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// RAINBOND, Application Management Platform
// Copyright (C) 2014-2017 Goodrain Co., Ltd.
// 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 nginxcmd
import (
"fmt"
"os"
"os/exec"
"path"
"github.com/Sirupsen/logrus"
"github.com/prometheus/client_golang/prometheus"
)
var (
nginxBinary = "nginx"
defaultNginxConf = "/run/nginx/conf/nginx.conf"
//ErrorCheck check config file failure
ErrorCheck = fmt.Errorf("error check config")
updateCount = prometheus.NewCounter(prometheus.CounterOpts{
Namespace: "gateway",
Subsystem: "",
Name: "nginx_update",
Help: "Number of nginx updates inside the gateway",
})
errUpdateCount = prometheus.NewCounter(prometheus.CounterOpts{
Namespace: "gateway",
Subsystem: "",
Name: "nginx_update_err",
Help: "Number of nginx error updates inside the gateway",
})
)
func init() {
nginxBinary = path.Join(os.Getenv("OPENRESTY_HOME"), "/nginx/sbin/nginx")
ngx := os.Getenv("NGINX_BINARY")
if ngx != "" {
nginxBinary = ngx
}
}
//SetDefaultNginxConf set
func SetDefaultNginxConf(path string) {
defaultNginxConf = path
}
//PromethesuScrape prometheus scrape
func PromethesuScrape(ch chan<- *prometheus.Desc) {
updateCount.Describe(ch)
errUpdateCount.Describe(ch)
}
//PrometheusCollect prometheus collect
func PrometheusCollect(ch chan<- prometheus.Metric) {
updateCount.Collect(ch)
errUpdateCount.Collect(ch)
}
//CreateNginxCommand create nginx command
func CreateNginxCommand(args ...string) *exec.Cmd {
var cmdArgs []string
cmdArgs = append(cmdArgs, "-c", defaultNginxConf)
cmdArgs = append(cmdArgs, args...)
cmd := exec.Command(nginxBinary, cmdArgs...)
return cmd
}
//ExecNginxCommand exec nginx command
func ExecNginxCommand(args ...string) error {
cmd := CreateNginxCommand(args...)
if body, err := cmd.Output(); err != nil {
if eerr, ok := err.(*exec.ExitError); ok {
logrus.Errorf("nginx exec failure:%s", string(eerr.Stderr))
}
if len(body) > 0 {
logrus.Errorf("nginx exec failure:%s", string(body))
}
return err
}
return nil
}
//CheckConfig check nginx config file
func CheckConfig() error {
if err := ExecNginxCommand("-t"); err != nil {
return ErrorCheck
}
return nil
}
//Reload reload nginx config
func Reload() error {
updateCount.Inc()
if err := ExecNginxCommand("-s", "reload"); err != nil {
errUpdateCount.Inc()
return err
}
logrus.Infof("nginx config reload success")
return nil
}
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