On 05/12/12 05:00 AM, Jeff A. Smith wrote:
I have changes to convert /var/nfs and /var/statmon
into consumers of the shared /var/share dataset, and
they work great -- this was much simpler than I expected.
Great to hear it. Some context for var/share is available below[1].
But, I have a lingering design question. I noticed
that the current /var/share consumers are packaged
in system-core-os.mf (mail, cores, crash, audit, etc).
Since the nfs-related dirs I'm converting to be shared
are packaged in system-file-system-nfs.mf, I added
the var/share related packaging magic there.
That should be fine so long as you can guarantee that the migration
script is present, and that it will always run. In this case, as the
migration script is run as part of
svc:/system/filesystem/minimal:default and packaged in core-os, it will.
Sorry in advance if this question is too stupid to
post, but I'd like confirmation that it is okay to do
the var/share packaging magic in manifests for
packages that can be removed / uninstalled (unlike
system-core-os.mf which can't).
That's a good question. Yes, it's fine to allow non-core-os packages to
use the var/share infrastructure.
What will happen in the case of a package previously delivering shared
directories, is that once the package delivering /var/.migrate/nfs and
the link /var/nfs -> /var/share/nfs is uninstalled, the previously
shared file and directory content will remain in /var/share, but the
system will no longer contain a /var/nfs symlink.
[ so booting back to previous BEs that do still have a /var/nfs symlink
will function properly ]
Do I need to relocate the var/share changes I added to
system-file-system-nfs.mf into system-core-os.mf?
Nope, no need - this was designed to allow multiple packages share their
contents. Hopefully the pkglint checks in ON would have pointed out any
problems wrt. /var/share, but feel free to point me at a webrev offline,
and I'll take a look.
cheers,
tim
[1] The infrastructure for dealing with /var/share and other directories
that need to be shared across boot environments is discussed in the IPS
Dev Guide, Chapter 10 in the section "Delivering Directories To Be
Shared Across Boot Environments",
http://hub.opensolaris.org/bin/download/Project+pkg/files/ipsdevguide.pdf
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