source/steps/InstallWriteConfig.py

   1 #!/usr/bin/python
   2 #
   3 # Copyright (c) 2003 Intel Corporation
   4 # All rights reserved.
   5 #
   6 # Copyright (c) 2004-2006 The Trustees of Princeton University
   7 # All rights reserved.
   8 # expected /proc/partitions format
   9
  10 import os
  11 import os.path
  12
  13 from Exceptions import *
  14 import utils
  15 import BootAPI
  16 import ModelOptions
  17
  18 def Run(vars, log):
  19
  20     """
  21     Writes out the following configuration files for the node:
  22     /etc/fstab
  23     /etc/resolv.conf (if applicable)
  24     /etc/ssh/ssh_host_key
  25     /etc/ssh/ssh_host_rsa_key
  26     /etc/ssh/ssh_host_dsa_key
  27
  28     Expect the following variables from the store:
  29     VERSION                 the version of the install
  30     SYSIMG_PATH             the path where the system image will be mounted
  31                             (always starts with TEMP_PATH)
  32     PARTITIONS              dictionary of generic part. types (root/swap)
  33                             and their associated devices.
  34     PLCONF_DIR              The directory to store the configuration file in
  35     INTERFACE_SETTINGS  A dictionary of the values from the network
  36                                 configuration file
  37     Sets the following variables:
  38     None
  39
  40     """
  41
  42     log.write( "\n\nStep: Install: Writing configuration files.\n")
  43
  44     # make sure we have the variables we need
  45     try:
  46         VERSION = vars["VERSION"]
  47         if VERSION == "":
  48             raise ValueError("VERSION")
  49
  50         SYSIMG_PATH = vars["SYSIMG_PATH"]
  51         if SYSIMG_PATH == "":
  52             raise ValueError("SYSIMG_PATH")
  53
  54         PARTITIONS = vars["PARTITIONS"]
  55         if PARTITIONS == None:
  56             raise ValueError("PARTITIONS")
  57
  58         PLCONF_DIR = vars["PLCONF_DIR"]
  59         if PLCONF_DIR == "":
  60             raise ValueError("PLCONF_DIR")
  61
  62         INTERFACE_SETTINGS = vars["INTERFACE_SETTINGS"]
  63         if INTERFACE_SETTINGS == "":
  64             raise ValueError("INTERFACE_SETTINGS")
  65
  66     except KeyError, var:
  67         raise BootManagerException("Missing variable in vars: {}\n".format(var))
  68     except ValueError, var:
  69         raise BootManagerException("Variable in vars, shouldn't be: {}\n".format(var))
  70
  71     log.write("Setting local time to UTC\n")
  72     utils.sysexec_chroot(SYSIMG_PATH,
  73         "ln -sf /usr/share/zoneinfo/UTC /etc/localtime", log)
  74
  75     log.write("Creating system directory {}\n".format(PLCONF_DIR))
  76     if not utils.makedirs("{}/{}".format(SYSIMG_PATH, PLCONF_DIR)):
  77         log.write("Unable to create directory\n")
  78         return 0
  79
  80     log.write("Writing system /etc/fstab\n")
  81     fstab = file("{}/etc/fstab".format(SYSIMG_PATH), "w")
  82     fstab.write("{}           none        swap      sw        0 0\n"\
  83                 .format(PARTITIONS["mapper-swap"]))
  84     fstab.write("{}           /           ext3      defaults  1 1\n"\
  85                 .format(PARTITIONS["mapper-root"]))
  86     if (vars['ONE_PARTITION'] != '1'):
  87         if vars['virt'] == 'vs':
  88             fstab.write("{}           /vservers   ext3      tagxid,defaults  1 2\n"\
  89                         .format(PARTITIONS["mapper-vservers"]))
  90         else:
  91             fstab.write("{}           /vservers   btrfs     defaults  1 2\n"\
  92                         .format(PARTITIONS["mapper-vservers"]))
  93     fstab.write("none         /proc       proc      defaults  0 0\n")
  94     fstab.write("none         /dev/shm    tmpfs     defaults  0 0\n")
  95     fstab.write("none         /dev/pts    devpts    defaults  0 0\n")
  96     fstab.close()
  97
  98     log.write("Writing system /etc/issue\n")
  99     issue= file("{}/etc/issue".format(SYSIMG_PATH), "w")
 100     issue.write("PlanetLab Node: \\n\n")
 101     issue.write("Kernel \\r on an \\m\n")
 102     issue.write("http://www.planet-lab.org\n\n")
 103     issue.close()
 104
 105     if (vars['ONE_PARTITION'] != '1'):
 106         log.write("Setting up authentication (non-ssh)\n")
 107         utils.sysexec_chroot(SYSIMG_PATH, "authconfig --nostart --kickstart --enablemd5 " \
 108                        "--enableshadow", log)
 109         utils.sysexec("sed -e 's/^root\:\:/root\:*\:/g' " \
 110                        "{}/etc/shadow > {}/etc/shadow.new".format(SYSIMG_PATH, SYSIMG_PATH), log)
 111         utils.sysexec_chroot(SYSIMG_PATH, "mv " \
 112                        "/etc/shadow.new /etc/shadow", log)
 113         utils.sysexec_chroot(SYSIMG_PATH, "chmod 400 /etc/shadow", log)
 114
 115     # if we are setup with dhcp, copy the current /etc/resolv.conf into
 116     # the system image so we can run programs inside that need network access
 117     method = ""
 118     try:
 119         method = vars['INTERFACE_SETTINGS']['method']
 120     except:
 121         pass
 122
 123     if method == "dhcp":
 124         utils.sysexec("cp /etc/resolv.conf {}/etc/".format(SYSIMG_PATH), log)
 125
 126     log.write("Writing node install version\n")
 127     utils.makedirs("{}/etc/planetlab".format(SYSIMG_PATH))
 128     ver = file("{}/etc/planetlab/install_version".format(SYSIMG_PATH), "w")
 129     ver.write("{}\n".format(VERSION))
 130     ver.close()
 131
 132     # for upgrades : do not overwrite already existing keys
 133     log.write("Creating ssh host keys\n")
 134     key_gen_prog = "/usr/bin/ssh-keygen"
 135
 136     key_specs = [
 137         ("/etc/ssh/ssh_host_key",     'rsa1', "SSH1 RSA"),
 138         ("/etc/ssh/ssh_host_rsa_key", 'rsa',  "SSH2 RSA"),
 139         ("/etc/ssh/ssh_host_dsa_key", 'dsa',  "SSH2 DSA"),
 140     ]
 141
 142     for key_file, key_type, label in key_specs:
 143         abs_file = "{}/{}".format(SYSIMG_PATH, key_file)
 144         if not os.path.exists(abs_file):
 145             log.write("Generating {} host key {}\n".format(label, key_file))
 146             utils.sysexec_chroot(SYSIMG_PATH, "{} -q -t {} -f {} -C '' -N ''"\
 147                                  .format(key_gen_prog, key_type, key_file), log)
 148             utils.sysexec("chmod 600 {}/{}".format(SYSIMG_PATH, key_file), log)
 149             utils.sysexec("chmod 644 {}/{}.pub".format(SYSIMG_PATH, key_file), log)
 150
 151     return 1