[ English | русский | Deutsch | Indonesia | English (United Kingdom) ]

Shutting down the Block Storage host

If a LVM backed Block Storage host needs to be shut down:

  1. Disable the cinder-volume service:

    # cinder service-list --host CINDER SERVICE NAME INCLUDING @BACKEND
# cinder service-disable CINDER SERVICE NAME INCLUDING @BACKEND \
cinder-volume --reason 'RAM maintenance'

  2. List all instances with Block Storage volumes attached:

    # mariadb cinder -BNe 'select instance_uuid from volumes where deleted=0 '\
'and host like "%<cinder host>%"' | tee /home/user/running_instances

  3. Shut down the instances:

    # cat /home/user/running_instances | xargs -n1 nova stop

  4. Verify the instances are shutdown:

    # cat /home/user/running_instances | xargs -n1 nova show | fgrep vm_state

  5. Shut down the Block Storage host:

    # shutdown -h now

  6. Replace the failed hardware and validate the new hardware is functioning.

  7. Enable the cinder-volume service:

    # cinder service-enable CINDER SERVICE NAME INCLUDING @BACKEND cinder-volume

  8. Verify the services on the host are reconnected to the environment:

    # cinder service-list --host CINDER SERVICE NAME INCLUDING @BACKEND

  9. Start your instances and confirm all of the instances are started:

    # cat /home/user/running_instances | xargs -n1 nova start
# cat /home/user/running_instances | xargs -n1 nova show | fgrep vm_state