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launch.go
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launch.go
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//go:build !windows
/***************************************************************
*
* Copyright (C) 2024, Pelican Project, Morgridge Institute for Research
*
* 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
*
* http://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 xrootd
import (
"context"
_ "embed"
"path/filepath"
"regexp"
"strconv"
"time"
"github.com/pelicanplatform/pelican/config"
"github.com/pelicanplatform/pelican/daemon"
"github.com/pelicanplatform/pelican/param"
"github.com/pkg/errors"
log "github.com/sirupsen/logrus"
"golang.org/x/sync/errgroup"
)
type (
PrivilegedXrootdLauncher struct {
daemonName string
configPath string
}
UnprivilegedXrootdLauncher struct {
daemon.DaemonLauncher
isCache bool
}
)
func (launcher PrivilegedXrootdLauncher) Name() string {
return launcher.daemonName
}
func makeUnprivilegedXrootdLauncher(daemonName string, configPath string, isCache bool) (result UnprivilegedXrootdLauncher, err error) {
result.DaemonName = daemonName + ".origin"
if isCache {
result.DaemonName = daemonName + ".cache"
}
result.Uid = -1
result.Gid = -1
result.isCache = isCache
xrootdRun := param.Origin_RunLocation.GetString()
if isCache {
xrootdRun = param.Cache_RunLocation.GetString()
}
pidFile := filepath.Join(xrootdRun, "xrootd.pid")
result.Args = []string{daemonName, "-s", pidFile, "-c", configPath}
if config.IsRootExecution() {
result.Uid, err = config.GetDaemonUID()
if err != nil {
return
}
result.Gid, err = config.GetDaemonGID()
if err != nil {
return
}
}
if isCache {
result.ExtraEnv = []string{
"XRD_PELICANBROKERSOCKET=" + filepath.Join(xrootdRun, "cache-reversal.sock"),
"XRD_PLUGINCONFDIR=" + filepath.Join(xrootdRun, "cache-client.plugins.d"),
"X509_CERT_FILE=" + filepath.Join(xrootdRun, "ca-bundle.crt"),
}
}
return
}
func ConfigureLaunchers(privileged bool, configPath string, useCMSD bool, enableCache bool) (launchers []daemon.Launcher, err error) {
if privileged {
launchers = append(launchers, PrivilegedXrootdLauncher{"xrootd", configPath})
if useCMSD {
launchers = append(launchers, PrivilegedXrootdLauncher{"cmsd", configPath})
}
} else {
var result UnprivilegedXrootdLauncher
result, err = makeUnprivilegedXrootdLauncher("xrootd", configPath, enableCache)
if err != nil {
return
}
launchers = append(launchers, result)
if useCMSD {
result, err = makeUnprivilegedXrootdLauncher("cmsd", configPath, false)
if err != nil {
return
}
launchers = append(launchers, result)
}
}
return
}
func LaunchDaemons(ctx context.Context, launchers []daemon.Launcher, egrp *errgroup.Group, portStartCallback func(int)) (pids []int, err error) {
startupChan := make(chan int)
readyChan := make(chan bool)
defer close(readyChan)
re := regexp.MustCompile(`^------ xrootd [A-Za-z0-9]+@[A-Za-z0-9.\-]+:([0-9]+) initialization complete.*`)
config.AddFilter(&config.RegexpFilter{
Name: "xrootd_startup",
Regexp: re,
Levels: []log.Level{log.InfoLevel},
Fire: func(e *log.Entry) error {
portStrs := re.FindStringSubmatch(e.Message)
if len(portStrs) < 1 {
portStrs = []string{"", ""}
}
port, err := strconv.Atoi(portStrs[1])
if err != nil {
port = -1
}
if _, ok := <-readyChan; ok {
startupChan <- port
}
return nil
},
})
config.AddFilter(&config.RegexpFilter{
Name: "xrootd_startup_failed",
Regexp: regexp.MustCompile(`^------ xrootd [A-Za-z0-9]+@[A-Za-z0-9.\-]+:([0-9]+) initialization failed.*`),
Levels: []log.Level{log.InfoLevel},
Fire: func(e *log.Entry) error {
if _, ok := <-readyChan; ok {
startupChan <- -1
}
return nil
},
})
defer func() {
config.RemoveFilter("xrootd_startup")
config.RemoveFilter("xrootd_startup_failed")
close(startupChan)
}()
pids, err = daemon.LaunchDaemons(ctx, launchers, egrp)
if err != nil {
return
}
ticker := time.NewTicker(10 * time.Second)
defer ticker.Stop()
select {
case <-ctx.Done():
err = ctx.Err()
return
case readyChan <- true:
port := <-startupChan
if port == -1 {
err = errors.New("Xrootd initialization failed")
return
} else {
portStartCallback(port)
}
case <-ticker.C:
log.Errorln("XRootD did not startup after 10s of waiting")
err = errors.New("XRootD did not startup after 10s of waiting")
return
}
return
}