K8s-less mode and helpers #1164
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Adds a small crate with a procedural macro to derive trait "Sample". The trait is meant to allow building sample json/yaml files for the main gateay CRD. Trait "Sample" is introduced later, outside of this crate. Signed-off-by: Fredi Raspall <fredi@githedgehog.com>
Signed-off-by: Fredi Raspall <fredi@githedgehog.com>
Add a vanilla implementation of the Sample trait for the primitive / basic types that the generated rust types for the CRDs depend on. Signed-off-by: Fredi Raspall <fredi@githedgehog.com>
Modify build.rs to derive trait Sample for the autogenerated types to represent CRDs, recursively. By automatically deriving Sample, we make sure that samples will be aligned when the CRD definitions change. Signed-off-by: Fredi Raspall <fredi@githedgehog.com>
The function will be used to create sample json and yaml files to be used as templates for manual testing. Signed-off-by: Fredi Raspall <fredi@githedgehog.com>
Signed-off-by: Fredi Raspall <fredi@githedgehog.com>
Adds crate k8s-sample-crds which, at build time, uses the utils in k8s-intf to generate json/yaml "samples" (templates) that are up-to-date with the CRD definitions in k8s-intf. Signed-off-by: Fredi Raspall <fredi@githedgehog.com>
Adds a new crate to support kubeless mode (k8s-less), where dataplane learns its configuration by monitoring changes in files inside a directory (using inotify) that contain the gateway spec in yaml or json. This mode of operation may be used only for testing or development. Therefore, we implement it outside of the k8s-intf crate. Files that change in (or get added to) the watched directory get read and their contents (yaml or json) deserialized into a crd spec. From that spec, a GatewayAgent object (representing the main CRD) is built and passed to a user-provided callback. This crate attempts to mimic k8s-intf and deals only with: - the watching of files in a directory using inotify - the deserialization of those files into the GatewayAgent type. It does not attempt to populate/build any of the configuration types in crate dataplane-config. Signed-off-by: Fredi Raspall <fredi@githedgehog.com>
Adds --config-dir cmd line option to specify the directory in k8s- less mode and augments the ConfigServerSection to include it. Signed-off-by: Fredi Raspall <fredi@githedgehog.com>
Add a k8s-less client that watches the config directory and uses the config client to request the config processor to apply a new config. Signed-off-by: Fredi Raspall <fredi@githedgehog.com>
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The goal of this PR is to make it easy to create k8s-like configurations and run dataplane without k8s infrastructure. This is convenient for early testing when developing new features.
This PR contains 4 parts:
k8s-sample-derivethat allows deriving a trait called Sample.k8s-sample-crdswhich creates sample files automatically.--config-dirDIRECTORY, where DIRECTORY is the directory to drop the configs to.