Re: Luminous cluster - how to find out which clients are still jewel?

[Reed Dier <reed.dier@xxxxxxxxxxx>]

Possibly helpful,

If you are able to hit your ceph-mgr dashboard in a web browser, I find it possible to see a table of currently connected cephfs clients, hostnames, state, type (userspace/kernel), and ceph version.

Assuming that the link is persistent, for me the url is ceph-mgr:7000/clients/1/

Or if that fails, the traversal for me from ceph-mgr:7000 is the folder icon in the lefthand menu, the specific filesystem, then in the top left it will say “Filesystem <yourcephfs> /n Clients: ### Detail…”.

The “Detail…” link should lead you to the aforementioned link from above, with a table of all the cephfs clients.

Hopefully thats helpful.

Reed

On May 29, 2018, at 4:42 AM, Paul Emmerich <paul.emmerich@xxxxxxxx> wrote:

https://github.com/ceph/ceph/pull/17535

It's not in Luminous, though.

Paul

2018-05-29 9:41 GMT+02:00 Linh Vu <vul@xxxxxxxxxxxxxx>:

Ah I remember that one, I still have it on my watch list on tracker.ceph.com

Thanks 😊

Alternatively, is there a way to check on a client node what ceph features (jewel, luminous etc.) it has? In our case, it's all CephFS clients, and it's a mix between ceph-fuse (which is Luminous 12.2.5) and kernel client (4.15.x). I suspect the latter is only supporting jewel features but I'd like to confirm. 

---

From: Massimo Sgaravatto <massimo.sgaravatto@xxxxxxxxx>
Sent: Tuesday, 29 May 2018 4:51:56 PM
To: Linh Vu
Cc: ceph-users
Subject: Re: Luminous cluster - how to find out which clients are still jewel?

 

As far as I know the status wrt this issue is still the one reported in this thread:

http://lists.ceph.com/pipermail/ceph-users-ceph.com/2017-September/020585.html

See also:

http://tracker.ceph.com/issues/21315

Cheers, Massimo

On Tue, May 29, 2018 at 8:39 AM, Linh Vu <vul@xxxxxxxxxxxxxx> wrote:

Hi all,

I have a Luminous 12.2.4 cluster. This is what `ceph features` tells me:

...

    "client": {

        "group": {

            "features": "0x7010fb86aa42ada",

            "release": "jewel",

            "num": 257

        },

        "group": {

            "features": "0x1ffddff8eea4fffb",

            "release": "luminous",

            "num": 820

        }

    }

...

How do I find out which clients (IP/hostname/IDs) are actually on jewel feature set?

Regards,

Linh

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Paul Emmerich

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