Re: Luminous: ceph mgr crate error - mon disconnected

[Mark Kirkwood <mark.kirkwood@xxxxxxxxxxxxxxx>]

On 22/07/17 23:50, Oscar Segarra wrote:

> Hi,
>
> I have upgraded from kraken version with a simple "yum upgrade 
> command". Later the upgrade, I'd like to deploy the mgr daemon on one 
> node of my ceph infrastrucute.
>
> But, for any reason, It gets stuck!
>
> Let's see the complete set of commands:
>
>
> [root@vdicnode01 ~]# ceph -s
>   cluster:
>     id:     656e84b2-9192-40fe-9b81-39bd0c7a3196
>     health: HEALTH_WARN
> *            no active mgr*
>
>   services:
>     mon: 1 daemons, quorum vdicnode01
>     mgr: no daemons active
>     osd: 2 osds: 2 up, 2 in
>
>   data:
>     pools:   0 pools, 0 pgs
>     objects: 0 objects, 0 bytes
>     usage:   0 kB used, 0 kB / 0 kB avail
>     pgs:
>
> [root@vdicnode01 ~]# su - vdicceph
> Last login: Sat Jul 22 12:50:38 CEST 2017 on pts/0
> [vdicceph@vdicnode01 ~]$ cd ceph
>
> *[vdicceph@vdicnode01 ceph]$ ceph-deploy --username vdicceph -v mgr 
> create vdicnode02.local*
> [ceph_deploy.conf][DEBUG ] found configuration file at: 
> /home/vdicceph/.cephdeploy.conf
> [ceph_deploy.cli][INFO  ] Invoked (1.5.38): /bin/ceph-deploy 
> --username vdicceph -v mgr create vdicnode02.local
> [ceph_deploy.cli][INFO  ] ceph-deploy options:
> [ceph_deploy.cli][INFO  ]  username                      : vdicceph
> [ceph_deploy.cli][INFO  ]  verbose                       : True
> [ceph_deploy.cli][INFO  ]  mgr                           : 
> [('vdicnode02.local', 'vdicnode02.local')]
> [ceph_deploy.cli][INFO  ]  overwrite_conf                : False
> [ceph_deploy.cli][INFO  ]  subcommand                    : create
> [ceph_deploy.cli][INFO  ]  quiet                         : False
> [ceph_deploy.cli][INFO  ]  cd_conf                       : 
> <ceph_deploy.conf.cephdeploy.Conf instance at 0x164f290>
> [ceph_deploy.cli][INFO  ]  cluster                       : ceph
> [ceph_deploy.cli][INFO  ]  func                          : <function 
> mgr at 0x15db848>
> [ceph_deploy.cli][INFO  ]  ceph_conf                     : None
> [ceph_deploy.cli][INFO  ]  default_release               : False
> [ceph_deploy.mgr][DEBUG ] Deploying mgr, cluster ceph hosts 
> vdicnode02.local:vdicnode02.local
> [vdicnode02.local][DEBUG ] connection detected need for sudo
> [vdicnode02.local][DEBUG ] connected to host: vdicceph@vdicnode02.local
> [vdicnode02.local][DEBUG ] detect platform information from remote host
> [vdicnode02.local][DEBUG ] detect machine type
> [ceph_deploy.mgr][INFO  ] Distro info: CentOS Linux 7.3.1611 Core
> [ceph_deploy.mgr][DEBUG ] remote host will use systemd
> [ceph_deploy.mgr][DEBUG ] deploying mgr bootstrap to vdicnode02.local
> [vdicnode02.local][DEBUG ] write cluster configuration to 
> /etc/ceph/{cluster}.conf
> [vdicnode02.local][DEBUG ] create path if it doesn't exist
> [vdicnode02.local][INFO  ] Running command: sudo ceph --cluster ceph 
> --name client.bootstrap-mgr --keyring 
> /var/lib/ceph/bootstrap-mgr/ceph.keyring auth get-or-create 
> mgr.vdicnode02.local mon allow profile mgr osd allow * mds allow * -o 
> /var/lib/ceph/mgr/ceph-vdicnode02.local/keyring
> [vdicnode02.local][WARNIN] No data was received after 300 seconds, 
> disconnecting...
> [vdicnode02.local][INFO  ] Running command: sudo systemctl enable 
> ceph-mgr@vdicnode02.local
> [vdicnode02.local][WARNIN] Created symlink from 
> /etc/systemd/system/ceph-mgr.target.wants/ceph-mgr@vdicnode02.local.service 
> to /usr/lib/systemd/system/ceph-mgr@.service.
> [vdicnode02.local][INFO  ] Running command: sudo systemctl start 
> ceph-mgr@vdicnode02.local
> [vdicnode02.local][INFO  ] Running command: sudo systemctl enable 
> ceph.target
>
> *[vdicceph@vdicnode01 ceph]$ sudo ceph -s --verbose --watch-warn 
> --watch-error*
> parsed_args: Namespace(admin_socket=None, admin_socket_nope=None, 
> cephconf=None, client_id=None, client_name=None, cluster=None, 
> cluster_timeout=None, completion=False, help=False, input_file=None, 
> output_file=None, output_format=None, status=True, verbose=True, 
> version=False, watch=False, watch_channel='cluster', 
> watch_debug=False, watch_error=True, watch_info=False, 
> watch_sec=False, watch_warn=True), childargs: []
>
> < no response for ever >
>
> Anybody has experienced the same issue? how can I make my ceph work again?
>
> Thanks a lot.

I've encountered this (upgrading from Jewel).

The cause seems to be a busted mgr bootstrap key (see below). Simply 
restarting your Ceph mons *should* get you back to functioning (mon has 
hung as the key is too short), then you can fix the key and deploy a mgr 
(here's my example for deploying a mgr on my host ceph1):

$ sudo ceph auth get client.bootstrap-mgr
exported keyring for client.bootstrap-mgr
[client.bootstrap-mgr]
        key = AAAAAAAAAAAAAAAA
        caps mon = "allow profile bootstrap-mgr"


So destroy and recreate it:


$ sudo ceph auth del client.bootstrap-mgr
updated

$ sudo ceph auth get-or-create client.bootstrap-mgr mon 'allow profile 
bootstrap-mgr'
[client.bootstrap-mgr]
        key = AQBDenFZW7yKJxAAYlSBQLtDADIzsnfBcdxHpg==

$ ceph-deploy -v gatherkeys ceph1
$ ceph-deploy -v mgr create ceph1


regards

Mark


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