Planet Ceph

Aggregated news from external sources

  • January 3, 2017
    Storage just in time

    Storage is one of the pillar of IT infrastructure which used to be dominated by big and costly storage appliances. As software defined storage becomes commonplace, we now have the opportunity to apply just-in-time principles to the storage world. This is what I will go through in this article. History Since the early 2000s big …Read more

  • January 2, 2017
    Ceph, the future of storage, incoming features blog series

    Happy New year! Bonne Année ! Best wishes to my readers :). C’est le turfu and Ceph is moving fast, really fast and you won’t believe how many awesome features are currently in the pipe. So to start the year off the wheels, I’m planning on publishing a set of articles to tease you a …Read more

  • December 26, 2016
    处理Ceph osd的journal的uuid问题

    一、前言之前有一篇文章介绍的是,在centos7的jewel下面如果自己做的分区如何处理自动挂载的问题,当时的环境对journal的地方采取的是文件的形式处理的,这样就没有了重启后journal的磁盘偏移的问题如果采用的是ceph自带的deploy去做分区的处理的时候,是调用的sgdisk去对磁盘做了一些处理的,然后deploy能够识别一些特殊的标记,然后去做了一些其他的工作,而自己分区的时候,是没有做这些标记的这样就可能会有其他的问题 我们看下如何在部署的时候就处理好journal的uuid的问题 二、实践 2.1 按常规流程部署OSD 准备测试的自分区磁盘 dd if=/dev/zero of=/dev/sde bs=4M count=100;dd if=/dev/zero of=/dev/sdf bs=4M count=100; parted /dev/sde mklabel gpt;parted /dev/sdf mklabel gpt;parted /dev/sde mkpart primary 1 100%;parted /dev/sdf mkpart primary 1 100% 使用的sde1作为数据盘,使用sdf1作为ssd的独立分区的journal磁盘 我们线按照常规的步骤去部署下 做osd的prepare操作 [root@lab8106 ceph]# ceph-deploy osd prepare lab8106:/dev/sde1:/dev/sdf1···[lab8106][WARNIN] adjust_symlink: Creating symlink /var/lib/ceph/tmp/mnt.7HuS8k/journal -> /dev/sdf1··· 做osd的activate操作 [root@lab8106 ceph]# ceph-deploy osd activate lab8106:/dev/sde1:/dev/sdf···[lab8106][WARNIN] ceph_disk.main.Error: …Read more

  • December 23, 2016
    Ceph Rados Gateway and NFS

    I guess you got lucky, or maybe I felt so bad not posting anything for more than a month but here it is the last blog post of the year :). With the latest release of Ceph, Jewel, a new Rados Gateway feature came out. This feature hasn’t really been advertised yet so I thought …Read more

  • December 19, 2016
    Busy busy days!

    Oh wait is it the end of the year already? Dear readers, no sebastien-han.fr is not dead (it actually got a bit more color since yesterday) and yes I know… I haven’t posted anything for more than a month I’ve been having a hard time keeping up with the pace I’ve committed too, sorry about …Read more

  • December 16, 2016
    Ceph RGW AWS4 presigned URLs working with the Minio Cloud client

    Some fellows are using the Minio Client (mc) as their primary client-side tool to work with S3 cloud storage and filesystems. As you may know, mc works with the AWS v4 signature API and it provides a modern alternative under the Apache 2.0 License to UNIX commands (ls, cat, cp, diff, etc). In the case …Read more

  • December 13, 2016
    Rapido: A Glorified Wrapper for Dracut and QEMU

    Introduction I’ve blogged a few of times about how Dracut and QEMU can be combined to greatly improve Linux kernel dev/test turnaround. My first post covered the basics of building the kernel, running dracut, and booting the resultant image with qemu-kvm. A later post took a closer look at network configuration, and focused on bridging …Read more

  • December 5, 2016
    Ceph ansible is building its community

    This blog just relays what the initial announcement of the ceph-ansible mailing list. Hello community! ceph-ansible has been growing quite decently for the last couple of year. I’m glad to see that we now have so many users and contributors. We are currently implementing a release process within ceph-ansible, where we will certify stable releases …Read more

  • November 27, 2016
    The Dos and Don'ts for Ceph for OpenStack

    Ceph and OpenStack are an extremely useful and highly popular combination. Still, new Ceph/OpenStack deployments frequently come with easily avoided shortcomings — we’ll help you fix them! Do use show_image_direct_url and the Glance v2 API With Ceph RBD (RADOS Block Device), you have the ability to create clones. You can think of clones as the …Read more

  • November 25, 2016
    How to increase debug levels and harvest a detailed OSD log

    Your OSD doesn’t start and you want to find out why. Here’s how to increase the debug levels and harvest a detailed OSD log: First, rotate the OSD log, or just do “cd /var/log/ceph ; mv ceph-osd.0.log ceph-osd.0.log-foo” Then, edit /etc/ceph/ceph.conf to add the following lines to the [osd] section: [osd] debug osd = 20 …Read more

  • November 25, 2016
    How to repair a leveldb database

    Repairing a corrupted leveldb database turns out to be simple, but there is no guarantee that the database state after repair will be the same as it was before the corruption occurred! First, install the leveldb Python module, e.g., using pip. Then, determine the directory path where your leveldb database is stored. For example, the …Read more

  • November 6, 2016
    Automatically deploying Ceph using Salt Open and DeepSea

    One key part of implementing Ceph management capabilities within openATTIC revolves around the possibilities to install, deploy and manage Ceph cluster nodes in an automatic fashion. This requires remote node management capabilities, that openATTIC currently does not provide out of the box. For “traditional” storage configurations, openATTIC needs to be installed on any storage node …Read more

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