Dual-machine disaster recovery configuration scheme of MongoDB and KT

Assume that there are two data centers (2/3 and 123/124 of test servers) for mutual disaster recovery (the disaster recovery data center is on standby for external services at the master data center ), applications only connect to the storage services of their own data centers (mongodb1.6.5 and KT 0.9.28). The storage services between the two data centers need to be synchronized with each other. The solution is as follows:

No.	MachineIPAnd Port	Service	Remarks
1	IP address 192.168.2.2: 10000	Master Data Center MongoDB mascript	And 8-way Synchronization
2	IP address 192.168.2.2: 20000	Primary data center MongoDB replica set1	2, 5, 9, 12 are data nodes, and 7, 14 are forensic nodes.
3	IP address 192.168.2.2: 30000	Primary data center KT node1	And 10 bidirectional Synchronization
4	IP address 192.168.2.3: 10000	Active Data Center MongoDB slavea	Copy data from 1 to 8
5	IP address 192.168.2.3: 20000	Primary data center MongoDB replica set2	2, 5, 9, 12 are data nodes, and 7, 14 are forensic nodes.
6	IP address 192.168.2.3: 30000	Primary data center KT node2	And 13 bidirectional Synchronization
7	IP address 192.168.2.3: 40000	Primary data center MongoDB replica arb1	Forensic Server 1
8	192.168.2.123: 10000	Disaster recovery data center MongoDB masterb	And 1 bidirectional Synchronization
9	192.168.2.123: 20000	Disaster recovery data center MongoDB replica set3	2, 5, 9, 12 are data nodes, and 7, 14 are forensic nodes.
10	192.168.2.123: 30000	Disaster recovery data center KT node1	And 3 bidirectional Synchronization
11	192.168.2.124: 10000	Disaster recovery data center MongoDB slaveb	Copy data from 1 to 8
12	192.168.2.124: 20000	Disaster recovery data center MongoDB replica set4	2, 5, 9, 12 are data nodes, and 7, 14 are forensic nodes.
13	192.168.2.124: 30000	Disaster recovery data center KT node2	And 6-way Synchronization
14	192.168.2.124: 40000	Disaster recovery data center MongoDB replica arb2	Forensic Server 2

This configuration set has the following features:

1. four copies of MongoDB Master/Slave structured data

2 MongoDB replica sets structure data storage 4 copies

3. Each KT2 node stores two copies of data(If you use KT like memcached, you need to use the same hash for different Server IP addresses on the client to hash keys to different nodes, that is, if the endpoint is not used as the hash value, the same key is kept and the same node is obtained after the Failover. This is only the logic of the client, synchronization between a group of nodes is only required for the server)

4. After switching to the disaster recovery data center, no configuration changes are required. After the data center is ready, make sure that the active server of the replica set is in the disaster recovery data center, otherwise, applications in the disaster recovery data center may still access the storage service in the data center.

Note:

1. In addition to four replica sets, two verification nodes are required because, after testing, if two replica sets in the same data center are quickly disabled, the master node cannot be correctly elected. If data backup in the same data center is not required, we can consider using only two data nodes.

2. tests show that if you do not subscribe to 1 on November 11, you can only accept 8 data changes. 1 data changes will not come over. This is also a defect of MongoDB. Cascade replication is not supported, if you subscribe to 1, two bandwidths will be generated in the leased line.

 

The specific configuration is as follows:

192.168.2.2

MongoDBMaster Port10000/11000

/Root/mongodb-linux-x86_64-1.6.5/bin/mongod -- fork -- port 10000 -- dbpath/opt/MongoDB/10000 -- logpath/opt/MongoDB/10000/log -- rest -- oplogsize 1024 -- logappend -- master -- slave -- source 192.168.2.123: 10000 -- slavedelay 10 -- autoresync

MongoDB relica set 1Port20000/21000

/Root/mongodb-linux-x86_64-1.6.5/bin/mongod -- fork -- port 20000 -- dbpath/opt/MongoDB/20000 -- logpath/opt/MongoDB/20000/log -- replset blub -- rest -- oplogsize 1024- logappend

/Root/mongodb-linux-x86_64-1.6.5/bin/Mongo -- port 20000

Config = {_ ID: 'blub', members :[

{_ ID: 0, host: '192. 168.2.2: 100 '},

{_ ID: 1, host: '192. 168.2.3: 100 '},

{_ ID: 2, host: '192. 168.2.123: 100 '},

{_ ID: 3, host: '192. 168.2.124: 100 '},

]}

Rs. Initiate (config)

Rs. Status ()

Rs. addarb ("192.168.2.124: 40000 ")

Rs. addarb ("192.168.2.3: 40000 ")

KT node1Port30000/31000

Kchashmgr create/opt/Kt/30000.kch

Ktserver-port 30000-ulog/opt/Kt/30000-ulog-Sid 1-mhost 192.168.2.123-mport 30000-RTS/opt/Kt/30000.rts-plsv/usr/local/libexec/ktplugservmemc. so-plex "Port = 31000 # opts = F"-DMN/opt/Kt/30000.kch

192.168.2.3

MongoDBSlave Port10000/11000

/Root/mongodb-linux-x86_64-1.6.5/bin/mongod -- fork -- port 10000 -- dbpath/opt/MongoDB/10000 -- logpath/opt/MongoDB/10000/log -- rest -- oplogsize 1024 -- logappend-slave -- slavedelay 2 -- autoresync

/Root/mongodb-linux-x86_64-1.6.5/bin/Mongo -- port 10000

Use local

DB. Sources. insert ({"host": "192.168.2.2: 10000 "});

DB. Sources. insert ({"host": "192.168.2.123: 10000 "});

MongoDB relica set 2Port20000/21000

/Root/mongodb-linux-x86_64-1.6.5/bin/mongod -- fork -- port 20000 -- dbpath/opt/MongoDB/20000 -- logpath/opt/MongoDB/20000/log -- replset blub -- rest -- oplogsize 1024- logappend

/Root/mongodb-linux-x86_64-1.6.5/bin/mongod -- fork -- Port 40000 -- dbpath/opt/MongoDB/40000 -- logpath/opt/MongoDB/40000/log -- replset blub -- rest -- oplogsize 1- logappend

/Root/mongodb-linux-x86_64-1.6.5/bin/Mongo -- port 20000

Config = {_ ID: 'blub', members :[

{_ ID: 0, host: '192. 168.2.2: 100 '},

{_ ID: 1, host: '192. 168.2.3: 100 '},

{_ ID: 2, host: '192. 168.2.123: 100 '},

{_ ID: 3, host: '192. 168.2.124: 100 '},

]}

Rs. Initiate (config)

Rs. Status ()

Rs. addarb ("192.168.2.124: 40000 ")

Rs. addarb ("192.168.2.3: 40000 ")

KT node2Port30000/31000

Kchashmgr create/opt/Kt/30000.kch

Ktserver-port 30000-ulog/opt/Kt/30000-ulog-Sid 1-mhost 192.168.2.124-mport 30000-RTS/opt/Kt/30000.rts-plsv/usr/local/libexec/ktplugservmemc. so-plex "Port = 31000 # opts = F"-DMN/opt/Kt/30000.kch

192.168.2.123

MongoDBMaster Port10000/11000

/Root/mongodb-linux-x86_64-1.6.5/bin/mongod -- fork -- port 10000 -- dbpath/opt/MongoDB/10000 -- logpath/opt/MongoDB/10000/log -- rest -- oplogsize 1024 -- logappend -- master -- slave -- source 192.168.2.2: 10000 -- slavedelay 10 -- autoresync

MongoDB relica set 3Port20000/21000

/Root/mongodb-linux-x86_64-1.6.5/bin/mongod -- fork -- port 20000 -- dbpath/opt/MongoDB/20000 -- logpath/opt/MongoDB/20000/log -- replset blub -- rest -- oplogsize 1024- logappend

/Root/mongodb-linux-x86_64-1.6.5/bin/Mongo -- port 20000

Config = {_ ID: 'blub', members :[

{_ ID: 0, host: '192. 168.2.2: 100 '},

{_ ID: 1, host: '192. 168.2.3: 100 '},

{_ ID: 2, host: '192. 168.2.123: 100 '},

{_ ID: 3, host: '192. 168.2.124: 100 '},

]}

Rs. Initiate (config)

Rs. Status ()

Rs. addarb ("192.168.2.124: 40000 ")

Rs. addarb ("192.168.2.3: 40000 ")

KT node1Port30000/31000

Kchashmgr create/opt/Kt/30000.kch

Ktserver-port 30000-ulog/opt/Kt/30000-ulog-Sid 2-mhost 192.168.2.2-mport 30000-RTS/opt/Kt/30000.rts-plsv/usr/local/libexec/ktplugservmemc. so-plex "Port = 31000 # opts = F"-DMN/opt/Kt/30000.kch

192.168.2.124

MongoDBSlave Port10000/11000

/Root/mongodb-linux-x86_64-1.6.5/bin/mongod -- fork -- port 10000 -- dbpath/opt/MongoDB/10000 -- logpath/opt/MongoDB/10000/log -- rest -- oplogsize 1024 -- logappend -- slave -- slavedelay 2 -- autoresync

/Root/mongodb-linux-x86_64-1.6.5/bin/Mongo -- port 10000

Use local

DB. Sources. insert ({"host": "192.168.2.123: 10000 "});

DB. Sources. insert ({"host": "192.168.2.2: 10000 "});

MongoDB relica set 4

/Root/mongodb-linux-x86_64-1.6.5/bin/mongod -- fork -- port 20000 -- dbpath/opt/MongoDB/20000 -- logpath/opt/MongoDB/20000/log -- replset blub -- rest -- oplogsize 1024 -- logappend

/Root/mongodb-linux-x86_64-1.6.5/bin/mongod -- fork -- Port 40000 -- dbpath/opt/MongoDB/40000 -- logpath/opt/MongoDB/40000/log -- replset blub -- rest -- oplogsize 1 -- logappend

/Root/mongodb-linux-x86_64-1.6.5/bin/Mongo -- port 20000

Config = {_ ID: 'blub', members :[

{_ ID: 0, host: '192. 168.2.2: 100 '},

{_ ID: 1, host: '192. 168.2.3: 100 '},

{_ ID: 2, host: '192. 168.2.123: 100 '},

{_ ID: 3, host: '192. 168.2.124: 100 '},

]}

Rs. Initiate (config)

Rs. Status ()

Rs. addarb ("192.168.2.124: 40000 ")

Rs. addarb ("192.168.2.3: 40000 ")

KT node2Port30000/31000(And192.168.2.4: 30000Synchronization)

Kchashmgr create/opt/Kt/30000.kch

Ktserver-port 30000-ulog/opt/Kt/30000-ulog-Sid 2-mhost 192.168.2.3-mport 30000-RTS/opt/Kt/30000.rts-plsv/usr/local/libexec/ktplugservmemc. so-plex "Port = 31000 # opts = f" DMN/opt/Kt/30000.kch