fix(dracut): ldd output borked with --sysroot (bsc#1228659)
#362
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dracut-install calls ldd to resolve dependencies, but when the `--sysroot`
option is used, ldd is not performing the search within the sysroot directory.
To fix this issue, the `LD_LIBRARY_PATH` variable needs to be properly set to
the directories containing shared libraries within the specified sysroot
directory.
E.g., running dracut with `--sysroot` produces an initrd without the required
systemd shared libraries when the version between the host system and the
sysroot directory differs:
```
localhost:~ # ldd /.snapshots/9/snapshot/usr/lib/systemd/systemd | grep libsystemd
libsystemd-core-256.so => not found
libsystemd-shared-256.so => not found
localhost:~ # export LD_LIBRARY_PATH=/.snapshots/9/snapshot/usr/lib64/systemd
localhost:~ # ldd /.snapshots/9/snapshot/usr/lib/systemd/systemd | grep libsystemd
libsystemd-core-256.so => /.snapshots/9/snapshot/usr/lib64/systemd/libsystemd-core-256.so (0x00007f817b600000)
libsystemd-shared-256.so => /.snapshots/9/snapshot/usr/lib64/systemd/libsystemd-shared-256.so (0x00007f817b000000)
```
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dracut-install calls ldd to resolve dependencies, but when the
--sysrootoption is used, ldd is not performing the search within the sysroot directory. To fix this issue, theLD_LIBRARY_PATHvariable needs to be properly set to the directories containing shared libraries within the specified sysroot directory.E.g., running dracut with
--sysrootproduces an initrd without the required systemd shared libraries when the version between the host system and the sysroot directory differs:More details on the upstream PR: dracut-ng/dracut-ng#567
We need to fix bsc#1228659 as soon as possible and upstream is not responding at the desired pace (correction for easily offended readers: i.e., at the pace we need specifically with this critical issue that causes a system to be unable to boot after an update).