Brendan LE GLAUNEC
106 lines
2.8 KiB
Go
106 lines
2.8 KiB
Go
// Copyright 2016 Etix Labs
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package main
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import (
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"fmt"
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"os/exec"
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"strings"
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"sync"
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)
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// ServiceConfig contains the configuration variables for the service structure
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type ServiceConfig struct {
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Path string `json:"path"`
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Args string `json:"args"`
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Ports string `json:"ports"`
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IdsPath string `json:"ids_path"`
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RoutesPath string `json:"routes_path"`
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ThumbPath string `json:"thumb_path"`
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DbHost string `json:"db_host"`
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DbPort int `json:"db_port"`
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DbUser string `json:"db_user"`
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DbPassword string `json:"db_password"`
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DbName string `json:"db_name"`
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Console bool `json:"console"`
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}
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// Service allows to run a command and to access its logs asynchronously
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type Service struct {
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Config ServiceConfig // Configuration variables
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Logs []string // Contains the executer's logs
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Active bool // Based on io.ReadCloser status
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Mutex sync.Mutex // Used to append to the logs safely
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cmd *exec.Cmd // Pointer to the executer
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}
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func startService(service *Service, config ServiceConfig) bool {
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// Launch service
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service.Config = config
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args := strings.Fields(service.Config.Args)
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service.cmd = exec.Command(service.Config.Path, args...)
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handler, err := service.cmd.StdoutPipe()
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if err != nil {
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fmt.Println(err)
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return false
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}
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errHandler, err := service.cmd.StderrPipe()
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if err != nil {
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fmt.Println(err)
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return false
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}
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// Launch
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err = service.cmd.Start()
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if err != nil {
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fmt.Println(err)
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return false
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}
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fmt.Printf("Service: [%s] started\n", service.Config.Path)
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service.Active = true
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// Read service logs and update service status
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// Set pipes
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go readLog(service, handler)
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go readLog(service, errHandler)
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return true
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}
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// Stop only specified service instance
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func stopService(service *Service) {
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service.cmd.Process.Kill()
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}
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// Kill all instances of specified service
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func killService(service *Service) {
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// Sending SIGTERM
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fmt.Printf("Executing: killall %s\n", service.Config.Path)
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cmd := exec.Command("killall", service.Config.Path)
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err := cmd.Run()
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if err != nil {
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fmt.Println(err)
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}
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sigAbort := []string{service.Config.Path, "-s", "SIGABRT"}
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fmt.Printf("Executing: killall %s -s SIGABRT\n", service.Config.Path)
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cmd = exec.Command("killall", sigAbort...)
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err = cmd.Run()
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if err != nil {
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fmt.Println(err)
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}
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}
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