Hello! I've got a weird situation with rdb drive image reliability. I found that after hard-reset VM with ceph rbd drive from my new cluster become corrupted. I accidentally found it during HA tests of my new cloud cluster: after host reset VM was not able to boot again because of the virtual drive errors. The same result will be if you just kill qemu process (like would happened at host crash time).
First of all I thought it is a guest OS problem. But then I tried RouterOS (linux based), Linux, FreeBSD - all options show the same behavior. Then I blamed OpenNebula installation. For the test sake I've installed the latest Proxmox (5.1-36) to another server. The first subtest: I've created a VM in OpenNebula from predefined image, shut it down, then create Proxmox VM and pointed it to the image was created from OpenNebula. The second subtest: I've made a clean install from ISO with from Proxmox console, having previously created from Proxmox VM and drive image (of course, on the same ceph pool). Both results: unbootable VMs. Finally I've made a clean install to the fresh VM with local LVM-backed drive image. And - guess what? - it survived qemu process kill. This is the first situation of this kind in my practice so I would like to ask for guidance. I believe that it is a cache problem of some kind, but I haven't faced it with earlier releases. Some cluster details: It's a small test cluster with 4 nodes, each has: 2x CPU E5-2665, 128GB RAM 1 OSD with Samsung sm863 1.92TB drive IB connection with IPoIB on QDR IB network OS: Ubuntu 16.04 with 4.10 kernel ceph: luminous 12.2.1 Client (kvm host) OSes: 1. Ubuntu 16.04 (the same hosts as ceph cluster) 2. Debian 9.1 in case of Proxmox *ceph.conf:* [global] fsid = 6a8ffc55-fa2e-48dc-a71c-647e1fff749b public_network = 10.103.0.0/16 cluster_network = 10.104.0.0/16 mon_initial_members = e001n01, e001n02, e001n03 mon_host = 10.103.0.1,10.103.0.2,10.103.0.3 rbd default format = 2 auth_cluster_required = cephx auth_service_required = cephx auth_client_required = cephx osd mount options = rw,noexec,nodev,noatime,nodiratime,nobarrier osd mount options xfs = rw,noexec,nodev,noatime,nodiratime,nobarrier osd_mkfs_type = xfs bluestore fsck on mount = true debug_lockdep = 0/0 debug_context = 0/0 debug_crush = 0/0 debug_buffer = 0/0 debug_timer = 0/0 debug_filer = 0/0 debug_objecter = 0/0 debug_rados = 0/0 debug_rbd = 0/0 debug_journaler = 0/0 debug_objectcatcher = 0/0 debug_client = 0/0 debug_osd = 0/0 debug_optracker = 0/0 debug_objclass = 0/0 debug_filestore = 0/0 debug_journal = 0/0 debug_ms = 0/0 debug_monc = 0/0 debug_tp = 0/0 debug_auth = 0/0 debug_finisher = 0/0 debug_heartbeatmap = 0/0 debug_perfcounter = 0/0 debug_asok = 0/0 debug_throttle = 0/0 debug_mon = 0/0 debug_paxos = 0/0 debug_rgw = 0/0 [osd] osd op threads = 4 osd disk threads = 2 osd max backfills = 1 osd recovery threads = 1 osd recovery max active = 1 -- Best regards, Vladimir
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