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Merge pull request #486 from TrekkieCoder/main
PR - gh-483 : Initial support for ipvs compatibilty
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| Original file line number | Diff line number | Diff line change |
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| @@ -0,0 +1,8 @@ | ||
| linters: | ||
| disable-all: true | ||
| enable: | ||
| - gofmt | ||
| - govet | ||
| - ineffassign | ||
| - misspell | ||
| - revive |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,170 @@ | ||
| /* | ||
| * Copyright (c) 2023 NetLOX 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 loxinlp | ||
|
|
||
| import ( | ||
| "fmt" | ||
| "os" | ||
| "reflect" | ||
| "time" | ||
|
|
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| "github.com/loxilb-io/ipvs" | ||
| cmn "github.com/loxilb-io/loxilb/common" | ||
| tk "github.com/loxilb-io/loxilib" | ||
| ) | ||
|
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| type ipVSKey struct { | ||
| Address string | ||
| Protocol string | ||
| Port uint16 | ||
| } | ||
|
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| type ipvsEndPoint struct { | ||
| EpIP string | ||
| EpPort uint16 | ||
| Weight uint8 | ||
| } | ||
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| type ipVSEntry struct { | ||
| Key ipVSKey | ||
| Type string | ||
| InValid bool | ||
| EndPoints []ipvsEndPoint | ||
| } | ||
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| type IpVSH struct { | ||
| RMap map[ipVSKey]*ipVSEntry | ||
| ticker *time.Ticker | ||
| tDone chan bool | ||
| handle *ipvs.Handle | ||
| } | ||
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| var ipVSCtx *IpVSH | ||
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| func (ctx *IpVSH) BuildIpVSDB() []*ipVSEntry { | ||
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| var ipVSList []*ipVSEntry | ||
| svcs, err := ctx.handle.GetServices() | ||
| if err != nil { | ||
| tk.LogIt(tk.LogError, "[ipvs] failed to get services\n") | ||
| return nil | ||
| } | ||
|
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| for _, svc := range svcs { | ||
| var newEntry ipVSEntry | ||
|
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| endPoints, err := ctx.handle.GetDestinations(svc) | ||
| if err != nil { | ||
| continue | ||
| } | ||
|
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| newEntry.Type = svc.SchedName | ||
| if svc.SchedName != "rr" { | ||
| continue | ||
| } | ||
|
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| proto := "" | ||
| if svc.Protocol == 1 { | ||
| proto = "icmp" | ||
| } else if svc.Protocol == 6 { | ||
| proto = "tcp" | ||
| } else if svc.Protocol == 17 { | ||
| proto = "udp" | ||
| } else if svc.Protocol == 132 { | ||
| proto = "sctp" | ||
| } else { | ||
| continue | ||
| } | ||
|
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| key := ipVSKey{Address: svc.Address.String(), Protocol: proto, Port: svc.Port} | ||
| for _, endPoint := range endPoints { | ||
| newEntry.EndPoints = append(newEntry.EndPoints, ipvsEndPoint{EpIP: endPoint.Address.String(), EpPort: endPoint.Port, Weight: uint8(endPoint.Weight)}) | ||
| } | ||
|
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| if len(newEntry.EndPoints) != 0 { | ||
| if eEnt := ctx.RMap[key]; eEnt != nil { | ||
| if reflect.DeepEqual(eEnt.EndPoints, newEntry.EndPoints) { | ||
| eEnt.InValid = false | ||
| continue | ||
| } | ||
| } | ||
|
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| newEntry.Key = key | ||
| ipVSList = append(ipVSList, &newEntry) | ||
| } | ||
| } | ||
| return ipVSList | ||
| } | ||
|
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| func IpVSSync() { | ||
| for { | ||
| select { | ||
| case <-ipVSCtx.tDone: | ||
| return | ||
| case <-ipVSCtx.ticker.C: | ||
|
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| for _, ent := range ipVSCtx.RMap { | ||
| ent.InValid = true | ||
| } | ||
|
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| ipVSList := ipVSCtx.BuildIpVSDB() | ||
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| for _, ent := range ipVSCtx.RMap { | ||
| if ent.InValid { | ||
| name := fmt.Sprintf("ipvs_%s:%d-%s", ent.Key.Address, ent.Key.Port, ent.Key.Protocol) | ||
| lbrule := cmn.LbRuleMod{Serv: cmn.LbServiceArg{ServIP: ent.Key.Address, ServPort: ent.Key.Port, Proto: ent.Key.Protocol, Sel: cmn.LbSelRr, Name: name}} | ||
| _, err := hooks.NetLbRuleDel(&lbrule) | ||
| if err != nil { | ||
| tk.LogIt(tk.LogError, "IPVS LB %v delete failed\n", ent.Key) | ||
| } | ||
| tk.LogIt(tk.LogInfo, "IPVS ent %v deleted\n", ent.Key) | ||
| delete(ipVSCtx.RMap, ent.Key) | ||
| } | ||
| } | ||
|
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| for _, newEnt := range ipVSList { | ||
| name := fmt.Sprintf("ipvs_%s:%d-%s", newEnt.Key.Address, newEnt.Key.Port, newEnt.Key.Protocol) | ||
| lbrule := cmn.LbRuleMod{Serv: cmn.LbServiceArg{ServIP: newEnt.Key.Address, ServPort: newEnt.Key.Port, Proto: newEnt.Key.Protocol, Sel: cmn.LbSelRr, Name: name}} | ||
| for _, ep := range newEnt.EndPoints { | ||
| lbrule.Eps = append(lbrule.Eps, cmn.LbEndPointArg{EpIP: ep.EpIP, EpPort: ep.EpPort, Weight: 1}) | ||
| } | ||
|
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| _, err := hooks.NetLbRuleAdd(&lbrule) | ||
| if err != nil { | ||
| tk.LogIt(tk.LogError, "IPVS LB %v add failed\n", newEnt.Key) | ||
| continue | ||
| } | ||
| ipVSCtx.RMap[newEnt.Key] = newEnt | ||
| tk.LogIt(tk.LogError, "IPVS ent %v added\n", newEnt.Key) | ||
| } | ||
| } | ||
| } | ||
| } | ||
|
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| func IpVSInit() { | ||
| ipVSCtx = new(IpVSH) | ||
| ipVSCtx.ticker = time.NewTicker(10 * time.Second) | ||
| ipVSCtx.RMap = make(map[ipVSKey]*ipVSEntry) | ||
| ipVSCtx.tDone = make(chan bool) | ||
| handle, err := ipvs.New("") | ||
| if err != nil { | ||
| tk.LogIt(tk.LogError, "ipvs.New: %s\n", err) | ||
| os.Exit(1) | ||
| } | ||
| ipVSCtx.handle = handle | ||
| go IpVSSync() | ||
| } |
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