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config_systemd.go
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/
config_systemd.go
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// Copyright (C) 2014-2018 Goodrain Co., Ltd.
// RAINBOND, Application Management Platform
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version. For any non-GPL usage of Rainbond,
// one or multiple Commercial Licenses authorized by Goodrain Co., Ltd.
// must be obtained first.
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
// You should have received a copy of the GNU General Public License
// along with this program. If not, see <http://www.gnu.org/licenses/>.
package service
import (
"regexp"
"fmt"
"github.com/goodrain/rainbond/node/nodem/client"
"strings"
"github.com/Sirupsen/logrus"
"io/ioutil"
"gopkg.in/yaml.v2"
)
var (
ArgsReg = regexp.MustCompile(`\$\{(\w+)\}`)
)
func LoadServicesFromLocal(serviceListFile string) ([]*Service, error) {
// load default-configs.yaml
content, err := ioutil.ReadFile(serviceListFile)
if err != nil {
err = fmt.Errorf("Failed to read service list file: %s", err.Error())
return nil, err
}
var defaultConfigs Services
err = yaml.Unmarshal(content, &defaultConfigs)
if err != nil {
logrus.Error("Failed to parse default configs yaml file: ", err)
return nil, err
}
return defaultConfigs.Services, nil
}
func ToConfig(svc *Service) string {
if svc.Start == "" {
logrus.Error("service start command is empty.")
return ""
}
s := Lines{"[Unit]"}
s.Add("Description", svc.Name)
for _, d := range svc.After {
dpd := d
if !strings.Contains(dpd, ".") {
dpd += ".service"
}
s.Add("After", dpd)
}
for _, d := range svc.Requires {
dpd := d
if !strings.Contains(dpd, ".") {
dpd += ".service"
}
s.Add("Requires", dpd)
}
s.AddTitle("[Service]")
if svc.Type == "oneshot" {
s.Add("Type", svc.Type)
s.Add("RemainAfterExit", "yes")
}
s.Add("ExecStartPre", fmt.Sprintf(`-/bin/bash -c '%s'`, svc.PreStart))
s.Add("ExecStart", fmt.Sprintf(`/bin/bash -c '%s'`, svc.Start))
s.Add("ExecStop", fmt.Sprintf(`/bin/bash -c '%s'`, svc.Stop))
s.Add("Restart", svc.RestartPolicy)
s.Add("RestartSec", svc.RestartSec)
s.AddTitle("[Install]")
s.Add("WantedBy", "multi-user.target")
logrus.Debugf("check is need inject args into service %s", svc.Name)
return s.Get()
}
func InjectConfig(content string, cluster client.ClusterClient) string {
if cluster == nil {
logrus.Error("cluster client can not is nil, at to config.")
return ""
}
for _, parantheses := range ArgsReg.FindAllString(content, -1) {
logrus.Debugf("discover inject args template %s", parantheses)
group := ArgsReg.FindStringSubmatch(parantheses)
if group == nil || len(group) < 2 {
logrus.Warnf("Not found group for ", parantheses)
continue
}
endpoints := cluster.GetEndpoints(group[1])
if len(endpoints) < 1 {
logrus.Warnf("Failed to inject endpoints of key %s", group[1])
continue
}
line := ""
for _, end := range endpoints {
if line == "" {
line = end
}else{
line += ","
line += end
}
}
content = strings.Replace(content, group[0], line, 1)
logrus.Debugf("inject args into service %s => %v", group[1], endpoints)
}
return content
}
type Lines struct {
str string
}
func (l *Lines) AddTitle(line string) {
l.str = fmt.Sprintf("%s\n\n%s", l.str, line)
}
func (l *Lines) Add(k, v string) {
if v == "" {
return
}
l.str = fmt.Sprintf("%s\n%s=%s", l.str, k, v)
}
func (l *Lines) Get() string {
return l.str
}