When you set permission/ownership for directories in $D (the image) for an user/group which will be created during emerge, group ownership will be lost when image will be merged to $ROOT. This doesn't happen on second run (the directory which will be merged was of course removed before) or when you use `ebuild` but do the merge in two steps (i.e. `ebuild foo-1.ebuild clean install && ebuild foo-1.ebuild merge`). I added some debug code to prove that the image was created like expected: > --- a/app-metrics/mysqld_exporter/mysqld_exporter-0.10.0-r1.ebuild > +++ b/app-metrics/mysqld_exporter/mysqld_exporter-0.10.0-r1.ebuild > @@ -53,6 +53,11 @@ src_install() { > newins "${FILESDIR}"/${PN}.logrotate ${PN} > } > > +pkg_preinst() { > + einfo "Debug: ls -ld ${ED%/}/var/lib/mysqld_exporter" > + ls -ld "${ED%/}"/var/lib/mysqld_exporter > +} > + > pkg_postinst() { > if [[ -z "${REPLACING_VERSIONS}" ]]; then > # This is a new installation Test run: > vm-gentoo-x64 ~ # id mysqld_exporter > id: ‘mysqld_exporter’: no such user > vm-gentoo-x64 ~ # ls -ld /var/lib/mysqld_exporter > ls: cannot access '/var/lib/mysqld_exporter': No such file or directory Clean environment, the user and folder our test ebuild will create doesn't exist yet. > vm-gentoo-x64 ~ # emerge -1 app-metrics/mysqld_exporter > > These are the packages that would be merged, in order: > > Calculating dependencies... done! > [ebuild R ] app-metrics/mysqld_exporter-0.10.0-r1::gentoo 0 KiB > > Total: 1 package (1 reinstall), Size of downloads: 0 KiB > > > >>> Verifying ebuild manifests > > >>> Emerging (1 of 1) app-metrics/mysqld_exporter-0.10.0-r1::gentoo > * mysqld_exporter-0.10.0.tar.gz BLAKE2B SHA512 size ;-) ... [ ok ] > * Adding group 'mysqld_exporter' to your system ... > * - Groupid: next available > * Adding user 'mysqld_exporter' to your system ... > * - Userid: 149 > * - Shell: /sbin/nologin > * - Home: /var/lib/mysqld_exporter > * - Groups: mysqld_exporter > * - GECOS: added by portage for mysqld_exporter > * - Creating /var/lib/mysqld_exporter in / > >>> Unpacking source... > >>> Source unpacked in /var/tmp/portage/app-metrics/mysqld_exporter-0.10.0-r1/work > >>> Preparing source in /var/tmp/portage/app-metrics/mysqld_exporter-0.10.0-r1/work/mysqld_exporter-0.10.0 ... > >>> Source prepared. > >>> Configuring source in /var/tmp/portage/app-metrics/mysqld_exporter-0.10.0-r1/work/mysqld_exporter-0.10.0 ... > >>> Source configured. > >>> Compiling source in /var/tmp/portage/app-metrics/mysqld_exporter-0.10.0-r1/work/mysqld_exporter-0.10.0 ... > /var/tmp/portage/app-metrics/mysqld_exporter-0.10.0-r1/work/mysqld_exporter-0.10.0/src/github.com/prometheus/mysqld_exporter /var/tmp/portage/app-metrics/mysqld_exporter-0.10.0-r1/work/mysqld_exporter-0.10.0 > Using config file: /var/tmp/portage/app-metrics/mysqld_exporter-0.10.0-r1/work/mysqld_exporter-0.10.0/src/github.com/prometheus/mysqld_exporter/.promu.yml > > mysqld_exporter > + go build -o bin/mysqld_exporter -ldflags -X github.com/prometheus/mysqld_exporter/vendor/github.com/prometheus/common/version.Version=0.10.0 -X github.com/prometheus/mysqld_exporter/vendor/github.com/prometheus/common/version.Revision=8068006 -X github.com/prometheus/mysqld_exporter/vendor/github.com/prometheus/common/version.Branch=non-git -X github.com/prometheus/mysqld_exporter/vendor/github.com/prometheus/common/version.BuildUser=portage@vm-gentoo-x64 -X github.com/prometheus/mysqld_exporter/vendor/github.com/prometheus/common/version.BuildDate=20181009-11:51:40 -extldflags '-static' -a -tags netgo github.com/prometheus/mysqld_exporter > /var/tmp/portage/app-metrics/mysqld_exporter-0.10.0-r1/work/mysqld_exporter-0.10.0 > >>> Source compiled. > >>> Test phase [not enabled]: app-metrics/mysqld_exporter-0.10.0-r1 > > >>> Install mysqld_exporter-0.10.0-r1 into /var/tmp/portage/app-metrics/mysqld_exporter-0.10.0-r1/image/ category app-metrics > /var/tmp/portage/app-metrics/mysqld_exporter-0.10.0-r1/work/mysqld_exporter-0.10.0/src/github.com/prometheus/mysqld_exporter /var/tmp/portage/app-metrics/mysqld_exporter-0.10.0-r1/work/mysqld_exporter-0.10.0 > /var/tmp/portage/app-metrics/mysqld_exporter-0.10.0-r1/work/mysqld_exporter-0.10.0 > >>> Completed installing mysqld_exporter-0.10.0-r1 into /var/tmp/portage/app-metrics/mysqld_exporter-0.10.0-r1/image/ > > * Final size of build directory: 17656 KiB (17.2 MiB) > * Final size of installed tree: 10996 KiB (10.7 MiB) > > strip: x86_64-pc-linux-gnu-strip --strip-unneeded -R .comment -R .GCC.command.line -R .note.gnu.gold-version > usr/bin/mysqld_exporter > > >>> Installing (1 of 1) app-metrics/mysqld_exporter-0.10.0-r1::gentoo > * checking 9 files for package collisions > >>> Merging app-metrics/mysqld_exporter-0.10.0-r1 to / > * Debug: ls -ld /var/tmp/portage/app-metrics/mysqld_exporter-0.10.0-r1/image/var/lib/mysqld_exporter > drwxrwx--- 2 mysqld_exporter mysqld_exporter 4096 Oct 9 13:51 /var/tmp/portage/app-metrics/mysqld_exporter-0.10.0-r1/image/var/lib/mysqld_exporter > --- /var/ > --- /var/lib/ > --- /var/lib/mysqld_exporter/ > >>> /var/lib/mysqld_exporter/.keep_app-metrics_mysqld_exporter-0 > --- /var/log/ > --- /var/log/mysqld_exporter/ > >>> /var/log/mysqld_exporter/.keep_app-metrics_mysqld_exporter-0 > --- /usr/ > --- /usr/bin/ > >>> /usr/bin/mysqld_exporter > --- /usr/share/ > --- /usr/share/doc/ > --- /usr/share/doc/mysqld_exporter-0.10.0-r1/ > >>> /usr/share/doc/mysqld_exporter-0.10.0-r1/CONTRIBUTING.md.bz2 > >>> /usr/share/doc/mysqld_exporter-0.10.0-r1/CHANGELOG.md.bz2 > >>> /usr/share/doc/mysqld_exporter-0.10.0-r1/README.md.bz2 > --- /etc/ > --- /etc/init.d/ > >>> /etc/init.d/mysqld_exporter > --- /etc/conf.d/ > >>> /etc/conf.d/mysqld_exporter > --- /etc/logrotate.d/ > >>> /etc/logrotate.d/mysqld_exporter > >>> Safely unmerging already-installed instance... > No package files given... Grabbing a set. > --- replaced obj /var/log/mysqld_exporter/.keep_app-metrics_mysqld_exporter-0 > --- replaced dir /var/log/mysqld_exporter > --- replaced dir /var/log > --- replaced obj /var/lib/mysqld_exporter/.keep_app-metrics_mysqld_exporter-0 > --- replaced dir /var/lib/mysqld_exporter > --- replaced dir /var/lib > --- replaced dir /var > --- replaced obj /usr/share/doc/mysqld_exporter-0.10.0-r1/README.md.bz2 > --- replaced obj /usr/share/doc/mysqld_exporter-0.10.0-r1/CONTRIBUTING.md.bz2 > --- replaced obj /usr/share/doc/mysqld_exporter-0.10.0-r1/CHANGELOG.md.bz2 > --- replaced dir /usr/share/doc/mysqld_exporter-0.10.0-r1 > --- replaced dir /usr/share/doc > --- replaced dir /usr/share > --- replaced obj /usr/bin/mysqld_exporter > --- replaced dir /usr/bin > --- replaced dir /usr > --- replaced obj /etc/logrotate.d/mysqld_exporter > --- replaced dir /etc/logrotate.d > --- replaced obj /etc/init.d/mysqld_exporter > --- replaced dir /etc/init.d > --- replaced obj /etc/conf.d/mysqld_exporter > --- replaced dir /etc/conf.d > --- replaced dir /etc > >>> Regenerating /etc/ld.so.cache... > >>> Original instance of package unmerged safely. > >>> app-metrics/mysqld_exporter-0.10.0-r1 merged. > >>> Auto-cleaning packages... > > >>> No outdated packages were found on your system. > > * GNU info directory index is up-to-date. > vm-gentoo-x64 ~ # ls -ld /var/lib/mysqld_exporter > drwxr-xr-x 2 mysqld_exporter root 4096 Oct 9 13:51 /var/lib/mysqld_exporter ...and that's unexpected: Like shown above, the ownership of "/var/lib/mysqld_exporter" was set to mysqld_exporter:mysqld_exporter but when merged to $ROOT, group ownership was lost. Second run. First we verify that user/group exists and remove "/var/lib/mysqld_exporter" to allow new permission/ownership when the new install will be merged to $ROOT: > vm-gentoo-x64 ~ # id mysqld_exporter > uid=149(mysqld_exporter) gid=972(mysqld_exporter) groups=972(mysqld_exporter) > vm-gentoo-x64 ~ # rm /var/lib/mysqld_exporter/ -rf > vm-gentoo-x64 ~ # emerge -1 app-metrics/mysqld_exporter > > These are the packages that would be merged, in order: > > Calculating dependencies... done! > [ebuild R ] app-metrics/mysqld_exporter-0.10.0-r1::gentoo 0 KiB > > Total: 1 package (1 reinstall), Size of downloads: 0 KiB > > > >>> Verifying ebuild manifests > > >>> Emerging (1 of 1) app-metrics/mysqld_exporter-0.10.0-r1::gentoo > * mysqld_exporter-0.10.0.tar.gz BLAKE2B SHA512 size ;-) ... [ ok ] > >>> Unpacking source... > >>> Source unpacked in /var/tmp/portage/app-metrics/mysqld_exporter-0.10.0-r1/work > >>> Preparing source in /var/tmp/portage/app-metrics/mysqld_exporter-0.10.0-r1/work/mysqld_exporter-0.10.0 ... > >>> Source prepared. > >>> Configuring source in /var/tmp/portage/app-metrics/mysqld_exporter-0.10.0-r1/work/mysqld_exporter-0.10.0 ... > >>> Source configured. > >>> Compiling source in /var/tmp/portage/app-metrics/mysqld_exporter-0.10.0-r1/work/mysqld_exporter-0.10.0 ... > /var/tmp/portage/app-metrics/mysqld_exporter-0.10.0-r1/work/mysqld_exporter-0.10.0/src/github.com/prometheus/mysqld_exporter /var/tmp/portage/app-metrics/mysqld_exporter-0.10.0-r1/work/mysqld_exporter-0.10.0 > Using config file: /var/tmp/portage/app-metrics/mysqld_exporter-0.10.0-r1/work/mysqld_exporter-0.10.0/src/github.com/prometheus/mysqld_exporter/.promu.yml > > mysqld_exporter > + go build -o bin/mysqld_exporter -ldflags -X github.com/prometheus/mysqld_exporter/vendor/github.com/prometheus/common/version.Version=0.10.0 -X github.com/prometheus/mysqld_exporter/vendor/github.com/prometheus/common/version.Revision=8068006 -X github.com/prometheus/mysqld_exporter/vendor/github.com/prometheus/common/version.Branch=non-git -X github.com/prometheus/mysqld_exporter/vendor/github.com/prometheus/common/version.BuildUser=portage@vm-gentoo-x64 -X github.com/prometheus/mysqld_exporter/vendor/github.com/prometheus/common/version.BuildDate=20181009-11:52:18 -extldflags '-static' -a -tags netgo github.com/prometheus/mysqld_exporter > /var/tmp/portage/app-metrics/mysqld_exporter-0.10.0-r1/work/mysqld_exporter-0.10.0 > >>> Source compiled. > >>> Test phase [not enabled]: app-metrics/mysqld_exporter-0.10.0-r1 > > >>> Install mysqld_exporter-0.10.0-r1 into /var/tmp/portage/app-metrics/mysqld_exporter-0.10.0-r1/image/ category app-metrics > /var/tmp/portage/app-metrics/mysqld_exporter-0.10.0-r1/work/mysqld_exporter-0.10.0/src/github.com/prometheus/mysqld_exporter /var/tmp/portage/app-metrics/mysqld_exporter-0.10.0-r1/work/mysqld_exporter-0.10.0 > /var/tmp/portage/app-metrics/mysqld_exporter-0.10.0-r1/work/mysqld_exporter-0.10.0 > >>> Completed installing mysqld_exporter-0.10.0-r1 into /var/tmp/portage/app-metrics/mysqld_exporter-0.10.0-r1/image/ > > * Final size of build directory: 17656 KiB (17.2 MiB) > * Final size of installed tree: 10996 KiB (10.7 MiB) > > strip: x86_64-pc-linux-gnu-strip --strip-unneeded -R .comment -R .GCC.command.line -R .note.gnu.gold-version > usr/bin/mysqld_exporter > > >>> Installing (1 of 1) app-metrics/mysqld_exporter-0.10.0-r1::gentoo > * checking 9 files for package collisions > >>> Merging app-metrics/mysqld_exporter-0.10.0-r1 to / > * Debug: ls -ld /var/tmp/portage/app-metrics/mysqld_exporter-0.10.0-r1/image/var/lib/mysqld_exporter > drwxrwx--- 2 mysqld_exporter mysqld_exporter 4096 Oct 9 13:52 /var/tmp/portage/app-metrics/mysqld_exporter-0.10.0-r1/image/var/lib/mysqld_exporter > --- /var/ > --- /var/lib/ > >>> /var/lib/mysqld_exporter/ > >>> /var/lib/mysqld_exporter/.keep_app-metrics_mysqld_exporter-0 > --- /var/log/ > --- /var/log/mysqld_exporter/ > >>> /var/log/mysqld_exporter/.keep_app-metrics_mysqld_exporter-0 > --- /usr/ > --- /usr/bin/ > >>> /usr/bin/mysqld_exporter > --- /usr/share/ > --- /usr/share/doc/ > --- /usr/share/doc/mysqld_exporter-0.10.0-r1/ > >>> /usr/share/doc/mysqld_exporter-0.10.0-r1/CONTRIBUTING.md.bz2 > >>> /usr/share/doc/mysqld_exporter-0.10.0-r1/CHANGELOG.md.bz2 > >>> /usr/share/doc/mysqld_exporter-0.10.0-r1/README.md.bz2 > --- /etc/ > --- /etc/init.d/ > >>> /etc/init.d/mysqld_exporter > --- /etc/conf.d/ > >>> /etc/conf.d/mysqld_exporter > --- /etc/logrotate.d/ > >>> /etc/logrotate.d/mysqld_exporter > >>> Safely unmerging already-installed instance... > No package files given... Grabbing a set. > --- replaced obj /var/log/mysqld_exporter/.keep_app-metrics_mysqld_exporter-0 > --- replaced dir /var/log/mysqld_exporter > --- replaced dir /var/log > --- replaced obj /var/lib/mysqld_exporter/.keep_app-metrics_mysqld_exporter-0 > --- replaced dir /var/lib/mysqld_exporter > --- replaced dir /var/lib > --- replaced dir /var > --- replaced obj /usr/share/doc/mysqld_exporter-0.10.0-r1/README.md.bz2 > --- replaced obj /usr/share/doc/mysqld_exporter-0.10.0-r1/CONTRIBUTING.md.bz2 > --- replaced obj /usr/share/doc/mysqld_exporter-0.10.0-r1/CHANGELOG.md.bz2 > --- replaced dir /usr/share/doc/mysqld_exporter-0.10.0-r1 > --- replaced dir /usr/share/doc > --- replaced dir /usr/share > --- replaced obj /usr/bin/mysqld_exporter > --- replaced dir /usr/bin > --- replaced dir /usr > --- replaced obj /etc/logrotate.d/mysqld_exporter > --- replaced dir /etc/logrotate.d > --- replaced obj /etc/init.d/mysqld_exporter > --- replaced dir /etc/init.d > --- replaced obj /etc/conf.d/mysqld_exporter > --- replaced dir /etc/conf.d > --- replaced dir /etc > >>> Regenerating /etc/ld.so.cache... > >>> Original instance of package unmerged safely. > >>> app-metrics/mysqld_exporter-0.10.0-r1 merged. > >>> Auto-cleaning packages... > > >>> No outdated packages were found on your system. > > * GNU info directory index is up-to-date. > vm-gentoo-x64 ~ # ls -ld /var/lib/mysqld_exporter > drwxrwx--- 2 mysqld_exporter mysqld_exporter 4096 Oct 9 13:52 /var/lib/mysqld_exporter ...and this time everything worked like expected. Tested with latest portage git master.
Bug 396153 proposes a PMS extension that will allow users to persistently override directory permissions when necessary. Also, I'm planning a FEATURES=overwrite-dir-perms setting, see bug 654138. *** This bug has been marked as a duplicate of bug 141619 ***
