695 lines
24 KiB
Python
695 lines
24 KiB
Python
"""
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Copyright (c) 2014-2022 Wind River Systems, Inc.
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SPDX-License-Identifier: Apache-2.0
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"""
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import json
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import os
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import random
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import requests
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import select
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import shutil
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import socket
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import subprocess
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import sys
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import time
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from cgcs_patch import ostree_utils
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from cgcs_patch.patch_functions import configure_logging
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from cgcs_patch.patch_functions import LOG
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import cgcs_patch.config as cfg
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from cgcs_patch.base import PatchService
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from cgcs_patch.exceptions import OSTreeCommandFail
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import cgcs_patch.utils as utils
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import cgcs_patch.messages as messages
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import cgcs_patch.constants as constants
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from tsconfig.tsconfig import http_port
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from tsconfig.tsconfig import install_uuid
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from tsconfig.tsconfig import subfunctions
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from tsconfig.tsconfig import SW_VERSION
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pidfile_path = "/var/run/patch_agent.pid"
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node_is_patched_file = "/var/run/node_is_patched"
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node_is_patched_rr_file = "/var/run/node_is_patched_rr"
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patch_installing_file = "/var/run/patch_installing"
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patch_failed_file = "/var/run/patch_install_failed"
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node_is_locked_file = "/var/run/.node_locked"
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insvc_patch_scripts = "/run/patching/patch-scripts"
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insvc_patch_flags = "/run/patching/patch-flags"
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insvc_patch_restart_agent = "/run/patching/.restart.patch-agent"
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run_insvc_patch_scripts_cmd = "/usr/sbin/run-patch-scripts"
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pa = None
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http_port_real = http_port
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def setflag(fname):
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try:
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with open(fname, "w") as f:
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f.write("%d\n" % os.getpid())
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except Exception:
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LOG.exception("Failed to update %s flag", fname)
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def clearflag(fname):
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if os.path.exists(fname):
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try:
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os.remove(fname)
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except Exception:
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LOG.exception("Failed to clear %s flag", fname)
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def check_install_uuid():
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controller_install_uuid_url = "http://controller:%s/feed/rel-%s/install_uuid" % (http_port_real, SW_VERSION)
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try:
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req = requests.get(controller_install_uuid_url)
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if req.status_code != 200:
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# If we're on controller-1, controller-0 may not have the install_uuid
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# matching this release, if we're in an upgrade. If the file doesn't exist,
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# bypass this check
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if socket.gethostname() == "controller-1":
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return True
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LOG.error("Failed to get install_uuid from controller")
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return False
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except requests.ConnectionError:
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LOG.error("Failed to connect to controller")
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return False
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controller_install_uuid = str(req.text).rstrip()
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if install_uuid != controller_install_uuid:
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LOG.error("Local install_uuid=%s doesn't match controller=%s", install_uuid, controller_install_uuid)
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return False
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return True
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class PatchMessageSendLatestFeedCommit(messages.PatchMessage):
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def __init__(self):
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messages.PatchMessage.__init__(self, messages.PATCHMSG_SEND_LATEST_FEED_COMMIT)
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def decode(self, data):
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global pa
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messages.PatchMessage.decode(self, data)
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if 'latest_feed_commit' in data:
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pa.latest_feed_commit = data['latest_feed_commit']
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def encode(self):
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messages.PatchMessage.encode(self)
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def handle(self, sock, addr):
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global pa
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# Check if the node is patch current
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pa.query()
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class PatchMessageHelloAgent(messages.PatchMessage):
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def __init__(self):
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messages.PatchMessage.__init__(self, messages.PATCHMSG_HELLO_AGENT)
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self.patch_op_counter = 0
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def decode(self, data):
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messages.PatchMessage.decode(self, data)
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if 'patch_op_counter' in data:
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self.patch_op_counter = data['patch_op_counter']
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def encode(self):
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messages.PatchMessage.encode(self)
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def handle(self, sock, addr):
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# Send response
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#
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# If a user tries to do a host-install on an unlocked node,
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# without bypassing the lock check (either via in-service
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# patch or --force option), the agent will set its state
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# to Install-Rejected in order to report back the rejection.
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# However, since this should just be a transient state,
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# we don't want the client reporting the Install-Rejected
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# state indefinitely, so reset it to Idle after a minute or so.
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#
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if pa.state == constants.PATCH_AGENT_STATE_INSTALL_REJECTED:
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if os.path.exists(node_is_locked_file):
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# Node has been locked since rejected attempt. Reset the state
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pa.state = constants.PATCH_AGENT_STATE_IDLE
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elif (time.time() - pa.rejection_timestamp) > 60:
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# Rejected state for more than a minute. Reset it.
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pa.state = constants.PATCH_AGENT_STATE_IDLE
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if self.patch_op_counter > 0:
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pa.handle_patch_op_counter(self.patch_op_counter)
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resp = PatchMessageHelloAgentAck()
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resp.send(sock)
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def send(self, sock): # pylint: disable=unused-argument
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LOG.error("Should not get here")
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class PatchMessageHelloAgentAck(messages.PatchMessage):
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def __init__(self):
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messages.PatchMessage.__init__(self, messages.PATCHMSG_HELLO_AGENT_ACK)
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def encode(self):
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global pa
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messages.PatchMessage.encode(self)
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self.message['query_id'] = pa.query_id
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self.message['out_of_date'] = pa.changes
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self.message['hostname'] = socket.gethostname()
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self.message['requires_reboot'] = pa.node_is_patched
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self.message['patch_failed'] = pa.patch_failed
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self.message['sw_version'] = SW_VERSION
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self.message['state'] = pa.state
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def handle(self, sock, addr):
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LOG.error("Should not get here")
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def send(self, sock):
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global pa
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self.encode()
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message = json.dumps(self.message)
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sock.sendto(str.encode(message), (pa.controller_address, cfg.controller_port))
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class PatchMessageQueryDetailed(messages.PatchMessage):
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def __init__(self):
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messages.PatchMessage.__init__(self, messages.PATCHMSG_QUERY_DETAILED)
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def decode(self, data):
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messages.PatchMessage.decode(self, data)
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def encode(self):
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# Nothing to add to the HELLO_AGENT, so just call the super class
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messages.PatchMessage.encode(self)
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def handle(self, sock, addr):
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# Send response
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LOG.info("Handling detailed query")
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resp = PatchMessageQueryDetailedResp()
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resp.send(sock)
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def send(self, sock): # pylint: disable=unused-argument
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LOG.error("Should not get here")
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class PatchMessageQueryDetailedResp(messages.PatchMessage):
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def __init__(self):
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messages.PatchMessage.__init__(self, messages.PATCHMSG_QUERY_DETAILED_RESP)
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def encode(self):
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global pa
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messages.PatchMessage.encode(self)
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self.message['latest_sysroot_commit'] = pa.latest_sysroot_commit
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self.message['nodetype'] = cfg.nodetype
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self.message['sw_version'] = SW_VERSION
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self.message['subfunctions'] = subfunctions
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self.message['state'] = pa.state
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def handle(self, sock, addr):
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LOG.error("Should not get here")
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def send(self, sock):
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self.encode()
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message = json.dumps(self.message)
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sock.sendall(str.encode(message))
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class PatchMessageAgentInstallReq(messages.PatchMessage):
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def __init__(self):
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messages.PatchMessage.__init__(self, messages.PATCHMSG_AGENT_INSTALL_REQ)
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self.force = False
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def decode(self, data):
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messages.PatchMessage.decode(self, data)
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if 'force' in data:
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self.force = data['force']
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def encode(self):
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# Nothing to add to the HELLO_AGENT, so just call the super class
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messages.PatchMessage.encode(self)
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def handle(self, sock, addr):
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LOG.info("Handling host install request, force=%s", self.force)
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global pa
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resp = PatchMessageAgentInstallResp()
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if not os.path.exists(node_is_locked_file):
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if self.force:
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LOG.info("Installing on unlocked node, with force option")
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else:
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LOG.info("Rejecting install request on unlocked node")
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pa.state = constants.PATCH_AGENT_STATE_INSTALL_REJECTED
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pa.rejection_timestamp = time.time()
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resp.status = False
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resp.reject_reason = 'Node must be locked.'
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resp.send(sock, addr)
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return
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resp.status = pa.handle_install()
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resp.send(sock, addr)
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def send(self, sock): # pylint: disable=unused-argument
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LOG.error("Should not get here")
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class PatchMessageAgentInstallResp(messages.PatchMessage):
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def __init__(self):
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messages.PatchMessage.__init__(self, messages.PATCHMSG_AGENT_INSTALL_RESP)
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self.status = False
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self.reject_reason = None
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def encode(self):
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global pa
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messages.PatchMessage.encode(self)
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self.message['status'] = self.status
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if self.reject_reason is not None:
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self.message['reject_reason'] = self.reject_reason
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def handle(self, sock, addr):
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LOG.error("Should not get here")
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def send(self, sock, addr):
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address = (addr[0], cfg.controller_port)
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self.encode()
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message = json.dumps(self.message)
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sock.sendto(str.encode(message), address)
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# Send a hello ack to follow it
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resp = PatchMessageHelloAgentAck()
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resp.send(sock)
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class PatchAgent(PatchService):
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def __init__(self):
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PatchService.__init__(self)
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self.sock_out = None
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self.sock_in = None
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self.controller_address = None
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self.listener = None
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self.changes = False
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self.latest_feed_commit = None
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self.latest_sysroot_commit = None
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self.patch_op_counter = 0
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self.node_is_patched = os.path.exists(node_is_patched_file)
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self.node_is_patched_timestamp = 0
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self.query_id = 0
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self.state = constants.PATCH_AGENT_STATE_IDLE
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self.last_config_audit = 0
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self.rejection_timestamp = 0
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self.last_repo_revision = None
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# Check state flags
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if os.path.exists(patch_installing_file):
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# We restarted while installing. Change to failed
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setflag(patch_failed_file)
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os.remove(patch_installing_file)
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if os.path.exists(patch_failed_file):
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self.state = constants.PATCH_AGENT_STATE_INSTALL_FAILED
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self.patch_failed = os.path.exists(patch_failed_file)
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def update_config(self):
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cfg.read_config()
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if self.port != cfg.agent_port:
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self.port = cfg.agent_port
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# Loopback interface does not support multicast messaging, therefore
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# revert to using unicast messaging when configured against the
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# loopback device
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if cfg.get_mgmt_iface() == constants.LOOPBACK_INTERFACE_NAME:
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self.mcast_addr = None
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self.controller_address = cfg.get_mgmt_ip()
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else:
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self.mcast_addr = cfg.agent_mcast_group
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self.controller_address = cfg.controller_mcast_group
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def setup_tcp_socket(self):
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address_family = utils.get_management_family()
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self.listener = socket.socket(address_family, socket.SOCK_STREAM)
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self.listener.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
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self.listener.bind(('', self.port))
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self.listener.listen(2) # Allow two connections, for two controllers
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def query(self):
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""" Check current patch state """
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if not check_install_uuid():
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LOG.info("Failed install_uuid check. Skipping query")
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return False
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# Generate a unique query id
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self.query_id = random.random()
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# determine OSTREE state of the system and the patches
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self.changes = False
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active_sysroot_commit = ostree_utils.get_sysroot_latest_commit()
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self.latest_sysroot_commit = active_sysroot_commit
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self.last_repo_revision = active_sysroot_commit
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# latest_feed_commit is sent from patch controller
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# if unprovisioned (no mgmt ip) attempt to query it
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if self.latest_feed_commit is None:
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if self.sock_out is None:
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try:
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self.latest_feed_commit = ostree_utils.get_feed_latest_commit(SW_VERSION)
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except OSTreeCommandFail:
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LOG.warn("Unable to query latest feed commit")
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# latest_feed_commit will remain as None
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if self.latest_feed_commit:
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if active_sysroot_commit != self.latest_feed_commit:
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LOG.info("Active Sysroot Commit:%s does not match "
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"active controller's Feed Repo Commit: %s",
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active_sysroot_commit, self.latest_feed_commit)
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self.changes = True
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return True
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def handle_install(self, verbose_to_stdout=False, disallow_insvc_patch=False):
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#
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# The disallow_insvc_patch parameter is set when we're installing
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# the patch during init. At that time, we don't want to deal with
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# in-service patch scripts, so instead we'll treat any patch as
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# a reboot-required when this parameter is set. Rather than running
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# any scripts, the RR flag will be set, which will result in the node
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# being rebooted immediately upon completion of the installation.
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#
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LOG.info("Handling install")
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# Check the INSTALL_UUID first. If it doesn't match the active
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# controller, we don't want to install patches.
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if not check_install_uuid():
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LOG.error("Failed install_uuid check. Skipping install")
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self.patch_failed = True
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setflag(patch_failed_file)
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self.state = constants.PATCH_AGENT_STATE_INSTALL_FAILED
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# Send a hello to provide a state update
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if self.sock_out is not None:
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hello_ack = PatchMessageHelloAgentAck()
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hello_ack.send(self.sock_out)
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return False
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self.state = constants.PATCH_AGENT_STATE_INSTALLING
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setflag(patch_installing_file)
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try:
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# Create insvc patch directories
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if os.path.exists(insvc_patch_scripts):
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shutil.rmtree(insvc_patch_scripts, ignore_errors=True)
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if os.path.exists(insvc_patch_flags):
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shutil.rmtree(insvc_patch_flags, ignore_errors=True)
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os.makedirs(insvc_patch_scripts, 0o700)
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os.makedirs(insvc_patch_flags, 0o700)
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except Exception:
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LOG.exception("Failed to create in-service patch directories")
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# Send a hello to provide a state update
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if self.sock_out is not None:
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hello_ack = PatchMessageHelloAgentAck()
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hello_ack.send(self.sock_out)
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# Build up the install set
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if verbose_to_stdout:
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print("Checking for software updates...")
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self.query() # sets self.changes
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changed = False
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success = True
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if self.changes:
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try:
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# Pull changes from remote to the sysroot ostree
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# The remote value is configured inside
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# "/sysroot/ostree/repo/config" file
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ostree_utils.pull_ostree_from_remote()
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# Create a new deployment once the changes are pulled
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ostree_utils.create_deployment()
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changed = True
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except OSTreeCommandFail:
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LOG.exception("Failed to pull changes and create deployment"
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"during host-install.")
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success = False
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if changed:
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# Update the node_is_patched flag
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setflag(node_is_patched_file)
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self.node_is_patched = True
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if verbose_to_stdout:
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print("This node has been patched.")
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if os.path.exists(node_is_patched_rr_file):
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LOG.info("Reboot is required. Skipping patch-scripts")
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elif disallow_insvc_patch:
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LOG.info("Disallowing patch-scripts. Treating as reboot-required")
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setflag(node_is_patched_rr_file)
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else:
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LOG.info("Running in-service patch-scripts")
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try:
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subprocess.check_output(run_insvc_patch_scripts_cmd, stderr=subprocess.STDOUT)
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# Clear the node_is_patched flag, since we've handled it in-service
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clearflag(node_is_patched_file)
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self.node_is_patched = False
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except subprocess.CalledProcessError as e:
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LOG.exception("In-Service patch scripts failed")
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LOG.error("Command output: %s", e.output)
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success = False
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# Clear the in-service patch dirs
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if os.path.exists(insvc_patch_scripts):
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shutil.rmtree(insvc_patch_scripts, ignore_errors=True)
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if os.path.exists(insvc_patch_flags):
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shutil.rmtree(insvc_patch_flags, ignore_errors=True)
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if success:
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self.patch_failed = False
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clearflag(patch_failed_file)
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self.state = constants.PATCH_AGENT_STATE_IDLE
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else:
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# Update the patch_failed flag
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self.patch_failed = True
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setflag(patch_failed_file)
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self.state = constants.PATCH_AGENT_STATE_INSTALL_FAILED
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clearflag(patch_installing_file)
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self.query()
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if self.changes:
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LOG.warn("Installing the patch did not change the patch current status")
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# Send a hello to provide a state update
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if self.sock_out is not None:
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hello_ack = PatchMessageHelloAgentAck()
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hello_ack.send(self.sock_out)
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# Indicate if the method was successful
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# success means no change needed, or a change worked.
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return success
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def handle_patch_op_counter(self, counter):
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changed = False
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if os.path.exists(node_is_patched_file):
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# The node has been patched. Run a query if:
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# - node_is_patched didn't exist previously
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# - node_is_patched timestamp changed
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timestamp = os.path.getmtime(node_is_patched_file)
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if not self.node_is_patched:
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self.node_is_patched = True
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self.node_is_patched_timestamp = timestamp
|
|
changed = True
|
|
elif self.node_is_patched_timestamp != timestamp:
|
|
self.node_is_patched_timestamp = timestamp
|
|
changed = True
|
|
elif self.node_is_patched:
|
|
self.node_is_patched = False
|
|
self.node_is_patched_timestamp = 0
|
|
changed = True
|
|
|
|
if self.patch_op_counter < counter:
|
|
self.patch_op_counter = counter
|
|
changed = True
|
|
|
|
if changed:
|
|
rc = self.query()
|
|
if not rc:
|
|
# Query failed. Reset the op counter
|
|
self.patch_op_counter = 0
|
|
|
|
def run(self):
|
|
self.setup_socket()
|
|
|
|
while self.sock_out is None:
|
|
# Check every thirty seconds?
|
|
# Once we've got a conf file, tied into packstack,
|
|
# we'll get restarted when the file is updated,
|
|
# and this should be unnecessary.
|
|
time.sleep(30)
|
|
self.setup_socket()
|
|
|
|
self.setup_tcp_socket()
|
|
|
|
# Ok, now we've got our socket.
|
|
# Let's let the controllers know we're here
|
|
hello_ack = PatchMessageHelloAgentAck()
|
|
hello_ack.send(self.sock_out)
|
|
|
|
first_hello = True
|
|
|
|
connections = []
|
|
|
|
timeout = time.time() + 30.0
|
|
remaining = 30
|
|
|
|
while True:
|
|
inputs = [self.sock_in, self.listener] + connections
|
|
outputs = []
|
|
|
|
rlist, wlist, xlist = select.select(inputs, outputs, inputs, remaining)
|
|
|
|
remaining = int(timeout - time.time())
|
|
if remaining <= 0 or remaining > 30:
|
|
timeout = time.time() + 30.0
|
|
remaining = 30
|
|
|
|
if (len(rlist) == 0 and
|
|
len(wlist) == 0 and
|
|
len(xlist) == 0):
|
|
# Timeout hit
|
|
self.audit_socket()
|
|
continue
|
|
|
|
for s in rlist:
|
|
if s == self.listener:
|
|
conn, addr = s.accept()
|
|
connections.append(conn)
|
|
continue
|
|
|
|
data = ''
|
|
addr = None
|
|
msg = None
|
|
|
|
if s == self.sock_in:
|
|
# Receive from UDP
|
|
data, addr = s.recvfrom(1024)
|
|
else:
|
|
# Receive from TCP
|
|
while True:
|
|
try:
|
|
packet = s.recv(1024)
|
|
except socket.error:
|
|
LOG.exception("Socket error on recv")
|
|
data = ''
|
|
break
|
|
|
|
if packet:
|
|
data += packet.decode()
|
|
|
|
if data == '':
|
|
break
|
|
|
|
try:
|
|
json.loads(data)
|
|
break
|
|
except ValueError:
|
|
# Message is incomplete
|
|
continue
|
|
else:
|
|
# End of TCP message received
|
|
break
|
|
|
|
if data == '':
|
|
# Connection dropped
|
|
connections.remove(s)
|
|
s.close()
|
|
continue
|
|
|
|
msgdata = json.loads(data)
|
|
|
|
# For now, discard any messages that are not msgversion==1
|
|
if 'msgversion' in msgdata and msgdata['msgversion'] != 1:
|
|
continue
|
|
|
|
if 'msgtype' in msgdata:
|
|
if msgdata['msgtype'] == messages.PATCHMSG_HELLO_AGENT:
|
|
if first_hello:
|
|
self.query()
|
|
first_hello = False
|
|
|
|
msg = PatchMessageHelloAgent()
|
|
elif msgdata['msgtype'] == messages.PATCHMSG_QUERY_DETAILED:
|
|
msg = PatchMessageQueryDetailed()
|
|
elif msgdata['msgtype'] == messages.PATCHMSG_SEND_LATEST_FEED_COMMIT:
|
|
msg = PatchMessageSendLatestFeedCommit()
|
|
elif msgdata['msgtype'] == messages.PATCHMSG_AGENT_INSTALL_REQ:
|
|
msg = PatchMessageAgentInstallReq()
|
|
|
|
if msg is None:
|
|
msg = messages.PatchMessage()
|
|
|
|
msg.decode(msgdata)
|
|
if s == self.sock_in:
|
|
msg.handle(self.sock_out, addr)
|
|
else:
|
|
msg.handle(s, addr)
|
|
|
|
for s in xlist:
|
|
if s in connections:
|
|
connections.remove(s)
|
|
s.close()
|
|
|
|
# Check for in-service patch restart flag
|
|
if os.path.exists(insvc_patch_restart_agent):
|
|
# Make sure it's safe to restart, ie. no reqs queued
|
|
rlist, wlist, xlist = select.select(inputs, outputs, inputs, 0)
|
|
if (len(rlist) == 0 and
|
|
len(wlist) == 0 and
|
|
len(xlist) == 0):
|
|
# Restart
|
|
LOG.info("In-service patch restart flag detected. Exiting.")
|
|
os.remove(insvc_patch_restart_agent)
|
|
exit(0)
|
|
|
|
|
|
def main():
|
|
global pa
|
|
|
|
configure_logging()
|
|
|
|
cfg.read_config()
|
|
|
|
pa = PatchAgent()
|
|
pa.query()
|
|
|
|
if len(sys.argv) <= 1:
|
|
pa.run()
|
|
elif sys.argv[1] == "--install":
|
|
if not check_install_uuid():
|
|
# In certain cases, the lighttpd server could still be running using
|
|
# its default port 80, as opposed to the port configured in platform.conf
|
|
global http_port_real
|
|
LOG.info("Failed install_uuid check via http_port=%s. Trying with default port 80", http_port_real)
|
|
http_port_real = 80
|
|
|
|
pa.handle_install(verbose_to_stdout=True, disallow_insvc_patch=True)
|
|
elif sys.argv[1] == "--status":
|
|
rc = 0
|
|
if pa.changes:
|
|
rc = 1
|
|
exit(rc)
|