前面有文章写了使用rook搭建ceph。本文将使用外部的Prometheus健康ceph集群，并提供告警功能。

采集ceph指标

进入到monitoring，执行：

kubectl apply  -f rbac.yaml #必须执行，否则operator会报错的哦
kubectl apply  -f service-monitor.yaml 
kubectl apply  -f exporter-service-monitor.yaml

修改cluster.yaml中的

  monitoring:
    # requires Prometheus to be pre-installed
    enabled: true
    # Whether to disable the metrics reported by Ceph. If false, the prometheus mgr module and Ceph exporter are enabled.
    # If true, the prometheus mgr module and Ceph exporter are both disabled. Default is false.
    metricsDisabled: false

然后验证metric指标

[root@sc-neutral-2 ~]# kubectl -n rook-ceph get svc
NAME                                    TYPE        CLUSTER-IP      EXTERNAL-IP   PORT(S)    AGE
rook-ceph-mgr                           ClusterIP   10.104.175.66   <none>        9283/TCP   9d
rook-ceph-mgr-dashboard                 ClusterIP   10.108.126.89   <none>        8443/TCP   7d4h
rook-ceph-rgw-knowdee-s3-object-store   ClusterIP   10.106.225.66   <none>        9080/TCP   9d
[root@sc-neutral-2 ~]# curl http://10.104.175.66:9283/metrics |more
  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
                                 Dload  Upload   Total   Spent    Left  Speed
  0     0    0     0    0     0      0      0 --:--:-- --:--:-- --:--:--     0
# HELP ceph_health_status Cluster health status
# TYPE ceph_health_status untyped
ceph_health_status 0.0
# HELP ceph_mon_quorum_status Monitors in quorum
# TYPE ceph_mon_quorum_status gauge
ceph_mon_quorum_status{ceph_daemon="mon.a"} 1.0
ceph_mon_quorum_status{ceph_daemon="mon.c"} 1.0
ceph_mon_quorum_status{ceph_daemon="mon.d"} 1.0
# HELP ceph_fs_metadata FS Metadata
# TYPE ceph_fs_metadata untyped
ceph_fs_metadata{data_pools="4",fs_id="1",metadata_pool="3",name="cephfs"} 1.0
# HELP ceph_mds_metadata MDS Metadata
# TYPE ceph_mds_metadata untyped
ceph_mds_metadata{ceph_daemon="mds.cephfs-b",fs_id="1",hostname="sc-neutral-3",public_addr="172.70.10.24:6801/2418714164",rank="0",ceph_version="ceph version 17.2.6 (d7ff0d10654d2280e08f1ab989c7cdf3064
446a5) quincy (stable)"} 1.0
ceph_mds_metadata{ceph_daemon="mds.cephfs-a",fs_id="1",hostname="sc-neutral-1",public_addr="172.70.21.19:6801/2999471209",rank="0",ceph_version="ceph version 17.2.6 (d7ff0d10654d2280e08f1ab989c7cdf3064
446a5) quincy (stable)"} 1.0
# HELP ceph_mon_metadata MON Metadata
.....................................
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很长很长