rocket failover

/sh/check_nginx.sh#!/bin/Bash COUNT=$ (ps-c nginx--no-header |WC-l)if["${count}"="0"];then Echo"re-start Nginx"Sleep2COUNT=$ (ps-c nginx--no-header |WC-l)if["${count}"="0"];then systemctl stop keepalived Fifi# chmod a+x/data/sh/check_nginx.sh[Email protected] ~]# crontab-e*/1 * * * */data/sh/check_nginx.sh >>/var/log/check_nginx.logTest : When we try to stop Nghinx, when we stop the nginx manually for about 2 seconds, the keepalived is turned off and the VIP transfer is realized.Browser Access B

protected] ~]# ll/mnt/Total dosage 20-rw-r--r--1 root root 884 August 13:50 Inittabdrwx------2 root root 16384 August 13:49 lost+found13. DRBD Dual Main Mode configuration exampleThe first time you set a node to become the primary node in DRBD 8.4[Email protected] ~]# Drbdadm primary--force R0Example of configuring a resource dual Master model:Resource R0 {NET {Protocol C;Allow-two-primaries Yes;}startup {Become-primary-on both;}Disk {Fencing Resource-and-stonith;}Handlers {# Make sure the othe

Org.apache.hadoop.yarn.server.resourcemanager.rmapp.attempt.rmappattemptimpl:appattempt_1466451117456_ 12139_000002statechangefromfinal_savingtofailed2016-06-26 12:35:41,504nBsp;infoorg.apache.hadoop.yarn.server.resourcemanager.rmapp.rmappimpl:thenumberof failedattemptsis0.Themaxattemptsis22016-06-26 12:35:41,505infoorg.apache.hadoop.yarn.server.resourcemanager.applicationmasterservice: registeringappattempt:appattempt_1466451117456_12139_0000032016-06-26 12:35:41,505infoorg.apache.hadoop.yarn.

Tags: blog Io ar SP Div 2014 art question on In a recent project, the customer requires a high-load trial. The so-called high-load trial shows the performance of the system when the CPU usage or memory usage is extremely high. In the first round of the kernel test, we used the compression and decompression methods on the Linux operating system to occupy the CPU. This solution has the disadvantage of being time-consuming and uncontrollable than the kernel. In this case, the customer is not com

| +------+--------+----------------+-----------+-----------+------------+----------------+----------------+---------------------+------+--------------------+------------+----------------------+----------------------+--------------------+ 1rowinset(0.10sec) That is to say, the event can only be triggered on the master node, but not on the slave node. Otherwise, if the slave node is triggered, synchronization replication will break down. After the master-slave

letter, and the Q-drive is used as the quorum disk for the cluster. Here is the first disk named Q disk as the quorum disk for the cluster After all configuration is complete sql-cl01 (HSR 50) such as (L SQL log disk, q quorum disk, S SQL data disk) After Sql-cl01 (HSR 50) is set up, we need to do the same iSCSI setup on sql-cl02 (HSR 51) and assign the same drive letter to the three iSCSI virtual disks on ABC-DC, so You can access the previously created iSCSI disks on SQL-CL01 and SQL-CL0

Optime: Read Oplog.rs collection. The last time the instance was changed.MongoDB uses lastheartbeat for automatic transfer.The Mongod instance sends a heartbeat packet to the other members every two seconds, and the member's state is judged by the health of the member returned in Rs.status (). If the primary node is unavailable, then all secondary nodes in the replication set will trigger an election operation. Select the new primary node. If there are multiple secondary nodes, the node that ha

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The following is a detailed analysis of the use of Oracle switchover and failover, the need for friends under the reference The role switching between Data guard master and subordinate libraries is divided into the following two kinds:1) SwitchoverSwithchover are usually artificial and planned for role swaps, such as upgrades. It is usually lossless, that is, there will be no loss of data. its implementation is mainly divided into two stages: 1.Prim

Received a mail consultation today how to implement a virtual machine affinity policy in Windows Server 2012, a technical home familiar with VMware vsphere Solutions is sure to be familiar with a dynamic migration strategy called DRS, The VM affinity policy can be configured to control two virtual machine applications running on different physical ESXi hosts. This function is still very practical, for example, if a virtual machine application runs a guest cluster, one of the basic requirements i

Tags: eee Create server Add introduction c51 AAC status codeSQL Server Failover +alwayson Add database to availability GroupThe configuration of SQL Server Failover +alwayson has been described in detail in the previous articles, and today we mainly introduce the addition of databases to availability groups under SQL Server Failover Cluster+alwaysonWe first need

3 pieces in front of us. The full configuration of SQL Server Failover cluster+ AlwaysOn is described, and today we'll show you how to add multiple client access points to AlwaysOn, in general, There is only one single availability group listener (Listener) per availability group, but in some extreme cases multiple listeners may be created for the same availability group. For example, some historical problems. At this point, you may need to create an

Problem With the release of SQL Server 2005, Database mirroring technology has become a very popular way to solve fault problems. A big problem with database mirroring, however, is that failover (failover) only works on the failed main library, and when a database fails, the standby database in the system takes its place immediately, but all other databases remain on the original server. The disadvantage o

SQL Server configuration database mirroring, there may be friends will be more confused, you do two database out, their IP address is not the same, when the database switch past, my database connection string can be good? Do you have to control which database is connected in the code?In fact, the problem is that using ADO or SQL Native client to automatically connect to a failover partner, the connection string looks like this:Connectionstring= "DATAS

Label:Original: SQL Server 2012 exception Issue (i)--failover cluster + mirroring environment causes job execution to failFirst of all, thank you. My colleagues first found this issue, thanks: Xiangfei, Zhi-Gang, Hye-youngRecently found a strange problem in the production environment;Environment: WINDOWS 2012+sqlserver SP1, two-node failover cluster + Single-node SQL Server SP1 instance (mirrored)The produc

Tags: SQL Server database AlwaysOn3. installation"fail-over cluster"function3.1 Open Server Manager on SQL01 and click on "Add Roles and Features"650) this.width=650; "src=" http://s3.51cto.com/wyfs02/M01/73/2B/wKiom1X21zzR-bvUAAJZ73g2tdI680.jpg "title=" 1.png " alt= "Wkiom1x21zzr-bvuaajz73g2tdi680.jpg"/>3.2 Next650) this.width=650; "src=" http://s3.51cto.com/wyfs02/M02/73/28/wKioL1X22X2zx7ZjAAKs1jrYFl8435.jpg "title=" 2.png " alt= "Wkiol1x22x2zx7zjaaks1jryfl8435.jpg"/>3.3 Next650) this.width=65

1, confirm the relationship between DM. $nas _server-i-A 2, confirm the existence of iSCSI LUNs, if there is a need to verify that the Windows client Maxrequestholdtime value has been set to 600 seconds, the default is 60 seconds. 3. Verify that all file systems are in Mount state. $server _mount server_2 | grep mount 4, verify that the DM can failover to the standby machine. $server _standby server_2-verify Mover 5, switch to standby, it takes

;NBSP;REDIS-CLI slaveof nbsp 192.168.7.44 6379 #查看主上的主从状态 redis-cli-h 192.168.7.44-p 63info Replication #可以看到从状态 #随意查看一台从的主从状态 redis-cli-h 192.168.7.40-p 6379 info Replication------------------ 1.2 Start Redis Sentinel (ip:46) # Sentinel's configuration file for sentinel.conf copy the following configuration, modify the IP address. Cat/usr/local/redis-2.6.9/sentinel.conf Sentinel Monitor Test1 192.168.7.40 6379 1 #修改IP地址, IP can be any IP address in the cluster. Sentinel Down-after-

Tags: init.d aio software server amp Mask self-wget multiple turn from MySQL High Availability: mysql+lvs+keepalived load balancing and failover-kk--focus Data-Blog channel-csdn.nethttp://blog.csdn.net/kk185800961/article/details/51115264# System Information: 192.168. 1.152 5.6 5.6. A 192.168. 1.153 5.6 5.6. A VIP 192.168. 1.150 MySQL primary master synchronization is set Auto-increment-offset,auto-increment-increment

Archived applied---------- ------------------- ------------------- --------- --------------------------- Wu 　　 .- -- to Geneva: -: the .- -- to Geneva: -: +YES NO Wu 　　 .- -- to Geneva: -: the .- -- to Geneva: -: +Yes YesAlterSystem ArchiveLog Current; AlterSystem ArchiveLog Current; SelectSequence#,first_time,next_time,archived,applied fromV$archived_logwheresequence#=(Select Max(sequence#) fromV$archived_log); sequence# first_time next_time Archived applied---------- --------