How to use the execo.action.Remote function in execo

def clean_logs(self):
        """Remove all Hive logs."""

        logger.info("Cleaning logs")

        restart = False
        if self.running:
            logger.warn("The cluster needs to be stopped before cleaning.")
            self.stop()
            restart = True

        action = Remote("rm -rf " + self.logs_dir + "/* ",
                        self.hosts)
        action.run()

        if restart:
            self.start()

def clean_logs(self):
        """Remove all Spark logs."""

        logger.info("Cleaning logs")

        restart = False
        if self.running:
            logger.warn("The cluster needs to be stopped before cleaning.")
            self.stop()
            restart = True

        action = Remote("rm -rf " + self.logs_dir + "/* " +
                                    self.work_dir + "/*",
                        self.hosts)
        action.run()

        if restart:
            self.start()

def _get_conf_files(self, host):

        action = Remote("ls " + self.conf_dir + "/*.xml", [host])
        action.run()
        output = action.processes[0].stdout

        remote_conf_files = []
        for f in output.split():
            remote_conf_files.append(os.path.join(self.conf_dir, f))

        tmp_dir = "/tmp/mliroz_temp_hadoop/"
        if not os.path.exists(tmp_dir):
            os.makedirs(tmp_dir)

        action = Get([host], remote_conf_files, tmp_dir)
        action.run()

        temp_conf_files = [os.path.join(tmp_dir, f) for f in
                           os.listdir(tmp_dir)]

def clean_data(self):
        """Remove all data created by Hadoop (including filesystem)."""

        if self.running:
            logger.warn("The cluster needs to be stopped before cleaning.")
            self.stop()

        logger.info("Cleaning hadoop data")

        restart = False
        if self.running:
            self.stop()
            restart = True

        action = Remote("rm -rf " + self.hadoop_temp_dir + " /tmp/hadoop-" +
                        getpass.getuser() + "-*", self.hosts)
        action.run()

        if restart:
            self.start()

self.hc.execute("fs -mkdir -p " + self.evs_log_dir)

        # 3. Specify environment variables
        env_file = self.conf_dir + "/spark-env.sh"

        command = "cat >> " + env_file + " << EOF\n"
        command += "JAVA_HOME=" + self.java_home + "\n"
        command += "SPARK_LOG_DIR=" + self.logs_dir + "\n"
        if self.hc:
            command += "HADOOP_CONF_DIR=" + self.hc.conf_dir + "\n"
        if self.mode == YARN_MODE:
            command += "YARN_CONF_DIR=" + self.hc.conf_dir + "\n"
        command += "EOF\n"
        command += "echo SPARK_PUBLIC_DNS=$(hostname) >> " + env_file
        command += " && chmod +x " + env_file
        action = Remote(command, self.hosts)
        action.run()

        # 4. Generate initial configuration
        self._initialize_conf()

def bootstrap(self, tar_file):

        # 1. Remove used dirs if existing
        action = Remote("rm -rf " + self.base_dir, self.hc.hosts)
        action.run()
        action = Remote("rm -rf " + self.conf_dir, self.hc.hosts)
        action.run()

        # 1. Copy Mahout tar file and uncompress
        logger.info("Copy " + tar_file + " to hosts and uncompress")
        action = Put(self.hc.hosts, [tar_file], "/tmp")
        action.run()
        action = Remote(
            "tar xf /tmp/" + os.path.basename(tar_file) + " -C /tmp",
            self.hc.hosts)
        action.run()

        # 2. Move installation to base dir
        logger.info("Create installation directories")
        action = Remote(
            "mv /tmp/" +
            os.path.basename(tar_file).replace(".tar.gz", "") + " " +

self.hosts)
        chmods = TaktukRemote("chmod g+w " + self.base_dir +
                              " && chmod g+w " + self.conf_dir +
                              " && chmod g+w " + self.warehouse_dir,
                              self.hosts)
        SequentialActions([mv_base_dir, mkdirs, chmods]).run()

        # 3. Specify environment variables
        command = "cat >> " + self.conf_dir + "/hive-env.sh << EOF\n"
        command += "JAVA_HOME=" + self.java_home + "\n"
        command += "HIVE_HOME=" + self.base_dir + "\n"
        command += "HIVE_CONF_DIR=" + self.conf_dir + "\n"
        command += "HADOOP_HOME=" + self.hc.base_dir + "\n"
        command += "EOF\n"
        command += "chmod +x " + self.conf_dir + "/hive-env.sh"
        action = Remote(command, self.hosts)
        action.run()

def clean_history(self):
        """Remove history."""

        logger.info("Cleaning history")

        restart = False
        if self.running:
            logger.warn("The cluster needs to be stopped before cleaning.")
            self.stop()
            restart = True

        action = Remote("rm -rf " + self.logs_dir + "/history",
                        [self.master])
        action.run()

        if restart:
            self.start()