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Chapter 3. Verifying successful CephFS through NFS deployment

When you deploy CephFS through NFS as a back end of the Shared File Systems service (manila), you add the following new elements to the overcloud environment:

  • StorageNFS network
  • Ceph MDS service on the controllers
  • NFS-Ganesha service on the controllers

For more information about using the Shared File Systems service with CephFS through NFS, see Shared File Systems service in the Storage Guide.

As the cloud administrator, you must verify the stability of the CephFS through NFS environment before you make it available to service users.

3.1. Verifying creation of isolated StorageNFS network
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The network_data_ganesha.yaml file used to deploy CephFS through NFS as a Shared File Systems service back end creates the StorageNFS VLAN. Complete the following steps to verify the existence of the isolated StorageNFS network.

Prerequisites

Procedure

  1. Log in to one of the controllers in the overcloud.

  2. Enter the following command to check the connected networks and verify the existence of the VLAN as set in network_data_ganesha.yaml: 

    $ ip a
15: vlan310: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UNKNOWN group default qlen 1000
    link/ether 32:80:cf:0e:11:ca brd ff:ff:ff:ff:ff:ff
    inet 172.16.4.4/24 brd 172.16.4.255 scope global vlan310
       valid_lft forever preferred_lft forever
    inet 172.16.4.7/32 brd 172.16.4.255 scope global vlan310
       valid_lft forever preferred_lft forever
    inet6 fe80::3080:cfff:fe0e:11ca/64 scope link
       valid_lft forever preferred_lft forever
    Copy to Clipboard Toggle word wrap

3.2. Verifying Ceph MDS service
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Use the systemctl status command to verify the Ceph MDS service status.

Procedure

  • Enter the following command on all Controller nodes to check the status of the MDS container: 

    $ systemctl status ceph-mds<@CONTROLLER-HOST>
    Copy to Clipboard Toggle word wrap

    Example: 

$ systemctl status ceph-mds@controller-0.service

ceph-mds@controller-0.service - Ceph MDS
   Loaded: loaded (/etc/systemd/system/ceph-mds@.service; enabled; vendor preset: disabled)
   Active: active (running) since Tue 2018-09-18 20:11:53 UTC; 6 days ago
 Main PID: 65066 (conmon)
   Tasks: 16 (limit: 204320)
   Memory: 38.2M
   CGroup: /system.slice/system-ceph\x2dmds.slice/ceph-mds@controller-0.service
         └─60921 /usr/bin/podman run --rm --net=host --memory=32000m --cpus=4 -v
/var/lib/ceph:/var/lib/ceph:z -v /etc/ceph:/etc/ceph:z -v
/var/run/ceph:/var/run/ceph:z -v /etc/localtime:/etc/localtime:ro>
Copy to Clipboard Toggle word wrap

3.3. Verifying Ceph cluster status
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Complete the following steps to verify Ceph cluster status.

Procedure

  1. Log in to the active Controller node.

  2. Enter the following command: 

    $ sudo ceph -s

cluster:
    id: 3369e280-7578-11e8-8ef3-801844eeec7c
    health: HEALTH_OK

  services:
    mon: 3 daemons, quorum overcloud-controller-1,overcloud-controller-2,overcloud-controller-0
    mgr: overcloud-controller-1(active), standbys: overcloud-controller-2, overcloud-controller-0
    mds: cephfs-1/1/1 up  {0=overcloud-controller-0=up:active}, 2 up:standby
    osd: 6 osds: 6 up, 6 in
    Copy to Clipboard Toggle word wrap
    Result
    There is one active MDS and two MDSs on standby.

  3. To check the status of the Ceph file system in more detail, enter the following command and replace <cephfs> with the name of the Ceph file system: 

    $ sudo ceph fs ls

name: cephfs, metadata pool: manila_metadata, data pools: [manila_data]
    Copy to Clipboard Toggle word wrap

3.4. Verifying NFS-Ganesha and manila-share service status
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Complete the following step to verify the status of NFS-Ganesha and manila-share service.

Procedure

  1. Enter the following command from one of the Controller nodes to confirm that ceph-nfs and openstack-manila-share started: 

    $ pcs status

ceph-nfs       (systemd:ceph-nfs@pacemaker):   Started overcloud-controller-1

podman container: openstack-manila-share [192.168.24.1:8787/rhosp-rhel8/openstack-manila-share:pcmklatest]
   openstack-manila-share-podman-0      (ocf::heartbeat:podman):        Started overcloud-controller-1
    Copy to Clipboard Toggle word wrap

3.5. Verifying manila-api services acknowledges scheduler and share services
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Complete the following steps to confirm the manila-api service acknowledges the scheduler and share services.

Procedure

  1. Log in to the undercloud.

  2. Enter the following command: 

    $ source /home/stack/overcloudrc
    Copy to Clipboard Toggle word wrap

  3. Enter the following command to confirm manila-scheduler and manila-share are enabled: 

    $ manila service-list

| Id | Binary          | Host             | Zone | Status | State | Updated_at |

| 2 | manila-scheduler | hostgroup        | nova | enabled | up | 2018-08-08T04:15:03.000000 |
| 5 | manila-share | hostgroup@cephfs | nova | enabled | up | 2018-08-08T04:15:03.000000 |
    Copy to Clipboard Toggle word wrap
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