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Merge pull request kubernetes-sigs#64 from codefromthecrypt/config
Add guest config and update NodeNumber plugin to use it
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package api | ||
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// Host is the WebAssembly host side of the scheduler. Specifically, this | ||
// scheduler framework.Plugin written in Go, which runs the Plugin this SDK | ||
// compiles to Wasm. | ||
type Host interface { | ||
// GetConfig reads any configuration set by the host. | ||
// | ||
// Note: This is not updated dynamically. | ||
GetConfig() []byte | ||
// ^-- Note: This is a []byte, not a string, for json.Unmarshaler. | ||
} |
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/* | ||
Copyright 2023 The Kubernetes Authors. | ||
Licensed under the Apache License, Version 2.0 (the "License"); | ||
you may not use this file except in compliance with the License. | ||
You may obtain a copy of the License at | ||
http://www.apache.org/licenses/LICENSE-2.0 | ||
Unless required by applicable law or agreed to in writing, software | ||
distributed under the License is distributed on an "AS IS" BASIS, | ||
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
See the License for the specific language governing permissions and | ||
limitations under the License. | ||
*/ | ||
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// Package host imports an api.Host from the WebAssembly host. | ||
package host | ||
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import ( | ||
"sigs.k8s.io/kube-scheduler-wasm-extension/guest/api" | ||
"sigs.k8s.io/kube-scheduler-wasm-extension/guest/internal/mem" | ||
) | ||
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// Get can be called at any time, to use features exported by the host. | ||
// | ||
// For example: | ||
// | ||
// func main() { | ||
// config := host.Get().GetConfig() | ||
// // decode yaml | ||
// } | ||
func Get() api.Host { | ||
return currentHost | ||
} | ||
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var currentHost api.Host = &host{} | ||
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type host struct { | ||
config []byte | ||
} | ||
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func (n *host) GetConfig() []byte { | ||
return n.lazyConfig() | ||
} | ||
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func (n *host) lazyConfig() []byte { | ||
if config := n.config; config != nil { | ||
return config | ||
} | ||
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// Wrap to avoid TinyGo 0.28: cannot use an exported function as value | ||
n.config = mem.GetBytes(func(ptr uint32, limit mem.BufLimit) (len uint32) { | ||
return getConfig(ptr, limit) | ||
}) | ||
return n.config | ||
} |
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//go:build tinygo.wasm | ||
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/* | ||
Copyright 2023 The Kubernetes Authors. | ||
Licensed under the Apache License, Version 2.0 (the "License"); | ||
you may not use this file except in compliance with the License. | ||
You may obtain a copy of the License at | ||
http://www.apache.org/licenses/LICENSE-2.0 | ||
Unless required by applicable law or agreed to in writing, software | ||
distributed under the License is distributed on an "AS IS" BASIS, | ||
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
See the License for the specific language governing permissions and | ||
limitations under the License. | ||
*/ | ||
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package host | ||
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import "sigs.k8s.io/kube-scheduler-wasm-extension/guest/internal/mem" | ||
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//go:wasmimport k8s.io/scheduler get_config | ||
func getConfig(ptr uint32, limit mem.BufLimit) (len uint32) |
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//go:build !tinygo.wasm | ||
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/* | ||
Copyright 2023 The Kubernetes Authors. | ||
Licensed under the Apache License, Version 2.0 (the "License"); | ||
you may not use this file except in compliance with the License. | ||
You may obtain a copy of the License at | ||
http://www.apache.org/licenses/LICENSE-2.0 | ||
Unless required by applicable law or agreed to in writing, software | ||
distributed under the License is distributed on an "AS IS" BASIS, | ||
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
See the License for the specific language governing permissions and | ||
limitations under the License. | ||
*/ | ||
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package host | ||
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import "sigs.k8s.io/kube-scheduler-wasm-extension/guest/internal/mem" | ||
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// getConfig is stubbed for compilation outside TinyGo. | ||
func getConfig(ptr uint32, limit mem.BufLimit) (len uint32) { return } |
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