Provide a clustered version of the tdb database with automatic rebuildrecovery of the databases upon node failures. Ctdb cluster configuration ctdb configuration directory. This procedure does not verify that your application is highly available because you have not yet installed your data service. Basically, an ha cluster with samba faces the same challenges that all other services on a server need to take on. Ceph and openldap configuration can be found in the linked articles, here we will focus mainly on ctdb and samba. Note that this is a samba style configuration file, so it has a very different syntax to previous ctdb configuration. Welcome to the ctdb web pages ctdb is a cluster implementation of the tdb database used by samba and other projects to store temporary data.
They may be stored somewhere else, such as usrlocaletcctdb, depending on. However, all useful configurations are extensions of a default configuration, so it is important to test this first. The selinux package is primarily allowing ctdb, samba, and ctdb to access their config files on the fuse file system. Clustered trivial data base, because this is how this abbreviation develops, ensures the consistency of. Ctdb is a cluster implementation of the tdb database used by samba. The mandatory fields that must be configured for ctdb operation are as follows. The ctdb configuration file is located at etcsysconfig ctdb.
Ctdb can be used to cluster services other than samba and nfs. When the ctdb daemon starts up, it will start in recovery mode. And after some more testing, i realized that ctdb changed significantly between samba 4. Glusterfs is used to replicate data between multiple servers. Ctdb will manage and startstoprestart the required tgtd, so the operating system should be configured so these are not startedstopped automatically.
So now it is possible to setup a high availability file server environment. Setting up an activeactive samba ctdb cluster using gfs. Everything is running fine as far as the cluster failover, etc. Ctdb configuration red hat enterprise linux 6 red hat. The default location of this file is etc ctdb ctdb.
Prepared by rafael marangoni, from brlink servidor linux team. In a ctdb cluster environment where ctdb manages samba. See the recovery lock section in ctdb 7 for more details. Configure gluster ctdb and samba on a fedora system jmontleongluster ctdbsambaansiblerole. Ctdb red hat enterprise linux 6 red hat customer portal. This is the release version of ctdb, a clustered implementation of tdb database used by samba and other projects to store temporary data. Install the necessary software with the command sudo aptget install y samba samba. The original samba software and related utilities were created by andrew tridgell.
The nodes of the cluster are set up such that the samba configuration files are located on the cluster shared storage i. Configuration options are grouped into several sections below. Sambaxp 2018, slide 4 red hat gluster storage rhgs red hat gluster storage provides an open, software defined storage solution across physical, virtual, and cloud resources. This section describes the steps to set up zfs, glusterfs, ctdb, the sambagluster vfs plugin, and nfs ganesha for sharing glusterfs volumes. Ctdb splitbrain resolution configuration steps for demo setup. Ctdb is a cluster implementation of the tdb database used by samba and other projects to store temporary data.
Five tools for configuring samba by jack wallen in five apps, in software on may 16, 2012, 5. Together with glusterfs you can build an activeactivecluster with automatic failover and load balancing. Ctdb is originally developed specifically as cluster enhancement software and contains high availability, load balancing features which makes file services like samba, nfs and ftp clusterable. Since 1992, samba has provided secure, stable and fast file and print services for all clients using the smbcifs protocol, such as all versions of dos and windows, os2, linux and many others.
How to configure samba server and transfer files between. When it completes addresses will be reconfigured and reassigned across the cluster as necessary. If an application is already using tdb for temporary data it is very easy to convert that application to be cluster aware and use ctdb instead. These services are not as well tested as the core samba and nfs services. If you have a working set of samba and ctdb packages, then the process of migrating a previous install. Starting ctdb and samba services red hat enterprise.
Connections are made to iana assigned tcp port 4379 on each node. This file contains configuration that affects the operation of ctdb. Ctdb comes with event scripts for handling some of these services. Most documentation about how to install and configure ctdb is available in the ctdb wiki. Ctdb uses private ip addresses to communicate between nodes. First we need to check ad server has to be reachable. Apt simplifies the process of managing software on unixlike computer systems by automating the retrieval, configuration and installation of software packages, either from precompiled files or by compiling source code. This section will walk you through the setup and configuration of samba ctdb clustered trivial data base to provide highly available file storage. Ctdb provides clustered features on top of this clustered file system. Although not recommended, it is possible to configure a different port to be used for ctdb traffic. Secure file server based on samba, ctdb, cephfs and openldap. With samba and ctdb we can achieve this goal of distributing the shared file system using cifs protocol.
Feel free to ask questions on mailing lists andor provide patches. How to verify the installation and configuration of samba. See the ctdb1listvars, setvar and getvar commands for more details. Activeactive samba ha gfs2,luci,drbd and ctdb luvunix. This is similar to how a wan accelerator works but with the difference that while a wanaccelerator often acts as a proxy or a mitm, in the ctdb remote cluster node configuration the samba instance at the remote site is the genuine server, not a proxy and not a mitm, and thus provides 100% correct cifs semantics to clients. It includes configuration of a wsdiscovery daemon so that newer windows clients can find your samba server as well.
To use ctdb, a clustered file system must be available and shared on all nodes in the cluster. This will work, but offers no failover capabilities. They may be stored somewhere else, such as usrlocaletc ctdb, depending on how ctdb was installed. The implementation requires an external storage so we will use nfs in our examples. We use two nodes, both are active nodes, and the requests are loadbalanced. The following proceure assumes two servers hosting glusterfs volumes at ip addresses 10. However, the samba cluster servers are supposed to be member servers, connecting to an existing pdc which is using ldap as the password backend. From there it will additionally install gluster, ctdb, and samba, configure the disk partitions if necessary, lvm, gluster, ctdb, samba, and wsdd. Ctdb configuration red hat enterprise linux 6 red hat customer portal. Note that this is a sambastyle configuration file, so it has a very different syntax to previous ctdb configuration files. In this mode all clients connect to one specific node which will then multiplexloadbalance the clients evenly onto the other nodes in the cluster. The recovery lock, configured via the recovery lock option in the cluster section, provides important splitbrain prevention and is usually configured to point to a lock file in the cluster filesystem. Ctdb provides highly available cifs samba functionality. This command shows which nodes in the cluster are currently active in the lvs configuration.
File transfer between linux and windows can be done using samba which is an opensource software suite that provides seamless file and print services to smbcifs clients, allowing interoperability between unixlinux based system and windowsbased system. It is included as a package in virtually all linux distros, however it is usually outdated and lacking in. Depending on how ctdb was installed, a template configuration file may be installed. Sambaxp is the yearly samba team meeting and its ecosystem of developers, users and vendors all around the globe since 2002. I want to host a clustered samba file share on top of ceph with ctdb. Samba is free software licensed under the gnu general public license, the samba project is a member of the software freedom conservancy. Dec 05, 2011 ctdb is originally developed specifically as cluster enhancement software and contains high availability, load balancing features which makes file services like samba, nfs and ftp clusterable. This tutorial will walk through the setup and configuration of glusterfs and ctdb to provide highly available file storage via cifs. This resource agent manages ctdb, allowing one to use clustered samba in a linuxhapacemaker cluster those familiar with ctdb will be aware that it can handle node failover, and includes event scripts for managing services other than samba e. File server high availability guide inuvika documentation. In this tutorial i have shared one more step to integrate the active directory and ctdb samba share.
This is a distributionspecific service configuration file such as etcsysconfigctdb red hat or etcdefaultctdb debian and is a shell script see sh1. We can do that via ctdb and some cluster files system. This software is freely distributable under the gnu public license, a copy of which you should have received with this software in a file called copying. Starting ctdb and samba services red hat enterprise linux 6.
This file contains ctdb configuration options that affect the operation of ctdb daemons and commandline tools. This file is a shell script see sh1 but is usually limited to simple variable assignments and shellstyle comments. Note that currently kernel share modes have to be disabled in a share running with the cephfs vfs module for file serving to work properly. Samba is a great piece of software that provides microsoft compatible active directory and filesharing. This year the event is not possible to be held in the usual goettingen venue due to travel restrictions for many people caused by covid19. What is missing from your config is a common netbios name setting. These databases are always wiped when ctdbsamba starts and when a node is rebooted. While red hats software does have options for setting up samba shares, they say its not supported and that clients should instead connect directly to a node instead of setting up a clustered resource for it.
In this article, we dont cover how to configure samba. When this process starts, the recovery master will first freeze all databases to prevent applications such as samba from accessing the databases and it will also mark the recovery mode as recovery. This should be possible with the following in etcsysconfigctdb. This document explains how to setup clustered samba server using glusterfs and ctdb with the following software components. Red hat gluster storage provides an open, software defined storage solution across physical, virtual, and cloud resources. Ctdb samba failover not highly available server fault. There are changes that you have a high samba share load and you need to have 2 or more samba server to serve the same group of users. The red hat customer portal delivers the knowledge, expertise, and guidance available through your red hat subscription. This article explains how to set up an activeactive samba ctdb cluster, using gfs and drbd. Then needs to be edit the samba configuration file to access the samba share to authenticate over ad. However, for the most basic configuration, the configuration file should be empty or have all lines commented out.
Samba is now developed by the samba team as an open source project similar to the way the linux kernel is. Ctdb is managing samba, using a floating ip between the two hosts. Lvs is the mode where the entire ctdb samba cluster uses a single ip address for the entire cluster. If youre not running ctdb under pacemaker, then you probably want ctdb to manage the samba resource start and stop smbd, the same goes for winbind. How to set up quick and easy file sharing with samba. Unlimited fileserver with samba ctdb and cephfs slac 2019 robert sander concept multiple samba gateways in front of ceph cluster. May 16, 2012 five tools for configuring samba by jack wallen in five apps, in software on may 16, 2012, 5. Using sles 11 sp3 wha extensions i have setup a samba 3 cluster running on sles11sp3 with 2 nodes. Perform this procedure on one node or zone of the cluster only. If pnnlist is provided then status is given for the indicated nodes. How to configure a clustered samba share using ctdb in red. Clustering at the software level only checks one box on the list. Ctdbs behaviour can be configured by setting runtime tunable variables. Open source application, open source, community, open source developers, open source software, open ssh, operating system, operating.
Ctdb is a clustered database component in clustered samba that provides a highavailability loadsharing cifs server cluster. Want to know which application is best for the job. With your config each node will pick its host nam as netbios name, and the joins you did, actually joined different machines. This command reloads the public addresses configuration file on the specified nodes. Even the most attractive samba cluster will be no help if you ignore fundamental rules of high availability ha. A common invocation in scripts is ctdb nodestatus all to check whether all nodes in a cluster are healthy.
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