Category Archives: openstack

Working on a patch series with gerrit

A small patch series (1, 2, 3) is worked on in the wip-key-inject-unless topic branch. When running git review –yes, each commit is dispatched to the review designated by the Change-Id: of the message.

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HOWTO migrate an AMI from Essex to a bootable volume on Havana

A snapshot of an Essex OpenStack instance contains an AMI ext3 file system. It is rsync’ed to a partitioned volume in the Havana cluster. After installing grub from chroot, a new instance can be booted from the volume.

Posted in Essex, Havana, openstack | 1 Comment

Celebrate Firefly and Icehouse

If you’re in Atlanta Sunday 11th, may 2014 evening, for the OpenStack summit or any other reason, join us to celebrate the OpenStack Icehouse release and the Ceph Firefly release. There will be both OpenStack and Ceph developers present and … Continue reading

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OpenStack Upstream Training in Atlanta

The OpenStack Foundation is delivering a training program to accelerate the speed at which new OpenStack developers are successful at integrating their own roadmap into that of the OpenStack project.  If you’re a new OpenStack contributor or plan on becoming … Continue reading

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Becoming a Core Contributor : the fast track

Anyone willing to become a better Free Software contributor is invited to attend the next session of Upstream University in advance of FOSDEM. The training starts January 30th, 2014 in the morning, at a walking distance from Grand Place in … Continue reading

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wget on an OpenStack instance hangs ? Try lowering the MTU

Why would OpenStack instances fail to wget a URL and work perfectly on others ? For instance: $ wget -O – ‘https://ceph.com/git/?p=ceph.git;a=blob_plain;f=keys/autobuild.asc’ Connecting to ceph.com (ceph.com)|208.113.241.137|:443… connected. HTTP request sent, awaiting response… 200 OK Length: unspecified [text/plain] Saving to: `STDOUT’ … Continue reading

Posted in Havana, openstack, tinc | 1 Comment

Mixing Ceph and LVM volumes in OpenStack

Ceph pools are defined to collocate volumes and instances in OpenStack Havana. For volumes that do not need the resilience provided by Ceph, a LVM cinder backend is defined in /etc/cinder/cinder.conf: [lvm] volume_group=cinder-volumes volume_driver=cinder.volume.drivers.lvm.LVMISCSIDriver volume_backend_name=LVM and appended to the list … Continue reading

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Migrating from ganeti to OpenStack via Ceph

On ganeti, shutdown the instance and activate its disks: z2-8:~# gnt-instance shutdown nerrant Waiting for job 1089813 for nerrant… z2-8:~# gnt-instance activate-disks nerrant z2-8.host.gnt:disk/0:/dev/drbd10 On an OpenStack Havana installation using a Ceph cinder backend, create a volume with the same … Continue reading

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Collocating Ceph volumes and instances in a multi-datacenter setup

OpenStack Havana is installed on machines rented from OVH and Hetzner. An aggregate is created for machines hosted at OVH and another for machines hosted at Hetzner. A Ceph cluster is created with a pool using disks from OVH and … Continue reading

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Fragmented floating IP pools and multiple AS hack

When an OpenStack Havana cluster is deployed on hardware rented from OVH and Hetzner, IPv4 are rented by the month and are either isolated ( just one IP, not a proper subnet ) or made of a collection of disjoint … Continue reading

Posted in Havana, openstack | 4 Comments