Glassfish JEE Server Administration - Module 4 Load Balancer

1. Module-4: Load Balancer Integration
1
Danairat T.
Line ID: Danairat
FB: Danairat Thanabodithammachari
+668-1559-1446

2. Contents
Module-4: Load Balancer Integration
• Creating HTTP Load Balancer
• Exporting loadbalancer.xml file from Glassfish Enterprise Server
• Installing Web Server and Load Balancer Plug-in
• Importing loadbalancer.xml file to Load Balancer Server
• Testing access Application from Load Balancer
• Reviewing Load Balancer http access log
• Monitoring Application Server Cluster
• Back up the Glassfish Domain, Load Balancer Clients, Clusters
configuration and Deployed Applications
• Reviewing Start All Servers Order
• Test deleting Load Balancer, Cluster, Instances and Restore
• Re-Testing the restored applications
• Reviewing Stop All Servers Order
2

3. The Architecture and Configuration Steps
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app 01
- DAS
-Node Agent
“app01”
- Instance01
app 02
-Node Agent
“app02”
- Instance02
web 01 Session replication
Users
Load distribution
Load distribution
FirewallFirewall
request
LB Plug-in
Configuration Steps:-
• Creating HTTP Load Balancer
• Exporting loadbalancer.xml file from
Glassfish Enterprise Server
• Installing Web Server and Load
Balancer Plug-in
• Importing loadbalancer.xml file to
Load Balancer Server
• Testing access Application from
Load Balancer
• Reviewing Load Balancer http
access log
• Monitoring Application Server
Cluster
• Back up the Glassfish Domain,
Load Balancer Clients, Clusters
configuration and Deployed
Applications
• Reviewing Start All Servers Order
• Test deleting Load Balancer,
Cluster, Instances and Restore
• Re-Testing the restored applications
• Reviewing Stop All Servers Order

4. Creating HTTP Load Balancer
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1. “HTTP Load Balancer” -> “New ”
2. Enter name “lb01” below details, click “OK”

5. Creating HTTP Load Balancer
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3. Restart the instances by click “stop” -> “start”.

6. Exporting loadbalancer.xml file from Glassfish Enterprise Server
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Click “Export Now ” from the “Export” tab menu in the “lb01”. Enter the file name as “loadbalance.xml”.
For this training, We will use this file to
import to load balance server (web01) later.

7. Installing Web Server and Load Balancer Plug-in
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1. At machine “web01”, edit hosts file to be able to access “app01” and “app02”
2. Extract the .gz file to some directory

8. Installing Web Server and Load Balancer Plug-in
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3. Run the “./setup” as below.

9. Installing Web Server and Load Balancer Plug-in
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4. Follow the installation wizard created installed directory and select “custom”.

10. Installing Web Server and Load Balancer Plug-in
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5. Select “Server Core”, “Administration Command Line”, “Sample Applications”.
6. Select install Java SE Development Kit (JDK) 1.5.0_15.
7. Select “Create an Admin Server,
Web Server Instance”

11. Installing Web Server and Load Balancer Plug-in
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8. Enter the password. For this training, use “password”.

12. Installing Web Server and Load Balancer Plug-in
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9. Click “Install Now”

13. Installing Web Server and Load Balancer Plug-in
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10. Click “Finish” and review the installed directory.

14. Installing Web Server and Load Balancer Plug-in
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11. Start Web admin server and instance server.
12. Test access at port 80

15. Installing Web Server and Load Balancer Plug-in
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13. Monitor access log and error log at /sun/webserver7/https-web01/logs/

16. Installing Web Server and Load Balancer Plug-in
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1. At web01 machine, start http “admin-server “and stop “https-web01” instance.
Installing The Glassfish Load Balancer Plugin for Sun WebServer

17. Installing Web Server and Load Balancer Plug-in
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2. Run the setup file (using the same one as set up the Application Server)

18. Installing Web Server and Load Balancer Plug-in
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3. Follow the installation and Create the installed directory.

19. Installing Web Server and Load Balancer Plug-in
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4. Select only “Load Balancing Plugin”, “No Administration Tools”
5. Use existing JDK

20. Installing Web Server and Load Balancer Plug-in
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6. Enter your web instance installed location
7. Enter web server admin’s password.

21. Installing Web Server and Load Balancer Plug-in
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8. Follow the installation step and click “Finish”.

22. Installing Web Server and Load Balancer Plug-in
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9. Review the Load Balancer Plugin installed location.

23. Importing loadbalancer.xml file to Load Balancer Server
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1. Copy “loadbalancer.xml” which export from AppServer to /sun/webserver7/https-web01/config
2. (Re)start web server instance

24. Monitor the Load Balancer Server
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Monitor the load balance health check status.

25. Testing access Application from Load Balancer
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1. At app01 machine, start app01 DAS and node agent

26. Testing access Application from Load Balancer
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2. At app02 machine, start app02 node agent

27. Testing access Application from Load Balancer
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3. Test access the web application from web01 load balancer. Success!

28. Testing access Application from Load Balancer
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4. Test add session data.

29. Testing access Application from Load Balancer
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5. Test stop the instance which is now service to the user session.

30. Testing access Application from Load Balancer
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6. Click “Reload Page”
7. The Load Balancer perform “Fail Over” to another machine instance. Success!
The User Session is
maintainable after “Fail Over”

31. Testing access Application from Load Balancer
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8. Start all instances

32. Testing access Application from Load Balancer
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9. Stop another instance to test Load Balance again

33. Testing access Application from Load Balancer
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10. Monitor the Load Balancer Health Check at web01 machine /sun/webserver7/https-web01/logs/errors
The LB detected
the app01 is in
unHealthy state

34. Testing access Application from Load Balancer
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11. Re-test, Click “Reload Page”
12. The Load Balancer performs “Fail Over” from
app01 to “app02”
The User Session is
maintainable after “Fail Over”

35. Testing access Application from Load Balancer
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13. Start all instances to return the server in normal state.

36. Testing access Application from Load Balancer
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14. Monitor the Load Balancer Health Check at web01 machine /sun/webserver7/https-web01/logs/errors
The LB detected
that app01 is in
a healthy state

37. Reviewing Load Balancer http access log
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You can monitor the LB access log at /sun/webserver7/https-web01/logs/access

38. Monitoring Application Server Cluster
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1. From “cluster01” menu, you can click on each instance to see the status details

39. Monitoring Application Server Cluster
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2. Review the Log. Testing the “Call Flow” monitoring by click “Enabled” and “Save”

40. Monitoring Application Server Cluster
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3. Test access application via LB and see the “Call Flow” data details

41. Monitoring Application Server Cluster
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4. Review the Monitor -> “Runtime status

42. Monitoring Application Server Cluster
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5. Test “Generate Report” to see the cluster diagnostic data.

43. Monitoring Application Server Cluster
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6. The result report can be viewed by Web Browser

44. Monitoring Application Server Cluster
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7. The result report is also including the node agents details

45. Monitoring Application Server Cluster
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8. The cluster Log configuration is separated from the default “Server” configuration
9. The “Availability Service” is enabled by default

46. Monitoring Application Server Cluster
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10. Review the Web Container, EJB Container and JMS Availability.

47. Monitoring Application Server Cluster
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11. You can see the “Listener Port” number from the cluster -> Instance or from “System Properties” menu

48. Monitoring Application Server Cluster
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12. The “GMS” for cluster communication properties

49. Monitoring Application Server Cluster
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13. The default port numbers for each available services

50. Monitoring Application Server Cluster
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14. The JVM setting is subject to provide the Java Virtual Machine Optimization

51. Back up the Glassfish Domain, Load Balancer Clients, Clusters
configuration and Deployed Applications
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1. At app01 machine, Stop node agent and DAS then run backup command.

52. Back up the Glassfish Domain, Load Balancer Clients, Clusters
configuration and Deployed Applications
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2. Review the backup content details

53. Reviewing Start All Servers Order
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1. At app01, Start DAS, node agent.

54. Reviewing Start All Servers Order
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2. At app02, start node agent
3. Start Web Server which is now act as Load Balancer
4. Test access
application via
LB.

55. Test deleting Load Balancer, Cluster, Instances and Restore
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1. Test deleting Load Balancer configuration 2. Continue deleting the Cluster.

56. Test deleting Load Balancer, Cluster, Instances and Restore
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3. After delete cluster and Load Balancer from DAS and access application from http://web01,
The application will display “unavailable”

57. Re-Testing the restored applications
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4. At app01, stop node agent and DAS 5. Restore from backup file

58. Re-Testing the restored applications
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6. At app01, start DAS and node agent
7. At app02, start node
agent

59. Re-Testing the restored applications
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8. Login to admin console and review all configuration were came back from the restore

60. Re-Testing the restored applications
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9. The application is now back to service after done restore. Success

61. Re-Testing the restored applications
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10. Test add session data to the web application which is located in “app01”

62. Re-Testing the restored applications
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11. Test stop instance01 which is now service to user session.

63. Re-Testing the restored applications
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12. The Load Balancer from “web01” detected the “app01” is in unhealthy state.
tail -f /sun/webserver7/https-web01/logs/errors

64. Re-Testing the restored applications
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13. Click “Refresh Page” 14. Fail Over to “app02”. Success

65. Re-Testing the restored applications
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15. Start all instances to be in normal state.

66. Re-Testing the restored applications
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16. Monitor the Load Balancer Health Check at web01 machine /sun/webserver7/https-web01/logs/errors
The LB detected
that app01 is in
a healthy state

67. Reviewing Stop All Servers Order
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1. Stop Web Server 2. Stop node agent and app02 3. Stop node agent and DAS at app01

68. 68
Danairat T.
Line ID: Danairat
FB: Danairat Thanabodithammachari
+668-1559-1446
Thank you