func journalAction(c *cli.Context) {
if len(c.Args()) != 1 {
fmt.Println("One unit file must be provided.")
syscall.Exit(1)
}
jobName := c.Args()[0]
js := registryCtl.GetJobState(jobName)
if js == nil {
fmt.Printf("%s does not appear to be running\n", jobName)
syscall.Exit(1)
}
cmd := fmt.Sprintf("journalctl -u %s --no-pager -l -n %d", jobName, c.Int("lines"))
if c.Bool("follow") {
cmd += " -f"
}
// check if the job is running on this machine
var channel *ssh.Channel
var err error
if machine.IsLocalMachineState(js.MachineState) {
channel = runLocalCommand(cmd)
} else {
channel, err = runRemoteCommand(cmd, js.MachineState.PublicIP)
if err != nil {
log.Fatalf("Unable to run command over SSH: %v", err)
}
}
readSSHChannel(channel)
}
// runCommand will attempt to run a command on a given machine. It will attempt
// to SSH to the machine if it is identified as being remote.
func runCommand(cmd string, ms *machine.MachineState) (retcode int) {
var err error
if machine.IsLocalMachineState(ms) {
err, retcode = runLocalCommand(cmd)
if err != nil {
fmt.Printf("Error running local command: %v\n", err)
}
} else {
err, retcode = runRemoteCommand(cmd, ms.PublicIP)
if err != nil {
fmt.Printf("Error running remote command: %v\n", err)
}
}
return
}