djbdns/files/djbdns-setup

   1 #!/bin/bash
   2 #
   3 # djbdns-setup
   4 #
   5 # Copyright (C) 2004-2006 Kalin KOZHUHAROV <kalin@thinrope.net>
   6 # The latest version of this script can be accessed at:
   7 # rsync://rsync.tar.bz/gentoo-portage-pkalin/net-dns/djbdns/files/djbdns-setup
   8 #
   9 # This program is free software; you can redistribute it and/or
  10 # modify it under the terms of the GNU General Public License
  11 # as published by the Free Software Foundation; either version 2
  12 # of the License, or (at your option) any later version.
  13
  14 # This program is distributed in the hope that it will be useful,
  15 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  16 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17 # GNU General Public License for more details.
  18 # http://www.gnu.org/copyleft/gpl.html
  19 #
  20
  21 # {{{ Rip off the ewarn code from /sbin/functions.sh
  22 WARN=$'\e[33;01m'
  23 NORMAL=$'\e[0m'
  24 ewarn() {
  25         echo -e " ${WARN}*${NORMAL} $*"
  26         return 0
  27 }
  28 # }}}
  29
  30 # {{{ global vars
  31 S_SEPARATOR="--------------------------------------------------------------------------------"
  32 D_SEPARATOR="================================================================================"
  33
  34 REQ_GROUP="nofiles"
  35 REQ_USERS="tinydns dnscache dnslog"
  36
  37 IPs[0]=""
  38 IPs[1]=""
  39 IPs[2]=""
  40 dnscache=0
  41 tinydns=1
  42 axfrdns=2
  43
  44 # global vars }}}
  45
  46 # {{{ functions
  47 check_group_users()
  48 {
  49         echo ": Checking for required group (${REQ_GROUP}) :"
  50         grep ${REQ_GROUP} /etc/group &> /dev/null
  51         if [ $? -ne 0 ]
  52         then
  53         ebegin "Adding group ${REQ_GROUP}"
  54         /usr/sbin/groupadd ${REQ_GROUP} &>/dev/null && eend 0 || eend 1
  55         fi
  56
  57         echo ": Checking for required users (${REQ_USERS}) :"
  58         for user in ${REQ_USERS};
  59         do
  60         grep ${user} /etc/passwd &> /dev/null
  61         if [ $? -ne 0 ]
  62         then
  63                 ebegin "Adding user ${user}"
  64                 /usr/sbin/useradd -d /dev/null -s /bin/false -g ${REQ_GROUP} ${user} &>/dev/null && eend 0 || eend 1
  65         fi
  66         done
  67         return 0
  68 }
  69
  70 start_services()
  71 {
  72         local services="$1"
  73
  74         echo "${SEPARATOR}"
  75         echo ": Start services :"
  76         echo
  77         echo "   Your services (${services// /, }) are ready for startup!"
  78         echo
  79         ewarn "   The following requires daemontools to be running!"
  80         local answer=""
  81         read -p "   Would you like ${services// /, } to be started and supervised by daemontools now? [Y|n]> " answer
  82         if [ "${answer}" == "Y" ] || [ "${answer}" == "" ]
  83         then
  84
  85         ebegin "Checking if daemontools are running"
  86         ps -A |grep svscanboot &>/dev/null && eend 0 || eend 1
  87
  88         ebegin "Linking services in /service"
  89         # Don't make symbolic links to / !
  90         # use ../ instead as it gives trouble in chrooted environments
  91         local fixedroot_path=`echo ${mypath} | sed -e 's#^/#../#'`
  92         for service in ${services};
  93         do
  94                 for ip in ${IPs[${service}]};
  95                 do
  96                 ln -sf ${fixedroot_path}/${service}/${ip} /service/${service}_${ip}
  97                 done
  98         done
  99
 100         eend 0
 101
 102         echo
 103         ls -l --color=auto /service/
 104         echo
 105         ebegin "Waiting 5 seconds for services to start"
 106         sleep 5 && eend 0
 107
 108         echo "${SEPARATOR}"
 109         echo ": Check services status :"
 110         echo
 111         for service in ${services};
 112         do
 113                 for ip in ${IPs[${service}]};
 114                 do
 115                 svstat /service/${service}_${ip} /service/${service}_${ip}/log
 116                 done
 117         done
 118         fi
 119         return 0
 120 }
 121
 122 tinydns_setup()
 123 {
 124         return 0
 125 }
 126
 127 axfrdns_setup()
 128 {
 129         echo "${S_SEPARATOR}"
 130         echo ": Grant access to axfrdns :"
 131         echo
 132         TCPRULES_DIR="${mypath}/axfrdns/${myip}/control"
 133         echo "   axfrdns is accessed by your secondary servers and when response cannot fit UDP packet"
 134         echo "   You have to specify which IP addresses are allowed to access it"
 135         echo "   in ${TCPRULES_DIR}/tcp.axfrdns"
 136         echo
 137         echo "   Example:"
 138         echo "     1.2.3.4 would allow the host 1.2.3.4"
 139         echo "     1.2.3.  would allow ALL hosts 1.2.3.x (like 1.2.3.4, 1.2.3.100, etc.)"
 140         ewarn "Do NOT forget the trailing dot!"
 141         echo
 142         echo "   Press Enter if you do not want to allow any access now."
 143         echo
 144
 145         sed -i -e "s#-x tcp.cdb#-x control/tcp.axfrdns.cdb#g" ${mypath}/axfrdns/${myip}/run
 146         if [ -e ${TCPRULES_DIR}/tcp.axfrdns ]
 147         then
 148                 ewarn "${TCPRULES_DIR}/tcp.axfrdns exists."
 149                 read -p "   Do you want it cleared? [y|N]: " answer
 150                 if [ "${answer}" == "y" ]
 151                 then
 152                 echo '# sample line:  1.2.3.4:allow,AXFR="heaven.af.mil/3.2.1.in-addr.arpa"' > ${TCPRULES_DIR}/tcp.axfrdns
 153                 fi
 154         fi
 155
 156         read -p "   IP to allow (press Enter to end)> " ipallow
 157
 158         while [ "$ipallow" != "" ]
 159         do
 160                 echo "${ipallow}:allow" >> ${TCPRULES_DIR}/tcp.axfrdns
 161                 read -p "   IP to allow (press Enter to end)> " ipallow
 162         done
 163         echo ":deny" >> ${TCPRULES_DIR}/tcp.axfrdns
 164
 165         echo "   Here are the tcprules created so far:"
 166         echo
 167         cat ${TCPRULES_DIR}/tcp.axfrdns
 168         echo
 169         local answer=""
 170         read -p "   Would you like ${TCPRULES_DIR}/tcp.axfrdns.cdb updated? [Y|n]: " answer
 171         if [ "${answer}" == "Y" ] || [ "${answer}" == "" ]
 172         then
 173                 ebegin "Updating ${TCPRULES_DIR}/tcp.axfrdns.cdb"
 174                 bash -c "cd ${TCPRULES_DIR} && make" && eend 0 || eend 1
 175         fi
 176         return 0
 177 }
 178
 179 dnscache_setup()
 180 {
 181         echo ": Configure forwarding :"
 182         echo
 183         echo "   dnscache can be configured to forward queries to another"
 184         echo "   DNS cache (such as the one your ISP provides) rather than"
 185         echo "   performing the lookups itself."
 186         echo
 187         echo "   To enable this forwarding-only mode (usually a good idea),"
 188         echo "   provide the IPs of the caches to forward to."
 189         echo "   To have dnscache perform the lookups itself, just press Enter."
 190         echo
 191         read -p "   forward-to IP> " myforward
 192         echo
 193         if [ "$myforward" != "" ]
 194         then
 195                 echo $myforward > ${mypath}/dnscache/${myip}/root/servers/\@
 196                 echo -n "1" > ${mypath}/dnscache/${myip}/env/FORWARDONLY
 197
 198                 read -p "   forward-to IP (press Enter to end)> " myforward
 199                 while [ "$myforward" != "" ]
 200                 do
 201                 echo $myforward >> ${mypath}/dnscache/${myip}/root/servers/\@
 202                 read -p "   forward-to IP (press Enter to end)> " myforward
 203                 done
 204
 205                 echo
 206                 echo "   Currently all queries will be forwarded to:"
 207                 echo
 208                 cat ${mypath}/dnscache/${myip}/root/servers/\@
 209                 echo
 210         fi
 211
 212         echo "${SEPARATOR}"
 213         echo ": Configuring clients :"
 214         echo
 215         echo "   By default dnscache allows only localhost (127.0.0.1) to"
 216         echo "   access it. You have to specify the IP addresses of the"
 217         echo "   clients that shall be allowed to use it."
 218         echo
 219         echo "   Example:"
 220         echo "      1.2.3.4 would allow only one host: 1.2.3.4"
 221         echo "      1.2.3   would allow all hosts 1.2.3.0/24 (e.g. 1.2.3.4, 1.2.3.100, etc.)"
 222         echo
 223         echo "   Press Enter if you do NOT want to allow external clients!"
 224         echo
 225
 226         read -p "   Allowed IP> " myclientip
 227
 228         while [ "$myclientip" != "" ]
 229         do
 230                 touch ${mypath}/dnscache/${myip}/root/ip/${myclientip}
 231                 read -p "   Allowed IP (press Enter to end)> " myclientip
 232         done
 233
 234         echo
 235         echo "   All queries from the hosts below will be answered:"
 236         echo
 237         ls -1 ${mypath}/dnscache/${myip}/root/ip
 238         echo
 239
 240         #TODO
 241         #configure cachsize - $mypath/env/CACHESIZE
 242
 243         #TODO
 244         #configure datalimit - $mypath/env/DATALIMIT
 245         return 0
 246 }
 247
 248 common_setup()
 249 {
 250         local service_human="$1"
 251         local service_machine="$2"
 252         local services="$3"
 253
 254         echo ": ${service_human} setup :"
 255         echo
 256
 257         for service in ${services};
 258         do
 259         if [ ! -e ${mypath}/${service} ]
 260         then
 261                 ebegin "Creating ${mypath}/${service}"
 262                 mkdir -p $mypath/${service} && eend 0 || eend 1
 263         fi
 264         done
 265
 266         echo "${SEPARATOR}"
 267         echo ": IP address to bind to :"
 268         echo
 269         echo "   Specify an address to which the ${service_human} should bind."
 270         echo "   Currently accessible IPs:"
 271         local addrs=`ifconfig -a | grep "inet addr" | cut -f2 -d":" | cut -f1 -d" "`
 272         echo "     "$addrs
 273         echo
 274
 275         while [ "${myip}" == "" ]
 276         do
 277         read -p "   IP to bind to> " myip
 278         done
 279         echo
 280
 281         for service in ${services};
 282         do
 283         IPs[${service}]="${IPs[${service}]} ${myip}"
 284         done
 285
 286         local dnscache_INSTALL="/usr/bin/dnscache-conf dnscache dnslog ${mypath}/dnscache/${myip} $myip"
 287         local tinydns_INSTALL="/usr/bin/tinydns-conf tinydns dnslog ${mypath}/tinydns/${myip} $myip"
 288         local axfrdns_INSTALL="\
 289         /usr/bin/axfrdns-conf tinydns dnslog ${mypath}/axfrdns/${myip} ${mypath}/tinydns/${myip} $myip &&\
 290         mkdir -p ${mypath}/axfrdns/${myip}/control &&\
 291         echo -e \"tcp.axfrdns.cdb:\ttcp.axfrdns\n\ttcprules tcp.axfrdns.cdb .tcp.axfrdns.cdb.tmp < tcp.axfrdns\" > ${mypath}/axfrdns/${myip}/control/Makefile &&\
 292         rm -f ${mypath}/axfrdns/${myip}/tcp ${mypath}/axfrdns/${myip}/Makefile"
 293
 294         for service in ${services};
 295         do
 296         if [ ! -e ${mypath}/${service}/${myip} ]
 297         then
 298                 ebegin "Setting up ${service} in ${mypath}/${service}/${myip}"
 299                 eval command=\$${service}_INSTALL
 300                 /bin/bash -c "${command}" && eend 0 || eend 1
 301         else
 302                 ewarn "${service} directory ${mypath}/${service}/${myip} exists, nothing done."
 303         fi
 304         done
 305
 306 }
 307
 308 # functions }}}
 309
 310 # {{{ main script
 311
 312 if [ `id -u` -ne 0 ]
 313 then
 314         ewarn "You must be root to run this script, sorry."
 315         exit 1
 316 else
 317
 318         echo "${D_SEPARATOR}"
 319         echo ": DJB DNS setup :"
 320         echo
 321         echo "   This script will help you setup the following:"
 322         echo
 323         echo "     DNS server(s): to publish addresses of Internet hosts"
 324         echo
 325         echo "     DNS cache(s) : to  find   addresses of Internet hosts"
 326         echo
 327         echo "   For further information see:"
 328         echo "     http://cr.yp.to/djbdns/blurb/overview.html"
 329         echo
 330         ewarn "If you have already setup your services,"
 331         ewarn "either exit now, or setup in different directories."
 332         echo
 333
 334         answer=""
 335         read -p "   Would you like to continue with setup? [Y|n]> " answer
 336         if [ "${answer}" == "n" ] || [ "${answer}" == "N" ]
 337         then
 338         ewarn "Aborting setup"
 339         exit 1
 340         fi
 341
 342         echo "${D_SEPARATOR}"
 343         echo ": Choose install location :"
 344         echo
 345         default_path="/var"
 346         echo "   The default (${default_path}) will install them"
 347         echo "     in ${default_path}/\${service}/\${IP_ADDRESS}"
 348         echo
 349         echo " For example:"
 350         echo "     /var/tinydns /1.2.3.4"
 351         echo "                  /192.168.33.1"
 352         echo "         /axfrdns /1.2.3.4"
 353         echo "                  /192.168.33.1"
 354         echo "         /dnscache/127.0.0.1"
 355         echo
 356         ewarn "Do NOT enter trailing slash"
 357         echo "   Where do you want services installed?"
 358         read -p "[${default_path}] > " mypath
 359         echo
 360
 361         if [ "${mypath}" == "" ]
 362         then
 363         mypath=${default_path}
 364         fi
 365
 366         echo "${D_SEPARATOR}"
 367         check_group_users
 368
 369         answer=""
 370         another=""
 371         until [ "$answer" == "n" ]
 372         do
 373         echo "${D_SEPARATOR}"
 374         answer=""
 375         read -p "   Would you like to setup ${another}dnscache? [Y|n]> " answer
 376         if [ "${answer}" == "Y" ] || [ "${answer}" == "" ]
 377         then
 378                 myip=""
 379                 echo "${S_SEPARATOR}"
 380                 common_setup "DNS cache" "dnscache" "dnscache"
 381                 if [ $? == 0 ]
 382                 then
 383                 dnscache_setup
 384                 else
 385                 ewarn "Skipping dnscache specific setup."
 386                 fi
 387         fi
 388         another="another "
 389         done
 390
 391         answer=""
 392         another=""
 393         until [ "$answer" == "n" ]
 394         do
 395         echo "${D_SEPARATOR}"
 396         answer=""
 397         read -p "   Would you like to setup ${another}DNS server? [Y|n]> " answer
 398         if [ "${answer}" == "Y" ] || [ "${answer}" == "" ]
 399         then
 400                 myip=""
 401                 echo "${S_SEPARATOR}"
 402                 common_setup "DNS server" "{tinydns,afxrdns}" "tinydns axfrdns"
 403                 if [ $? == 0 ]
 404                 then
 405                 tinydns_setup
 406                 axfrdns_setup
 407                 else
 408                 ewarn "Skipping tinydns and axfrdns specific setup."
 409                 fi
 410         fi
 411         another="another "
 412         done
 413
 414         echo "${D_SEPARATOR}"
 415
 416         start_services "tinydns axfrdns dnscache"
 417
 418         echo "${D_SEPARATOR}"
 419 fi
 420 # main script }}}
 421 # vim: set ts=4 fenc=utf-8 foldmethod=marker: