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Add support to provide multiple service rules directly.
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,47 @@ | ||
| package main | ||
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| import ( | ||
| "os" | ||
| "os/signal" | ||
| "syscall" | ||
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| tunnel "github.com/dariopb/goreverselb/pkg" | ||
| "github.com/urfave/cli/v2" | ||
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| log "github.com/sirupsen/logrus" | ||
| ) | ||
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| func servicegroup(ctx *cli.Context) error { | ||
| printVersion() | ||
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| loglevel := log.DebugLevel | ||
| if l, err := log.ParseLevel(loglevelstr); err == nil { | ||
| loglevel = l | ||
| } | ||
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| //log.AddHook(ProcessCounter) | ||
| //log.SetFormatter(&log.TextFormatter{ForceColors: true}) | ||
| log.SetFormatter(&log.TextFormatter{ | ||
| //DisableColors: true, | ||
| FullTimestamp: true, | ||
| }) | ||
| log.SetLevel(loglevel) | ||
| log.SetOutput(os.Stdout) | ||
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| tsg, err := tunnel.NewMuxTunnelClientServiceGroup(lbapiendpoint, token) | ||
| if err != nil { | ||
| log.Fatalf("failed to start new tunnel service group: ", err) | ||
| } | ||
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| err = tsg.ReconcileServiceGroupFromJSON(servicemapjson) | ||
| if err != nil { | ||
| log.Fatalf("failed to reconcile service group: ", err) | ||
| } | ||
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| c := make(chan os.Signal, 2) | ||
| signal.Notify(c, os.Interrupt, syscall.SIGTERM) | ||
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| <-c | ||
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| return nil | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,9 @@ | ||
| FROM alpine | ||
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| WORKDIR / | ||
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| COPY goreverselb /goreverselb | ||
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| EXPOSE 9999 | ||
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| CMD ["/goreverselb", "tunnelgroup"] |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,175 @@ | ||
| package tunnel | ||
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| import ( | ||
| "encoding/json" | ||
| "fmt" | ||
| "reflect" | ||
| "sync" | ||
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| log "github.com/sirupsen/logrus" | ||
| ) | ||
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| type MuxTunnelClientServiceGroup struct { | ||
| apiEndpoint string | ||
| token string | ||
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| ServiceMap map[string]*ServiceInfo | ||
| tunnels map[string]map[string]*MuxTunnelClient | ||
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| mtx sync.Mutex | ||
| } | ||
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| type ServiceInfo struct { | ||
| Name string `json:"name"` | ||
| Ports []PortData `json:"ports"` | ||
| BackendIPs []string `json:"backendIPs"` | ||
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| Deleted bool `json:"deleted"` | ||
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| tunnelEndpointAPI string | ||
| token string | ||
| } | ||
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| type PortData struct { | ||
| Port int `json:"port"` | ||
| Protocol string `json:"protocol"` | ||
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| TargetPort int `json:"targetPort"` | ||
| } | ||
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| // NewMuxTunnelClientServiceGroup creates a group of multiple services/clients. | ||
| func NewMuxTunnelClientServiceGroup(apiEndpoint string, token string) (*MuxTunnelClientServiceGroup, error) { | ||
| var err error | ||
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| log.Infof("NewMuxTunnelClientServiceGroup: on %s", apiEndpoint) | ||
| c := &MuxTunnelClientServiceGroup{ | ||
| apiEndpoint: apiEndpoint, | ||
| token: token, | ||
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| ServiceMap: make(map[string]*ServiceInfo), | ||
| tunnels: make(map[string]map[string]*MuxTunnelClient), | ||
| } | ||
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| return c, err | ||
| } | ||
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| func (c *MuxTunnelClientServiceGroup) reconcileTunnels(srv *ServiceInfo) { | ||
| var svcTunnelMap map[string]*MuxTunnelClient | ||
| ok := false | ||
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| if srv.tunnelEndpointAPI != "" { | ||
| if svcTunnelMap, ok = c.tunnels[srv.Name]; !ok { | ||
| svcTunnelMap = make(map[string]*MuxTunnelClient) | ||
| c.tunnels[srv.Name] = svcTunnelMap | ||
| } | ||
| } | ||
|
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| portsGone := make(map[string]bool) | ||
| for portKey := range svcTunnelMap { | ||
| portsGone[portKey] = true | ||
| } | ||
|
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| if !srv.Deleted { | ||
| for _, p := range srv.Ports { | ||
| k := fmt.Sprintf("%s-%d", p.Protocol, p.Port) | ||
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| var err error | ||
| var t *MuxTunnelClient | ||
| if t, ok = svcTunnelMap[k]; !ok { | ||
| td := TunnelData{ | ||
| ServiceName: srv.Name, | ||
| BackendAcceptBacklog: 1, | ||
| FrontendData: FrontendData{ | ||
| Port: p.Port, | ||
| }, | ||
| Token: srv.token, | ||
| TargetPort: p.TargetPort, | ||
| TargetAddresses: []string{}, | ||
| } | ||
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| t, err = NewMuxTunnelClient(srv.tunnelEndpointAPI, td) | ||
| if err != nil { | ||
| continue | ||
| } | ||
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| svcTunnelMap[k] = t | ||
| } | ||
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| delete(portsGone, k) | ||
| belist := t.TargetAddresses() | ||
| if !reflect.DeepEqual(srv.BackendIPs, belist) { | ||
| log.Info("Updating backend addresses on tunnel", "Service", srv.Name, "IPs", srv.BackendIPs) | ||
| t.UpdateTargetAddresses(srv.BackendIPs) | ||
| } | ||
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| beport := t.TargetPort() | ||
| if beport != p.TargetPort { | ||
| log.Info("Updating backend port on tunnel", "Service", srv.Name, "port", p.TargetPort) | ||
| t.UpdateTargetPort(p.TargetPort) | ||
| } | ||
| } | ||
| } | ||
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| // Removed ports, delete the tunnels | ||
| for portKey := range portsGone { | ||
| t := svcTunnelMap[portKey] | ||
| t.Close() | ||
| delete(svcTunnelMap, portKey) | ||
| } | ||
| } | ||
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| // ReconcileServiceGroup reconciles the map of services with a new map of services | ||
| func (c *MuxTunnelClientServiceGroup) ReconcileServiceGroup(newservices map[string]*ServiceInfo) error { | ||
| c.mtx.Lock() | ||
| defer c.mtx.Unlock() | ||
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| srvGone := make(map[string]bool) | ||
| for name := range c.ServiceMap { | ||
| srvGone[name] = true | ||
| } | ||
|
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| for _, newservice := range newservices { | ||
| svcname := newservice.Name | ||
|
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| var srv *ServiceInfo | ||
| var ok bool | ||
| if srv, ok = c.ServiceMap[svcname]; !ok { | ||
| srv = &ServiceInfo{ | ||
| Name: svcname, | ||
| BackendIPs: newservice.BackendIPs, | ||
| Ports: newservice.Ports, | ||
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| tunnelEndpointAPI: c.apiEndpoint, | ||
| token: c.token, | ||
| } | ||
|
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| c.ServiceMap[svcname] = srv | ||
| } else { | ||
| delete(srvGone, svcname) | ||
| } | ||
|
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| c.reconcileTunnels(srv) | ||
| } | ||
|
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| // Removed services, delete the tunnels | ||
| for name := range srvGone { | ||
| srv := c.ServiceMap[name] | ||
| srv.Deleted = true | ||
| c.reconcileTunnels(srv) | ||
| delete(c.ServiceMap, name) | ||
| } | ||
|
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| return nil | ||
| } | ||
|
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| // ReconcileServiceGroupFromJSON reconciles the map of services with a new map of services | ||
| // {"name":"srv-1234","ports":[{"port":8000,"protocol":"tcp"}],"backendIPs":["127.0.0.1"],"deleted":false} | ||
| func (c *MuxTunnelClientServiceGroup) ReconcileServiceGroupFromJSON(jsonstr string) error { | ||
| var newservices map[string]*ServiceInfo | ||
| err := json.Unmarshal([]byte(jsonstr), &newservices) | ||
| if err != nil { | ||
| return err | ||
| } | ||
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| return c.ReconcileServiceGroup(newservices) | ||
| } |