krbd / kcephfs - jewel client features question

[Lei Liu <liul.stone@xxxxxxxxx>]

Hi Cephers,

We have some ceph clusters in 12.2.x version, now we want to use upmap balancer，but when i set set-require-min-compat-client to luminous, it's failed

# ceph osd set-require-min-compat-client luminous
Error EPERM: cannot set require_min_compat_client to luminous: 6 connected client(s) look like jewel (missing 0xa00000000200000); 1 connected client(s) look like jewel (missing 0x800000000000000); 1 connected client(s) look like jewel (missing 0x800000000200000); add --yes-i-really-mean-it to do it anyway

ceph features

"client": {
        "group": {
            "features": "0x40106b84a842a52",
            "release": "jewel",
            "num": 6
        },
        "group": {
            "features": "0x7010fb86aa42ada",
            "release": "jewel",
            "num": 1
        },
        "group": {
            "features": "0x7fddff8ee84bffb",
            "release": "jewel",
            "num": 1
        },
        "group": {
            "features": "0x3ffddff8eea4fffb",
            "release": "luminous",
            "num": 7
        }
    }

and sessions

"MonSession(unknown.0 10.10.100.6:0/1603916368 is open allow *, features 0x40106b84a842a52 (jewel))",
"MonSession(unknown.0 10.10.100.2:0/2484488531 is open allow *, features 0x40106b84a842a52 (jewel))",
"MonSession(client.? 10.10.100.6:0/657483412 is open allow *, features 0x7fddff8ee84bffb (jewel))",
"MonSession(unknown.0 10.10.14.67:0/500706582 is open allow *, features 0x7010fb86aa42ada (jewel))"

can i use --yes-i-really-mean-it to force enable it ? 

I know kernel 4.13 is full support with ceph luminous and I know that Redhat backports a lot of things to the 3.10 kernel, So which is the matching version?

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