pacemaker recall

Corosync: It belongs to the Openais (Open Application Interface Specification) in a project Corosync a version of itself does not have the voting function, after Corosync 2.0 introduced Votequorum subsystem also has the voting function, if we use the 1 version of the , but also need to use the votes to make the decision of how to be good, of course, in Red Hat Cman + Corosync combined with, but early cman and pacemaker can not combine, if want to use

Pacemaker: Pacemaker, is a cluster resource manager. It achieves maximum availability for Cluster service node and resource level failure detection and recovery using the messaging and membership capabilities of the preferred cluster infrastructure.Pacemaker is a resource manager and does not provide heartbeat information.heartbeat3.0 components after splitting:Heartbeat: The original message communication

resource or master resource; Master-max: the maximum number of clone resources that can be defined as primary resources. The default value is 1; Master-node-max: Maximum number of clone resources on each node can be promoted to the master resource. The default value is 1; Check whether corosync, pacemaker, crmsh, and pssh are installed in node1 and node2. [Root @ node1 ~] # Rpm-q corosync pacemaker crmsh p

Lab Environment: Two hosts: centos6.5+httpd2.4+php5.5 the basic environment that makes up the web, and the Web page is accessed properly, and ensures that the HTTPD24 service does not boot up. Node1.mylinux.com 10.204.80.79 Node2.mylinux.com 10.204.80.80 I am here to enable ansible to facilitate the management of two nodes, enable a host as a management node, ip:10.204.80.71, in the hosts of the three hosts to add the corresponding name resolution, management node to node1,node2 two nodes enable

The following commands are implemented using crm and pcs. 1. Install corosync and pacemaker with the rpm package in CentOS6.5.Yum-y install corosync pacemaker2. Configure pacemaker to run as the corosync plug-in:Add the following configuration in/etc/corosync. conf:Secauth: on # enable security authentication for communications between cluster nodesInterface {Bindnetaddr: 192.168.0.0 # specify the network a

:/etc/2, install the following RPM package:Cluster-glue,cluster-glue-libsCorosync,corosynclibHeartbeat,heartbeat-libsLibesmtpPacemaker,pacemaker-cts,pacemaker-libsResource-agents# yum Install Cluster-glue# yum Install--nogpgcheck *.rpm (copy heartbeat-3.0.4-2.el6.i686.rpm and heartbeat-libs-3.0.4-2.el6.i686.rpm to the home directory)# yum Install Corosync# yum-y Install LIBESMTP# Yum Install

Tags: corosync NFS pacemaker MySQLCOROSYNC/OPENAIS+PACEMAKER+NFS offers mariadb high availabilityNode I, one, 172.16.249.122/16, 172.16.0.1, CentOS6.6, mariadbNode two, 172.16.249.123/16, 172.16.0.1, CentOS6.6, mariadbNode III, three, 172.16.249.124/16, 172.16.0.1, CentOS6.6, NFSvip:172.16.249.121Node I: one 172.16.249.122Setup #设定ipHostname One.centossed-i [email protected]=.*@[email protected]/etc/sysconf

0. IntroductionAs a member management layer (membership layer) in Ha scheme, Corosync is responsible for the functions of cluster member management, communication mode (unicast, broadcast, multicast), pacemaker as the CRM layer. In the practice of using Corosync +pacemaker, the problemof brain fissure is encountered. What is brain fissure: in HA cluster, the network communication between nodes through the h

#以node01为例修改主机名#node02需要同样的配置[Email protected] ~]# cat/etc/hosts127.0.0.1 localhost localhost.localdomain localhost4 localhost4.localdomain4:: 1 localhost localhost.localdomain localhost6 localhost6.localdomain610.10.10.5 node0110.10.10.6 NODE02#关闭防火墙以及SElinux#node02需要同样配置[Email protected] ~]# Systemctl stop Firewalld[Email protected] ~]# systemctl disable FIREWALLDRemoved Symlink/etc/systemd/system/dbus-org.fedoraproject.firewalld1.service.Removed Symlink/etc/systemd/system/basic.target.wants/f

Pacemaker, is a cluster resource manager. It enables node and resource level failure detection and recovery of the maximum Availability Cluster service (also known as resource management) using the messaging and membership capabilities provided by your preferred cluster infrastructure (Openais or Heaerbeat).It can do clusters of any size and comes with a robust dependency model that enables administrators to accurately express the relationships betwee

commercial or open-source clusters. Currently Corosync is divided into 1 versions and 2 versions, 1 does not have a voting function, and the 2 version has a voting function.Pacemaker OverviewPacemaker OverviewPacemaker is a cluster resource manager that leverages the message and member capabilities provided by the preferred cluster infrastructure (OpenAIS or heartbeat) for fault detection and recycling by secondary nodes and systems, enabling high availability of clustered services (also known

Corosync and pacemaker implement httpd and mysql dual ClustersI. Environment Introduction: Three are dual NIC: openstack-control.example.com openstack-control eth0: 172.16.171.100 eth1: 10.1.1.100 openstack-nova.example.com openstack-nova eth0: 172.16.171.110 eth1: Drawing openstack-neutron eth0: 172.16.171.120 eth1: 10.1.1.120 II. The configuration steps of corosync and pacemaker are as follows: 1. Configu

Lab environment: Install: Yum install corosync pacemaker-y Copy the configuration file CP corosync. conf. Example corosync. conf Vim corosync. conf Edit the configuration file: Compatibility: whitetankCompatible with corosync 0.8Totem {Defines the heartbeat information transfer layer between clustersVersion: 2 ---- versionSecauth: On --- whether to enable Security AuthenticationThreads: 0 --- How many threads are enabled to process heartbeat inf

This article is from DBAnotes. Original article title: DRBD and Pacemaker If someone asks you if a PC server can reach 99.99% high availability, what should you do? Maybe no machine can "Make sure" to achieve this availability. Of course, there may be no problems in a certain period of time, but it must be luck, however, high availability is basically impossible to achieve the goal through one machine. More often, we design solutions to ensure that t

Corosync and pacemaker implementation of the high availability of the difficulties in the CRM command, subcommand, more parameters, and so on, the following some common examples.One, CRM has two kinds of working methods 1, batch mode, which is to enter commands directly on the shell command line2, interactive mode (CRM (live) #) enters into Crmsh for interactive execution Second, the order detailed 1, First ORDER subcommand The code is

One: Experimental environment Node OS Ip Drbd_ip DRBD with HDD Vip Web1 centos5.10 192.168.10.11 172.16.1.1 /dev/sdb 192.168.10.100 Web2 centos5.10 192.168.10.12 172.16.1.2 /dev/sdb 1. Where the two-node IP address is set as above: 2. Two nodes have been configured with mutual SSH trust and have done time synchronization Two: Install related software (both nodes 1 and 2 are installed) 1. Insta

Tags: corosync pacemakerFirst, the environment introduction:Three are dual network cards:Openstack-control.example.com Openstack-controleth0:172.16.171.100eth1:10.1.1.100Openstack-nova.example.com Openstack-novaeth0:172.16.171.110eth1:10.1.1.110Openstack-neutron.example.com Openstack-neutroneth0:172.16.171.120eth1:10.1.1.120Second, Corosync and pacemaker configuration steps are as follows:1. Configure time zones and sync times2. Configure the cluster

One: Experimental environment node os ip san_ip VIP node1 rhel 6.5 192.168.10.11 172.16.1.1 192.168.10.100 node2 Rhel 6.5 192.168.10.12 172.16.1.2 san rhel 6.5 172.16.1.3 /table> Note:The concept of 1.corosync and pacemaker is not said here, there is a lot of information on the In

HTTP high availability + Load balancer Corosync + pacemaker + pcsOpenStack Pike Deployment Directory Rollup http://www.cnblogs.com/elvi/p/7613861.html#http高可用 + Load Balancer pacemaker+haproxy#http+corosync+pacemaker+pcs+haproxy#ssh-free authentication, you must set http://www.cnblogs.com/elvi/p/7736521.html######################## #所有节点 # Installing Pacemake Cor

one of the platforms:1. Set into primary:DRBDADM----Overwrite-data-of-peer primary drbdweb2. Format and MountMkfs.ext4/dev/drbd0Mkdir/drbdMount/dev/drbd0/drbd3. Create a file, uninstall it, and set it to secondaryTouch/drbd/somethingUmount/drbdDrbdadm Secondary DrbdwebUpgrade to primary on another platform to mount and see if there are any files that you just created:DRBDADM Primary DrbdwebDrbd-overviewMkdir/drbdMount/dev/drbd0/drbdLs/drbdAt this point, the DRBD experiment has been completed.He