openstack ha

Today, we will focus on the actual operation steps for correctly implementing the full DB2 dual-host HA solution on the Linux operating system, the following is a detailed description of the actual operation steps for correctly implementing the full DB2 dual-host HA solution on the Linux operating system. We hope you will have a better understanding of the steps after browsing. This document describes how t

I. BACKGROUND The cloud trend in the second half of 2012 began to provide a large state-owned bank's historical transaction data backup and query technology solutions based on Hadoop, due to the industry's particularity, customer service availability has a very high demand, and HDFs has long been a problem with the point of trouble, until Apache Hadoop released its 2.0 alpha version in May 2012, where MRv2 is still immature, and HDFs new features are already largely available, especially the hi

/doc/heartbeat-3.0.4/haresources/etc/ha.d/haresourcesThe contents of the configuration file are as follows:[email protected] ha.d]# cat ha.cfdebugfile/var/log/ha-debuglogfile/var/log/ha-loglogfacility local0keepalive 2deadtime 30warntime 10bcast eth0 # linux#bcast eth1 eth2 # linux#bcast le0 # Solaris#bcast le1 le2 # solarisauto_failback onnode zbdba1node

After the smooth installation of the deployment of Keystone, the original thought that Swift installation and debugging will be like Keystone general, but the process is full of bumpy, in the combination of some functions in the source code, finally successfully completed the installation of Swift, and experimental upload download files and other functions, The following set up the swift installation process, and the problems encountered in the summary, I hope to meet the same problem of people

Network Topology: 650) this. width = 650; "onclick = 'window. open (" http://blog.51cto.com/viewpic.php? Refimg = "+ this. src) 'style = "width: 460px; height: pixel PX" border = "0" alt = "" width = "601" height = "301" src = "http://www.bkjia.com/uploads/allimg/131227/0340234c8-0.gif"/> Requirements: SoftwareThe software versions of the two devices used for HA must be the same. Platform Active/Passive Active/Active

Use keepalived to build highly available MySQL-HA This article describes how to use keepalived to build highly available MySQL-HA to ensure data consistency between the two MySQL instances. Then, keepalived is used to implement virtual IP addresses and automatic switch during MySQL fault is achieved through the service monitoring function provided by keepalived. AD: There are many solutions for MySQL-

In recent years, the success of the OpenStack and Cloudstack projects has been obvious to all, such as Cisco, the Red Hat based on OpenStack, and Citrix's contribution cloudstack to the Apache Software Foundation. Cloudplatform. Puppet Labs and Zenoss are both involved in these open source cloud projects and are willing to share their views and provide references to organizations that plan to implement or

password set in operation 1.2 2.2.3: Under [token], write Action 2.3: Synchronize database command su-s/bin/sh-c "Keystone-manage Db_sync" Keystone, there were 2 errors in the execution of this command Error One: Unable to connect to the database, solution when the environment is ready (see previous article), write the 127.0.0.1 controller in the Hosts file Error two: After fixing the error one, execute the synchronization command, the result appears specified key was too long; Max key length i

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Please refer to the following link for more information: http://www.linuxidc.com/linux/2014-04/99574.htmbased on the shared storage set of rhcs?iscsi=clvmreal-time WebService. Reference website https://access.redhat.com/site/documentation/zh-CN/Red_Hat_Enterprise_Linux/index.html Reading: RHCS + GFS (Red Hat HA + GFS) http://www.linuxidc.com/Linux/2014-04/99574.htm Web Service shared storage cluster architecture http://www.linuxidc.com/Linux/2013-05/8

Start the software to test first. Yum installed Nginx does not require manual startup, and virtual IP does not need to be manually configured. The boot heartbeat has a sequence that starts with the main, starting from.Service heartbeat start or/etc/init.d/heartbeat startAnd see if the Lord Nginx process is up.PS aux |grep nginxSee if the Lord virtual IP is upIfcong or IP addNote: The first boot is slow, please wait patientlyCan be found that the Lord started the Nginx and virtual IP, from the to

Listen to the 12th lesson of the Liaoliang teacher tonight Spark ha combat, class notes and assignments are as follows:Spark ha requires the installation of zookeeper, and a stable version of 3.4.6 is recommended.1. Download zookeeper3.4.6,2. Configure Environment variables3. Create data logs4.VI conf/zoo.cfgCreate myID in the 5 data directoryspark-env.sh Configuring HA:Export spark_daemon_java_opts= "-dspa

because too many Java objects are stored in the memory. If the executor has too many cache objects in the JVM, for example, 80 GB up, how many times of full GC occurs at this time, and you will wonder why my program does not move? You can check the GC log. It was originally in GC. 3. Implement Fault Tolerant tachyon Cluster Based on zookeeper 3.0 prerequisites Hadoop version: 2.2.0.2.0.6.0-101 Zookeeper version: 2.3.5 Tachyon version: 0.4.1 Cluster status: Cluster Masters Sl

Citrix Article Summary:http://www.ctoclubs.com/?p=1132View Original: http://www.ctoclubs.com/?p=1742First, IntroductionNetscalerr official HA feature configurationThe host that needs to be used Host Name IP Address Operating system Configuration Ns1.best.com 192.168.31.30 Outer/10.10.0.31 inside Linux 2 Nuclear 2g100g Ns2.best.com 192.168.31.31 Outer/10.10.0.31 inside Linux 2 Nuc

default, the MariaDB comes with the adatabase named ' test ' that anyone canAccess. This was also intended only for testing, Andshould was removedBefore moving into a productionenvironment.Remove test database and access toit? [y/n] y-Dropping test database ...... success!-Removing privileges on test database ...... success!Reloading the privilege Tableswill ensure that all changes made so farwould take effect immediately.Reload privilege tables now? [y/n] y... success!Cleaning up ...All done!

The database used by the company PostgreSQL, has been running smoothly, but the recent Java new management platform, due to more users, concurrency is relatively large. In addition the new system may also have problems with optimization, so PG often crashes, so I began to study how to matter PG's high-performance, high-availability HA db cluster solution. The main idea is to use PostgreSQL's own stream replication function, to realize the dual-machine

OpenStack Construction and Application in RedHat Linux 1. Introduction to OpenStack OpenStack is a free software and open source code project jointly developed by NASA and Rackspace with Apache license authorization. OpenStack is a cloud platform management project. It is not a software. This project is composed of sev

Original address: http://mt.sohu.com/20160511/n448800357.shtml--"from getting started to mastering Cloud server" sixthThe first five periods of "from getting started to mastering Cloud server" have been widely praised, received messages, many readers are interested in cloud computing related technologies. At the request of the audience, we want to amway a pure technical content. Prepare the seeds, peanuts, with the small series into the basic knowledge of Op