zt/zttest/ztlab/component_zt_tunnel.go

/*
	Copyright 2019 NetFoundry 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

	https://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 ztlab

import (
	"fmt"
	"strings"

	"github.com/hanzozt/fablab/kernel/model"
	"github.com/hanzozt/foundation/v2/versions"
	"github.com/hanzozt/zt/zttest/ztlab/stagezt"
	"github.com/sirupsen/logrus"
)

var _ model.ComponentType = (*ZitiTunnelType)(nil)

type ZitiTunnelMode int

const (
	ZitiTunnelModeTproxy ZitiTunnelMode = 0
	ZitiTunnelModeProxy  ZitiTunnelMode = 1
	ZitiTunnelModeHost   ZitiTunnelMode = 2

	ZitiTunnelActionsReEnroll = "reEnroll"
)

func (self ZitiTunnelMode) String() string {
	if self == ZitiTunnelModeTproxy {
		return "tproxy"
	}
	if self == ZitiTunnelModeProxy {
		return "proxy"
	}
	if self == ZitiTunnelModeHost {
		return "host"
	}
	return "invalid"
}

type ZitiTunnelType struct {
	Mode                     ZitiTunnelMode
	Version                  string
	LocalPath                string
	ConfigPathF              func(c *model.Component) string
	Count                    uint8
	DefaultRouterConnections uint8
	ControlRouterConnections uint8
	EnableSdkFlowControl     bool
	Verbose                  bool
}

func (self *ZitiTunnelType) Label() string {
	return "zt-tunnel"
}

func (self *ZitiTunnelType) GetVersion() string {
	return self.Version
}

func (self *ZitiTunnelType) SetVersion(version string) {
	self.Version = version
}

func (self *ZitiTunnelType) GetActions() map[string]model.ComponentAction {
	return map[string]model.ComponentAction{
		ZitiTunnelActionsReEnroll: model.ComponentActionF(self.ReEnroll),
	}
}

func (self *ZitiTunnelType) InitType(*model.Component) {
	canonicalizeGoAppVersion(&self.Version)
	if self.Count < 1 {
		self.Count = 1
	}
	if self.DefaultRouterConnections == 0 {
		self.DefaultRouterConnections = 1
	}
	if self.DefaultRouterConnections > 5 {
		self.DefaultRouterConnections = 5
	}
	if self.ControlRouterConnections > 1 {
		self.ControlRouterConnections = 1
	}

	if self.DefaultRouterConnections > 1 {
		self.EnableSdkFlowControl = true
	}
}

func (self *ZitiTunnelType) Dump() any {
	return map[string]string{
		"type_id":    "zt-tunnel",
		"version":    self.Version,
		"local_path": self.LocalPath,
	}
}

func (self *ZitiTunnelType) StageFiles(r model.Run, c *model.Component) error {
	return stagezt.StageZitiOnce(r, c, self.Version, self.LocalPath)
}

func (self *ZitiTunnelType) InitializeHost(_ model.Run, c *model.Component) error {
	if self.Mode == ZitiTunnelModeTproxy {
		return setupDnsForTunneler(c)
	}
	return nil
}

func (self *ZitiTunnelType) getProcessFilter(c *model.Component) func(string) bool {
	return getZitiProcessFilter(c, "tunnel")
}

func (self *ZitiTunnelType) IsRunning(_ model.Run, c *model.Component) (bool, error) {
	pids, err := c.GetHost().FindProcesses(self.getProcessFilter(c))
	if err != nil {
		return false, err
	}
	return len(pids) > 0, nil
}

func (self *ZitiTunnelType) GetConfigPath(c *model.Component) string {
	if self.ConfigPathF != nil {
		return self.ConfigPathF(c)
	}
	return fmt.Sprintf("/home/%s/fablab/cfg/%s.json", c.GetHost().GetSshUser(), c.Id)
}

func (self *ZitiTunnelType) Start(_ model.Run, c *model.Component) error {
	pids, err := c.GetHost().FindProcesses(self.getProcessFilter(c))
	if err != nil {
		return err
	}
	if len(pids) >= int(self.Count) {
		fmt.Printf("zt tunnel(s) %s already started\n", c.Id)
		return nil
	}

	count := int(self.Count) - len(pids)
	start := 0
	if len(pids) > 0 {
		start = int(self.Count)
	}
	for n := range count {
		if err = self.StartIndividual(c, start+n); err != nil {
			return err
		}
	}
	return nil
}

func (self *ZitiTunnelType) StartIndividual(c *model.Component, idx int) error {
	mode := self.Mode

	user := c.GetHost().GetSshUser()

	binaryPath := GetZitiBinaryPath(c, self.Version)
	configPath := self.GetConfigPath(c)
	logsPath := fmt.Sprintf("/home/%s/logs/%s-%v.log", user, c.Id, idx)

	useSudo := ""
	if mode == ZitiTunnelModeTproxy {
		useSudo = "sudo"
	}

	supportsSdkFlowControl := self.Version == ""

	if self.Version != "" {
		v := versions.MustParseSemVer(self.Version)
		supportsSdkFlowControl = v.CompareTo(versions.MustParseSemVer("v1.6.6")) >= 0
	}

	connectCfg := ""

	if supportsSdkFlowControl {
		if self.ControlRouterConnections > 0 {
			connectCfg += fmt.Sprintf("--control-connections %d", self.ControlRouterConnections)
		}

		if self.DefaultRouterConnections > 1 {
			connectCfg += fmt.Sprintf(" --default-connections %d", self.DefaultRouterConnections)
		}

		if self.EnableSdkFlowControl {
			connectCfg += fmt.Sprintf(" --sdk-flow-control=%v", self.EnableSdkFlowControl)
		}
	}

	verbose := ""

	if self.Verbose {
		verbose = "-v"
	}

	serviceCmd := fmt.Sprintf("%s %s tunnel %s %s %s --cli-agent-alias %s --log-formatter json -i %s > %s 2>&1 &",
		useSudo, binaryPath, mode.String(), connectCfg, verbose, c.Id, configPath, logsPath)

	value, err := c.Host.ExecLogged(
		"rm -f "+logsPath,
		serviceCmd)
	if err != nil {
		return err
	}

	if len(value) > 0 {
		logrus.Infof("output [%s]", strings.Trim(value, " \t\r\n"))
	}

	return nil
}

func (self *ZitiTunnelType) Stop(_ model.Run, c *model.Component) error {
	return c.GetHost().KillProcesses("-KILL", self.getProcessFilter(c))
}

func (self *ZitiTunnelType) ReEnroll(run model.Run, c *model.Component) error {
	return reEnrollIdentity(run, c, GetZitiBinaryPath(c, self.Version), self.GetConfigPath(c))
}