From ac7c4c9c42ce707caeae4c651a7bc16e369f906a Mon Sep 17 00:00:00 2001 From: erdgeist Date: Wed, 15 Mar 2006 23:49:11 +0000 Subject: Experimental image based ezjail support --- ezjail-img.sh | 194 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 194 insertions(+) create mode 100644 ezjail-img.sh (limited to 'ezjail-img.sh') diff --git a/ezjail-img.sh b/ezjail-img.sh new file mode 100644 index 0000000..b577682 --- /dev/null +++ b/ezjail-img.sh @@ -0,0 +1,194 @@ +#!/bin/sh + +# ugly: this variable is set during port install time +ezjail_prefix=EZJAIL_PREFIX +ezjail_etc=${ezjail_prefix}/etc +ezjail_share=${ezjail_prefix}/share/ezjail +ezjail_examples=${ezjail_prefix}/share/examples/ezjail +ezjail_jailcfgs=${ezjail_etc}/ezjail + +# read user config +[ -f ${ezjail_etc}/ezjail.conf ] && . ${ezjail_etc}/ezjail.conf + +# set defaults +ezjail_jaildir=${ezjail_jaildir:-"/usr/jails"} +ezjail_jailtemplate=${ezjail_jailtemplate:-"${ezjail_jaildir}/newjail"} +ezjail_jailbase=${ezjail_jailbase:-"${ezjail_jaildir}/basejail"} +ezjail_jailfull=${ezjail_jailfull:-"${ezjail_jaildir}/fulljail"} +ezjail_flavours=${ezjail_flavours:-"${ezjail_jaildir}/flavours"} +ezjail_sourcetree=${ezjail_sourcetree:-"/usr/src"} +ezjail_portscvsroot=${ezjail_portscvsroot:-":pserver:anoncvs@anoncvs.at.FreeBSD.org:/home/ncvs"} + +ezjail_mount_enable=${ezjail_mount_enable:-"YES"} +ezjail_devfs_enable=${ezjail_devfs_enable:-"YES"} +ezjail_devfs_ruleset=${ezjail_devfs_ruleset:-"devfsrules_jail"} +ezjail_procfs_enable=${ezjail_procfs_enable:-"YES"} +ezjail_fdescfs_enable=${ezjail_fdescfs_enable:-"YES"} + +# define our bail out shortcut +exerr () { echo -e "$*"; exit 1; } + +# check for command +[ "$1" ] || exerr "Usage: `basename -- $0` [create] {params}" + +case "$1" in +######################## ezjail-admin CREATE ######################## +create) + shift + args=`getopt xf:r:i: $*` || exerr "Usage: `basename -- $0` create [-f flavour] [-r jailroot] [-i size] [-xc] jailname jailip" + + newjail_root= + newjail_flavour= + newjail_softlink= + newjail_imagesize= + newjail_cryptimage= + newjail_fill="YES" + + set -- ${args} + for arg do + case ${arg} in + -x) newjail_fill="NO"; shift;; + -r) newjail_root="$2"; shift 2;; + -f) newjail_flavour="$2"; shift 2;; + -i) newjail_imagesize="$2"; shift 2;; + -c) newjail_cryptimage="YES"; shift;; + --) shift; break;; + esac + done + newjail_name=$1; newjail_ip=$2 + + # we need at least a name and an ip for new jail + [ "${newjail_name}" -a "${newjail_ip}" -a $# = 2 ] || exerr "Usage: `basename -- $0` create [-f flavour] [-r jailroot] [-x] jailname jailip" + + # check for sanity of settings concerning the image feature + [ "${newjail_cryptimage}" = "YES" -a ! "${newjail_imagesize}" ] && exerr "Cryptimages need an image size." + + # check, whether ezjail-update has been called. existence of + # ezjail_jailbase is our indicator + [ -d ${ezjail_jailbase} ] || exerr "Error: base jail does not exist. Please run 'ezjail-admin update' first." + + # relative paths don't make sense in rc.scripts + [ "${ezjail_jaildir%%[!/]*}" ] || exerr "Error: Need an absolute path in ezjail_jaildir, it currently is set to: ${ezjail_jaildir}." + + # jail names must not irritate file systems, excluding dots from this list + # was done intentionally to permit foo.com style directory names, however, + # the jail name will be foo_com in most scripts + + newjail_name=`echo -n ${newjail_name} | tr /~ __` + newjail_nname=`echo -n "${newjail_name}" | tr -c [:alnum:] _` + newjail_root=${newjail_root:-"${ezjail_jaildir}/${newjail_name}"} + + # This scenario really will only lead to real troubles in the 'fulljail' + # case, but I should still explain this to the user and not claim that + # "an ezjail would already exist" + [ "${newjail_nname}" = "basejail" -o "${newjail_nname}" = "newjail" -o "${newjail_nname}" = "fulljail" -o "${newjail_nname}" = "flavours" ] && \ + exerr "Error: ezjail needs the ${newjail_nname} directory for its own administrative purposes. Please rename the ezjail." + + # jail names may lead to identical configs, eg. foo.bar.com == foo-bar.com + # so check, whether we might be running into problems + [ -e ${ezjail_jailcfgs}/${newjail_nname} ] && exerr "Error: an ezjail config already exists at ${ezjail_jailcfgs}/${newjail_nname}. Please rename the ezjail." + + # if jail root specified on command line is not absolute, make it absolute + # inside our jail directory + [ "${newjail_root%%[!/]*}" ] || newjail_root=${ezjail_jaildir}/${newjail_root} + + # if a directory at the specified jail root already exists, refuse to + # install + [ -e ${newjail_root} -a "${newjail_fill}" = "YES" ] && exerr "Error: the specified jail root ${newjail_root} alread exists." + + # if jail root specified on command line does not lie within our jail + # directory, we need to create a softlink + if [ "${newjail_root##${ezjail_jaildir}}" = "${newjail_root}" ]; then + newjail_softlink=${ezjail_jaildir}/`basename -- ${newjail_root}` + [ -e ${newjail_softlink} -a "${newjail_fill}" = "YES" ] && exerr "Error: an ezjail already exists at ${newjail_softlink}." + fi + + # do some sanity checks on the selected flavour (if any) + [ "${newjail_flavour}" -a ! -d ${ezjail_flavours}/${newjail_flavour} ] && exerr "Error: Flavour config directory ${ezjail_flavours}/${newjail_flavour} not found." + + # + # All sanity checks that may lead to errors are hopefully passed here + # + + # if image is wanted, check, whether the img-file already is present + if [ "${newjail_imagesize}" ]; then + newjail_image=${newjail_root%/}; while [ "${newjail_image}" -a -z "${newjail_image%%*/" ]; do newjail_image=${newjail_image%/}; done + [ -z "${newjail_image}" ] && exerr Could not determine image file name, something is wrong with the jail root: ${newjail_root}. + newjail_image=${newjail_image}.img + [ -e "${newjail_image}" ] && exerr "Error: a file exists at the location ${newjail_image}, preventing our own image file to be created. + + touch "${newjail_image}" + dd if=/dev/random of="${newjail_image}" bs=${newjail_imagesize} count=1 || exerr Could not (or not fully) create the image file. You might want to check (and possibly remove) the file "${newjail_image}". The image size provided was ${newjail_imagesize}. + newjail_device=/dev/`mdconfig -a -t vnode -f ${newjail_image}` + newfs ${newjail_device} + mount ${newjail_device} ${newjail_root} + fi + + # now take a copy of our template jail + if [ "${newjail_fill}" = "YES" ]; then + mkdir -p ${newjail_root} && cd ${ezjail_jailtemplate} && \ + find * | cpio -p -v ${newjail_root} > /dev/null + [ $? = 0 ] || exerr "Error: Could not copy template jail." + fi + + # if a soft link is necessary, create it now + [ "${newjail_softlink}" ] && ln -s ${newjail_root} ${newjail_softlink} + + # if the automount feature is not disabled, this fstab entry for new jail + # will be obeyed + echo ${ezjail_jailbase} ${newjail_root}/basejail nullfs ro 0 0 > /etc/fstab.${newjail_nname} + + # now, where everything seems to have gone right, create control file in + # ezjails config dir + mkdir -p ${ezjail_jailcfgs} + echo export jail_${newjail_nname}_hostname=\"${newjail_name}\" > ${ezjail_jailcfgs}/${newjail_nname} + echo export jail_${newjail_nname}_ip=\"${newjail_ip}\" >> ${ezjail_jailcfgs}/${newjail_nname} + echo export jail_${newjail_nname}_rootdir=\"${newjail_root}\" >> ${ezjail_jailcfgs}/${newjail_nname} + echo export jail_${newjail_nname}_exec=\"/bin/sh /etc/rc\" >> ${ezjail_jailcfgs}/${newjail_nname} + echo export jail_${newjail_nname}_mount_enable=\"${ezjail_mount_enable}\" >> ${ezjail_jailcfgs}/${newjail_nname} + echo export jail_${newjail_nname}_devfs_enable=\"${ezjail_devfs_enable}\" >> ${ezjail_jailcfgs}/${newjail_nname} + echo export jail_${newjail_nname}_devfs_ruleset=\"devfsrules_jail\" >> ${ezjail_jailcfgs}/${newjail_nname} + echo export jail_${newjail_nname}_procfs_enable=\"${ezjail_procfs_enable}\" >> ${ezjail_jailcfgs}/${newjail_nname} + echo export jail_${newjail_nname}_fdescfs_enable=\"${ezjail_fdescfs_enable}\" >> ${ezjail_jailcfgs}/${newjail_nname} + [ "${newjail_imagesize}" ] && \ + echo export jail_${newjail_nname}_image=\"YES\" >> ${ezjail_jailcfgs}/${newjail_nname} + [ "${newjail_cryptimage}" ] && \ + echo export jail_${newjail_nname}_cryptimage=\"YES\" >> ${ezjail_jailcfgs}/${newjail_nname} + + # Final steps for flavour installation + if [ "${newjail_flavour}" ]; then + # install files and config to new jail + cd ${ezjail_flavours}/${newjail_flavour} && find * | cpio -p -v ${newjail_root} > /dev/null + [ $? = 0 ] || echo "Warning: Could not fully install flavour." + + # If a config is found, make it auto run on jails startup + if [ -f ${newjail_root}/ezjail.flavour ]; then + ln -s /ezjail.flavour ${newjail_root}/etc/rc.d/ezjail-config.sh + chmod 0700 ${newjail_root}/ezjail.flavour + echo "Note: Shell scripts installed, flavourizing on jails first startup." + fi + fi + + # + # For user convenience some scenarios commonly causing headaches are checked + # + + # check, whether IP is configured on a local interface, warn if it isnt + ping -c 1 -m 1 -t 1 -q ${newjail_ip} > /dev/null + [ $? = 0 ] || echo "Warning: IP ${newjail_ip} not configured on a local interface." + + # check, whether some host system services do listen on the Jails IP + TIFS=${IFS}; IFS=_ + newjail_listener=`sockstat -4 -l | grep ${newjail_ip}:[[:digit:]]` + [ $? = 0 ] && echo -e "Warning: Some services already seem to be listening on IP ${newjail_ip}\n This may cause some confusion, here they are:\n${newjail_listener}" + + newjail_listener=`sockstat -4 -l | grep \*:[[:digit:]]` + [ $? = 0 ] && echo -e "Warning: Some services already seem to be listening on all IP, (including ${newjail_ip})\n This may cause some confusion, here they are:\n${$ + IFS=${TIFS} + + ;; +*) + exerr "Usage: `basename -- $0` [create|delete|list|update] {params}" + ;; +esac + -- cgit v1.2.3