ceph/systemd/ceph-immutable-object-cache.target

[Unit]
Description=ceph target allowing to start/stop all ceph-immutable-object-cache@.service instances at once
PartOf=ceph.target
Before=ceph.target

[Install]
WantedBy=multi-user.target ceph.target
tools: adding ceph level immutable obj cache daemon The daemon is built for future integration with both RBD and RGW cache. The key components are: - domain socket based simple IPC - simple LRU policy based promotion/demotion for the cache - simple file based caching store for RADOS objs with sync IO interface - systemd service/target files for the daemon Signed-off-by: Dehao Shang <dehao.shang@intel.com> Signed-off-by: Yuan Zhou <yuan.zhou@intel.com> 2018-12-13 21:36:36 +00:00			`[Unit]`
			`Description=ceph target allowing to start/stop all ceph-immutable-object-cache@.service instances at once`
			`PartOf=ceph.target`
			`Before=ceph.target`
systemd: Support Graceful Reboot for AIO Node Ceph AIO installation with single/multiple node is not friendly for loopback mount, especially always get deadlock issue during graceful system reboot. We already have `rbdmap.service` with graceful system reboot friendly as below: [Unit] After=network-online.target Before=remote-fs-pre.target Wants=network-online.target remote-fs-pre.target [Service] ExecStart=/usr/bin/rbdmap map ExecReload=/usr/bin/rbdmap map ExecStop=/usr/bin/rbdmap unmap-all This PR introduce: - `ceph-mon.target`: Ensure startup after `network-online.target` and before `remote-fs-pre.target` - `ceph-*.target`: Ensure startup after `ceph-mon.target` and before `remote-fs-pre.target` - `rbdmap.service`: Once all `_netdev` get unmount by `remote-fs.target`, ensure unmap all RBD BEFORE any Ceph components under `ceph.target` get stopped during shutdown The logic is concept proof by <https://github.com/alvistack/ansible-role-ceph_common/tree/develop>; also works as expected with Ceph + Kubernetes deployment by <https://github.com/alvistack/ansible-collection-kubernetes/tree/develop>. No more deadlock happened during graceful system reboot, both AIO single/multiple no de with loopback mount. Also see: - <https://github.com/ceph/ceph/pull/36776> - <https://github.com/etcd-io/etcd/pull/12259> - <https://github.com/cri-o/cri-o/pull/4128> - <https://github.com/kubernetes/release/pull/1504> Fixes: https://tracker.ceph.com/issues/47528 Signed-off-by: Wong Hoi Sing Edison <hswong3i@gmail.com> 2020-08-25 04:16:54 +00:00
tools: adding ceph level immutable obj cache daemon The daemon is built for future integration with both RBD and RGW cache. The key components are: - domain socket based simple IPC - simple LRU policy based promotion/demotion for the cache - simple file based caching store for RADOS objs with sync IO interface - systemd service/target files for the daemon Signed-off-by: Dehao Shang <dehao.shang@intel.com> Signed-off-by: Yuan Zhou <yuan.zhou@intel.com> 2018-12-13 21:36:36 +00:00			`[Install]`
			`WantedBy=multi-user.target ceph.target`