Relying on an /etc/hostid file which is installed in the system
image breaks diskless systems which share an image. Certain
cluster infrastructure such as MPI relies on all nodes having
a unique hostid. However, we still must be careful to ensure
the hostid is syncronized between the initramfs and system
images when using zfs root filesystems.
To accompish this the automatically created /etc/hostid file has
been removed from the spl rpm packaging. The /etc/hostid file
is now dynamically created for your initramfs as part of the
dracut install process. This avoids the need to install it in
the actual system images.
This change also resolves the spl_hostid parameter handling
for dracut.
Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Closes #398
Closes #399
Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
inst_rules @udevruledir@/60-zvol.rules
inst @sysconfdir@/zfs/zdev.conf
inst @sysconfdir@/zfs/zpool.cache
inst_rules @udevruledir@/60-zvol.rules
inst @sysconfdir@/zfs/zdev.conf
inst @sysconfdir@/zfs/zpool.cache
- inst @sysconfdir@/hostid
dracut_install @sbindir@/zfs
dracut_install @sbindir@/zpool
dracut_install @bindir@/zpool_layout
dracut_install @sbindir@/zfs
dracut_install @sbindir@/zpool
dracut_install @bindir@/zpool_layout
dracut_install hostid
inst_hook cmdline 95 "$moddir/parse-zfs.sh"
inst_hook mount 98 "$moddir/mount-zfs.sh"
dracut_install hostid
inst_hook cmdline 95 "$moddir/parse-zfs.sh"
inst_hook mount 98 "$moddir/mount-zfs.sh"
+
+ # Synchronize initramfs and system hostid
+ TMP=`mktemp`
+ AA=`hostid | cut -b 1,2`
+ BB=`hostid | cut -b 3,4`
+ CC=`hostid | cut -b 5,6`
+ DD=`hostid | cut -b 7,8`
+ printf "\x$DD\x$CC\x$BB\x$AA" >$TMP
+ inst_simple "$TMP" /etc/hostid
+ rm "$TMP"
spl_hostid=`getarg spl_hostid=`
if [ "${spl_hostid}" != "" ] ; then
info "ZFS: Using hostid from command line: ${spl_hostid}"
spl_hostid=`getarg spl_hostid=`
if [ "${spl_hostid}" != "" ] ; then
info "ZFS: Using hostid from command line: ${spl_hostid}"
- echo "${spl_hostid}" > /etc/hostid
+ AA=`echo ${spl_hostid} | cut -b 1,2`
+ BB=`echo ${spl_hostid} | cut -b 3,4`
+ CC=`echo ${spl_hostid} | cut -b 5,6`
+ DD=`echo ${spl_hostid} | cut -b 7,8`
+ printf "\x$DD\x$CC\x$BB\x$AA" >/etc/hostid
elif [ -f /etc/hostid ] ; then
elif [ -f /etc/hostid ] ; then
- info "ZFS: Using hostid from /etc/hostid: `cat /etc/hostid`"
+ info "ZFS: Using hostid from /etc/hostid: `hostid`"
else
warn "ZFS: No hostid found on kernel command line or /etc/hostid. "
warn "ZFS: Pools may not import correctly."
else
warn "ZFS: No hostid found on kernel command line or /etc/hostid. "
warn "ZFS: Pools may not import correctly."