open-consul/agent/consul/fsm/commands_oss.go

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package fsm
import (
"fmt"
"time"
"github.com/armon/go-metrics"
"github.com/hashicorp/consul/agent/structs"
"github.com/hashicorp/consul/api"
)
func init() {
registerCommand(structs.RegisterRequestType, (*FSM).applyRegister)
registerCommand(structs.DeregisterRequestType, (*FSM).applyDeregister)
registerCommand(structs.KVSRequestType, (*FSM).applyKVSOperation)
registerCommand(structs.SessionRequestType, (*FSM).applySessionOperation)
registerCommand(structs.ACLRequestType, (*FSM).applyACLOperation)
registerCommand(structs.TombstoneRequestType, (*FSM).applyTombstoneOperation)
registerCommand(structs.CoordinateBatchUpdateType, (*FSM).applyCoordinateBatchUpdate)
registerCommand(structs.PreparedQueryRequestType, (*FSM).applyPreparedQueryOperation)
registerCommand(structs.TxnRequestType, (*FSM).applyTxn)
registerCommand(structs.AutopilotRequestType, (*FSM).applyAutopilotUpdate)
}
func (c *FSM) applyRegister(buf []byte, index uint64) interface{} {
defer metrics.MeasureSince([]string{"consul", "fsm", "register"}, time.Now())
defer metrics.MeasureSince([]string{"fsm", "register"}, time.Now())
var req structs.RegisterRequest
if err := structs.Decode(buf, &req); err != nil {
panic(fmt.Errorf("failed to decode request: %v", err))
}
// Apply all updates in a single transaction
if err := c.state.EnsureRegistration(index, &req); err != nil {
c.logger.Printf("[WARN] consul.fsm: EnsureRegistration failed: %v", err)
return err
}
return nil
}
func (c *FSM) applyDeregister(buf []byte, index uint64) interface{} {
defer metrics.MeasureSince([]string{"consul", "fsm", "deregister"}, time.Now())
defer metrics.MeasureSince([]string{"fsm", "deregister"}, time.Now())
var req structs.DeregisterRequest
if err := structs.Decode(buf, &req); err != nil {
panic(fmt.Errorf("failed to decode request: %v", err))
}
// Either remove the service entry or the whole node. The precedence
// here is also baked into vetDeregisterWithACL() in acl.go, so if you
// make changes here, be sure to also adjust the code over there.
if req.ServiceID != "" {
if err := c.state.DeleteService(index, req.Node, req.ServiceID); err != nil {
c.logger.Printf("[WARN] consul.fsm: DeleteNodeService failed: %v", err)
return err
}
} else if req.CheckID != "" {
if err := c.state.DeleteCheck(index, req.Node, req.CheckID); err != nil {
c.logger.Printf("[WARN] consul.fsm: DeleteNodeCheck failed: %v", err)
return err
}
} else {
if err := c.state.DeleteNode(index, req.Node); err != nil {
c.logger.Printf("[WARN] consul.fsm: DeleteNode failed: %v", err)
return err
}
}
return nil
}
func (c *FSM) applyKVSOperation(buf []byte, index uint64) interface{} {
var req structs.KVSRequest
if err := structs.Decode(buf, &req); err != nil {
panic(fmt.Errorf("failed to decode request: %v", err))
}
defer metrics.MeasureSinceWithLabels([]string{"consul", "fsm", "kvs"}, time.Now(),
[]metrics.Label{{Name: "op", Value: string(req.Op)}})
defer metrics.MeasureSinceWithLabels([]string{"fsm", "kvs"}, time.Now(),
[]metrics.Label{{Name: "op", Value: string(req.Op)}})
switch req.Op {
case api.KVSet:
return c.state.KVSSet(index, &req.DirEnt)
case api.KVDelete:
return c.state.KVSDelete(index, req.DirEnt.Key)
case api.KVDeleteCAS:
act, err := c.state.KVSDeleteCAS(index, req.DirEnt.ModifyIndex, req.DirEnt.Key)
if err != nil {
return err
}
return act
case api.KVDeleteTree:
return c.state.KVSDeleteTree(index, req.DirEnt.Key)
case api.KVCAS:
act, err := c.state.KVSSetCAS(index, &req.DirEnt)
if err != nil {
return err
}
return act
case api.KVLock:
act, err := c.state.KVSLock(index, &req.DirEnt)
if err != nil {
return err
}
return act
case api.KVUnlock:
act, err := c.state.KVSUnlock(index, &req.DirEnt)
if err != nil {
return err
}
return act
default:
err := fmt.Errorf("Invalid KVS operation '%s'", req.Op)
c.logger.Printf("[WARN] consul.fsm: %v", err)
return err
}
}
func (c *FSM) applySessionOperation(buf []byte, index uint64) interface{} {
var req structs.SessionRequest
if err := structs.Decode(buf, &req); err != nil {
panic(fmt.Errorf("failed to decode request: %v", err))
}
defer metrics.MeasureSinceWithLabels([]string{"consul", "fsm", "session"}, time.Now(),
[]metrics.Label{{Name: "op", Value: string(req.Op)}})
defer metrics.MeasureSinceWithLabels([]string{"fsm", "session"}, time.Now(),
[]metrics.Label{{Name: "op", Value: string(req.Op)}})
switch req.Op {
case structs.SessionCreate:
if err := c.state.SessionCreate(index, &req.Session); err != nil {
return err
}
return req.Session.ID
case structs.SessionDestroy:
return c.state.SessionDestroy(index, req.Session.ID)
default:
c.logger.Printf("[WARN] consul.fsm: Invalid Session operation '%s'", req.Op)
return fmt.Errorf("Invalid Session operation '%s'", req.Op)
}
}
func (c *FSM) applyACLOperation(buf []byte, index uint64) interface{} {
var req structs.ACLRequest
if err := structs.Decode(buf, &req); err != nil {
panic(fmt.Errorf("failed to decode request: %v", err))
}
defer metrics.MeasureSinceWithLabels([]string{"consul", "fsm", "acl"}, time.Now(),
[]metrics.Label{{Name: "op", Value: string(req.Op)}})
defer metrics.MeasureSinceWithLabels([]string{"fsm", "acl"}, time.Now(),
[]metrics.Label{{Name: "op", Value: string(req.Op)}})
switch req.Op {
case structs.ACLBootstrapInit:
enabled, err := c.state.ACLBootstrapInit(index)
if err != nil {
return err
}
return enabled
case structs.ACLBootstrapNow:
if err := c.state.ACLBootstrap(index, &req.ACL); err != nil {
return err
}
return &req.ACL
case structs.ACLForceSet, structs.ACLSet:
if err := c.state.ACLSet(index, &req.ACL); err != nil {
return err
}
return req.ACL.ID
case structs.ACLDelete:
return c.state.ACLDelete(index, req.ACL.ID)
default:
c.logger.Printf("[WARN] consul.fsm: Invalid ACL operation '%s'", req.Op)
return fmt.Errorf("Invalid ACL operation '%s'", req.Op)
}
}
func (c *FSM) applyTombstoneOperation(buf []byte, index uint64) interface{} {
var req structs.TombstoneRequest
if err := structs.Decode(buf, &req); err != nil {
panic(fmt.Errorf("failed to decode request: %v", err))
}
defer metrics.MeasureSinceWithLabels([]string{"consul", "fsm", "tombstone"}, time.Now(),
[]metrics.Label{{Name: "op", Value: string(req.Op)}})
defer metrics.MeasureSinceWithLabels([]string{"fsm", "tombstone"}, time.Now(),
[]metrics.Label{{Name: "op", Value: string(req.Op)}})
switch req.Op {
case structs.TombstoneReap:
return c.state.ReapTombstones(req.ReapIndex)
default:
c.logger.Printf("[WARN] consul.fsm: Invalid Tombstone operation '%s'", req.Op)
return fmt.Errorf("Invalid Tombstone operation '%s'", req.Op)
}
}
// applyCoordinateBatchUpdate processes a batch of coordinate updates and applies
// them in a single underlying transaction. This interface isn't 1:1 with the outer
// update interface that the coordinate endpoint exposes, so we made it single
// purpose and avoided the opcode convention.
func (c *FSM) applyCoordinateBatchUpdate(buf []byte, index uint64) interface{} {
var updates structs.Coordinates
if err := structs.Decode(buf, &updates); err != nil {
panic(fmt.Errorf("failed to decode batch updates: %v", err))
}
defer metrics.MeasureSince([]string{"consul", "fsm", "coordinate", "batch-update"}, time.Now())
defer metrics.MeasureSince([]string{"fsm", "coordinate", "batch-update"}, time.Now())
if err := c.state.CoordinateBatchUpdate(index, updates); err != nil {
return err
}
return nil
}
// applyPreparedQueryOperation applies the given prepared query operation to the
// state store.
func (c *FSM) applyPreparedQueryOperation(buf []byte, index uint64) interface{} {
var req structs.PreparedQueryRequest
if err := structs.Decode(buf, &req); err != nil {
panic(fmt.Errorf("failed to decode request: %v", err))
}
defer metrics.MeasureSinceWithLabels([]string{"consul", "fsm", "prepared-query"}, time.Now(),
[]metrics.Label{{Name: "op", Value: string(req.Op)}})
defer metrics.MeasureSinceWithLabels([]string{"fsm", "prepared-query"}, time.Now(),
[]metrics.Label{{Name: "op", Value: string(req.Op)}})
switch req.Op {
case structs.PreparedQueryCreate, structs.PreparedQueryUpdate:
return c.state.PreparedQuerySet(index, req.Query)
case structs.PreparedQueryDelete:
return c.state.PreparedQueryDelete(index, req.Query.ID)
default:
c.logger.Printf("[WARN] consul.fsm: Invalid PreparedQuery operation '%s'", req.Op)
return fmt.Errorf("Invalid PreparedQuery operation '%s'", req.Op)
}
}
func (c *FSM) applyTxn(buf []byte, index uint64) interface{} {
var req structs.TxnRequest
if err := structs.Decode(buf, &req); err != nil {
panic(fmt.Errorf("failed to decode request: %v", err))
}
defer metrics.MeasureSince([]string{"consul", "fsm", "txn"}, time.Now())
defer metrics.MeasureSince([]string{"fsm", "txn"}, time.Now())
results, errors := c.state.TxnRW(index, req.Ops)
return structs.TxnResponse{
Results: results,
Errors: errors,
}
}
func (c *FSM) applyAutopilotUpdate(buf []byte, index uint64) interface{} {
var req structs.AutopilotSetConfigRequest
if err := structs.Decode(buf, &req); err != nil {
panic(fmt.Errorf("failed to decode request: %v", err))
}
defer metrics.MeasureSince([]string{"consul", "fsm", "autopilot"}, time.Now())
defer metrics.MeasureSince([]string{"fsm", "autopilot"}, time.Now())
if req.CAS {
act, err := c.state.AutopilotCASConfig(index, req.Config.ModifyIndex, &req.Config)
if err != nil {
return err
}
return act
}
return c.state.AutopilotSetConfig(index, &req.Config)
}