Centos 7 rhel 7 supports failover cluster using the pacemaker. A pair of centos nfs servers can be a great way to build an inexpensive, reliable, redundant fileserver. Mar 17, 2014 read this is a stepbystep guide on how to configure drbd on ubuntu server 12. Building activeactive redhat 6 cluster with gfs2 over drbd.
Install and configure drbd on centos, rhel drbd distributed replicated block device is a linuxbased free open source software component drbd facilitates the replacement of shared storage systems by networked mirroring. Gfs2 differs from distributed file systems such as afs, coda, intermezzo, or glusterfs because gfs2 allows all nodes to have direct concurrent access to the. Just to clarify, this article is for gfs2, it does not use drbd. In this guidance, i am build 2 system for online failover. In the previous post, we have explained about the drbd distributed replicated block device to understand what is drbd distributed replicated block device, how the drbd works, drbd operations, drbd replications modes, drbd architecture and drbd. Clustering with pacemaker, drbd and gfs2 on baremetal servers. Oh, remember to update your centos before proceeding to do all of the above. This guide is intended to serve users of the distributed replicated block device version 9 drbd9 as a definitive reference guide and handbook. The highlevel administration tool of the drbdutils program suite. In computing, the global file system 2 or gfs2 is a shared disk file system for linux.
Make sure gfs2 filesystem is mounted on an active node and also make sure gfs2 mounts will move to another node if current active node will be down. Cluster from scratch drbd, gfs2 and apache on fedora 12 vi. Download drbd packages for alpine, centos, fedora, opensuse. This post explains how to integrate drbd in a cluster with corosync and pacemaker. Create a 3 node drbd 9 cluster using drbd manage in centos 7.
Install and configure drbd on centos, rhel the linuxpcfix. Rhel7 configuring gfs2 on pacemakercorosync cluster. Clusters from scratch pacemaker 1 clusterlabs home. Although a gfs2 file system can be implemented in a standalone system or as part of a cluster configuration, for the red hat enterprise linux 6 release red hat does not support the use of gfs2 as a singlenode file system. In this tutorial, let us see how to install and configure drbd on centos 6. This is done by mirroring a whole block device via an assigned network. It is being made available to the drbd community by linbit, the projects sponsor company, free of charge and in the hope that it will be useful. Rush job, never done clustered file systems before, vlan didnt support multicast. Red hat enterprise linux cluster, high availability, and gfs. Stretch activeactive nfs cluster with drbd and gfs2. Drbd presents a layer on top of a normal block device and is responsible for keeping it synchronized over multiple nodes. So does redhat support drbd for simiple file system replication.
By joining our community you will have the ability to post topics, receive our newsletter, use the advanced search, subscribe to threads and access many other special features. Gfs2 shareddisk cluster filesystem over a pacemaker 2 nodes cluster using drbd ramangupta16 gfs2 drbd cluster. The proposed solution will include drbd for emulating a shared disk and gfs2 as a clustered file system. Drbd refers to block devices designed as a building block to form high availability ha clusters distributed replicated block device this is done by mirroring a whole block device via an assigned network. Linux driver for the distributed replicated block device. So i have been trying to get my head around drbd for creating a networked ha pair of file servers. It is however evident that the drdb resource isnt running, therefore you may want to redo the configuration and check for any drbdrelated errors. How to integrate drbd with pacemaker clusters on linux, configure drbd with pacemaker, drbd pacemaker cluster on linux, drbd pacemaker, drbd pacemaker corosync. Building activeactive redhat 6 cluster with gfs2 over drbd prepare nodes. This allows clients to know about the presence or disappearance. In this blog we show how to create a 3 node drbd 9 cluster using drbd manage. I trying to configure 2 node nfs cluster on redhat, but gfs2 is unusable very very slow for me after all tunings of cman startup etc.
Read this is a stepbystep guide on how to configure drbd on ubuntu server 12. Setting up an o2cb cluster with dual primary drbd and ocfs2 on oracle linux 7. Clusters from scratch apache, drbd and gfs2 creating activepassive and activeactive clusters on fedora 12. Install rh6 with minimal configuration on two vms look into howto align vmware linux vmdk files. Drbd distributed replicated block device is a linuxbased free open source software component drbd facilitates the replacement of shared storage systems by networked mirroring. Detailed instructions for installing fedora are available at installguidef11. By the way, drbd km package is built with the current version of kernel, so if you will update kernel in the future, then you need to rebuild drbd again with the version of kernel. Linux driver for the distributed replicated block device opensuse leap 15. If using activeactive you need a filesystem that supports locking like gfs or similar. Distributed replicated block device is actually a network based raid 1.
Detailed instructions for installing fedora are available at. How to configure online failoverfailback on centos 6. Jun 22, 2007 yum install drbd kmod drbd heartbeat this is the basic you need for 2 server failover. Use drbd in a cluster with corosync and pacemaker on centos 7. Gfs2 as the cluster filesystem in activeactive mode. For a filesystem, we would be using a shared storage from iscsi. Corosync to provide messaging and membership services, 3. As a note, currently red hat does not support gfs with drbd, but this. There is some information on the net, like configure drbd centos 6 5, which i assume will work on centos 6.
But yum search drbd returns me only a package i dont need. Mar 22, 2015 drbd refers to block devices designed as a building block to form high availability ha clusters. Sep 04, 2014 distributed replicated block device is actually a network based raid 1. How to install and configure drbd cluster on rhel7 centos7. My problem is, when i want load my drbd module, my centos could not find it. In computing, the global file system 2 or gfs2 is a shared disk file system for linux computer clusters. The third node in the third location will be used as a quorum node, and disconnected node should do suicide by itself. Custom resource agents that are not shipped with red hat enterprise linux.
However, drbd counts for one great package, and there doesnt seem to be an official centos way to get it after googling a lot. It is a building block for setting up high availability ha clusters. In order to install drbd, you will need to enable the elrepo repository on both nodes, because this software package is not distributed through the standard centos and red hat enterprise linux repositories. Gfs2 as the cluster filesystem in activeactive mode given the graphical nature of the install process, a number of screenshots are included. Drbd stands for distributed replicated block device and the name already explains what it is. Ive even managed to get the primaryprimary working and write to either disk and see the changes immediately on the other server. Configure gfs2 filesystem in rhelcentosoel 7 with pacemaker. Usage of drbd please see article does rhel6 support drbd. This guide will walk you through installing drbd with the gfs2 clustered filesystem. It is being made available to the drbd community by linbit, the projects sponsor company, free of charge and in the hope that it will be.
This article explains you the step by step procedure of how to install and configure drbd on rhel7 centos7. Drbd download for linux apk, rpm download drbd linux packages for alpine, centos, fedora, opensuse. Drbd mirrors a block device over the network to another machine. Redundant nfs storage on centos 6 by justin silver published february 16, 2014 updated august 24, 2014 a pair of centos nfs servers can be a great way to build an inexpensive, reliable, redundant fileserver. But test sounds not stable for me and we switched to centos for stability. There is some information on the net, like configuredrbdcentos65, which i assume will work on centos 6. Integrate drbd with pacemaker clusters on rhel7 centos7. The services are running on two 2u supermicro 2 x hexa core 6 cores. Here we are going to use drbd to replicate the data between nfs nodes and heartbeat to provide high availability to the cluster. How to configure highavailability cluster on centos 7. How to setup gfs2 or gfs in linux centos hungred dot com. Heartbeat is a daemon that provides cluster infrastructure communication and membership services to its clients. How to configure gfs2 file system in redhat linux 7 centosoel 7 with pacemakercorosync step by steps all comands now we.
Drbd distributed replicated block device is a linuxbased software component to mirror or replicate individual storage devices such as hard disks or partitions from one node to the others over a network connection. By the way, drbdkm package is built with the current version of kernel, so if you will update kernel in the future, then you need to rebuild drbd again with the version of kernel. Once this rpm has been installed you can use yum to install both the drbd driver. How to configure data replicationsynchronize on centos 6. If you want to use the drbd feature of allowtwoprimaries, then you also need the cman cluster management with gfs2 filesystems i have built 2 server virtualisation with fail over using this just this week and works fine. The drbd users guide please read this first this guide is intended to serve users of the distributed replicated block device drbd as a definitive reference guide and handbook. Gfs2 shareddisk cluster filesystem over a pacemaker 2 nodes cluster using drbd ramangupta16gfs2drbdcluster.
Many things can go wrong while configuring clustering, therefore its hard to tell what was the exact problem in your case. How to install and configure drbd cluster on rhel7. As i said, failover is a series of operations, so we would need to configure filesystem and networks as a resource. Activeactive high availability pacemaker cluster with gfs2.
Oct 24, 2016 how to configure gfs2 file system in redhat linux 7 centosoel 7 with pacemakercorosync step by steps all comands now we config. Its necessary that the server youd like to install drbd on has a free blockdevice. But this kernel and distro does not support drbd i think. If you need to secure data on certain disk and are therefore mirroring your data to another disk via network, you have to configure drbd on your system.
Rhel7 configuring gfs2 on pacemakercorosync cluster configuring nfs ha using redhat cluster pacemaker on rhel 7 this article will briefly explains about configuring the gfs2 filesystem between two cluster nodes. Drbd makes it possible to maintain consistency of data among multiple systems in a network. Activeactive high availability pacemaker cluster with gfs2 and iscsi shared storage on centos 7. This tutorial is compatible with any version of centos redhatoracle linux 6. Db distributed replicated block device drbd gfs2 global file system ha heartbeat high availability mariadb. Thus i ended up with drbd working ok between the two servers but cman gfs2 not working, resulting in what was meant to be a drbd primaryprimary cluster being a primarysecondary cluster until the vlan could be fixed with gfs only mounted on the one server. I got it working that also looks inzo the epel repositorie.
Now, the only thing missing for you is to download our gfs2 on a dualprimary drbd techguide and get to work. For configure drbd, we should have at least 2 machines and have 2 harddrive on each machines. Drbd as a costeffective alternative to shared storage, 5. There are many new features that you can make use of when building high availability clusters with drbd 9 and drbd manage is one of the great new tools that you can use. Obtains all drbd configuration parameters from the configuration file etcnf and acts as a frontend for drbdsetup and drbdmeta. Here we will use a rackspace cloud server with attached cloud block storage. Here, we will be looking at configuring the apache web server as a highly available application. Install gfs2utils, lvm2cluster, dlm on all your cluster nodes if not already installed. Setup minimal centos 5 be sure that both nodes can resolve correctly names either through dns or etchosts yum update as usual. Step involved to install and configure drbd on rhel7 centos7 1. We are going to setup a cluster of pacemaker, drbd and gfs2 on couple of. How to set up gfs2 with clustering on linux rhel centos 7.
1042 455 332 177 1389 1197 1510 261 927 1299 1490 273 857 469 599 35 1492 991 42 1065 1160 1425 456 1016 182 1202 317 448 612 1286 1537 128 128 1439 294 950 326 1184 970 1404 959 981 750 322