forked from tikv/pd
/
drive.go
148 lines (131 loc) · 3.4 KB
/
drive.go
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// Copyright 2017 PingCAP, Inc.
//
// 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,
// See the License for the specific language governing permissions and
// limitations under the License.
package faketikv
import (
"context"
"fmt"
"github.com/juju/errors"
"github.com/pingcap/pd/pkg/faketikv/cases"
"github.com/pingcap/pd/pkg/faketikv/simutil"
)
// Driver promotes the cluster status change.
type Driver struct {
addr string
confName string
conf *cases.Conf
clusterInfo *ClusterInfo
client Client
tickCount int64
}
// NewDriver returns a driver.
func NewDriver(addr string, confName string) *Driver {
return &Driver{
addr: addr,
confName: confName,
}
}
// Prepare initializes cluster information, bootstraps cluster and starts nodes.
func (d *Driver) Prepare() error {
d.conf = cases.NewConf(d.confName)
if d.conf == nil {
return errors.Errorf("failed to create conf %s", d.confName)
}
clusterInfo, err := NewClusterInfo(d.addr, d.conf)
if err != nil {
return errors.Trace(err)
}
d.clusterInfo = clusterInfo
// Bootstrap.
store, region, err := clusterInfo.GetBootstrapInfo()
if err != nil {
return errors.Trace(err)
}
d.client = clusterInfo.Nodes[store.GetId()].client
ctx, cancel := context.WithTimeout(context.Background(), pdTimeout)
err = d.client.Bootstrap(ctx, store, region)
cancel()
if err != nil {
simutil.Logger.Fatal("bootstrapped error: ", err)
} else {
simutil.Logger.Debug("Bootstrap success")
}
// Setup alloc id.
for {
id, err := d.client.AllocID(context.Background())
if err != nil {
return errors.Trace(err)
}
if id > d.conf.MaxID {
break
}
}
for _, n := range d.clusterInfo.Nodes {
err := n.Start()
if err != nil {
return err
}
}
return nil
}
// Tick invokes nodes' Tick.
func (d *Driver) Tick() {
d.tickCount++
d.clusterInfo.stepRegions()
if d.conf.WrittenBytes != nil {
d.clusterInfo.updateRegionSize(d.conf.WrittenBytes(d.tickCount))
}
if d.conf.RegionReadBytes != nil {
d.clusterInfo.updateRegionReadBytes(d.conf.RegionReadBytes(d.tickCount))
}
if d.conf.RegionWriteBytes != nil {
d.clusterInfo.updateRegionWriteBytes(d.conf.RegionWriteBytes(d.tickCount))
}
for _, n := range d.clusterInfo.Nodes {
n.Tick()
}
}
// Check checks if the simulation is completed.
func (d *Driver) Check() bool {
return d.conf.Checker(d.clusterInfo.RegionsInfo)
}
// Stop stops all nodes.
func (d *Driver) Stop() {
for _, n := range d.clusterInfo.Nodes {
n.Stop()
}
}
// TickCount returns the simulation's tick count.
func (d *Driver) TickCount() int64 {
return d.tickCount
}
// AddNode adds new node.
func (d *Driver) AddNode(id uint64) {
if _, ok := d.clusterInfo.Nodes[id]; ok {
simutil.Logger.Infof("Node %d already existed", id)
return
}
n, err := NewNode(id, fmt.Sprintf("mock://tikv-%d", id), d.addr)
if err != nil {
simutil.Logger.Debug("Add node failed:", err)
return
}
err = n.Start()
if err != nil {
simutil.Logger.Debug("Start node failed:", err)
return
}
n.clusterInfo = d.clusterInfo
d.clusterInfo.Nodes[n.Id] = n
}
// DeleteNode deletes a node.
func (d *Driver) DeleteNode() {}