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# (c) Copyright IBM Corp. 2020 All Rights Reserved
#
# Author: Aman Kumar Sinha <amansi26@in.ibm.com>
#
# This file is part of cloud-init. See LICENSE file for license information.
"""Reset RMC: Reset rsct node id"""


import os
from logging import Logger

from cloudinit import log as logging
from cloudinit import subp, util
from cloudinit.cloud import Cloud
from cloudinit.config import Config
from cloudinit.config.schema import MetaSchema
from cloudinit.distros import ALL_DISTROS
from cloudinit.settings import PER_INSTANCE

MODULE_DESCRIPTION = """\
Reset RMC module is IBM PowerVM Hypervisor specific

Reliable Scalable Cluster Technology (RSCT) is a set of software components,
that  together provide a comprehensive clustering environment (RAS features)
for IBM PowerVM based virtual machines. RSCT includes the Resource monitoring
and control (RMC) subsystem. RMC is a generalized framework used for managing,
monitoring, and manipulating resources. RMC runs as a daemon process on
individual machines and needs creation of unique node id and restarts
during VM boot.
More details refer
https://www.ibm.com/support/knowledgecenter/en/SGVKBA_3.2/admin/bl503_ovrv.htm

This module handles
- creation of the unique RSCT node id to every instance/virtual machine
  and ensure once set, it isn't changed subsequently by cloud-init.
  In order to do so, it restarts RSCT service.

Prerequisite of using this module is to install RSCT packages.
"""

meta: MetaSchema = {
    "id": "cc_reset_rmc",
    "name": "Reset RMC",
    "title": "reset rsct node id",
    "description": MODULE_DESCRIPTION,
    "distros": [ALL_DISTROS],
    "frequency": PER_INSTANCE,
    "examples": [],
    "activate_by_schema_keys": [],
}

# This module is undocumented in our schema docs
__doc__ = ""

# RMCCTRL is expected to be in system PATH (/opt/rsct/bin)
# The symlink for RMCCTRL and RECFGCT are
# /usr/sbin/rsct/bin/rmcctrl and
# /usr/sbin/rsct/install/bin/recfgct respectively.
RSCT_PATH = "/opt/rsct/install/bin"
RMCCTRL = "rmcctrl"
RECFGCT = "recfgct"

LOG = logging.getLogger(__name__)

NODE_ID_FILE = "/etc/ct_node_id"


def handle(
    name: str, cfg: Config, cloud: Cloud, log: Logger, args: list
) -> None:
    # Ensuring node id has to be generated only once during first boot
    if cloud.datasource.platform_type == "none":
        LOG.debug("Skipping creation of new ct_node_id node")
        return

    if not os.path.isdir(RSCT_PATH):
        LOG.debug("module disabled, RSCT_PATH not present")
        return

    orig_path = os.environ.get("PATH")
    try:
        add_path(orig_path)
        reset_rmc()
    finally:
        if orig_path:
            os.environ["PATH"] = orig_path
        else:
            del os.environ["PATH"]


def reconfigure_rsct_subsystems():
    # Reconfigure the RSCT subsystems, which includes removing all RSCT data
    # under the /var/ct directory, generating a new node ID, and making it
    # appear as if the RSCT components were just installed
    try:
        out = subp.subp([RECFGCT])[0]
        LOG.debug(out.strip())
        return out
    except subp.ProcessExecutionError:
        util.logexc(LOG, "Failed to reconfigure the RSCT subsystems.")
        raise


def get_node_id():
    try:
        fp = util.load_file(NODE_ID_FILE)
        node_id = fp.split("\n")[0]
        return node_id
    except Exception:
        util.logexc(LOG, "Failed to get node ID from file %s." % NODE_ID_FILE)
        raise


def add_path(orig_path):
    # Adding the RSCT_PATH to env standard path
    # So thet cloud init automatically find and
    # run RECFGCT to create new node_id.
    suff = ":" + orig_path if orig_path else ""
    os.environ["PATH"] = RSCT_PATH + suff
    return os.environ["PATH"]


def rmcctrl():
    # Stop the RMC subsystem and all resource managers so that we can make
    # some changes to it
    try:
        return subp.subp([RMCCTRL, "-z"])
    except Exception:
        util.logexc(LOG, "Failed to stop the RMC subsystem.")
        raise


def reset_rmc():
    LOG.debug("Attempting to reset RMC.")

    node_id_before = get_node_id()
    LOG.debug("Node ID at beginning of module: %s", node_id_before)

    # Stop the RMC subsystem and all resource managers so that we can make
    # some changes to it
    rmcctrl()
    reconfigure_rsct_subsystems()

    node_id_after = get_node_id()
    LOG.debug("Node ID at end of module: %s", node_id_after)

    # Check if new node ID is generated or not
    # by comparing old and new node ID
    if node_id_after == node_id_before:
        msg = "New node ID did not get generated."
        LOG.error(msg)
        raise Exception(msg)

Filemanager

Name Type Size Permission Actions
__pycache__ Folder 0755
schemas Folder 0755
__init__.py File 14 B 0644
cc_ansible.py File 8.37 KB 0644
cc_apk_configure.py File 5.75 KB 0644
cc_apt_configure.py File 32.46 KB 0644
cc_apt_pipelining.py File 2.82 KB 0644
cc_bootcmd.py File 2.87 KB 0644
cc_byobu.py File 3.67 KB 0644
cc_ca_certs.py File 8.06 KB 0644
cc_chef.py File 13.79 KB 0644
cc_disable_ec2_metadata.py File 2.04 KB 0644
cc_disk_setup.py File 32.34 KB 0644
cc_fan.py File 3.11 KB 0644
cc_final_message.py File 3.41 KB 0644
cc_growpart.py File 19.42 KB 0644
cc_grub_dpkg.py File 5.49 KB 0644
cc_install_hotplug.py File 3.81 KB 0644
cc_keyboard.py File 2.08 KB 0644
cc_keys_to_console.py File 3.63 KB 0644
cc_landscape.py File 4.86 KB 0644
cc_locale.py File 1.88 KB 0644
cc_lxd.py File 17.96 KB 0644
cc_mcollective.py File 6.2 KB 0644
cc_migrator.py File 3.51 KB 0644
cc_mounts.py File 19.03 KB 0644
cc_ntp.py File 19.7 KB 0644
cc_package_update_upgrade_install.py File 4.42 KB 0644
cc_phone_home.py File 5.5 KB 0644
cc_power_state_change.py File 7.65 KB 0644
cc_puppet.py File 13.74 KB 0644
cc_refresh_rmc_and_interface.py File 5.48 KB 0644
cc_reset_rmc.py File 4.53 KB 0644
cc_resizefs.py File 10.56 KB 0644
cc_resolv_conf.py File 5.01 KB 0644
cc_rh_subscription.py File 17.05 KB 0644
cc_rightscale_userdata.py File 4.3 KB 0644
cc_rsyslog.py File 9.77 KB 0644
cc_runcmd.py File 2.92 KB 0644
cc_salt_minion.py File 5.54 KB 0644
cc_scripts_per_boot.py File 1.68 KB 0644
cc_scripts_per_instance.py File 1.83 KB 0644
cc_scripts_per_once.py File 1.78 KB 0644
cc_scripts_user.py File 1.87 KB 0644
cc_scripts_vendor.py File 2.31 KB 0644
cc_seed_random.py File 4.81 KB 0644
cc_set_hostname.py File 4.89 KB 0644
cc_set_passwords.py File 11.05 KB 0644
cc_snap.py File 6.39 KB 0644
cc_spacewalk.py File 3.52 KB 0644
cc_ssh.py File 14.03 KB 0644
cc_ssh_authkey_fingerprints.py File 4.24 KB 0644
cc_ssh_import_id.py File 5.82 KB 0644
cc_timezone.py File 1.44 KB 0644
cc_ubuntu_advantage.py File 16.88 KB 0644
cc_ubuntu_autoinstall.py File 4.56 KB 0644
cc_ubuntu_drivers.py File 4.63 KB 0644
cc_update_etc_hosts.py File 5.11 KB 0644
cc_update_hostname.py File 3.63 KB 0644
cc_users_groups.py File 7.6 KB 0644
cc_wireguard.py File 9.28 KB 0644
cc_write_files.py File 6.75 KB 0644
cc_write_files_deferred.py File 1.68 KB 0644
cc_yum_add_repo.py File 7.47 KB 0644
cc_zypper_add_repo.py File 6.68 KB 0644
modules.py File 11.43 KB 0644
schema.py File 43.14 KB 0644