Functionality moved to ezjail-admin
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erdgeist
parent
6c388abea8
commit
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244
ezjail-img.sh
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ezjail-img.sh
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#!/bin/sh
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# ugly: this variable is set during port install time
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#ezjail_prefix=EZJAIL_PREFIX
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ezjail_prefix=/usr/local/
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ezjail_etc=${ezjail_prefix}/etc
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ezjail_share=${ezjail_prefix}/share/ezjail
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ezjail_examples=${ezjail_prefix}/share/examples/ezjail
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ezjail_jailcfgs=${ezjail_etc}/ezjail
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# read user config
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[ -f ${ezjail_etc}/ezjail.conf ] && . ${ezjail_etc}/ezjail.conf
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# set defaults
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ezjail_jaildir=${ezjail_jaildir:-"/usr/jails"}
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ezjail_jailtemplate=${ezjail_jailtemplate:-"${ezjail_jaildir}/newjail"}
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ezjail_jailbase=${ezjail_jailbase:-"${ezjail_jaildir}/basejail"}
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ezjail_jailfull=${ezjail_jailfull:-"${ezjail_jaildir}/fulljail"}
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ezjail_flavours=${ezjail_flavours:-"${ezjail_jaildir}/flavours"}
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ezjail_sourcetree=${ezjail_sourcetree:-"/usr/src"}
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ezjail_portscvsroot=${ezjail_portscvsroot:-":pserver:anoncvs@anoncvs.at.FreeBSD.org:/home/ncvs"}
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ezjail_mount_enable=${ezjail_mount_enable:-"YES"}
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ezjail_devfs_enable=${ezjail_devfs_enable:-"YES"}
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ezjail_devfs_ruleset=${ezjail_devfs_ruleset:-"devfsrules_jail"}
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ezjail_procfs_enable=${ezjail_procfs_enable:-"YES"}
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ezjail_fdescfs_enable=${ezjail_fdescfs_enable:-"YES"}
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# define our bail out shortcut
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exerr () { echo -e "$*"; exit 1; }
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# define detach strategy for image jails
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detach_images () {
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# unmount and detach memory disc
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if [ "${newjail_img_device}" ]; then
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umount ${newjail_root}
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[ "${newjail_image}" = "crypto" ] && gbde detach /dev/${newjail_img_device}
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mdconfig -d -u ${newjail_img_device}
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fi
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}
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# check for command
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[ "$1" ] || exerr "Usage: `basename -- $0` [create] {params}"
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case "$1" in
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######################## ezjail-admin CREATE ########################
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create)
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shift
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args=`getopt f:r:s:xic $*` || exerr "Usage: `basename -- $0` create [-f flavour] [-r jailroot] [-s size] [-xic] jailname jailip"
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newjail_root=
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newjail_flavour=
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newjail_softlink=
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newjail_image=
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newjail_imagesize=
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newjail_device=
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newjail_fill="YES"
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set -- ${args}
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for arg do
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case ${arg} in
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-x) newjail_fill="NO"; shift;;
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-r) newjail_root="$2"; shift 2;;
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-f) newjail_flavour="$2"; shift 2;;
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-i) newjail_image="simple"; shift;;
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-s) newjail_imagesize="$2"; shift 2;;
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-c) newjail_image="crypto"; shift;;
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--) shift; break;;
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esac
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done
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newjail_name=$1; newjail_ip=$2
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# we need at least a name and an ip for new jail
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[ "${newjail_name}" -a "${newjail_ip}" -a $# = 2 ] || exerr "Usage: `basename -- $0` create [-f flavour] [-r jailroot] [-x] jailname jailip"
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# check for sanity of settings concerning the image feature
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[ "${newjail_image}" -a "$newjail_fill" = "YES" -a ! "${newjail_imagesize}" ] && exerr "Image jails need an image size."
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# check, whether ezjail-update has been called. existence of
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# ezjail_jailbase is our indicator
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[ -d ${ezjail_jailbase} ] || exerr "Error: base jail does not exist. Please run 'ezjail-admin update' first."
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# relative paths don't make sense in rc.scripts
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[ "${ezjail_jaildir%%[!/]*}" ] || exerr "Error: Need an absolute path in ezjail_jaildir, it currently is set to: ${ezjail_jaildir}."
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# jail names must not irritate file systems, excluding dots from this list
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# was done intentionally to permit foo.com style directory names, however,
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# the jail name will be foo_com in most scripts
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newjail_name=`echo -n ${newjail_name} | tr /~ __`
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newjail_nname=`echo -n "${newjail_name}" | tr -c [:alnum:] _`
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newjail_root=${newjail_root:-"${ezjail_jaildir}/${newjail_name}"}
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# This scenario really will only lead to real troubles in the 'fulljail'
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# case, but I should still explain this to the user and not claim that
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# "an ezjail would already exist"
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[ "${newjail_nname}" = "basejail" -o "${newjail_nname}" = "newjail" -o "${newjail_nname}" = "fulljail" -o "${newjail_nname}" = "flavours" ] && \
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exerr "Error: ezjail needs the ${newjail_nname} directory for its own administrative purposes. Please rename the ezjail."
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# jail names may lead to identical configs, eg. foo.bar.com == foo-bar.com
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# so check, whether we might be running into problems
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[ -e ${ezjail_jailcfgs}/${newjail_nname} ] && exerr "Error: an ezjail config already exists at ${ezjail_jailcfgs}/${newjail_nname}. Please rename the ezjail."
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# if jail root specified on command line is not absolute, make it absolute
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# inside our jail directory
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[ "${newjail_root%%[!/]*}" ] || newjail_root=${ezjail_jaildir}/${newjail_root}
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# if a directory at the specified jail root already exists, refuse to
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# install
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[ -e ${newjail_root} -a "${newjail_fill}" = "YES" ] && exerr "Error: the specified jail root ${newjail_root} alread exists."
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# if jail root specified on command line does not lie within our jail
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# directory, we need to create a softlink
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if [ "${newjail_root##${ezjail_jaildir}}" = "${newjail_root}" ]; then
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newjail_softlink=${ezjail_jaildir}/`basename -- ${newjail_root}`
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[ -e ${newjail_softlink} -a "${newjail_fill}" = "YES" ] && exerr "Error: an ezjail already exists at ${newjail_softlink}."
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fi
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# do some sanity checks on the selected flavour (if any)
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[ "${newjail_flavour}" -a ! -d ${ezjail_flavours}/${newjail_flavour} ] && exerr "Error: Flavour config directory ${ezjail_flavours}/${newjail_flavour} not found."
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#
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# All sanity checks that may lead to errors are hopefully passed here
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#
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if [ "${newjail_image}" ]; then
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# Strip trailing slashes from jail root, those would confuse image path
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newjail_img=${newjail_root%/}; while [ "${newjail_img}" -a -z "${newjail_img%%*/}" ]; do newjail_img=${newjail_img%/}; done
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[ -z "${newjail_img}" ] && exerr "Error: Could not determine image file name, something is wrong with the jail root: ${newjail_root}."
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# Location of our image and crypto image lock file
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newjail_lock=${newjail_img}.lock
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newjail_img=${newjail_img}.img
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# If NOT exist, create image
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if [ "$newjail_fill" = "YES" ]; then
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[ -e "${newjail_img}" ] && exerr "Error: a file exists at the location ${newjail_img}, preventing our own image file to be created."
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[ "${newjail_image}" = "crypto" -a -e "${newjail_lock}" ] && exerr "Error: a file exists at the location ${newjail_lock}, preventing our own crypto image lock file to be created."
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# Now create jail disc image
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touch "${newjail_img}"
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dd if=/dev/random of="${newjail_img}" bs="${newjail_imagesize}" count=1 || exerr "Error: Could not (or not fully) create the image file. You might want to check (and possibly remove) the file ${newjail_img}. The image size provided was ${newjail_imagesize}."
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# And attach device
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newjail_img_device=`mdconfig -a -t vnode -f ${newjail_img}`
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if [ "${newjail_image}" = "crypto" ]; then
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# Initialise crypto image
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# XXX TODO: catch error and detach memory disc
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echo "Initialising crypto device. Enter a new passphrase twice..."
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gbde init /dev/${newjail_img_device} -L ${newjail_lock}
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# XXX TODO: catch error and detach memory disc
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echo "Attaching crypto device. Enter the passphrase..."
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gbde attach /dev/${newjail_img_device} -l ${newjail_lock}
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newjail_device=${newjail_img_device}.bde
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else
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newjail_device=${newjail_img_device}
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fi
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# Format memory image
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newfs /dev/${newjail_device}
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# Create mount point and mount
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mkdir -p ${newjail_root}
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mount /dev/${newjail_device} ${newjail_root}
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else
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[ -e ${newjail_root} -a ! -d ${newjail_root} ] && exerr "Error: Could not create mount point for your jail image. A file exists at its location. (For existing image jails, call this tool without the .img suffix when specifying jail root.)"
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[ -d ${newjail_root} ] || mkdir -p ${newjail_root}
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fi
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fi
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# now take a copy of our template jail
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if [ "${newjail_fill}" = "YES" ]; then
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mkdir -p ${newjail_root} && cd ${ezjail_jailtemplate} && find * | cpio -p -v ${newjail_root} > /dev/null
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[ $? = 0 ] || detach_images || exerr "Error: Could not copy template jail."
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fi
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# if a soft link is necessary, create it now
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[ "${newjail_softlink}" ] && ln -s ${newjail_root} ${newjail_softlink}
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# if the automount feature is not disabled, this fstab entry for new jail
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# will be obeyed
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echo -n > /etc/fstab.${newjail_nname}
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[ "${newjail_image}" ] && \
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echo ${newjail_root}.device ${newjail_root} ufs rw 0 0 >> /etc/fstab.${newjail_nname}
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echo ${ezjail_jailbase} ${newjail_root}/basejail nullfs ro 0 0 >> /etc/fstab.${newjail_nname}
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# now, where everything seems to have gone right, create control file in
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# ezjails config dir
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mkdir -p ${ezjail_jailcfgs}
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echo export jail_${newjail_nname}_hostname=\"${newjail_name}\" > ${ezjail_jailcfgs}/${newjail_nname}
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echo export jail_${newjail_nname}_ip=\"${newjail_ip}\" >> ${ezjail_jailcfgs}/${newjail_nname}
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echo export jail_${newjail_nname}_rootdir=\"${newjail_root}\" >> ${ezjail_jailcfgs}/${newjail_nname}
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echo export jail_${newjail_nname}_exec=\"/bin/sh /etc/rc\" >> ${ezjail_jailcfgs}/${newjail_nname}
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echo export jail_${newjail_nname}_mount_enable=\"${ezjail_mount_enable}\" >> ${ezjail_jailcfgs}/${newjail_nname}
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echo export jail_${newjail_nname}_devfs_enable=\"${ezjail_devfs_enable}\" >> ${ezjail_jailcfgs}/${newjail_nname}
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echo export jail_${newjail_nname}_devfs_ruleset=\"devfsrules_jail\" >> ${ezjail_jailcfgs}/${newjail_nname}
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echo export jail_${newjail_nname}_procfs_enable=\"${ezjail_procfs_enable}\" >> ${ezjail_jailcfgs}/${newjail_nname}
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echo export jail_${newjail_nname}_fdescfs_enable=\"${ezjail_fdescfs_enable}\" >> ${ezjail_jailcfgs}/${newjail_nname}
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[ "${newjail_image}" ] && \
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echo export jail_${newjail_nname}_image=\"${newjail_img}\" >> ${ezjail_jailcfgs}/${newjail_nname}
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[ "${newjail_image}" = "crypto" ] && \
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echo export jail_${newjail_nname}_cryptimage=\"YES\" >> ${ezjail_jailcfgs}/${newjail_nname}
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# Final steps for flavour installation
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if [ "${newjail_fill}" = "YES" -a "${newjail_flavour}" ]; then
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# install files and config to new jail
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cd ${ezjail_flavours}/${newjail_flavour} && find * | cpio -p -v ${newjail_root} > /dev/null
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[ $? = 0 ] || echo "Warning: Could not fully install flavour."
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# If a config is found, make it auto run on jails startup
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if [ -f ${newjail_root}/ezjail.flavour ]; then
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ln -s /ezjail.flavour ${newjail_root}/etc/rc.d/ezjail-config.sh
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chmod 0700 ${newjail_root}/ezjail.flavour
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echo "Note: Shell scripts installed, flavourizing on jails first startup."
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fi
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fi
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# Detach (crypto and) memory discs
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detach_images
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#
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# For user convenience some scenarios commonly causing headaches are checked
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#
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# check, whether IP is configured on a local interface, warn if it isnt
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ping -c 1 -m 1 -t 1 -q ${newjail_ip} > /dev/null
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[ $? = 0 ] || echo "Warning: IP ${newjail_ip} not configured on a local interface."
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# check, whether some host system services do listen on the Jails IP
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TIFS=${IFS}; IFS=_
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newjail_listener=`sockstat -4 -l | grep ${newjail_ip}:[[:digit:]]`
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[ $? = 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}"
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newjail_listener=`sockstat -4 -l | grep \*:[[:digit:]]`
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[ $? = 0 ] && echo -e "Warning: Some services already seem to be listening on all IP, (including ${newjail_ip})\n This may cause some confusion, here they are:\n${newjail_listener}"
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IFS=${TIFS}
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;;
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*)
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exerr "Usage: `basename -- $0` [create|delete|list|update] {params}"
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;;
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esac
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