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Copy pathinit.go
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51 lines (45 loc) · 1.47 KB
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package main
import (
"fmt"
"os"
"runtime"
"strconv"
"github.com/opencontainers/runc/libcontainer"
"github.com/opencontainers/runc/libcontainer/logs"
_ "github.com/opencontainers/runc/libcontainer/nsenter"
"github.com/sirupsen/logrus"
)
func init() {
if len(os.Args) > 1 && os.Args[1] == "init" {
// This is the golang entry point for runc init, executed
// before main() but after libcontainer/nsenter's nsexec().
runtime.GOMAXPROCS(1)
runtime.LockOSThread()
level := os.Getenv("_LIBCONTAINER_LOGLEVEL")
logLevel, err := logrus.ParseLevel(level)
if err != nil {
panic(fmt.Sprintf("libcontainer: failed to parse log level: %q: %v", level, err))
}
logPipeFdStr := os.Getenv("_LIBCONTAINER_LOGPIPE")
logPipeFd, err := strconv.Atoi(logPipeFdStr)
if err != nil {
panic(fmt.Sprintf("libcontainer: failed to convert environment variable _LIBCONTAINER_LOGPIPE=%s to int: %s", logPipeFdStr, err))
}
err = logs.ConfigureLogging(logs.Config{
LogPipeFd: logPipeFd,
LogFormat: "json",
LogLevel: logLevel,
})
if err != nil {
panic(fmt.Sprintf("libcontainer: failed to configure logging: %v", err))
}
logrus.Debug("child process in init()")
factory, _ := libcontainer.New("")
if err := factory.StartInitialization(); err != nil {
// as the error is sent back to the parent there is no need to log
// or write it to stderr because the parent process will handle this
os.Exit(1)
}
panic("libcontainer: container init failed to exec")
}
}