[OmniOS-discuss] pkg(5) in alternate roots

[Jim Klimov]

1 июля 2015 г. 15:20:56 CEST, Jim Klimov <jim at cos.ru> пишет:
>Hello all,
>
>
>Due to my split-root configurations, I often do OI/OmniOS upgrades in a
>pre-created cloned BE (automated by
>https://github.com/jimklimov/illumos-splitroot-scripts since the
>generic beadm/zfs clone do a poor job with customized zfs attributes on
>child datasets). As part of an upgrade, I do a chroot into the mounted
>new BE to use the pkg(5) "in place" (and with altroot of "/") and if
>this fails - I fall back to alternate root (-R) with the unchanged
>pkg(5) version installed in the original BE. In either case, I pass the
>"--deny-new-be" parameter to pkg(5). (relevant code snippet is
>presented below in this message)
>
>
>However there are some packages whose upgrades seem to require a
>"non-Live BE" installation. And even though I install to an alternate
>BE, they fail. Is there some way around this, beside fixing pkg(5)
>itself?
>
>
>For example, recently I got the state below: the pkg program got
>updated in the new BE, but it could not be used via chroot due to "live
>image" concerns, and the old pkg(5) in original BE did not suffice for
>the upgrades. A reboot into the new BE and another upgrade request
>fixes this, but that's kind of unwieldy. And installing new pkg into
>old BE goes somewhat against the purpose of BEs (unchanged old state I
>can roll back into - thus including escape from broken pkg(5) as any
>other bit of system software).
>
>
>Screenshot from the script:
>
>
>
>===== Updating PKG software itself
>Packages to update: 1
>
>
>DOWNLOAD                                PKGS         FILES    XFER (MB)
>  SPEED
>Completed                                1/1         16/16      0.3/0.3
> 303k/s
>
>
>PHASE                                          ITEMS
>Removing old actions                             1/1
>Updating modified actions                      18/18
>Updating package state database                 Done
>Updating package cache                           1/1
>Updating image state                            Done
>Creating fast lookup database                   Done
>Reading search index                            Done
>Updating search index                            1/1
>
>
>
>===== Updating the image with new PKG software via chroot
>pkg update: The proposed operation cannot be performed on a live image.
>===== Updating the image with old PKG software via altroot
>WARNING: pkg(5) appears to be out of date, and should be updated before
>running update.  Please update pkg(5) by executing 'pkg install
>pkg:/package/pkg' as a privileged user and then retry the update.
>===== Updating the image with old PKG software via altroot and allowed
>refresh
>WARNING: pkg(5) appears to be out of date, and should be updated before
>running update.  Please update pkg(5) by executing 'pkg install
>pkg:/package/pkg' as a privileged user and then retry the update.
>
>
>
>
>The corresponding part of the script (and exact command-lines involved)
>are here:
>
>
>...
>
>        { echo "===== Updating PKG software itself"
>          ### This clause should fail if no 'pkg' updates were
>available, or if a
>          ### chrooted upgrade attempt with the new 'pkg' failed - both
>ways fall
>          ### through to altroot upgrade attempt
>          if /usr/bin/pkg -R "$BENEW_MNT" update --no-refresh --accept
>--deny-new-be --no-backup-be pkg; then \
>            echo "===== Updating the image with new PKG software via
>chroot"
>            chroot "$BENEW_MNT" /usr/bin/pkg -R / image-update
>--no-refresh --accept --deny-new-be --no-backup-be
>          else false; fi; } || \
>        { echo "===== Updating the image with old PKG software via
>altroot"
>          /usr/bin/pkg -R "$BENEW_MNT" image-update --no-refresh
>--accept --deny-new-be --no-backup-be; } || \
>        { echo "===== Updating the image with old PKG software via
>altroot and allowed refresh"
>          /usr/bin/pkg -R "$BENEW_MNT" image-update --accept
>--deny-new-be --no-backup-be; }
>...
>
>
>
>
>Essentially, what I want is for pkg(5) to correctly guess, or be told
>by the caller, that it in fact does not modify a "live" image and so
>can do anything dangerous it would please to do.
>
>
>Thanks in advance,
>Jim Klimov
>
>
>
>
>
>
>------------------------------------------------------------------------
>
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I guess i found the workaround - the pkg(5) script honors some PKG_LIVE_ROOT variable, for unittesting from what i gather, that along with -R allows to not create BEs for packages that otherwise need them.

I guess this is not a committed api, but will have to do ;)

Jim
--
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