openATTIC 3.5.0 has been released
We are happy to announce version 3.5.0 of openATTIC. With this release we continued integrating Ceph Luminous features. One of those features is the possibility to edit Ceph pools – the size of PGs...
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Meet the openATTIC team at SUSECON 2017 in Prague (CZ)
Conference season is heating up again – next week Kai Wagner (co-founder of the openATTIC project) and myself will be at SUSECON in Prague, to talk about how to manage a Ceph cluster with SUSE’s...
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掉电后osdmap丢失无法启动osd的解决方案
前言 本篇讲述的是一个比较极端的故障的恢复场景，在整个集群全部服务器突然掉电的时候，osd里面的osdmap可能会出现没刷到磁盘上的情况，这个时候osdmap的最新版本为空或者为没有这个文件 还有一种情况就是机器宕机了，没有马上处理，等了一段时间以后，服务器机器启动了起来，而这个时候osdmap已经更新了，全局找不到需要的旧版本的osdmap和incmap，osd无法启动...
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推荐一本书《Ceph设计原理与实现》
前言 本篇不是一篇技术文，而是推荐的一本书，对于写书来说，在多年以前觉得是一件可望而不可及的事情，而看到几本经典书籍的作者在讲述自己写书的过程的时候，都是自己注入了大量的精力的，所以我自己目前也只能是一个个知识点的以博客的方式进行记录...
View ArticleopenATTIC 3.5.1 has been released
We are happy to announce Version 3.5.1 of openATTIC. As you can see from the length of the fixed bug section in the changelog, we’ve been focused on refining existing functionality and features. More...
View ArticleopenATTIC 3.5.2 has been released
We are proud to announce Version 3.5.2 of openATTIC. Today, we broke our regular release cycle, with a good reason. After we published version 3.5.1, we found a hand full of bugs that, from our point...
View ArticleMaking RBD images persistent
Making RBD images persistent Here’s a quick tutorial on how to make RBD’s, disable their features, and make them persistent at startup. Creating the RBD image Note – You really should go into your...
View ArticleUsing Erasure Coding with RadosGW
This is going to be a quick write up of Erasure Coding and how to use it with our RadosGW. First lets look at our default profile for erasure coding on Ceph, understand it, and go and create our own....
View ArticleopenATTIC 3.5.3 has been released
We are happy to announce version 3.5.3 of openATTIC. 3.5.3 is a small bugfix release mainly containing fixes for upgrade bugs from openATTIC 2.0. This release also features fixes regarding deletion of...
View ArticleopenATTIC 3.6.0 has been released
We’re happy to announce version 3.6.0 of openATTIC. Given the fact that openATTIC 3.5.3 was only a bug fix release this 3.6.0 release includes all the improvements and changes since 3.5.2. We cleaned...
View ArticleOpenStack Summit Syndey: Delivering OpenStack and Ceph in containers
DELIVERING OPENSTACK AND CEPH IN CONTAINERS Date: 07/11/17 Video: Source: Sebastian Han (OpenStack Summit Syndey: Delivering OpenStack and Ceph in containers) The post OpenStack Summit Syndey:...
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Introducing Ceph Ansible profile library
A couple of releases ago, in order to minimize changes within the ceph.conf.j2 Jinja template, we introduced a new module that we took from the OpenStack Ansible guy. This module is called...
View ArticleQuick overview of Ceph version running on OSDs
When checking a Ceph cluster it’s useful to know which versions you OSDs in the cluster are running. There is a very simple on-line command to do this: ceph osd metadata|jq ‘.[].ceph_version’|sort|uniq...
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Introducing ceph-nano
I’ve recently started a small project that aims to help developers working with the S3 API. The program is called cn for Ceph Nano, is available on github let me give you a tour of what it does. I...
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CentOS GRUB损坏修复方法
前言 博客很久没有更新了，一个原因就是原来存放部署博客的环境坏了，硬盘使用的是SSD，只要读取到某个文件，整个磁盘就直接识别不到了，还好博客环境之前有做备份，最近一直没有把部署环境做下恢复，今天抽空把环境做下恢复并且记录一篇基础的GRUB的处理文档 这两天正好碰到GRUB损坏的事，很久前处理过，但是没留下文档，正好现在把流程梳理一下，来解决grub.cfg损坏的情况,或者无法启动的情况 实践步骤...
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mds的cpu占用问题分析以及解决办法
前言 mds是ceph里面处理文件接口的组件，一旦使用文件系统，不可避免的会出现一种场景就是目录很多，目录里面的文件很多，而mds是一个单进程的组件，现在虽然有了muti mds，但稳定的使用的大部分场景还是单acitve mds的...
View ArticleopenATTIC 3.6.1 has been released
It is our great pleasure to announce Version 3.6.1 of openATTIC. 3.6.1 is a bugfix release for the 3.6 stable branch, containing fixes for multiple issues that were reported by users. In addition to...
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Learning Ceph – Second Edition
Learning Ceph – Second Edition was published in October 2017. This is special post to highlight a new book I’ve been helping with. Good colleagues of mine wrote that book and I encourage anyone...
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A Luminous Release
The third one is a charm. RHCS 3 is our annual major release of Red Hat Ceph Storage and it brings great new features to customers in the areas of containers, usability and raw technology horsepower....
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Ceph对象主本损坏的修复方法
前言 问题的触发是在进行一个目录的查询的时候，osd就会挂掉，开始以为是osd操作超时了，后来发现每次访问这个对象都有问题 log [WRN] ： slow request 60.793196 seconds old, received at osd_op(mds.0.188:728345234100006c6ddc.00000000 [o map-get-header...
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