Planet Ceph

Aggregated news from external sources

  • July 30, 2013
    Using Ceph-deploy

    Install the ceph cluster

    On each node :

    create a user “ceph” and configure sudo for nopassword :

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    $ useradd -d /home/ceph -m ceph
    $ passwd ceph
    $ echo “ceph ALL = (root) NOPASSWD:ALL” | sudo tee /etc/sudoers.d/ceph
    $ chmod 0440 /e…

  • July 26, 2013
    Ceph: update Cephx Keys

    It’s not really clear from the command line

    Generate a dummy key for the exercise

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    $ ceph auth get-or-create client.dummy mon 'allow r' osd 'allow rwx pool=dummy'

    [client.dummy]
    key = AQAPiu1RCMb4CxAAmP7rrufwZP…

  • July 11, 2013
    Inktank Presenting on Ceph at FinTech Demo Day!

    It’s been quite a year for Inktank and the Ceph community. We are super excited to announce another major milestone for Inktank – our participation in the third annual FinTech Innovation Lab in New York City. The goal of the Lab – established in 2010 by Accenture and the Partnership Fund for New York City […]

  • June 23, 2013
    What I think about CephFS in OpenStack

    I recently had some really interesting questions that led to some nice discussions.
    Since I received the same question twice, I thought it might be good to share the matter with the community.

    The question was pretty simple and obvioulsy the context…

  • June 11, 2013
    Ceph RBD Online Resize

    Extend rbd drive with libvirt and XFS

    First, resize the device on the physical host.

    Get the current size :

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    $ qemu-img info -f rbd "rbd:rbd/myrbd"

    Be careful, you must specify a bigger size, shrink a volume is destructive for the FS.

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    $ qemu-img resize -f rbd "rbd:rbd/myrbd" 600G

    List device define for myVM :

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    $ virsh domblklist myVM

    Resize libvirt blockdevice :

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    $ virsh blockresize --domain myVM --path vdb --size 600G
    $ rbd info rbd/myrb

    Extend xfs on guest :

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    $ xfs_growfs /mnt/rbd/myrbd

    Extend rbd with kernel module

    You need at least kernel 3.10 on ceph client to support resizing.
    For previous version look at http://dachary.org/?p=2179

    Get current size :

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    $ rbd info rbd/myrbd

    Just do :

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    $ rbd resize rbd/myrbd --size 600000
    $ xfs_growfs /mnt/rbd/myrbd

    Also, since cuttlefish you can’t shrink a bloc device without specify additional option (–allow-shrink)

  • June 3, 2013
    Ceph integration in OpenStack: Grizzly update and roadmap for Havana

    What a perfect picture, a Cephalopod smoking a cigar! Updates!
    The OpenStack developer summit was great and obviously one of the most exciting session was the one about the Ceph integration with OpenStack.
    I had the great pleasure to attend this sess…

  • May 16, 2013
    ViPR: A software-defined storage mullet?

    Almost every few weeks, new storage products are announced by competitors and I generally avoid commenting on them. But EMC’s ViPR announcement contains attempts to perform both marketing and technical sleight of hand around software-defined storage that potentially do much to slow down the inevitable change that is coming to the storage market. While EMC […]

  • May 13, 2013
    Deploy a Ceph MDS server

    How-to quickly deploy a MDS server.

    Assuming that /var/lib/ceph/mds/mds is the mds data point.

    Edit ceph.conf and add a MDS section like so:

    [mds]
    mds data = /var/lib/ceph/mds/mds.$id
    keyring = /var/lib/ceph/mds/mds.$id/mds.$id.keyring

    [md…

  • May 11, 2013
    What a Year 1!

    Back in January I posted about how Inktank’s momentum was accelerating. Well, to say this trend is continuing would be a gross understatement. The Inktank team continues to execute at a blinding pace and the world keeps on noticing. For example: •    The Community and Marketing (we are hiring) teams killed it at the OpenStack Summit. There […]

  • May 7, 2013
    Use existing RBD images and put it into Glance

    The title of the article is not that explicit, actually I had trouble to find a proper one. Thus let me clarify a bit. Here is the context I was wondering if Glance was capable of converting images within its store. The quick answer is no, but I thin…

  • May 7, 2013
    Ceph Cuttlefish Release has Arrived!

    ­­Today marks another milestone for Ceph with the release of Cuttlefish (v0.61), the third stable release of Ceph. Inktank’s development efforts for the Cuttlefish release have been focused around Red Hat support and making it easier to install and configure Ceph while improving the operational ease of integrating with 3rd party tools, such as provisioning […]

  • April 25, 2013
    Ceph Community Expands “Geek on Duty”

    Last month Inktank launched a community help program that we called “Office Hours” in an attempt to provide specific hours where an engineer would be available to answer questions from the community. These efforts have done a lot for both the ability to answer questions, as well as the ability for our engineers to focus […]

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