def main():
"""Run the script."""
script_name = os.path.basename(__file__)
args = parse_args()
user = lib.get_running_user()
phab_client = lib.get_phabricator_client()
is_valid_host = lib.is_hostname_valid(args.host)
actions = []
if not is_valid_host and not args.force:
logger.error(
"{host} is not a valid hostname. Aborting.".format(host=args.host))
return 1
# Remove from Puppet and PuppetDB
lib.puppet_remove_host(args.host)
actions += ['Revoked Puppet certificate', 'Removed from PuppetDB']
# Downtime on Icinga both the host and the mgmt host, they will be removed by Puppet
if is_valid_host:
try:
lib.icinga_downtime(args.host,
user,
args.phab_task_id,
title=script_name)
actions.append('Downtimed host on Icinga')
except RuntimeError:
actions.append(
'Skipped downtime host on Icinga (likely already removed)')
mgmts = lib.get_mgmts([args.host])
try:
lib.icinga_downtime(mgmts[args.host],
user,
args.phab_task_id,
title=script_name)
actions.append('Downtimed mgmt interface on Icinga')
except RuntimeError:
actions.append(
'Skipped downtime mgmt interface on Icinga (likely already removed)'
)
# Remove from DebMonitor
lib.debmonitor_remove_host(args.host)
actions.append('Removed from DebMonitor')
message = (
'{script} was executed by {user} for {host} and performed the following actions:\n'
'- {actions}').format(script=script_name,
user=user,
host=args.host,
actions='\n- '.join(actions))
lib.phabricator_task_update(phab_client, args.phab_task_id, message)
return 0
def main():
"""Downtime a single host on Icinga."""
args = parse_args()
user = lib.get_running_user()
if args.debug:
logger.setLevel(logging.DEBUG)
if args.sleep:
lib.print_line('Sleeping for {s} seconds'.format(s=args.sleep),
host=args.host)
time.sleep(args.sleep)
lib.print_line('Running Puppet on the Icinga server', host=args.host)
try:
if args.debug:
lib.run_puppet([lib.resolve_dns(lib.ICINGA_DOMAIN, 'CNAME')],
no_raise=True)
lib.icinga_downtime(args.host,
user,
args.phab_task_id,
title='wmf-downtime-host')
else:
# This is needed due to a bug in tqdm and a limitation in Cumin
with open(os.devnull, 'w', 1) as cumin_output:
stderr = sys.stderr
stdout = sys.stdout
sys.stderr = cumin_output
sys.stdout = cumin_output
lib.run_puppet([lib.resolve_dns(lib.ICINGA_DOMAIN, 'CNAME')],
no_raise=True)
lib.icinga_downtime(args.host,
user,
args.phab_task_id,
title='wmf-downtime-host')
retcode = 0
except BaseException as e:
message = 'Unable to run wmf-downtime-host'
lib.print_line('{message}: {error}'.format(message=message, error=e),
host=args.host)
logger.exception(message)
retcode = 2
finally:
if not args.debug:
sys.stderr = stderr
sys.stdout = stdout
return retcode
def run(args, user, log_path):
"""Run the WMF auto reimage according to command line arguments.
Arguments:
args -- parsed command line arguments
user -- the user that launched the script, for auditing purposes
log_path -- the path of the logfile
"""
previous = None # Previous state in conftool
rename_from = None # In case of host rename, hold the previous hostname
# Validate hosts have a signed Puppet certificate
if not args.new:
lib.validate_hosts([args.host], no_raise=args.no_verify)
# Set Icinga downtime
if not args.new and not args.no_downtime:
lib.icinga_downtime(args.host, user, args.phab_task_id)
# Depool via conftool
if args.conftool and not args.new:
previous = lib.conftool_depool(args.host, pooled=args.conftool_value)
lib.print_line('Waiting 3 minutes to let the host drain',
host=args.host)
time.sleep(180)
if args.no_pxe:
lib.print_line('Skipping PXE reboot', host=args.host)
if (not lib.validate_hosts([args.host], no_raise=True)
and lib.puppet_check_cert_to_sign(args.host) == 1):
# There is no signed or pending signing certificate for the host
lib.puppet_generate_cert(args.host)
else:
lib.puppet_remove_host(args.host) # Cleanup Puppet
# Reboot into PXE mode to start the reimage
lib.set_pxe_boot(args.host, args.mgmt)
status = lib.ipmitool_command(args.mgmt,
['chassis', 'power', 'status'])
if status.startswith('Chassis Power is off'):
lib.print_line('Current power status is off, powering on',
host=args.host)
ipmi_command = ['chassis', 'power', 'on']
else:
lib.print_line('Power cycling', host=args.host)
ipmi_command = ['chassis', 'power', 'cycle']
lib.print_line(lib.ipmitool_command(args.mgmt,
ipmi_command).rstrip('\n'),
host=args.host)
# If the host is renamed, swap the hostnames now
if args.rename is not None:
rename_from = args.host
args.host = args.rename
args.mgmt = args.rename_mgmt
# Wait that the host is booting into the installer using Cumin's direct backend
lib.wait_reboot(args.host,
start=datetime.utcnow(),
installer_key=True,
debian_installer=True)
# Wait for the reboot into the new system
time.sleep(
30
) # Avoid race conditions, the host is in the d-i, need to wait anyway
lib.wait_reboot(args.host, start=datetime.utcnow(), installer_key=True)
# Generate the Puppet certificate and signing request
if lib.detect_init_system(args.host) == 'systemd':
lib.puppet_generate_cert(args.host)
# Sign the new Puppet certificate
if lib.puppet_wait_cert_and_sign(args.host):
if args.mask: # Mask systemd services
lib.mask_systemd_services(args.host, args.mask)
lib.puppet_first_run(args.host)
# Ensure the host is in Icinga
lib.run_puppet([lib.resolve_dns(lib.ICINGA_DOMAIN, 'CNAME')],
no_raise=True)
lib.icinga_downtime(args.host, user, args.phab_task_id)
lib.check_bios_bootparams(args.host, args.mgmt)
# Issue a reboot and wait for it and also for Puppet to complete
if not args.no_reboot:
reboot_time = datetime.utcnow()
# Ensure the host is in the known hosts
lib.run_puppet([socket.getfqdn()], no_raise=True)
lib.reboot_host(args.host)
boot_time = datetime.utcnow()
lib.wait_reboot(args.host, start=reboot_time)
lib.wait_puppet_run(args.host, start=boot_time)
# Run Apache fast test
if args.apache:
lib.run_apache_fast_test(args.host)
# The unmask is *not* done automatically, the commands to unmask are printed and logged
if args.mask:
lib.print_unmask_message(args.host, args.mask)
# The repool is *not* done automatically, the command to repool is printed and logged
if args.conftool:
lib.print_repool_message(previous,
rename_from=rename_from,
rename_to=args.rename)
lib.print_line('Reimage completed', host=args.host)
def run(args, user, log_path):
"""Run the WMF auto reimage according to command line arguments.
Arguments:
args -- parsed command line arguments
user -- the user that launched the script, for auditing purposes
log_path -- the path of the logfile
"""
previous = None # Previous state in conftool
rename_from = None # In case of host rename, hold the previous hostname
cert_fingerprint = None
# Validate hosts have a signed Puppet certificate
if not args.new:
lib.validate_hosts([args.host], no_raise=args.no_verify)
# Set Icinga downtime
if not args.new and not args.no_downtime:
lib.icinga_downtime(args.host, user, args.phab_task_id)
# Depool via conftool
if args.conftool and not args.new:
previous = lib.conftool_depool(args.host, pooled=args.conftool_value)
lib.print_line('Waiting 3 minutes to let the host drain',
host=args.host)
time.sleep(180)
if args.no_pxe:
lib.print_line('Skipping PXE reboot', host=args.host)
if not lib.validate_hosts([args.host], no_raise=True):
# There is no valid cert for the host, remove local cert and re-generate it
lib.puppet_remove_local_cert(args.host, installer=True)
ret = lib.puppet_check_cert_to_sign(args.host, lib.CERT_DESTROY)
if ret != 1:
raise RuntimeError((
'There was an error checking the certificate. puppet_check_cert_to_sign() '
'should have returned 1, got {ret} instead').format(
ret=ret))
cert_fingerprint = lib.puppet_generate_cert(args.host)
else:
lib.puppet_remove_host(args.host) # Cleanup Puppet
lib.debmonitor_remove_host(args.host)
# Reboot into PXE mode to start the reimage
lib.set_pxe_boot(args.host, args.mgmt)
status = lib.ipmitool_command(args.mgmt,
['chassis', 'power', 'status'])
if status.startswith('Chassis Power is off'):
lib.print_line('Current power status is off, powering on',
host=args.host)
ipmi_command = ['chassis', 'power', 'on']
else:
lib.print_line('Power cycling', host=args.host)
ipmi_command = ['chassis', 'power', 'cycle']
lib.print_line(lib.ipmitool_command(args.mgmt,
ipmi_command).rstrip('\n'),
host=args.host)
# If the host is renamed, swap the hostnames now
if args.rename is not None:
rename_from = args.host
args.host = args.rename
args.mgmt = args.rename_mgmt
# Wait that the host is booting into the installer using Cumin's direct backend
lib.wait_reboot(args.host,
start=datetime.utcnow(),
installer_key=True,
debian_installer=True)
# Wait for the reboot into the new system
time.sleep(
30
) # Avoid race conditions, the host is in the d-i, need to wait anyway
lib.wait_reboot(args.host, start=datetime.utcnow(), installer_key=True)
# Generate the Puppet certificate and signing request
cert_fingerprint = lib.puppet_generate_cert(args.host)
# Sign the new Puppet certificate
if lib.puppet_wait_cert_and_sign(args.host, cert_fingerprint):
if args.mask: # Mask systemd services
lib.mask_systemd_services(args.host, args.mask)
# Downtime the host on Icinga with delay to give time to compile the Puppet catalog
# and export its resources
downtime_debug = ''
if args.debug:
downtime_debug = '-v '
downtime_command = (
'/bin/sleep 120 && /usr/bin/cookbook {verbose}sre.hosts.downtime '
'--force-puppet -H 2 -r REIMAGE {host}').format(
verbose=downtime_debug, host=args.host)
downtime = subprocess.Popen(downtime_command, shell=True)
lib.print_line('Scheduled delayed downtime on Icinga', host=args.host)
lib.puppet_first_run(args.host)
try:
downtime.wait(timeout=180)
downtime_success = (downtime.returncode == 0)
downtime_message = 'returned {ret}'.format(ret=downtime.returncode)
except subprocess.TimeoutExpired:
downtime_success = False
downtime_message = 'timed out'
if not downtime_success:
lib.print_line((
'WARNING: failed to downtime host on Icinga, wmf-downtime-host '
'{msg}').format(msg=downtime_message))
lib.check_bios_bootparams(args.host, args.mgmt)
# Issue a reboot and wait for it and also for Puppet to complete
if not args.no_reboot:
reboot_time = datetime.utcnow()
# Ensure the host is in the known hosts
lib.run_puppet([socket.getfqdn()], no_raise=True)
lib.reboot_host(args.host)
boot_time = datetime.utcnow()
lib.wait_reboot(args.host, start=reboot_time)
lib.wait_puppet_run(args.host, start=boot_time)
# Run httpbb
if args.apache:
lib.run_httpbb(args.host)
# The unmask is *not* done automatically, the commands to unmask are printed and logged
if args.mask:
lib.print_unmask_message(args.host, args.mask)
# The repool is *not* done automatically, the command to repool is printed and logged
if args.conftool:
lib.print_repool_message(previous,
rename_from=rename_from,
rename_to=args.rename)
lib.print_line('Reimage completed', host=args.host)