tidb node 源码
tidb node 代码
文件路径：/tidb-binlog/node/node.go
// Copyright 2022 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,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package node
import (
"fmt"
"github.com/pingcap/tidb/util"
)
var (
// DefaultRootPath is the root path of the keys stored in etcd, the `v1` is the tidb-binlog's version.
DefaultRootPath = "/tidb-binlog/v1"
// PumpNode is the name of pump.
PumpNode = "pump"
// DrainerNode is the name of drainer.
DrainerNode = "drainer"
// NodePrefix is the map (node => it's prefix in storage)
NodePrefix = map[string]string{
PumpNode: "pumps",
DrainerNode: "drainers",
}
)
const (
// Online means the node can receive request.
Online = "online"
// Pausing means the node is pausing.
Pausing = "pausing"
// Paused means the node is already paused.
Paused = "paused"
// Closing means the node is closing, and the state will be Offline when closed.
Closing = "closing"
// Offline means the node is offline, and will not provide service.
Offline = "offline"
)
// Label is key/value pairs that are attached to objects
type Label struct {
Labels map[string]string `json:"labels"`
}
// Status describes the status information of a tidb-binlog node in etcd.
type Status struct {
// the id of node.
NodeID string `json:"nodeId"`
// the host of pump or node.
Addr string `json:"host"`
// the state of pump.
State string `json:"state"`
// the node is alive or not.
IsAlive bool `json:"isAlive"`
// the score of node, it is report by node, calculated by node's qps, disk usage and binlog's data size.
// if Score is less than 0, means this node is useless. Now only used for pump.
Score int64 `json:"score"`
// the label of this node. Now only used for pump.
// pump client will only send to a pump which label is matched.
Label *Label `json:"label"`
// for pump: max commit ts in pump
// for drainer: drainer has consume all binlog less than or equal MaxCommitTS
MaxCommitTS int64 `json:"maxCommitTS"`
// UpdateTS is the last update ts of node's status.
UpdateTS int64 `json:"updateTS"`
}
func (s *Status) String() string {
updateTime := util.TSOToRoughTime(s.UpdateTS)
return fmt.Sprintf("{NodeID: %s, Addr: %s, State: %s, MaxCommitTS: %d, UpdateTime: %v}", s.NodeID, s.Addr, s.State, s.MaxCommitTS, updateTime)
}
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