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How to handle large omap objects

How to handle large omap objects 1506 1001 Wout van Heeswijk

Every once in a while a customer will ask me what to do with these messages: health: HEALTH_WARN1 large omap objects First lets see what this means: Ceph services are…

Creating a Management Routing Instance (VRF) on Juniper QFX5100

Creating a Management Routing Instance (VRF) on Juniper QFX5100 1414 1001 Wido den Hollander

For a Ceph cluster I have two Juniper QFX5100 switches running as a Virtual Chassis. This Virtual Chassis is currently only performing L2 forwarding, but I want to move this…

Setting noout flag per Ceph OSD

Setting noout flag per Ceph OSD 1630 1001 Wido den Hollander

Prior to Ceph Luminous you could only set the noout flag cluster-wide which means that none of your OSDs will be marked as out. On large(r) cluster this isn’t always…

Comparing two Ceph CRUSH maps

Comparing two Ceph CRUSH maps 1500 1000 Wido den Hollander

Sometimes you want to test if changes you are about to make to a CRUSH map will cause data to move or not. In this case I wanted to change…

HAProxy in front of Ceph Manager dashboard

HAProxy in front of Ceph Manager dashboard 1500 1000 Wido den Hollander

The Ceph Mgr dashboard plugin allows for an easy dashboard which can show you how your Ceph cluster is performing. In certain situations you can’t contact the Mgr daemons directly…

Safely backing up your Ceph monitors 1562 1001 Wido den Hollander

Safely backing up your Ceph monitors

So you might wonder: Why do I need to make a backup of my Ceph monitors? I have multiple monitors.…

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Changing the region of a RGW bucket 1500 1000 Wido den Hollander

Changing the region of a RGW bucket

As of Ceph version 0.67 (Dumpling) the Ceph Object Gateway aka RADOS Gateway supports regions. This allows you to create…

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A quick note on running CloudStack with RBD on Ubuntu 12.04 1510 1000 Wido den Hollander

A quick note on running CloudStack with RBD on Ubuntu 12.04

When you want to use Ceph as Primary Storage in Apache CloudStack you need a recent version of libvirt with…

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Redundant Ceph monitors with Round Robin DNS 1500 1001 Wido den Hollander

Redundant Ceph monitors with Round Robin DNS

One of the unique features of Ceph is that it can be build without any Single Point of Failure. No…

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Enhanced RBD support for CloudStack 4.2 1500 1000 Wido den Hollander

Enhanced RBD support for CloudStack 4.2

About 1 hour ago the new storage subsystem got merged into the master branch of CloudStack. That is wonderful news…

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Ceph distributed storage with CloudStack 1618 1001 Wido den Hollander

Ceph distributed storage with CloudStack

As we are nearing the CloudStack 4.0 release I figured it was time I’d write something about the Ceph integration…

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