units: increase watchdog timeout to 3min for all our services Apparently, disk IO issues are more frequent than we hope, and 1min waiting for disk IO happens, so let's increase the watchdog timeout a bit, for all our services. See #1353 for an example where this triggers.

units: set KillMode=mixed for our daemons that fork worker processes The daemons should really have the time to kill the workers first, before systemd does it, hence use KillMode=mixed for these daemons. https://bugs.freedesktop.org/show_bug.cgi?id=90051

importd: add CAP_DAC_OVERRIDE capability Fedora's filesystem package ships /usr/bin (and other directories) which are not writable by its owner. machinectl pull-dkr (and possibly others) are not able to extract those: 14182 mkdirat(3, "usr", 0700) = 0 14182 mkdirat(3, "usr/bin", 0500) = 0 14182 openat(3, "usr/bin/[", O_WRONLY|O_CREAT|O_EXCL|O_NOCTTY|O_NONBLOCK|O_CLOEXEC, 0700) = -1 EACCES (Permission denied) ...

importd: create a loopback btrfs file system for /var/lib/machines, if necessary When manipulating container and VM images we need efficient and atomic directory snapshots and file copies, as well as disk quota. btrfs provides this, legacy file systems do not. Hence, implicitly create a loopback file system in /var/lib/machines.raw and mount it to /var/lib/machines, if that directory is not on btrfs anyway. This is done implicitly and transparently the first time the user invokes "machinectl import-xyz". This allows us to take benefit of btrfs features for container management without actually having the rest of the system use btrfs. The loopback is sized 500M initially. Patches to grow it dynamically are to follow.

Revert "units: add SecureBits" This reverts commit 6a716208b346b742053cfd01e76f76fb27c4ea47. Apparently this doesn't work. http://lists.freedesktop.org/archives/systemd-devel/2015-February/028212.html

units: add SecureBits No setuid programs are expected to be executed, so add SecureBits=noroot noroot-locked to unit files.

importd: run daemon at minimal capabilities

import: introduce new mini-daemon systemd-importd, and make machinectl a client to it The old "systemd-import" binary is now an internal tool. We still use it as asynchronous backend for systemd-importd. Since the import tool might require some IO and CPU resources (due to qcow2 explosion, and decompression), and because we might want to run it with more minimal priviliges we still keep it around as the worker binary to execute as child process of importd. machinectl now has verbs for pulling down images, cancelling them and listing them.