01

# digging from shell history...

 7138  ceph orch host drain kvm03
 7140  ceph orch host rm kvm03
 7147  ceph orch host rm kvm03 --rm-crush-entry

02

kvm01 ~ # ceph -s
  cluster:
    id:     ac259b5a-455b-11eb-aeec-c2a62b70e62e
    health: HEALTH_WARN
            1 stray host(s) with 1 daemon(s) not managed by cephadm

  services:
    mon: 3 daemons, quorum kvm01,kvm02,kvm05 (age 3w)
    mgr: kvm02.avgdse(active, since 7M), standbys: kvm01.qllkhr
    mds: 1/1 daemons up, 2 standby
    osd: 15 osds: 15 up (since 24m), 15 in (since 25m); 59 remapped pgs
    rgw: 3 daemons active (3 hosts, 1 zones)

kvm01 ~ # ceph health detail
HEALTH_WARN 1 stray host(s) with 1 daemon(s) not managed by cephadm
[WRN] CEPHADM_STRAY_HOST: 1 stray host(s) with 1 daemon(s) not managed by cephadm
    stray host kvm03 has 1 stray daemons: ['mon.kvm02']
    
kvm02 ~ # ps aux | grep kvm03 | grep -v grep
kvm02 ~ #

kvm01 ~ # ceph orch ps | grep -e kvm03 -e mon
mon.kvm01                        kvm01                    running (7M)      3m ago   3y     695M    2048M  19.2.0          37996728e013  9a7037f8f89a
mon.kvm02                        kvm02                    running (5w)      3m ago  14M     516M    2048M  19.2.0          37996728e013  122e45792d05
mon.kvm05                        kvm05                    running (3w)      3m ago   5w     475M    2048M  19.2.0          37996728e013  b01f280f7783

kvm01 ~ # ceph mon dump
epoch 31
fsid ac259b5a-455b-11eb-aeec-c2a62b70e62e
last_changed 2025-04-12T08:44:11.714639+0000
created 2020-12-23T20:17:01.739499+0000
min_mon_release 19 (squid)
election_strategy: 1
0: [v2:10.4.2.31:3300/0,v1:10.4.2.31:6789/0] mon.kvm01
1: [v2:10.4.2.32:3300/0,v1:10.4.2.32:6789/0] mon.kvm02
2: [v2:10.4.2.35:3300/0,v1:10.4.2.35:6789/0] mon.kvm05
dumped monmap epoch 31

kvm01 ~ # ceph node ls
{
    "mon": {
        "kvm01": [
            "kvm01"
        ],
        "kvm02": [
            "kvm02"
        ],
        "kvm05": [
            "kvm05"
        ]
    },
    "osd": {
        "kvm01": [
            6,
            11,
            12,
            13
        ],
        "kvm02": [
            0,
            1,
            8,
            9
        ],
        "kvm05": [
            2,
            3,
            14,
            15
        ],
        "kvm06": [
            4,
            5,
            7
        ]
    },
    "mds": {
        "kvm01": [
            "okd-rook-fs.kvm01.bsklsw"
        ],
        "kvm02": [
            "okd-rook-fs.kvm02.bbydqd"
        ],
        "kvm05": [
            "okd-rook-fs.kvm05.xcygic"
        ]
    },
    "mgr": {
        "kvm01": [
            "kvm01.qllkhr"
        ],
        "kvm02": [
            "kvm02.avgdse"
        ]
    }
}