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Need help configuring NFS as cinder's back end

asked 2017-11-28 14:06:25 -0500

jcorkey gravatar image

updated 2017-11-28 15:12:07 -0500

I deployed openstack using one control node and one compute node. I have enabled cinder but I am having issues with getting the back end of cinder working. I am not very familiar with cinder or NFS but I was following the steps for using NFS as the back end at the link below: https://docs.openstack.org/kolla-ansible/latest/reference/cinder-guide.html

I followed all the steps from that documentation. I was planning to try and use my control node as the storage node.

I have tested that NFS works apart from cinder on the control and compute by the following steps:

  • I have install nfs-utils on my compute and control node and started nfs.
  • I added an entry for a directory named /home to the /etc/exports on the control node
  • I then create a directory called nfs_home on my compute node and then mount nfs_home to the /home on my control node (NFS server)

That works and I can add files in /home on control node and see those changes reflected in nfs_home on compute node

I need help with getting NFS to work with cinder and below are the steps I have done but I can't create volumes and get an error.

The /etc/exports on the control node:

/home/cinder_storage    IP_ADDRESS_OF_CONTROL_NODE/24(rw,no_root_squash)

On the deploy host I created an nfs_shares file by doing vi /etc/kolla/config/nfs_shares and added the following line:

IP_ADDRESS_OF_CONTROL_NODE:/home/cinder_storage

Here are what all my cinder related options are set to in my /etc/kolla/globals.yml

    enable_cinder: "yes"
    #enable_cinder_backup: "yes"
    #enable_cinder_backend_hnas_iscsi: "no"
    #enable_cinder_backend_hnas_nfs: "no"
    #enable_cinder_backend_iscsi: "no"
    #enable_cinder_backend_lvm: "no"
    enable_cinder_backend_nfs: "yes"

################################
# Cinder - Block Storage Options
################################
# Enable / disable Cinder backends
#cinder_backend_ceph: "{{ enable_ceph }}"
#cinder_backend_vmwarevc_vmdk: "no"
#cinder_volume_group: "cinder-volumes"

# Valid options are [ nfs, swift, ceph ]
#cinder_backup_driver: "ceph"
#cinder_backup_share: ""
#cinder_backup_mount_options_nfs: ""

I am not sure what to set for the Cinder - Block Storage Options in my globals.yml or if I don't need to change anything there?

If I run cinder service-list I get the following output:

+------------------+----------------------------------------+------+---------+-------+----------------------------+-----------------+
| Binary           | Host                                   | Zone | Status  | State | Updated_at                 | Disabled Reason |
+------------------+----------------------------------------+------+---------+-------+----------------------------+-----------------+
| cinder-backup    | openstackcontroller.glv.internal       | nova | enabled | up    | 2017-11-28T21:08:32.000000 | -               |
| cinder-scheduler | openstackcontroller.glv.internal       | nova | enabled | up    | 2017-11-28T21:08:32.000000 | -               |
| cinder-volume    | openstackcontroller.glv.internal@nfs-1 | nova | enabled | up    | 2017-11-28T21:08:34.000000 | -               |
+------------------+----------------------------------------+------+---------+-------+----------------------------+-----------------+

But when I try to create a new volume I get the following errors:

 ERROR cinder.scheduler.flows.create_volume [req-38257bf8-2ccf-4c06-a324-da7fed5a4828 d77551a2455649a287ed9f1a8871f852 c3a4ae5f4caf46218c592d0b92c593c6 - default default] Failed to run task cinder.scheduler.flows.create_volume.ScheduleCreateVolumeTask;volume:create: No valid backend was found. Exceeded max scheduling attempts 3 for volume None: NoValidBackend: No valid backend was found. Exceeded max scheduling attempts 3 for volume None

2017-11-28 14:18:23.562 39 ERROR cinder.volume.drivers.remotefs [req-9b3fb095-7198-4f46-a4b5-7dcd42c73970 - - - - -] Failed to created Cinder secure environment indicator file: [Errno 13] Permission denied: '/var/lib/cinder/mnt/8804d6b3feed68a301166ec9a566d83d/.cinderSecureEnvIndicator': IOError: [Errno 13] Permission denied: '/var/lib/cinder/mnt/8804d6b3feed68a301166ec9a566d83d/.cinderSecureEnvIndicator'

Am I not setting certain options correctly? I tried following that documentation in the link above but I know ... (more)

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answered 2017-11-28 15:48:59 -0500

jcorkey gravatar image

updated 2017-11-28 16:20:28 -0500

I just chmod 777 /home/cinder_storage on the control node and it is working now

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Asked: 2017-11-28 14:06:25 -0500

Seen: 451 times

Last updated: Nov 28 '17