node-drain/examples/plugin/example-plugin.go at main · SlyngDK/node-drain · GitHub

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package main

import (
	"context"

	"github.com/hashicorp/go-hclog"
	"github.com/slyngdk/node-drain/api/plugins"
	pluginv1 "github.com/slyngdk/node-drain/api/plugins/proto/v1"
)

type ExampleDrainPlugin struct {
	logger hclog.Logger
}

func (e *ExampleDrainPlugin) PluginInfo(_ context.Context) (plugins.DrainPluginInfo, error) {
	return plugins.DrainPluginInfo{
		ID:           "example-plugin",
		ConfigFormat: pluginv1.ConfigFormat_CONFIG_FORMAT_YAML,
	}, nil
}

func (e *ExampleDrainPlugin) Init(
	ctx context.Context,
	logger hclog.Logger,
	settings plugins.DrainPluginSettings) error {
	e.logger = logger
	e.logger.Debug("Init()")
	return nil
}

func (e *ExampleDrainPlugin) IsSupported(ctx context.Context) (bool, error) {
	e.logger.Debug("IsSupported()")
	return true, nil
}

func (e *ExampleDrainPlugin) IsHealthy(ctx context.Context) (bool, error) {
	e.logger.Debug("IsHealthy()")
	return true, nil
}

func (e *ExampleDrainPlugin) IsDrainOk(ctx context.Context, nodeName string) (bool, error) {
	e.logger.Debug("IsDrainOk()")
	return true, nil
}

func (e *ExampleDrainPlugin) PreDrain(ctx context.Context, nodeName string) error {
	e.logger.Debug("PreDrain()")
	return nil
}

func (e *ExampleDrainPlugin) PostDrain(ctx context.Context, nodeName string) error {
	e.logger.Debug("PostDrain()")
	return nil
}

func main() {
	plugins.Serve(&ExampleDrainPlugin{})
}