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package plugin
import (
"context"
"errors"
"io"
"log"
"sync"
plugin "github.com/hashicorp/go-plugin"
"github.com/hashicorp/terraform/configs/configschema"
proto "github.com/hashicorp/terraform/internal/tfplugin5"
"github.com/hashicorp/terraform/plugin/convert"
"github.com/hashicorp/terraform/provisioners"
"github.com/zclconf/go-cty/cty"
"github.com/zclconf/go-cty/cty/msgpack"
"google.golang.org/grpc"
)
// GRPCProvisionerPlugin is the plugin.GRPCPlugin implementation.
type GRPCProvisionerPlugin struct {
plugin.Plugin
GRPCProvisioner func() proto.ProvisionerServer
}
func (p *GRPCProvisionerPlugin) GRPCClient(ctx context.Context, broker *plugin.GRPCBroker, c *grpc.ClientConn) (interface{}, error) {
return &GRPCProvisioner{
client: proto.NewProvisionerClient(c),
ctx: ctx,
}, nil
}
func (p *GRPCProvisionerPlugin) GRPCServer(broker *plugin.GRPCBroker, s *grpc.Server) error {
proto.RegisterProvisionerServer(s, p.GRPCProvisioner())
return nil
}
// provisioners.Interface grpc implementation
type GRPCProvisioner struct {
// PluginClient provides a reference to the plugin.Client which controls the plugin process.
// This allows the GRPCProvider a way to shutdown the plugin process.
PluginClient *plugin.Client
client proto.ProvisionerClient
ctx context.Context
// Cache the schema since we need it for serialization in each method call.
mu sync.Mutex
schema *configschema.Block
}
func (p *GRPCProvisioner) GetSchema() (resp provisioners.GetSchemaResponse) {
p.mu.Lock()
defer p.mu.Unlock()
if p.schema != nil {
return provisioners.GetSchemaResponse{
Provisioner: p.schema,
}
}
protoResp, err := p.client.GetSchema(p.ctx, new(proto.GetProvisionerSchema_Request))
if err != nil {
resp.Diagnostics = resp.Diagnostics.Append(err)
return resp
}
resp.Diagnostics = resp.Diagnostics.Append(convert.ProtoToDiagnostics(protoResp.Diagnostics))
if protoResp.Provisioner == nil {
resp.Diagnostics = resp.Diagnostics.Append(errors.New("missing provisioner schema"))
return resp
}
resp.Provisioner = convert.ProtoToConfigSchema(protoResp.Provisioner.Block)
p.schema = resp.Provisioner
return resp
}
func (p *GRPCProvisioner) ValidateProvisionerConfig(r provisioners.ValidateProvisionerConfigRequest) (resp provisioners.ValidateProvisionerConfigResponse) {
schema := p.GetSchema()
if schema.Diagnostics.HasErrors() {
resp.Diagnostics = resp.Diagnostics.Append(schema.Diagnostics)
return resp
}
mp, err := msgpack.Marshal(r.Config, schema.Provisioner.ImpliedType())
if err != nil {
resp.Diagnostics = resp.Diagnostics.Append(err)
return resp
}
protoReq := &proto.ValidateProvisionerConfig_Request{
Config: &proto.DynamicValue{Msgpack: mp},
}
protoResp, err := p.client.ValidateProvisionerConfig(p.ctx, protoReq)
if err != nil {
resp.Diagnostics = resp.Diagnostics.Append(err)
return resp
}
resp.Diagnostics = resp.Diagnostics.Append(convert.ProtoToDiagnostics(protoResp.Diagnostics))
return resp
}
func (p *GRPCProvisioner) ProvisionResource(r provisioners.ProvisionResourceRequest) (resp provisioners.ProvisionResourceResponse) {
schema := p.GetSchema()
if schema.Diagnostics.HasErrors() {
resp.Diagnostics = resp.Diagnostics.Append(schema.Diagnostics)
return resp
}
mp, err := msgpack.Marshal(r.Config, schema.Provisioner.ImpliedType())
if err != nil {
resp.Diagnostics = resp.Diagnostics.Append(err)
return resp
}
// connection is always assumed to be a simple string map
connMP, err := msgpack.Marshal(r.Connection, cty.Map(cty.String))
if err != nil {
resp.Diagnostics = resp.Diagnostics.Append(err)
return resp
}
protoReq := &proto.ProvisionResource_Request{
Config: &proto.DynamicValue{Msgpack: mp},
Connection: &proto.DynamicValue{Msgpack: connMP},
}
outputClient, err := p.client.ProvisionResource(p.ctx, protoReq)
if err != nil {
resp.Diagnostics = resp.Diagnostics.Append(err)
return resp
}
for {
rcv, err := outputClient.Recv()
if rcv != nil {
r.UIOutput.Output(rcv.Output)
}
if err != nil {
if err != io.EOF {
resp.Diagnostics = resp.Diagnostics.Append(err)
}
break
}
if len(rcv.Diagnostics) > 0 {
resp.Diagnostics = resp.Diagnostics.Append(convert.ProtoToDiagnostics(rcv.Diagnostics))
break
}
}
return resp
}
func (p *GRPCProvisioner) Stop() error {
protoResp, err := p.client.Stop(p.ctx, &proto.Stop_Request{})
if err != nil {
return err
}
if protoResp.Error != "" {
return errors.New(protoResp.Error)
}
return nil
}
func (p *GRPCProvisioner) Close() error {
// check this since it's not automatically inserted during plugin creation
if p.PluginClient == nil {
log.Println("[DEBUG] provider has no plugin.Client")
return nil
}
p.PluginClient.Kill()
return nil
}
|
