| package main |
| |
| import ( |
| "fmt" |
| "os" |
| "runtime" |
| |
| "github.com/opencontainers/runc/libcontainer" |
| "github.com/opencontainers/runc/libcontainer/logs" |
| _ "github.com/opencontainers/runc/libcontainer/nsenter" |
| "github.com/sirupsen/logrus" |
| "github.com/urfave/cli" |
| ) |
| |
| func init() { |
| if len(os.Args) > 1 && os.Args[1] == "init" { |
| 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)) |
| } |
| |
| err = logs.ConfigureLogging(logs.Config{ |
| LogPipeFd: os.Getenv("_LIBCONTAINER_LOGPIPE"), |
| LogFormat: "json", |
| LogLevel: logLevel, |
| }) |
| if err != nil { |
| panic(fmt.Sprintf("libcontainer: failed to configure logging: %v", err)) |
| } |
| logrus.Debug("child process in init()") |
| } |
| } |
| |
| var initCommand = cli.Command{ |
| Name: "init", |
| Usage: `initialize the namespaces and launch the process (do not call it outside of runc)`, |
| Action: func(context *cli.Context) error { |
| 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") |
| }, |
| } |