openstack ha

System Administrators using the complete vSphere solution use VMware HA to ensure the continuous running of virtual machines. However, if you are using the free version of ESXi, you will not be able to use the VMware HA feature. There are other options to protect your virtual machines by achieving high availability and ensure they are running properly. Before considering other options, let's look at what VM

1. environment Introduction ha management end: luci: 192.168.122.1ha node ricci: 192.168.122.34192.168.122.33 use iscsi shared disk co-ha node on iis82 to create GFS file system 2. iscsi disk sharing server: LVM is used for sharing to facilitate later expansion. [root @ 12782 ~] # Fdisk-cu/dev/sda 1. Environment Introduction Ha management end: luci: 192.168.122.1

Here the ETHERNET0/3 is the HA interfaceCLI Command line configurationSsg-550m-1 (M)Set NSRP Cluster ID 1Set NSRP rto-mirror SyncSet NSRP rto-mirror routeSet NSRP Vsd-group ID 0 Priority 50 (configuration Vsd-group ID 0 precedence)Set NSRP Vsd-group master-always-exist (configuration always has one device as master)Set NSRP Monitor Interface ethernet0/0Set NSRP Monitor Interface ETHERNET0/1Set NSRP Monitor Interface ETHERNET0/2SaveSsg-550m-2 (B)Set NS

Install and configure Rose ha 1.1.1 install Rose ha Copy three installation files of roseha to/data/install to facilitate installation of the two hosts. Before installing Rose HA, modify the hosts file and enter the corresponding host name and IP address. The modification method is the same as that of the Windows Hosts file, we can enter the host name. Modificati

Chd4b1 (hadoop-0.23) for namenode ha installation Configuration Cloudera chd4b1 version already contains namenode ha, the Community also put namenode ha branch HDFS-1623 merge to trunk version, can achieve hot backup of dual namenode, but currently only supports manual switch, does not support automatic switch, switch progress in the community see: https://issues

Brief introductionBy installing the Linux-ha software, we can realize the high availability solution of the Linux dual-machine system, realize the hot backup of the dual-machine system, and be able to switch seamlessly between the two machines, thus externalProvide stable and reliable service, and finally realize the System High performance RAS (reliability, availability, and serviceability). Experimental environment650) this.width=650; "Src=" H

First of all, I have to say sorry, before the environmental damage, has no machine to test, so the previous article to the third end has not found the time and environment to continue testing, here is a brief talk about fuel network.The most complex deployment of OpenStack should be part of the network, fuel simplifies the deployment of OpenStack while the network type is also confusing for beginners, let m

Okay, everybody.We often encounter high-availability, stacking, VRRP, and other dual-machine deployment scenarios in the common Enterprise Edge Network architecture, and in some of the cases described earlier, the basic is a two-machine deployment, a highly available enterprise networking form,So, the basic configuration is also described earlier, but does not describe how to upgrade the hardware in the state of the high-availability of the OS scenario, here because in the last week completed a

OpenStack deployment and O M practicesIntroduction to OpenStack OpenStack is an open-source IaaS implementation. It consists of several associated sub-projects, including computing, storage, and networks. Since its launch as an Apache protocol, more than 2010 companies have joined the OpenStack project since its estab

This article describes the principles of the HA mechanism and the Hadoop2 ha configuration process.————————————————————————————————————————————————————————————————————the principle of HA mechanismThere are two namenode:active NameNode and standby NameNode in Ha. Where active NN is the primary node, and standby nn as th

HA cluster high-availability clusters are divided into the following steps:Dot I-->ha cluster basic conceptDot I-->heartbeat implement haDot I-->corosync detailedDot I-->pacemaker detailedDot I-->drbd detailedDot Me--heartbeat resource management based on CRMDot Me--corosync+pacemaker+drbd+mysql to implement a highly available (HA) MySQL clusterDot Me--heartbeat+

1. Background of HDFS Federation In hadoop 1.0, the single namenode Design of HDFS brings about many problems, including single point of failure (spof), memory restriction, and cluster scalability and lack of isolation mechanisms (different businesses use the same namenode to affect each other) to solve these problems, hadoop 2.0 introduces the HA solution and HDFS Federation based on shared storage, which focuses on HDFS Federation. HDFS Federation m

The main purpose of HA (high availability, highly available) clusters is to increase the online rate of service, that is, to shorten the average The time of the failure. In fact, when a service node is not in the line, another node that provides the same service can continue to provide services to avoid a single point of failure. HA cluster related concepts One, the related noun explanation 1, the online r

(1) The use of the HA switch script, stop the database script and start data script at the end of the need to add the statement "Exit 0" (ha switch when the HA script will check the switch script, ha switch script return value of not 0 will be an error.) Ha switchover failed

MySQL's official HA middlewareHttp://www.mysql.com/products/enterprise/fabric.htmlMySQL Fabric is a extensible framework for managing farms of MySQL Servers. The features has been Implemented-high availability (HA) and scaling out using data sharding. These features can be used in isolation or in combination.Webinar:mysql fabric-high availability automated sharding?Both features is implemented in both laye

1, the HA mode deployment of the NetScaler ha model NetScaler is a bit like FWSM deployment, and there is a significant difference between the deployment of F5. You can first deploy a netscaler on a single node basis, and do all of the related configuration, including Nsip, subnet IP, routing, user name, and related feature. Make sure that everything is configured OK, configure another netscaler, this netsc

1. HDFS ha Introduction Compared to HDFs in Hadoop1.0,hadoop 2.0, two significant features were added, Ha and federaion. HA is the high availability, used to solve the Namenode single point of failure problem, the feature is a hot spare way to provide a backup for the main Namenode, once the main namenode failure, you can quickly switch to standby namenode, So a

Four network cards:Network 1: The physical machine is connected to the virtual machine, for the host-only type, which is used primarily to manage the network, it's DHCP off.Network 2:open Vswitch occupies the network, is also the host-only typeThere are a number of storage components in the network 3:openstack that deliver a large amount of data, which is best transmitted using a single network (which is also recommended in real-world environments), a

"TechTarget China original" Although the online installation tutorials and step-by-steps provided by OpenStack are a great help to administrators, there are still a lot of things that are not satisfactory. So in the process of installing OpenStack on Ubuntu, you can use the following documentation to compensate for the lack of official tutorials. The simplest way to learn how to use

The concept of cluster and high availability (HA), clusterha Reposted from: http://www.cnblogs.com/blackwizard2016/p/5143816.html, which is used only for learning. 1.1 What isCluster To put it simply,Cluster (ClusterIs a group of computers,They provide users with a set of network resources as a whole. TheseA single computer system is a cluster node ). An ideal cluster is that the user will never realize the underlying node of the cluster system. In hi