-#!/usr/bin/python2
-
+#!/usr/bin/python
+#
# Copyright (c) 2003 Intel Corporation
# All rights reserved.
#
# Copyright (c) 2004-2006 The Trustees of Princeton University
# All rights reserved.
+from __future__ import print_function
+
import os
from Exceptions import *
import utils
-import compatibility
-message= \
+warning_message = \
"""
---------------------------------------------------------
This machine has entered a temporary debug state, so
---------------------------------------------------------
"""
+# this can be invoked
+# either at the end of the bm logic, because something failed (last_resort = True)
+# and/or it can be invoked as a fallback very early in the bootmanager logic,
+# so we can reach the node regardless of what happens (e.g. bm sometimes hangs)
+
+def Run(vars, log, last_resort = True):
-def Run( vars, log ):
"""
Bring up sshd inside the boot cd environment for debug purposes.
Expect the following variables in vars to be set:
BM_SOURCE_DIR The source dir for the boot manager sources that
- we are currently running from
- BOOT_CD_VERSION A tuple of the current bootcd version
+ we are currently running from
"""
- log.write( "\n\nStep: Starting debug mode.\n" )
+ if last_resort:
+ message = "Starting debug mode"
+ else:
+ message = "Starting fallback sshd"
+
+
+ log.write("\n\nStep: %s.\n"%message)
# make sure we have the variables we need
try:
- BM_SOURCE_DIR= vars["BM_SOURCE_DIR"]
+ BM_SOURCE_DIR = vars["BM_SOURCE_DIR"]
if BM_SOURCE_DIR == "":
raise ValueError, "BM_SOURCE_DIR"
- BOOT_CD_VERSION= vars["BOOT_CD_VERSION"]
- if BOOT_CD_VERSION == "":
- raise ValueError, "BOOT_CD_VERSION"
-
except KeyError, var:
raise BootManagerException, "Missing variable in vars: %s\n" % var
except ValueError, var:
raise BootManagerException, "Variable in vars, shouldn't be: %s\n" % var
-
- log.write( "Starting debug environment\n" )
-
- ssh_source_files= "%s/debug_files/" % BM_SOURCE_DIR
- ssh_dir= "/etc/ssh/"
- ssh_home= "/root/.ssh"
- cancel_boot_flag= "/tmp/CANCEL_BOOT"
- sshd_started_flag= "/tmp/SSHD_RUNNING"
+ # constants
+ ssh_source_files = "%s/debug_files/" % BM_SOURCE_DIR
+ ssh_dir = "/etc/ssh/"
+ key_gen_prog = "ssh-keygen"
+ ssh_home = "/root/.ssh"
+ cancel_boot_flag = "/tmp/CANCEL_BOOT"
+ sshd_started_flag = "/tmp/SSHD_RUNNING"
+
+ # pre-sshd
+ pre_sshd_script = os.path.join(ssh_source_files, "pre-sshd")
+ if os.path.exists(pre_sshd_script):
+ utils.sysexec_noerr(pre_sshd_script, log)
- sshd_started= 0
- try:
- os.stat(sshd_started_flag)
- sshd_started= 1
- except OSError, e:
- pass
-
- if not sshd_started:
- log.write( "Creating ssh host keys\n" )
-
- utils.makedirs( ssh_dir )
- utils.sysexec( "ssh-keygen -t rsa1 -b 1024 -f %s/ssh_host_key -N ''" %
- ssh_dir, log )
- utils.sysexec( "ssh-keygen -t rsa -f %s/ssh_host_rsa_key -N ''" %
- ssh_dir, log )
- utils.sysexec( "ssh-keygen -d -f %s/ssh_host_dsa_key -N ''" %
- ssh_dir, log )
-
- if BOOT_CD_VERSION[0] == 3:
- utils.sysexec( "cp -f %s/sshd_config_v3 %s/sshd_config" %
- (ssh_source_files,ssh_dir), log )
- else:
- utils.sysexec( "cp -f %s/sshd_config_v2 %s/sshd_config" %
- (ssh_source_files,ssh_dir), log )
- else:
- log.write( "ssh host keys already created\n" )
-
-
- # always update the key, may have change in this instance of the bootmanager
- log.write( "Installing debug ssh key for root user\n" )
+ # create host keys if needed
+ if not os.path.isdir (ssh_dir):
+ utils.makedirs (ssh_dir)
+
+ # original code used to specify -b 1024 for the rsa1 key
+ key_specs = [
+ ("/etc/ssh/ssh_host_key", 'rsa1', "SSH1 RSA"),
+ ("/etc/ssh/ssh_host_rsa_key", 'rsa', "SSH2 RSA"),
+ ("/etc/ssh/ssh_host_dsa_key", 'dsa', "SSH2 DSA"),
+ ]
+
+ for key_file, key_type, label in key_specs:
+ if not os.path.exists(key_file):
+ log.write("Creating {} host key {}\n".format(label, key_file))
+ utils.sysexec("{} -q -t {} -f {} -C '' -N ''"\
+ .format(key_gen_prog, key_type, key_file), log)
+ utils.sysexec("chmod 600 {}".format(key_file), log)
+ utils.sysexec("chmod 644 {}.pub".format(key_file), log)
+
+ # (over)write sshd config
+ utils.sysexec("cp -f {}/sshd_config {}/sshd_config".format(ssh_source_files, ssh_dir), log)
- utils.makedirs( ssh_home )
- utils.sysexec( "cp -f %s/debug_root_ssh_key %s/authorized_keys" %
- (ssh_source_files,ssh_home), log )
- utils.sysexec( "chmod 700 %s" % ssh_home, log )
- utils.sysexec( "chmod 600 %s/authorized_keys" % ssh_home, log )
-
- if not sshd_started:
- log.write( "Starting sshd\n" )
-
- if BOOT_CD_VERSION[0] == 2:
- utils.sysexec( "/usr/sbin/sshd", log )
- else:
- utils.sysexec( "service sshd start", log )
-
+ ### xxx ### xxx ### xxx ### xxx ### xxx
+
+ # always update the key, may have changed in this instance of the bootmanager
+ log.write("Installing debug ssh key for root user\n")
+ if not os.path.isdir (ssh_home):
+ utils.makedirs(ssh_home)
+ utils.sysexec("cp -f {}/debug_root_ssh_key {}/authorized_keys".format(ssh_source_files, ssh_home), log)
+ utils.sysexec("chmod 700 {}".format(ssh_home), log)
+ utils.sysexec("chmod 600 {}/authorized_keys".format(ssh_home), log)
+
+ # start sshd
+ if not os.path.isfile(sshd_started_flag):
+ log.write("Starting sshd\n")
+ utils.sysexec("service sshd start", log)
# flag that ssh is running
- utils.sysexec( "touch %s" % sshd_started_flag, log )
+ utils.sysexec("touch {}".format(sshd_started_flag), log)
else:
- log.write( "sshd already running\n" )
+ # it is expected that sshd is already running when last_resort==True
+ if not last_resort:
+ log.write("sshd is already running\n")
+ if last_resort:
+ # this will make the initial script stop requesting scripts from PLC
+ utils.sysexec("touch {}".format(cancel_boot_flag), log)
- # for ease of use, setup lvm on 2.x cds
- if BOOT_CD_VERSION[0] == 2:
- compatibility.setup_lvm_2x_cd(vars,log)
-
-
- # this will make the initial script stop requesting scripts from PLC
- utils.sysexec( "touch %s" % cancel_boot_flag, log )
-
- print message
+ if last_resort:
+ print(warning_message)
return
-
git://git.onelab.eu / bootmanager.git / blobdiff