MySql High Availability Class Part 2

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Errata Sheet for MySQL High Availability
(D61920GC10)
Date Generated: 27-May-10

Lesson Page
03

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Details
Original
Lab 3-A, Step 1. Edit the configuration file to add the log-bin option under the
[mysqld] heading. Close and save the configuration file.

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[mysqld]
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log-bin=mysql-bin

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binlog_format=mixed
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Lab 3-A, Step 2. Restart the MySQL
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shell>
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Lab 3-A, Step 3. Locate the binary log files in the datadir.
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Revision
Details added:

Revision
Details added:
Locate the binary log files in the datadir (/usr/local/mysql/data)
03

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Lab 3-A, Step 4. Perform a data change operation on a table in your database.
Revision
Details added:
mysql> INSERT INTO City VALUES
-> (4990,'Kolkata','IND','Howrah',100000);

MySQL High Availability

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03

8

Original
Lab 3-A, Step 5. Use mysqlbinlog to view the contents. Display the
command and some other information from your previous step.
Revision
Details added:
shell> mysqlbinlog mysql-bin.000001 > abcd.txt
shell> vi abcd.txt

03

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Original
Lab 3-A, Step 8. View the contents of the binary log index file and verify it
matches the previous step. Displays a list of the two files that have been created.

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shell> vi mysql-bin.index
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ha de
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Lab 3-A, Step 9. Issue a PURGE MASTER
LOGS command
ui to delete the first
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binary log
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mysql>
MASTER LOGS to 'mysql-bin.000002';
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li Step 10. Verify the log file has actually been deleted and view the
h

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binary log index again.
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Revision
Details added:

Revision
Details added:
shell> vi mysql-bin.index
03

12

Original
Lab 3-B, Step 1. Setup the master using the following steps:
•
•
•
•

Turn on the binary log (for the master)
Set the server-id to be a unique number
Create a new user with the REPLICATION SLAVE privilege
Create a backup of the master that contains binary log coordinates

MySQL High Availability

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Revision
Details added:

Unauthorized reproduction or distribution prohibited Copyright© 2010, Oracle and/or its affiliates

shell> /etc/init.d/mysql stop
shell> vi /etc/my.cnf
[mysqld]
log-bin=mysql-bin
server-id=123
binlog_format=mixed
shell> /etc/init.d/mysql start

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mysql> GRANT REPLICATION SLAVE ON *.* TO
-> slave @ slave_machine_ip_address IDENTIFIED
-> BY sakila ;

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mysql> QUIT;
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shell> mysqldump -uroot -p o
--add-drop-database
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--lock-all-tables --master-data
world >
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/tmp/dumpfile.sql
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03
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Original
@
t using the following steps:

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Lab 3-B, Step 2.nSetup thee
slave
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(• Turnnon
sethe binary log (for the slave)
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Set
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server-id to be a unique number
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• Load in the backup from the master
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• Setup the binary log coordinates using the CHANGE MASTER TO
Jac
command

•
•

Tell the slave where the master resides using the CHANGE MASTER TO
command
Start replication with SLAVE START

Revision
Details added:
shell> /etc/init.d/mysql stop
shell> vi /etc/my.cnf
[mysqld]
log-bin=mysql-bin
server-id=200
binlog_format=mixed

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shell> /etc/init.d/mysql start

Unauthorized reproduction or distribution prohibited Copyright© 2010, Oracle and/or its affiliates

shell> scp
root@master_machine_ip_address:/tmp/dumpfile.sql /tmp
shell> mysql -uroot –p
mysql> CHANGE MASTER TO MASTER_LOG_FILE=
-> 'mysql-bin.000006', MASTER_LOG_POS=250;

[Get the details for this command from the dump file above]
mysql> CHANGE MASTER TO MASTER_HOST=
-> master_ip_address , MASTER_USER= slave ,
-> MASTER_PASSWORD= sakila ;

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shell> START SLAVE
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ommasterGui
Lab 3-B, Step 3. Perform an INSERT oncthe
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mysql> zINSERT
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( -> n(5000,'Bangalore','IND','Bangalore',100000);
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Lab 3-B, Step 4. Verify the row was received by the slave with a SELECT
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mysql> source /tmp/dumpfile.sql

Revision
Details added:

mysql> SELECT * FROM City WHERE Name=’Bangalore’;
03

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Original
Lab 3-C, Step 4. Perform an INSERT on the master server again
Revision
Details added:
mysql> INSERT INTO world.City (Name, CountryCode)
-> VALUES ('MySQL_land','AUS');

MySQL High Availability

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Unauthorized reproduction or distribution prohibited Copyright© 2010, Oracle and/or its affiliates

03

17

Original
Lab 3-C, Step 5. Verify the row is not added on the slave.
Revision
Details added:
mysql> SELECT * FROM City WHERE Name=’MySQL_land’;

03

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Original
Lab 3-C, Step 13. Perform an INSERT on the master server again
Revision
Details added:

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Lab 3-C, Step 14. Verify the row is added on the slave. a
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Details added:
ng dent
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u Name=’IO_land’;
tWHERE
mysql> SELECT * s
FROM
hopCity
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03
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Original
n
a22. Create
saetable called break on the slave.
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Lab 3-C, z
Step
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mysql> CREATE TABLE break (ID INT NOT NULL

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mysql> INSERT INTO world.City (Name, CountryCode)
-> VALUES ('IO_land','USA');

-> AUTO_INCREMENT PRIMARY KEY);
03

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Original
Lab 3-C, Step 23. Create the same table on the master.
Revision

Details added:
mysql> CREATE TABLE break (ID INT NOT NULL
-> AUTO_INCREMENT PRIMARY KEY);

MySQL High Availability

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Unauthorized reproduction or distribution prohibited Copyright© 2010, Oracle and/or its affiliates

03

18

Original
Lab 3-C, Step 36. Perform an INSERT on the master
Revision
Details added:
mysql> INSERT INTO world.City (Name, CountryCode)
-> VALUES ('Bin_land','CAN');
Verify that the new record was added to the slave also:
mysql> SELECT * FROM City WHERE Name=’Bin_land’;

03

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Original
Lab 3-C, Step 39. As the root user, attempt to insert a row on the slave

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ha CountryCode)
)
mysql> INSERT INTO world.City (Name,
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-> VALUES ('Root_land','GBR');
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Lab 3-C, Step 39. As thesroot
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S the row
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Lab 3-C, Step 41. As a non-super user, attempt to insert a row on the slave
Revision
Details added:
As root user logged into the slave server, create the following non-super user:
mysql> GRANT SELECT, INSERT, UPDATE, DELETE ON *.* TO
-> 'superuser'@'localhost' IDENTIFIED BY 'abcd'
-> WITH GRANT OPTION;
Attempt to insert the following record:
mysql> INSERT INTO world.City (Name, CountryCode)
-> VALUES ('Root_land','GBR');

MySQL High Availability

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Unauthorized reproduction or distribution prohibited Copyright© 2010, Oracle and/or its affiliates

03

22

Original

Lab 3-D, Step 1. Setup the slave as a master to the original master following the
original instructions.
Revision
Details added:
ON THE CURRENT MASTER (WILL BE IDENTIFIED AS SYSTEM B)

mysql> GRANT REPLICATION SLAVE ON *.* TO
-> slave @ slave_machine_ip_address IDENTIFIED
-> BY sakila ;

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mysql> QUIT;

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ON THE CURRENT SLAVE (WILL BE IDENTIFIED
uid A)

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shell> scp
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root@master_machine_ip_address:/tmp/dumpfile.sql
/tmp
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shell> mysql
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toMASTER TO MASTER_LOG_FILE=
aczCHANGE
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mysql>

g ->ce'mysql-bin.000006',
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li position from the dumpfile] MASTER_LOG_POS=250;
h [Get this
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shell> mysqldump -uroot -p --add-drop-database
--lock-all-tables --master-data --databases
world > /tmp/dumpfile.sql

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mysql> CHANGE MASTER TO
-> MASTER_HOST= master_ip_address ,
-> MASTER_USER= slave , MASTER_PASSWORD= sakila ;
mysql> START SLAVE;

03

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Original
Lab 3-D, Step 2. Perform an INSERT on the first system, which we will call
system “A”
Revision

Details added:
mysql> INSERT INTO world.City (Name, CountryCode)
-> VALUES ('OU_land','IND');

MySQL High Availability

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Unauthorized reproduction or distribution prohibited Copyright© 2010, Oracle and/or its affiliates

03

22

Original
Lab 3-D, Step 3. Perform an INSERT on the second system, which we will call
system “B”
Revision
Details added:
mysql> INSERT INTO world.City (Name, CountryCode)
-> VALUES ('Tin_land','CHN');

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Original
Lab 3-D, Step 4. Verify both INSERTs were successful on both systems (“A” and
“B”)

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Perform the following SQL statement on both systems: a n
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mysql> SELECT * FROM City WHERE )Name=’OU_land’
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-> Name=’Tin_land’;
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Lab 3-D, Step 6. Insert asnew
h rowisintoS City on system “B”.
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added:
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ha mysql>
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-> VALUES ('BNG_land','BNG');
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Revision
Details added:

Lab 3-D, Step 8. Perform an INSERT on system “A” with the LOCK’d table
Revision
Details added:
mysql> INSERT INTO world.City (Name, CountryCode)
-> VALUES ('Col_land','SLK');
03

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Original
Lab 3-D, Step 14. 14. Delete the newly added row on system “A”
Revision
Details added:
mysql> DELETE FROM world.City WHERE Name=’Col_land’;

MySQL High Availability

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Unauthorized reproduction or distribution prohibited Copyright© 2010, Oracle and/or its affiliates

03

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Original
Lab 3-D, Step 24. Insert a new row into City on system “A”.
Revision
Details added:
mysql> INSERT INTO world.City (Name, CountryCode)
-> VALUES ('CHN_land','IND');

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Original
Lab 3-D, Step 26. Perform an INSERT on the system “B” with the LOCK’d table
Revision
Details added:

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04

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Lab 4-B, Step 1. Create a new file named /var/lib/mysqlcluster/config.ini
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to the machines at all times.
original
S HA lab was unacceptable because it
sh The

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asked the student g
to@
disconnect
the
system
from the network. The following steps
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are crucial to
h ensuretothat
usthe students can simulate disconnecting the system from
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the network.
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down the MySQL server.
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• shell> /etc/init.d/mysql stop

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2. Create a virtual IP address that you will use during the labs in this course.
mysql> INSERT INTO world.City (Name, CountryCode)
-> VALUES ('DEL_land','IND');

•
3.

View the details for the virtual IP that was created.

•
4.

shell> /labs/start_virtual_ip.sh
shell> ifconfig eth0:1

Write down the inet address for this virtual IP.
______________________________________________

5.

Create a new file named /var/lib/mysqlcluster/config.ini.

•
•

shell> mkdir /var/lib/mysql-cluster
shell> vi /var/lib/mysql-cluster/config.ini

MySQL High Availability

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Unauthorized reproduction or distribution prohibited Copyright© 2010, Oracle and/or its affiliates

04

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Original
Lab 4-B, Step 3. Add the host name for the management server
Revision
hostname=192.168.2.1 (Replace IP with inet address obtained in step 1.4)

04

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Original
Lab 4-B, Step 8. Add in a section for one data node
Revision
Add the hostname to the [NDBD] section also

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[NDBD]
hostname=192.168.2.1 (Replace IP with inet address obtained in step 1.4)

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Add the hostname to the [NDBD] section also ) ha
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[NDBD]
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hostname=192.168.2.1pp
(Replace
uIPdwith inet address obtained in step 1.4)
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04
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Lab 4-B, Stepa10.
Add insaesection for the MySQL server
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lichostname to the [MYSQLD] section also
ha Add the
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hostname=192.168.2.1 (Replace IP with inet address obtained in step 1.4)
04

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Original
Lab 4-B, Step 9. Add in a section for the second data node

04

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Original
Lab 4-B, Step 11. Verify you have defined everything properly
Revision
The config.ini file should look like the configuration below (replacing the IP with
the inet address obtained in step 1.4)
[NDB_MGMD]
hostname=192.168.2.1
datadir=/var/lib/mysql-cluster
[NDBD DEFAULT]
NoOfReplicas=2
datadir=/var/lib/mysql-cluster

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Unauthorized reproduction or distribution prohibited Copyright© 2010, Oracle and/or its affiliates

[NDBD]
hostname=192.168.2.1
[NDBD]
hostname=192.168.2.1
[MYSQLD]
hostname=192.168.2.1
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Original
Lab 4-G, Step 1. Find a second machine, or find another student to work together
on this set of exercises

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Revision
In this lab, two systems will be used to create a cluster. You will need to use the
virtual IP addresses for each of the systems used. It is important to use the eth0:1
IP addresses.

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View the details for the virtual IP that was created. as
) h ide
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• shell> ifconfig eth0:1
co t Gu
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in den
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tu IP.
Write down the inet address
virtual
hofor this
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______________________________________________
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04
20 nOriginal
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Lab
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the management server
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Revision
Choose which machine will be the Cluster Management Server and label this
machine server “A”. On server “A”, edit the /var/lib/mysql-cluster/config.ini file
to contain the following text:
[NDB_MGMD]
hostname=192.168.2.1 (Server “A” Virtual IP Address)
datadir=/var/lib/mysql-cluster
[NDBD DEFAULT]
NoOfReplicas=2
datadir=/var/lib/mysql-cluster
[NDBD]
hostname=192.168.2.1

(Server “A” Virtual IP Address)

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Unauthorized reproduction or distribution prohibited Copyright© 2010, Oracle and/or its affiliates

[NDBD]
hostname=190.145.45.15
[MYSQLD]
hostname=192.168.2.1
[MYSQLD]
hostname=190.145.45.15
04

20

(Server “B” Virtual IP Address)

(Server “A” Virtual IP Address)

(Server “B” Virtual IP Address)

Original
Lab 4-G, Step 2c. Edit the /etc/my.cnf files to both point to the management
server.
Revision
On server “A”, edit the /etc/my.cnf file to include the following:

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ndbcluster
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ndb-connectstring=192.168.2.1 (Server
Virtual IP Address)
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[ndbd]
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connect-string=192.168.2.1
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[ndb_mgm]
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connect-string=192.168.2.1
(Server “A” Virtual IP Address)
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[ndb_mgmd]
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On server “B”, edit the /etc/my.cnf file to include the following:
[mysqld]
ndbcluster
ndb-connectstring=192.168.2.1

04

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(Server “A” Virtual IP Address)

Original
Lab 4-G, Step 12. Restart the cluster, verify it is restarted and the data is still
present. Disable the network (either pull the network cable, or use ifconfig eth0
down) on the non-management server machine.
Revision
On server “B”, disable the network by issuing the following command ONLY:
shell> ifdown eth0:1

MySQL High Availability

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Unauthorized reproduction or distribution prohibited Copyright© 2010, Oracle and/or its affiliates

04

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Original
Lab 4-G, Step 14. Re-enable the network, does the node automatically rejoin?
Revision
On server “B”, Re-enable the network by issuing the following command.
shell> ifup eth0:1

04

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Original
Lab 4-G, Step 19. Disable the network (either pull the network cable, or use
ifconfig eth0 down) on the non-management server machine.

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Revision
On server “B”, disable the network by issuing the following command ONLY:

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Original
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Lab 4-G, Step 20. Re-enable the network, does the node a
automatically rejoin?
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On server “B”, Re-enable the network
t the following command.
n
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shell> ifup eth0:1
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04
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Lab 4-G ended
zh withtoa uquestion to the student
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ha At thelicompletion
of this lab perform the following steps.
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l
1.
In
the

MySQL
client, issue the following commands:
Jac
• mysql> DROP DATABASE world;
shell> ifdown eth0:1

•
•
•

mysql> CREATE DATABASE world;
mysql> USE world;
mysql> SOURCE /labs/world.sql

2. In the NDB management client (ndb_mgm), issue the following
commands:
• ndb_mgm> SHUTDOWN
• ndb_mgm> EXIT

MySQL High Availability

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06

14

Original
Lab 6-B, step 3. Edit the ha.cf file and perform the following actions
Revision
The line which states, “uncomment bcast eth0”, should use eth0:1 instead of eth0.
Make the change in the ha.cf file to reflect this.

06

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Original
Lab 6-B, step 4. Edit the haresources file and perform the following action. Add a
line:
hostname1 virtual_ip_address
Revision
The virtual_ip_address should be the IP address associated with eth0:1.

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On the first host machine (hostname1),
connection by issuing the
t
ng turndeoffnnetwork
following command ONLY: ppi
ho is Stu
s
shell> ifdown
eth0:1th
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u
06
16
Original zh
o the first host machine (hostname1), turn on the network
tOn
ac Steps13.
j
Lab(4-G,

e
g cenby issuing the following command:
nconnection
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Revision
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On the first host machine (hostname1), turn on the network connection by issuing
06

15

Original
Lab 6-B, Step 10. On the first host machine (hostname1), turn off network
connection by issuing the following command:

the following command:
shell> ifup eth0:1

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