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If i run : ceph-mon -i cephA-001 --cluster cephA

all is good.

If i use systemd; not good:

root@cephA-001:/var# systemctl start ceph-mon@cephA-001
root@cephA-001:/var#

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- name: get public_ipv4 (Scaleway)
  command: scw-metadata PUBLIC_IP_ADDRESS
  register: result
  when: (physical_ip is not defined and ansible_os_family == "Debian")
  changed_when: false
  ignore_errors: true
  
  Result : 

TASK [tinc : get public_ipv4 (Scaleway)] ***************************************

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root@dnxovh-hy002 (node2):/var/log/lxd/test# cat migration_restore_2016-10-21T00\:15\:59+02\:00.log
(00.000032) File tty[881b:e] will be restored from inherit fd 5
(00.007405) Pagemap is fully functional
(00.007430) TCP recv queue memory limit is 87380
(00.007441) Found task size of 7ffffffff000
(00.007474) cpu: fpu:1 fxsr:1 xsave:1
(00.007543) vdso: Parsing at 7fffae598000 7fffae59a000
(00.007546) vdso: PT_LOAD p_vaddr: 0
(00.007548) vdso: DT_HASH: 120
(00.007550) vdso: DT_STRTAB: 2b0

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root@dnxovh-hy001 (node1):~# lxc move inxovh-db002 node2:inxovh-db002
error: Error transferring container data: migration restore failed
(00.014837) Warn  (cr-restore.c:1159): Set CLONE_PARENT | CLONE_NEWPID but it might cause restore problem,because not all kernels support such clone flags combinations!
(00.018360)      1: Error (cr-restore.c:1489): mkdtemp failed crtools-proc.HEDVxH: Permission denied
(00.030781) Error (cr-restore.c:1352): 23840 killed by signal 9
(00.083173) Error (cr-restore.c:2182): Restoring FAILED.

root@dnxovh-hy001 (node1):~#  lxc list
+--------------+---------+-----------------------+------+------------+-----------+
|     NAME     |  STATE  |         IPV4          | IPV6 |    TYPE    | SNAPSHOTS |

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# cat /etc/freebsd-update.conf
# $FreeBSD: releng/10.2/etc/freebsd-update.conf 258121 2013-11-14 09:14:33Z glebius $

# Trusted keyprint.  Changing this is a Bad Idea unless you've received
# a PGP-signed email from <security-officer@FreeBSD.org> telling you to
# change it and explaining why.
KeyPrint 800651ef4b4c71c27e60786d7b487188970f4b4169cc055784e21eb71d410cc5

# Server or server pool from which to fetch updates.  You can change
# this to point at a specific server if you want, but in most cases

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root@inxovh-hy003 (rbx3):~# sgdisk -t 3:45B0969E-9B03-4F30-B4C6-B4B80CEFF106 /dev/sda

***************************************************************
Found invalid GPT and valid MBR; converting MBR to GPT format
in memory.
***************************************************************


Warning! Secondary partition table overlaps the last partition by
33 blocks!

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root@dnxsys-web001:~ # zfs snapshot -r zdata@snapshot_for_ovh
root@dnxsys-web001:~ # zfs send -R zdata@snapshot_for_ovh | ssh 164.132.147.90 zfs recv -vFd zdata

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root@dnxovh-hy001:~# ceph-deploy uninstall node1 node2
[ceph_deploy.conf][DEBUG ] found configuration file at: /root/.cephdeploy.conf
[ceph_deploy.cli][INFO  ] Invoked (1.5.20): /usr/bin/ceph-deploy uninstall node1 node2
[ceph_deploy.install][INFO  ] note that some dependencies *will not* be removed because they can cause issues with qemu-kvm
[ceph_deploy.install][INFO  ] like: librbd1 and librados2
[ceph_deploy.install][DEBUG ] Uninstalling on cluster ceph hosts node1 node2
[ceph_deploy.install][DEBUG ] Detecting platform for host node1 ...
[node1][DEBUG ] connected to host: node1
[node1][DEBUG ] detect platform information from remote host
[node1][DEBUG ] detect machine type

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Quand on installe Ubuntu 15 avec le manager OVH, l'installation se fait obligatoirement avec un noyau OVH.

Pour repasser en noyau générique :

1/ installer Ubuntu 15 via le manager OVH

2/ Booter sur le kernel OVH (par default)

3/ set un passwd root (nécessaire pour la console plus tard)

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root@alcsys-vm52:~# free
             total       used       free     shared    buffers     cached
Mem:       2058732    1952924     105808      10552      13764     127776
-/+ buffers/cache:    1811384     247348
Swap:       241660     101604     140056

=> 105Mb FREE ??


root@alcsys-vm52:~# atop |grep MEM