zfs/lib
Olaf Faaland b9373170e3 Add zgenhostid utility script
Turning the multihost property on requires that a hostid be set to allow
ZFS to determine when a foreign system is attemping to import a pool.
The error message instructing the user to set a hostid refers to
genhostid(1).

Genhostid(1) is not available on SUSE Linux.  This commit adds a script
modeled after genhostid(1) for those users.

Zgenhostid checks for an /etc/hostid file; if it does not exist, it
creates one and stores a value.  If the user has provided a hostid as an
argument, that value is used.  Otherwise, a random hostid is generated
and stored.

This differs from the CENTOS 6/7 versions of genhostid, which overwrite
the /etc/hostid file even though their manpages state otherwise.

A man page for zgenhostid is added. The one for genhostid is in (1), but
I put zgenhostid in (8) because I believe it's more appropriate.

The mmp tests are modified to use zgenhostid to set the hostid instead
of using the spl_hostid module parameter.  zgenhostid will not replace
an existing /etc/hostid file, so new mmp_clear_hostid calls are
required.

Reviewed-by: Giuseppe Di Natale <dinatale2@llnl.gov>
Reviewed-by: Andreas Dilger <andreas.dilger@intel.com>
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Olaf Faaland <faaland1@llnl.gov>
Closes #6358
Closes #6379
2017-07-25 13:22:03 -04:00
..
libavl Support parallel build trees (VPATH builds) 2015-07-17 13:42:51 -07:00
libefi Fixes for issues found with cppcheck tool 2016-07-27 13:31:22 -07:00
libicp OpenZFS 4185 - add new cryptographic checksums to ZFS: SHA-512, Skein, Edon-R 2016-10-03 14:51:15 -07:00
libnvpair codebase style improvements for OpenZFS 6459 port 2017-01-22 13:25:40 -08:00
libshare Fix nfs snapdir automount 2017-03-08 09:26:33 -08:00
libspl Fixed VERIFY3_IMPL() bug from 682ce104 2017-07-12 17:15:24 -07:00
libunicode Support parallel build trees (VPATH builds) 2015-07-17 13:42:51 -07:00
libuutil Fix coverity defects: CID 147629 2016-11-08 16:41:31 -08:00
libzfs Add zgenhostid utility script 2017-07-25 13:22:03 -04:00
libzfs_core OpenZFS 7600 - zfs rollback should pass target snapshot to kernel 2017-07-04 15:29:52 -07:00
libzpool Multi-modifier protection (MMP) 2017-07-13 13:54:00 -04:00
Makefile.am Illumos Crypto Port module added to enable native encryption in zfs 2016-07-20 10:43:30 -07:00