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29 lines
1.1 KiB
Plaintext
29 lines
1.1 KiB
Plaintext
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#!/bin/sh
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set -e
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# The hostname and hostid of the last system to access a ZFS pool are stored in
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# the ZFS pool itself. A pool is foreign if, during `zpool import`, the
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# current hostname and hostid are different than the stored values thereof.
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#
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# The only way of having a stable hostid is to define it in /etc/hostid.
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# This postinst helper will check if we already have the hostid stabilized by
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# checking the existence of the file /etc/hostid to be 4 bytes at least.
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# If this file don't already exists on our system or has less than 4 bytes, then
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# a new (random) value is generated with zgenhostid (8) and stored in
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# /etc/hostid
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if [ ! -f /etc/hostid ] || [ "$(stat -c %s /etc/hostid)" -lt 4 ] ; then
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zgenhostid
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fi
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# When processed to here but zfs kernel module is not loaded, the subsequent
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# services would fail to start. In this case the installation process just
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# fails at the postinst stage. The user could do
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# $ sudo modprobe zfs; sudo dpkg --configure -a
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# to complete the installation.
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#
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modprobe -v zfs || true # modprobe zfs does nothing if zfs.ko was already loaded.
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#DEBHELPER#
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