/
local_driver.go
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/
local_driver.go
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/*
* Tencent is pleased to support the open source community by making Blueking Container Service available.
* Copyright (C) 2019 THL A29 Limited, a Tencent company. All rights reserved.
* Licensed under the MIT License (the "License"); you may not use this file except
* in compliance with the License. You may obtain a copy of the License at
* http://opensource.org/licenses/MIT
* 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 localdriver
import (
"database/sql"
"fmt"
types "github.com/Tencent/bk-bcs/bcs-common/pkg/bcsapi/netservice"
"github.com/Tencent/bk-bcs/bcs-services/bcs-netservice/bcs-ipam/resource"
"go4.org/lock"
// import sqlite3
_ "github.com/mattn/go-sqlite3"
)
const (
defaultSQLiteDatabase = "/data/bcs/bcs-cni/bin/bcs-ipam.db"
defaultBcsIPAMLocker = "/data/bcs/bcs-cni/bin/ipam.lock"
)
// NewDriver create SQLite3 standard IPDriver
func NewDriver() (resource.IPDriver, error) {
db, err := sql.Open("sqlite3", defaultSQLiteDatabase)
if err != nil {
return nil, err
}
driver := &SQLiteDriver{
database: db,
}
return driver, nil
}
// SQLiteDriver driver for sqlite3
type SQLiteDriver struct {
database *sql.DB
}
// GetIPAddr get available ip resource for contaienr
func (driver *SQLiteDriver) GetIPAddr(host string, containerID, requestIP string) (*types.IPInfo, error) {
// safe lock for multiprocess
closer, lockErr := lock.Lock(defaultBcsIPAMLocker)
if lockErr != nil {
return nil, fmt.Errorf("get bcs-ipam lock err: %v", lockErr)
}
defer closer.Close()
var sql string
if len(requestIP) == 0 {
sql = "select Host,Net,Mask,Gateway from Resource where Status = 'available'"
} else {
sql = "select Host,Net,Mask,Gateway from Resource where Status = 'reserved' and Host = '" + requestIP + "'"
}
rows, err := driver.database.Query(sql)
if err != nil {
return nil, fmt.Errorf("Get available ip resource Err: %s", err.Error())
}
if rows.Next() {
info := new(types.IPInfo)
readErr := rows.Scan(&info.IPAddr, &info.Pool, &info.Mask, &info.Gateway)
if readErr != nil {
return nil, fmt.Errorf("Read available ip failed, %s", readErr.Error())
}
rows.Close()
// active ip address selected
stmt, _ := driver.database.Prepare("update Resource set Status = ?, Container = ? where Host = ?")
defer stmt.Close()
_, exErr := stmt.Exec("active", containerID, info.IPAddr)
if exErr != nil {
return nil, fmt.Errorf("Lock %s failed, %s", info.IPAddr, exErr.Error())
}
return info, nil
}
return nil, fmt.Errorf("No available ip resource")
}
// ReleaseIPAddr release ip address for container
func (driver *SQLiteDriver) ReleaseIPAddr(host string, containerID string, ipInfo *types.IPInfo) error {
// safe lock for multiprocess
closer, lockErr := lock.Lock(defaultBcsIPAMLocker)
if lockErr != nil {
return fmt.Errorf("get bcs-ipam lock err: %v", lockErr)
}
defer closer.Close()
status := "available"
if len(ipInfo.IPAddr) != 0 {
status = "reserved"
}
// release ip address
stmt, _ := driver.database.Prepare("update Resource set Status = ?, Container = ? where Container = ? and Status = ?")
defer stmt.Close()
res, exErr := stmt.Exec(status, "none container", containerID, "active")
if exErr != nil {
return fmt.Errorf("Release %s failed, %s", containerID, exErr.Error())
}
num, _ := res.RowsAffected()
if num < 1 {
return fmt.Errorf("Release %s failed, IP status Not Affected", containerID)
}
return nil
}
// GetHostInfo Get host info from driver
func (driver *SQLiteDriver) GetHostInfo(host string) (*types.HostInfo, error) {
// safe lock for multiprocess
closer, lockErr := lock.Lock(defaultBcsIPAMLocker)
if lockErr != nil {
return nil, fmt.Errorf("get bcs-ipam lock err: %v", lockErr)
}
defer closer.Close()
rows, err := driver.database.Query("select Host,Net,Mask,Gateway,Container from Resource where Status = 'active'")
if err != nil {
return nil, fmt.Errorf("Get active ip resource Err: %s", err.Error())
}
hostInfo := &types.HostInfo{
IPAddr: host,
Containers: make(map[string]*types.IPInst),
}
for rows.Next() {
info := &types.IPInst{
Status: "active",
LastStatus: "available",
Host: host,
}
readErr := rows.Scan(&info.IPAddr, &info.Pool, &info.Mask, &info.Gateway, &info.Container)
if readErr != nil {
return nil, fmt.Errorf("Read active ip info err, %s", readErr.Error())
}
hostInfo.Containers[info.Container] = info
}
rows.Close()
return hostInfo, nil
}