func main() {
defer shutdown.Exit()
usage := `usage: flynn-host [-h|--help] [--version] <command> [<args>...]
Options:
-h, --help Show this message
--version Show current version
Commands:
help Show usage for a specific command
init Create cluster configuration for daemon
daemon Start the daemon
update Update Flynn components
download Download container images
bootstrap Bootstrap layer 1
inspect Get low-level information about a job
log Get the logs of a job
ps List jobs
stop Stop running jobs
destroy-volumes Destroys the local volume database
collect-debug-info Collect debug information into an anonymous gist or tarball
version Show current version
See 'flynn-host help <command>' for more information on a specific command.
`
args, _ := docopt.Parse(usage, nil, true, version.String(), true)
cmd := args.String["<command>"]
cmdArgs := args.All["<args>"].([]string)
if cmd == "help" {
if len(cmdArgs) == 0 { // `flynn help`
fmt.Println(usage)
return
} else { // `flynn help <command>`
cmd = cmdArgs[0]
cmdArgs = []string{"--help"}
}
}
if cmd == "daemon" {
// merge in args and env from config file, if available
var c *config.Config
if n := os.Getenv("FLYNN_HOST_CONFIG"); n != "" {
var err error
c, err = config.Open(n)
if err != nil {
log.Fatalf("error opening config file %s: %s", n, err)
}
} else {
var err error
c, err = config.Open(configFile)
if err != nil && !os.IsNotExist(err) {
log.Fatalf("error opening config file %s: %s", configFile, err)
}
if c == nil {
c = &config.Config{}
}
}
cmdArgs = append(cmdArgs, c.Args...)
for k, v := range c.Env {
os.Setenv(k, v)
}
}
if err := cli.Run(cmd, cmdArgs); err != nil {
if err == cli.ErrInvalidCommand {
fmt.Printf("ERROR: %q is not a valid command\n\n", cmd)
fmt.Println(usage)
shutdown.ExitWithCode(1)
}
shutdown.Fatal(err)
}
}
func main() {
// when starting a container with libcontainer, we first exec the
// current binary with libcontainer-init as the first argument,
// which triggers the following code to initialise the container
// environment (namespaces, network etc.) then exec containerinit
if len(os.Args) > 1 && os.Args[1] == "libcontainer-init" {
runtime.GOMAXPROCS(1)
runtime.LockOSThread()
factory, _ := libcontainer.New("")
if err := factory.StartInitialization(); err != nil {
log.Fatal(err)
}
}
defer shutdown.Exit()
usage := `usage: flynn-host [-h|--help] [--version] <command> [<args>...]
Options:
-h, --help Show this message
--version Show current version
Commands:
help Show usage for a specific command
init Create cluster configuration for daemon
daemon Start the daemon
update Update Flynn components
download Download container images
bootstrap Bootstrap layer 1
inspect Get low-level information about a job
log Get the logs of a job
ps List jobs
stop Stop running jobs
signal Signal a job
destroy-volumes Destroys the local volume database
collect-debug-info Collect debug information into an anonymous gist or tarball
list Lists ID and IP of each host
version Show current version
fix Fix a broken cluster
tags Manage flynn-host daemon tags
discover Return low-level information about a service
See 'flynn-host help <command>' for more information on a specific command.
`
args, _ := docopt.Parse(usage, nil, true, version.String(), true)
cmd := args.String["<command>"]
cmdArgs := args.All["<args>"].([]string)
if cmd == "help" {
if len(cmdArgs) == 0 { // `flynn help`
fmt.Println(usage)
return
} else { // `flynn help <command>`
cmd = cmdArgs[0]
cmdArgs = []string{"--help"}
}
}
if cmd == "daemon" {
// merge in args and env from config file, if available
var c *config.Config
if n := os.Getenv("FLYNN_HOST_CONFIG"); n != "" {
var err error
c, err = config.Open(n)
if err != nil {
shutdown.Fatalf("error opening config file %s: %s", n, err)
}
} else {
var err error
c, err = config.Open(configFile)
if err != nil && !os.IsNotExist(err) {
shutdown.Fatalf("error opening config file %s: %s", configFile, err)
}
if c == nil {
c = &config.Config{}
}
}
cmdArgs = append(cmdArgs, c.Args...)
for k, v := range c.Env {
os.Setenv(k, v)
}
}
if err := cli.Run(cmd, cmdArgs); err != nil {
if err == cli.ErrInvalidCommand {
fmt.Printf("ERROR: %q is not a valid command\n\n", cmd)
fmt.Println(usage)
shutdown.ExitWithCode(1)
} else if _, ok := err.(cli.ErrAlreadyLogged); ok {
shutdown.ExitWithCode(1)
}
shutdown.Fatal(err)
}
}