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Chapter 4. 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

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

4.1. 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

4.2. Verifying Ceph MDS service
Copier lien

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>

    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>

4.3. 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

    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]

4.4. Verifying NFS-Ganesha and manila-share service status
Copier lien

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

Complete the following steps to confirm that 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

  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 |
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