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thirdpartyha.go
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thirdpartyha.go
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/*
* Tencent is pleased to support the open source community by making TKEStack
* available.
*
* Copyright (C) 2012-2019 Tencent. All Rights Reserved.
*
* 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
*
* https://opensource.org/licenses/Apache-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 OF ANY KIND, either express or implied. See the License for the
* specific language governing permissions and limitations under the License.
*/
package thirdpartyha
import (
"fmt"
"strings"
"tkestack.io/tke/pkg/util/log"
"tkestack.io/tke/pkg/util/ssh"
)
type Option struct {
IP string
VIP string
VPort int32
}
func Clear(s ssh.Interface, option *Option) {
for {
cmd := fmt.Sprintf("iptables -w 30 -t nat -D OUTPUT -p tcp -d %s --dport %d -j REDIRECT --to-ports 6443",
option.VIP, option.VPort)
_, err := s.CombinedOutput(cmd)
log.Info(fmt.Sprintf("delete iptables %s err:%s", cmd, err))
if err != nil {
break
}
}
}
// Install solve request roll back problem by rediect request to local host
func Install(s ssh.Interface, option *Option) error {
cmd := fmt.Sprintf("iptables -w 30 -t nat -C OUTPUT -p tcp -d %s --dport %d -j REDIRECT --to-ports 6443",
option.VIP, option.VPort)
_, err := s.CombinedOutput(cmd)
if err != nil && strings.Contains(err.Error(), "rule exist") { // redirect request to local port
cmd := fmt.Sprintf("iptables -w 30 -t nat -I OUTPUT -p tcp -d %s --dport %d -j REDIRECT --to-ports 6443",
option.VIP, option.VPort)
_, err = s.CombinedOutput(cmd)
if err != nil {
return fmt.Errorf("run cmd(%s) error:%s", cmd, err)
}
}
log.Info("redirect vip:vport request to local host and local port.", log.String("node", option.IP))
return nil
}