Opentack nova – Host filters for Ceph and local ephemeral storage

OpenStack: use ephemeral and persistent root storage for different hypervisors Original article https://ceph.io/en/news/blog/2014/openstack-use-ephemeral-and-persistent-root-storage-for-different-hypervisors/ Computes with Ceph image backend and computes with local image backend. At some point, you might want to build hypervisor and use their local storage for virtual machine root disks. Using local storage will help you maximasing your IOs and will reduce […]

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Openstack Queens – Cinder: Deleting volumes using Mysql

Sometimes things get so broken you just have to hack stuff out of the database because the API’s are in a stuck state. Here is what I did to successfully remove the volume entries for some stuck volumes after a MySQL server crash. Note, You’ll also need to adjust the quotas table too to decrement […]

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Errors running Glance[Liberty] on Centos 7

When trying to install\run glance on Centos 7 I came across the following error ImportError: No module named oslo_policy This was resolved by installing the python oslo_policy module by running pip install oslo.policy You may or not need to install pip(Python’s equivalent to Yum almost?) yum install python-pip   Thats all wonderful but now i […]

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Cinder – Resize root volume

To resize the root volume of an instance can be tricky, this worked for me Note some commands, particularly “cinder reset-state” returned a HTTP 403, i had to run those as admin   [root@vm-os-ks01 ~]# source admin.rc [root@vm-os-ks01 ~]# cinder reset-state –state available b35e676a-7593-458d-b6f4-cc60e075cfd4 [root@vm-os-ks01 ~]# nova volume-list +————————————–+———–+————–+——+————-+————————————–+ | ID                                   | Status    | Display […]

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