Path /var/lib/nova/mnt is mounted on / but it is not a shared mount

[prameswar]

I am running master branch on ubuntu 14.04

TASK [nova : Starting nova-compute container] **********************************
fatal: [localhost]: FAILED! => {"changed": true, "failed": true, "msg": "'Traceback (most recent call last):\\n File \"/tmp/ansible_orx2Yo/ansible_module_kolla_docker.py\", line 742, in main\\n result = bool(getattr(dw, module.params.get(\\'action\\'))())\\n File \"/tmp/ansible_orx2Yo/ansible_module_kolla_docker.py\", line 572, in start_container\\n self.dc.start(container=self.params.get(\\'name\\'))\\n File \"/usr/local/lib/python2.7/dist-packages/docker/utils/decorators.py\", line 21, in wrapped\\n return f(self, resource_id, *args, **kwargs)\\n File \"/usr/local/lib/python2.7/dist-packages/docker/api/container.py\", line 363, in start\\n self._raise_for_status(res)\\n File \"/usr/local/lib/python2.7/dist-packages/docker/client.py\", line 146, in _raise_for_status\\n raise errors.APIError(e, response, explanation=explanation)\\nAPIError: 500 Server Error: Internal Server Error (\"{\"message\":\"linux mounts: Path /var/lib/nova/mnt is mounted on / but it is not a shared mount.\"}\")\\n'"}
 to retry, use: --limit @/home/vagrant/kolla-ansible/ansible/site.retry

PLAY RECAP *********************************************************************
localhost : ok=157 changed=1 unreachable=0 failed=1

Command failed ansible-playbook -i ansible/inventory/all-in-one -e @/etc/kolla/globals.yml -e @/etc/kolla/passwords.yml -e CONFIG_DIR=/etc/kolla -e action=deploy /home/vagrant/kolla-ansible/ansible/site.yml

solution:

file /home/vagrant/kolla-ansible/ansible/roles/nova/tasks/start_compute.yml either contain
below line:
      - "/var/lib/nova/mnt/:/var/lib/nova/mnt/"
instead of:
      - "/var/lib/nova/mnt/:/var/lib/nova/mnt/:shared"

if it is required then this volume should be "shared". we have to make it shared like /run:

mount --make-shared /run

in documentation. for that this should be /var/lib/nova/mnt/ partition.

any suggestion appreciated :)

[Jeffrey Zhang (jeffrey4l)]

 try this
<Jeffrey4l>30 mkdir /var/lib/nova/mnt /var/lib/nova/mnt2
<Jeffrey4l>30 mount --bind /var/lib/nova/mnt2 /var/lib/nova/mnt
<Jeffrey4l>30 mount --make-shared /var/lib/nova/mnt
<Jeffrey4l>30 prameswar, ^^ then it should work. ( i do not know why :( )
<Jeffrey4l>30 prameswar, learned from https://www.kernel.org/doc/Documentation/filesystems/sharedsubtree.txt

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/402191

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/402191
Committed: https://git.openstack.org/cgit/openstack/kolla/commit/?id=67935c4ea406dfd04a08c0bc85f3fe59a0b05540
Submitter: Jenkins
Branch: master

commit 67935c4ea406dfd04a08c0bc85f3fe59a0b05540
Author: prameswar <email address hidden>
Date: Fri Nov 25 00:15:06 2016 +0530

    shared mount added for /var/lib/nova/mnt to QSG

    Closes-bug: #1644602

    Change-Id: I35f080f118864be4b09f692b9f90c7635b46a75c

[OpenStack Infra (hudson-openstack)]

This issue was fixed in the openstack/kolla 4.0.0.0b2 development milestone.

[OpenStack Infra (hudson-openstack)]

This issue was fixed in the openstack/kolla-ansible 4.0.0.0b3 development milestone.