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Debian Administration :: Heartbeat2 Xen cluster with drbd8 and ... http://www.debian-administration.org/articles/578/print 1 sur 10 29/01/08 22:02 Jun 03, 2013 · Building a ZFS Storage Appliance (part 1) Introduction The company I worked for has this "cloud computing" thing (i.e. selling virtualized computing resources) and it's all based around running traditional hypervisors (VMware at the moment). No stonith devices and stonith-enabled is not false ... the resources would be either a physical hardware unit such as disk drives or logical units like IP address ... Here at Anchor we’ve developed High-Availability (HA) systems for our customers to ensure they remain online in the event of catastrophic hardware failure. Most of our HA systems involve the use of DRBD, the Distributed Replicated Block Device. DRBD is like RAID-1 across a network. We’d like to share some notes on a recent issue that involved a DRBD volume jumping into a time-warp and ...

Parent Directory - 2048-cli-0.9-4.git20141214.723738c.el5.i386.rpm 2014-12-14 16:56 12K 2048-cli-nocurses-0.9-4.git20141214.723738c.el5.i386.rpm 2014-12-14 16:56 11K 389-admin-1.1.29-1.el5.i386.rpm 2012-03-28 00:01 412K 389-admin-console-1.1.8-1.el5.noarch.rpm 2011-08-09 23:30 203K 389-admin-console-doc-1.1.8-1.el5.noarch.rpm 2011-08-09 23:30 40K 389-adminutil-1.1.20-1.el5.i386.rpm 2014-03-21 ... Mar 06, 2017 · This means it will operate on the remaining disk, and monitoring tools should inform operators that a node is unavailable. When a node re-appears, DRBD will replay or rebuild until the offline node is again in sync. Again, this is just like a regular disk mirror. Fencing for Fun and Profit with SBD. ... and disk (stop a rogue process from writing anything to shared storage) fencing. ... # pcs property set stonith-watchdog ... SBD Stonith Device. This is another variation for 2-node clusters, which also requires a 3rd machine, though not one managed in this pacemaker cluster. Here, an SBD (Storage-Based Death) is a disk or disks that can be accessed from both (all) nodes.

Attach a new disk on both nodes (common disk). This disk will host our data that will be nfs-shared over the network. (optional) Attach a new network card on both nodes dedicated to inter-cluster communication (heartbeat). Then we can boot nfs-server2, change it's hostname running: $ sudo hostnamectl set-hostname nfs-server2 CentOS7.xでPacemakerを使ってHAを構成する場合、下記2通りの方法があった。 RHEL/CentOS7.x で提供されている High Availability オプションを利用(RHELのはオプションで有償)Linux-HA Japan 提供のPacemakerパッケージを利用あとCLUSTEPROとかの商用製品 以下では情報量の多い&便利なプラグインが用意されている ...
Complete summaries of the 3CX Phone System and Debian projects are available.; Note: In case where multiple versions of a package are shipped with a distribution, only the default version appears in the table. Jun 03, 2013 · Building a ZFS Storage Appliance (part 1) Introduction The company I worked for has this "cloud computing" thing (i.e. selling virtualized computing resources) and it's all based around running traditional hypervisors (VMware at the moment).

sbd - Man Page. STONITH Block Device daemon Synopsis. sbd <-d /dev/...> [options] command Summary. SBD provides a node fencing mechanism (Shoot the other node in the head, STONITH) for Pacemaker-based clusters through the exchange of messages via shared block storage such as for example a SAN, iSCSI, FCoE. Running Linux-HA on a IBM System z 2/47 ©2013 IBM Corporation Computer Cluster A computer cluster consists of a set of loosely connected computers that work together so that in many respects they can be viewed as a single system. (wikipedia: Computer Cluster) High Availability Cluster When one node fails another node is taking over IP address ... #查看刚才配置的stonith当出现脑裂时将会执行的动作 [[email protected] ~]# pcs property --all |grep stonith-action. stonith-action: reboot. 测试STONITH设置是否正确设置并生效. pcs status #先查看刚才创建的stonith资源MyVMwareFence是否已经在某个节点启动了(然后执行下面的验证)

sbd - Man Page. STONITH Block Device daemon Synopsis. sbd <-d /dev/...> [options] command Summary. SBD provides a node fencing mechanism (Shoot the other node in the head, STONITH) for Pacemaker-based clusters through the exchange of messages via shared block storage such as for example a SAN, iSCSI, FCoE. The shared disk would be in one or the other datacenter, but not both, or can it? If we lose the datacenter that is hosting the SBD then we lose it. We are thinking about using Azure to host an iSCSI target device for this, but this means that our on-prem clusters would rely on a SBD STONITH device in the cloud.

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primitive stonith_sbd stonith:external/sbd \ params sbd_device="/dev/sbd" The sbd agent does not need to and should not be cloned. If all of your nodes run SBD, as is most likely, not even a monitor action provides a real benefit, since the daemon would suicide the node if there was a problem. This entry was posted in PACEMAKER CLUSTER and tagged How to use shared disk for STONITH, pacemaker stonith configuration, STONITH SBD configuration, testing sbd communication on July 25, 2017 by learnitfromshiva. HOW TO CREATE A TWO NODE SIMPLE PACEMAKER CLUSTER Oracle White Paper — Oracle Clusterware 11g Release 2 6 Both file types are stored in Oracle ASM disk groups as other database related files are and therefore utilize the ASM disk group configuration with respect to redundancy. This means that a normal redundancy disk group will hold a 2-way-mirrored OCR. A failure of one disk in the disk (1) Fencing and STONITH are not the same thing. Fencing is shutting off access to a shared resource (e.g. a LUN on a disk array) from another possibly contending node. STONITH is shutting down the possibly contending node itself. They're quite different in both implementation and operational significance.

Nov 13, 2013 · Linux Cluster Part 3 – Manage Cluster Nodes and Resources – Learn how to manage Linux Cluster Resources (resource constraints – group, order, colocation, …) and Learn how to manage Linux Cluster Nodes (maintenance mode, standby mode, …).

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Introduction to HA Clusters 3m Installing Pacemaker 4m Creating the Cluster 6m Understanding STONITH and QUORUM 5m Clustering an IP Address 8m Installing and Configuring Apache 8m Clustering Apache 5m Summary and What's Next 8m Ramblings of another techie. A primary objective of MHA is automating master failover and slave promotion within short (usually 10-30 seconds) downtime, without suffering from replication consistency problems, without performance penalty, without complexity, and without changing existing deployments. One common method of fencing, is using SCSI reservation. Another common method is STONITH. The SCSI Reservation Mechanism Most SCSI disks support a 'SCSI reservation' command. If a machine sent such a command to the disk, it works as a "lock" against I/O coming from other machines.

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Linux-HA Release 2 Tutorial. Alan Robertson Project Leader – Linux-HA project [email protected] IBM Systems &amp; Technology Group Industry Technology Leadership Team HA Subject Matter Expert. Tutorial Overview. HA Principles Installing Linux-HA Basic Linux-HA configuration Configuring Linux-HA

pcs property set stonith-watchdog-timeout=0 Critical: Do not stop sbd or sbd_remote on any node until stonith-watchdog-timeout has been unset/deleted. Storage-based self-fencing with resource recovery. With this configuration, in addition to the above functionality, the cluster will use shared storage as a disk-based poison pill:  

you can share data on that device with other PGP Whole Disk Encryption for Windows or Mac OS X users. PGP Virtual Disk volumes uses part of your hard drive space as an encrypted virtual disk volume with its own drive letter. A PGP Virtual Disk is the perfect place for storing your sensitive files; it is as if you have stored them in a safe. SBD Stonith Device. This is another variation for 2-node clusters, which also requires a 3rd machine, though not one managed in this pacemaker cluster. Here, an SBD (Storage-Based Death) is a disk or disks that can be accessed from both (all) nodes.

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STONITH je pragmatické řešení: bylo by příliš složité a pomalé zabezpečit se proti všem typům chyb, tak zkusíme zajistit, že nefunkční server vždycky přestane pracovat, a zajistíme to co nejdřív. Configure the STONITH device itself to be able to fence your nodes and accept fencing requests. This includes any necessary configuration on the device and on the nodes, and any firewall or SELinux changes needed. Test the communication between the device and your nodes. Highly Available iSCSI Storage with SCST, Pacemaker, DRBD and OCFS2 - Part1 13 minute read , Mar 01, 2016 On This Page

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Terjumpa di archive.org [tulisan saya masa di Ittutor.net & Rangkaian.net] System Engineer : Tips and Trick Written by rizal Monday, 20 June 2005 Jom kita share sama2 pengalaman dan tips untuk memperbaiki dan belajar bagaimana nak jadi seorang sistem engineer yang lebih baik.
Fencing is the process of locking resources away from a node whose status is uncertain. There are a variety of fencing techniques available. One can either fence nodes - using Node Fencing, or fence resources using Resource Fencing.

Blue elephant on-demand: PostgreSQL + Kubernetes ... much disk space as the claim StatefulSet ... STONITH (shoot the other node in the head) ... 仮想化環境のゲスト内でもstonithを使いたい! stonith:スプリットブレインやリソース停止故障発生時に 相手ノードを強制的に停止する機能 既存のstonithプラグインは、特定ホスト上のゲストしか 落とせない!(ゲストが別ホストへ移動するとng)

A. RHEL6までは、Quorum Disk(qdisk)というQuorum専用の領域を共有ストレージ上に作成することで擬似的な奇数台構成を作成し、どちらのサーバが生き残るべきかを決定していました。RHEL7からはqdiskが排除され、Quorum Device(qdevice)というQuorum専用のサーバを立てるよう ... SUSE uses cookies to give you the best online experience. If you continue to use this site, you agree to the use of cookies. Please see our cookie policy for details.

This normally comes in the form of STONITH – by taking the other node out of action, we practically reduce the risk of conflict close to zero. The solution Orchestrator supports hooks to do this, but we can also do it easily with ProxySQL using its built in scheduler. Dec 04, 2019 · [발표자료] 오픈소스 Pacemaker 활용한 zabbix 이중화 방안(w/ Zabbix Korea Community) 1. 오픈소스 Pacemaker 홗용한 Zabbix 이중화 방안 Dong hyun Kim Opensource Business Team Enterprise Linux Senior Enginner [email protected] Korea Community Re: [Linux-cluster] R: iscsi-stonith-device stopped. From: Umar Draz; References: [Linux-cluster] iscsi-stonith-device stopped. From: Umar Draz [Linux-cluster] R: iscsi-stonith-device stopped. From: sella gianpietro; Re: [Linux-cluster] R: iscsi-stonith-device stopped. From: Umar Draz 概念介绍: sbd:split brain detection(脑裂检测) stonith: shoot the other node in the head. 在SBD STONITH里,Linux集群的节点们使用心跳机制来保持互相之间的信息更新。 Dec 18, 2014 · The network is reliable? Oh no it isn’t… OK, here’s a little more detail :) Network reliability matters because it prevents us from having reliable communication, and that in turn makes building distributed systems really hard. (Fallacy #1 in Peter Deutsch’s ‘Eight fallacies of distributed computing‘ is ‘The network is reliable’). Heartbeat Tutorial - Free download as PDF File (.pdf), Text File (.txt) or read online for free. Tutorial on how to use heartbeat to achieve high availability under linux.

In a datastore, disks have purposes other than maintaining logs: system state is generally maintained on disk. Log writes must be flushed directly to disk, but writes for state changes can be... Aug 24, 2015 · One common method of fencing, is using SCSI reservation. Another common method is STONITH. The SCSI Reservation Mechanism. Most SCSI disks support a ‘SCSI reservation’ command. If a machine sent such a command to the disk, it works as a “lock” against I/O coming from other machines. Configure the STONITH device itself to be able to fence your nodes and accept fencing requests. This includes any necessary configuration on the device and on the nodes, and any firewall or SELinux changes needed. Test the communication between the device and your nodes.

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Vrihad sanhita in hindi pdfSep 23, 2011 · SBD_DEVICE="/dev/disk/by-id/scsi-14945540000000000000000000300000026060 0000f000000-" SBD_OPTS="-W" At this point, STONITH is configured and you can reboot the nodes in the cluster to verify that it works. Once rebooted, you'll see the STONITH agent that is started from the Heartbeat graphical management interface. Configure SBD: If you have shared storage, for example a SAN or iSCSI target, you can use it avoid split-brain scenarios by configuring SBD. This requires a 1 MB partition, accessible to all nodes in the cluster. The device path must be persistent and consistent across all nodes in the cluster, so /dev/disk/by-id/* devices are a good choice. 20.9 About Disk Quotas 20.9.1 Enabling Disk Quotas on File Systems 20.9.2 Assigning Disk Quotas to Users and Groups 20.9.3 Setting the Grace Period 20.9.4 Displaying Disk Quotas 20.9.5 Enabling and Disabling Disk Quotas 20.9.6 Reporting on Disk Quota Usage 20.9.7 Maintaining the Accuracy of Disk Quota Reporting 21 Local File System Administration Complete summaries of the 3CX Phone System and Debian projects are available.; Note: In case where multiple versions of a package are shipped with a distribution, only the default version appears in the table.

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you can share data on that device with other PGP Whole Disk Encryption for Windows or Mac OS X users. PGP Virtual Disk volumes uses part of your hard drive space as an encrypted virtual disk volume with its own drive letter. A PGP Virtual Disk is the perfect place for storing your sensitive files; it is as if you have stored them in a safe. Av2 Standard is the latest generation of A-series virtual machines with similar CPU performance and faster disk. These virtual machines are suitable for development workloads, build servers, code repositories, low-traffic websites and web applications, micro services, early product experiments, and small databases.

Using Pacemaker with Lustre. From Obsolete Lustre Wiki ... but use something that is immune to device reordering such as the /dev/disk/by ... uses the STONITH (Shoot ... Linux administrators who are planning on implementing a multi-service fail-over cluster implementation in a production environment. Course attendees should be familiar with the basics of system administration in a Linux environment. Sep 09, 2012 · location l-server1-stonith server1-stonith -inf: server1 location l-server2-stonith server2-stonith -inf: server2. For Dell iDrac/IPMI users: I also modified the standard ipmi stonith script so that it will use -C 0 flag when executing ipmitool. I found out the hard way that -C 3 is sent by default, which the Dell iDrac6’s do not like at all. HA Cluster Plugin n Introduction At the heart of the ZFS HA Cluster Plug-in is a mature and stable enterprise class high availability product called RSF-1. It was the first commercial HA solution for Sun/Solaris environments and has an 18+ year track record in data centres worldwide providing high-

Jun 01, 2018 · This write-up details the process of placing a Pacemaker cluster into maintenance mode or freezing the cluster. Enable Maintenance Mode. 1 – Run the pcs property set maintenance-mode=true command to place the cluster into maintenance mode. Issuu is a digital publishing platform that makes it simple to publish magazines, catalogs, newspapers, books, and more online. Easily share your publications and get them in front of Issuu’s ...

Shoot The Other Node In The Head (STONITH) is a mechanism that aims to prevent two nodes from acting as the primary node in an HA cluster, thus avoiding the possibility of data corruption. The following setup is going to be performed on a Virtualbox VM with 1 GB of RAM and 30 GB of disk space plus two network card interfaces. Ramblings of another techie. A primary objective of MHA is automating master failover and slave promotion within short (usually 10-30 seconds) downtime, without suffering from replication consistency problems, without performance penalty, without complexity, and without changing existing deployments.