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Driver plugin framework to facilitate development of driver plugins.
Implementing plugins only need to implement the DriverPlugin interface.
The framework proxies this interface to the go-plugin GRPC interface generated
from the driver.proto spec.
A testing harness is provided to allow implementing drivers to test the full
lifecycle of the driver plugin. An example use:
func TestMyDriver(t *testing.T) {
harness := NewDriverHarness(t, &MyDiverPlugin{})
// The harness implements the DriverPlugin interface and can be used as such
taskHandle, err := harness.StartTask(...)
}
42 lines
1021 B
Go
42 lines
1021 B
Go
package drivers
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import (
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"context"
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hclog "github.com/hashicorp/go-hclog"
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plugin "github.com/hashicorp/go-plugin"
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"github.com/hashicorp/nomad/plugins/drivers/proto"
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"google.golang.org/grpc"
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)
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// PluginDriver wraps a DriverPlugin and implements go-plugins GRPCPlugin
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// interface to expose the the interface over gRPC
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type PluginDriver struct {
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plugin.NetRPCUnsupportedPlugin
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impl DriverPlugin
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logger hclog.Logger
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}
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func NewDriverPlugin(d DriverPlugin, logger hclog.Logger) plugin.GRPCPlugin {
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return &PluginDriver{
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impl: d,
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logger: logger.Named("driver_plugin"),
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}
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}
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func (p *PluginDriver) GRPCServer(broker *plugin.GRPCBroker, s *grpc.Server) error {
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proto.RegisterDriverServer(s, &driverPluginServer{
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impl: p.impl,
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broker: broker,
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logger: p.logger,
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})
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return nil
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}
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func (p *PluginDriver) GRPCClient(ctx context.Context, broker *plugin.GRPCBroker, c *grpc.ClientConn) (interface{}, error) {
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return &driverPluginClient{
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client: proto.NewDriverClient(c),
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logger: p.logger,
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}, nil
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}
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