Ralf HaferkampandRalf Haferkamp
8ec82331cc
Previously the Supervisor was shutdonw as soon as the main context was
canceled. Which cause the managed services to fail during shutdown (in
"trapShutdownCtx()") as the Supervisor was gone already.
We now pass a separate Context to Supervisor.ServeBackground() to avoid
this.
Fixes: #2282
(cherry picked from commit 7a149787d0)
OpenCloud: Runtime
Pman is a slim utility library for supervising long-running processes. It can be embedded or used as a cli command.
When used as a CLI command it relays actions to a running runtime.
Usage
Start a runtime
package main
import "github.com/opencloude-eu/opencloud/opencloud/pkg/runtime/service"
func main() {
service.Start()
}
Start sending messages
Example
package main
import (
"fmt"
"github.com/opencloud-eu/opencloud/opencloud/pkg/runtime/process"
"github.com/opencloud-eu/opencloud/opencloud/pkg/runtime/service"
"github.com/rs/zerolog/log"
"os"
"os/signal"
"syscall"
"time"
)
func main() {
s := service.NewService()
var c = make(chan os.Signal, 1)
var o int
signal.Notify(c, syscall.SIGINT, syscall.SIGTERM)
if err := s.Start(process.NewProcEntry("ocs", nil, "ocs"), &o); err != nil {
os.Exit(1)
}
time.AfterFunc(3*time.Second, func() {
var acc = "ocs"
fmt.Printf(fmt.Sprintf("shutting down service: %s", acc))
if err := s.Controller.Kill(&acc); err != nil {
log.Fatal()
}
os.Exit(0)
})
for {
select {
case <-c:
return
}
}
}
Run the example above with RUNTIME_KEEP_ALIVE=true and with no RUNTIME_KEEP_ALIVE set to see its behavior. It requires an OpenCloud binary present in your $PATH for it to work.