opendc.git - The OpenDC repository.

Age	Commit message (Collapse)	Author
2022-05-06	refactor(compute/service): Remove OpenTelemetry from "compute" modules	Fabian Mastenbroek
	This change removes the OpenTelemetry integration from the OpenDC Compute modules. Previously, we chose to integrate OpenTelemetry to provide a unified way to report metrics to the users. Although this worked as expected, the overhead of the OpenTelemetry when collecting metrics during simulation was considerable and lacked more optimization opportunities (other than providing a separate API implementation). Furthermore, since we were tied to OpenTelemetry's SDK implementation, we experienced issues with throttling and registering multiple instruments. We will instead use another approach, where we expose the core metrics in OpenDC via specialized interfaces (see the commits before) such that access is fast and can be done without having to interface with OpenTelemetry. In addition, we will provide an adapter to that is able to forward these metrics to OpenTelemetry implementations, so we can still integrate with the wider ecosystem.
2022-05-04	refactor(compute): Directly expose scheduler stats to user	Fabian Mastenbroek
	This change updates the `ComputeService` interface to directly expose statistics about the scheduler to the user, such that they do not necessarily have to interact with OpenTelemetry to obtain these values.
2022-05-04	feat(compute): Add support for looking up hosts	Fabian Mastenbroek
	This change adds the ability for users to lookup the `Host` on which a `Server` is hosted (if any). This allows the user to potentially interact with the `Host` directly, e.g., in order to obtain advanced metrics.
2022-05-03	refactor(compute): Expose CPU and system stats via Host interface	Fabian Mastenbroek
	This change updates the `Host` interface to directly expose CPU and system stats to be used by components that interface with the `Host` interface. Previously, this would require the user to interact with the OpenTelemetry SDK. Although that is still possible for more advanced usage cases, users can use the following methods to easily access common host and guest statistics.
2022-02-18	refactor(utils): Rename utils module to common module	Fabian Mastenbroek
	This change adds a new module, opendc-common, that contains functionality that is shared across OpenDC's modules. We move the existing utils module into this new module.
2022-02-18	feat(utils): Add Pacer to pace scheduling cycles	Fabian Mastenbroek
	This change adds a new Pacer class that can pace the incoming scheduling requests into scheduling cycles by allowing the user to specify a scheduling quantum.
2022-02-15	refactor: Update OpenTelemetry to version 1.11	Fabian Mastenbroek
	This change updates the OpenDC codebase to use OpenTelemetry v1.11, which stabilizes the metrics API. This stabilization brings quite a few breaking changes, so significant changes are necessary inside the OpenDC codebase.
2021-10-25	feat(telemetry): Report provisioning time of virtual machines	Fabian Mastenbroek
	This change adds support for collecting the provisioning time of virtual machines in addition to their boot time.
2021-10-25	feat(compute): Support filtering hosts based on CPU capacity	Fabian Mastenbroek
	This change allows users to create servers with a smaller CPU capacity than the host, by specifying the CPU capacity via metadata. This also allows filtering hosts based on their available CPU capacity.
2021-09-17	refactor(telemetry): Standardize compute scheduler metrics	Fabian Mastenbroek
	This change updates the OpenDC compute service implementation with multiple meters that follow the OpenTelemetry conventions.
2021-09-17	refactor(telemetry): Create separate MeterProvider per service/host	Fabian Mastenbroek
	This change refactors the telemetry implementation by creating a separate MeterProvider per service or host. This means we have to keep track of multiple metric producers, but that we can attach resource information to each of the MeterProviders like we would in a real world scenario.
2021-09-10	docs(compute): Clarify terminology in compute service	Fabian Mastenbroek

2021-09-07	fix(compute): Mark unschedulable server as terminated	Fabian Mastenbroek
	This change updates the compute service to mark servers that cannot be scheduled as terminated instead of error. Error is instead reserved for cases where the server is in an error state while running.
2021-09-07	feat(compute): Track provisioning response time	Fabian Mastenbroek
	This change adds a metric for the provisioning time of virtual machines by the compute service.
2021-08-25	build: Upgrade to OpenTelemetry 1.5	Fabian Mastenbroek
	This change upgrades the OpenTelemetry dependency to version 1.5, which contains various breaking changes in the metrics API.
2021-08-22	refactor(compute): Update FilterScheduler to follow OpenStack's Nova	Fabian Mastenbroek
	This change updates the FilterScheduler implementation to follow more closely the scheduler implementation in OpenStack's Nova. We now normalize the weights, support many of the filters and weights in OpenStack and support overcommitting resources.
2021-08-22	fix(compute): Track failed servers with counters correctly	Fabian Mastenbroek

2021-08-13	build: Update Kotlin dependencies	Fabian Mastenbroek
	This change updates the Kotlin dependencies used by OpenDC to their latest version.
2021-05-18	chore: Address deprecations due to Kotlin 1.5	Fabian Mastenbroek
	This change addresses the deprecations that were caused by the migration to Kotlin 1.5.
2021-04-25	build: Migrate to flat project structure	Fabian Mastenbroek
	This change updates the project structure to become flattened. Previously, the simulator, frontend and API each lived into their own directory. With this change, all modules of the project live in the top-level directory of the repository. This should improve discoverability of modules of the project.