Hi, I upgraded to 10.2.1 and noticed that lttng is a dependency for the RHEL packages in that version. Since I have no intention of doing traces on ceph I find myself wondering why ceph is now requiring these libraries to be installed. Since the lttng packages are not included in RHEL/CentOS 7 I’ll need to pull these in from http://packages.efficios.com/ which is easy enough but I’m not really looking forward to adding and managing another package source for my systems. Anyone have some info on the reasoning behind the dependency ?
Our ceph machines are CentOS 7.2 based. Upon boot of one of the nodes I would like the rbd’s to be mapped automatically. So I tried `sudo systemctl enable rbdmap.service` but it slapped me in the face because: The unit files have no [Install] section. They are not meant to be enabled using systemctl. Possible reasons for having this kind of units are: 1) A unit may be statically enabled by being symlinked from another unit's .wants/ or .requires/ directory. 2) A unit's purpose may be to act as a helper for some other unit which has a requirement dependency on it. 3) A unit may be started when needed via activation (socket, path, timer, D-Bus, udev, scripted systemctl call, ...). I checked the wants of other services, but none of them seems to want rbmap. So it’s not being included anywhere. I’m guessing it should be triggered through udev, but we don’t have the udev rules for cehp working at the moment because of several reasons. I added in the [install] section and it works fine now, but why wouldn’t that be there by default? If an admin wants rbdmap to be run automatically shouldn’t that be possible? Thanks, Max
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