enable communications over a network.
3. The system of claim 1 , wherein the at least one processor is further configured to store the plurality of application image layers.
4. The system of claim 1 , wherein the plurality of application image layers comprises a stack of layers representing an application image.
5. The system of claim 1 , wherein the second application container has a different hardware configuration than the first application container.
6. The system of claim 1 further comprising a database configured to store and maintain information associated with the plurality of application layers.
7. The system of claim 6 , wherein the database is configured to store a name, a checksum, time information, and an application identifier for each image layer of the plurality of application image layers.
8. The system of claim 1 , wherein the at least one processor is further configured to store a second plurality of application image layers associated with a second application.
9. The system of claim 8 , wherein the at least one processor is further configured to instantiate a third application container based on the second plurality of application image layers.
10. The system of claim 1 , wherein the first application container is a privileged storage container application.
11. The system of claim 1 , wherein the memory and the at least one processor are included in a storage container node.
12. A method comprising:
instantiating, using at least one processor, a first application container based on a plurality of application image layers, the first application container having read-only access to the plurality of application image layers; and
instantiating a second application container based, at least in part, on the plurality of application image layers;
wherein a private page cache stores storage information for the plurality of application image layers and is used by a graph driver to provide shared access to the plurality of application image layers by the first application container and the second application container.
13. The method of claim 12 , further comprising:
identifying the plurality of application image layers, the plurality of application image layers being a stack of layers representing an application image.
14. The method of claim 13 further comprising:
identifying a second plurality of application image layers associated with a second application.
15. The method of claim 14 further comprising:
instantiating a third application container based on the second plurality of application image layers.
16. The method of claim 12 , wherein the first application container is a privileged storage container application.
17. One or more non-transitory computer readable media having instructions stored thereon for performing a method, the method comprising:
instantiating, using at least one processor, a first application container based on a plurality of application image layers, the first application container having read-only access to the plurality of application image layers; and
instantiating a second application container based, at least in part, on the plurality of application image layers;
wherein a private page cache stores storage information for the plurality of application image layers and is used by a graph driver to provide shared access to the plurality of application image layers by the first application container and the second application container.
18. The one or more non-transitory computer readable media recited in claim 17 , wherein the method further comprises:
identifying the plurality of application image layers, the plurality of application image layers being a stack of layers representing an application image.
19. The one or more non-transitory computer readable media recited in claim 17 , wherein the method further comprises:
identifying a second plurality of application image layers associated with a second application.
20. The one or more non-transitory computer readable media recited in claim 19 , wherein the method further comprises:
instantiating a third application container based on the second plurality of application image layers.