6.4 Testing

From SambaWiki
Jump to: navigation, search

1.0: Configuring Samba

2.0: Configuring LDAP

3.0: Initialization LDAP Database

4.0: User Management

5.0: Heartbeat HA Configuration

6.0: DRBD

7.0: BIND DNS



Table of Contents

6.1 Requirements

6.2 Installation

6.3 Configuration

6.3.1 drbd.conf

6.3.2 Initialization

6.4 Testing


We have a 2 node cluster replicating data, its time to test a failover.


Step1

Start the heartbeat service on both nodes.


Step2

On node1 we can see the status of DRBD.

[root@node1 ~]# service drbd status
drbd driver loaded OK; device status:
version: 0.7.23 (api:79/proto:74)
0: cs:Connected st:Primary/Secondary ld:Consistent
   ns:1536 nr:0 dw:1372 dr:801 al:4 bm:6 lo:0 pe:0 ua:0 ap:0
[root@node1 ~]#

On node2 we can see the status of DRBD.

[root@node2 ~]# service drbd status
drbd driver loaded OK; device status:
version: 0.7.23 (api:79/proto:74)
SVN Revision: 2686 build by root@node2, 2007-01-23 20:26:03
0: cs:Connected st:Secondary/Primary ld:Consistent
   ns:0 nr:1484 dw:1484 dr:0 al:0 bm:6 lo:0 pe:0 ua:0 ap:0
[root@node2 ~]#

That all looks good; we can see the devices are consistent and ready for use.


Step3

Now let’s check the mount point we created in the heartbeat haresources file.

We can see heartbeat has successfully mounted “/dev/drbd0 to the /data directory” of course your device will not have any data on it yet.

[root@node1 ~]# df -h
Filesystem            Size  Used Avail Use% Mounted on
/dev/mapper/VolGroup00-LogVol00
                      35G   14G   20G  41% /
/dev/hdc1              99M   21M   74M  22% /boot
/dev/shm              506M     0  506M   0% /dev/shm
/dev/drbd0             74G   37G   33G  53% /data
[root@node1 ~]#


Step4

Login to node1 and execute the following command; once heartbeat is stopped it should only take a few seconds to migrate the services to node2.


[root@node1 ~]# service heartbeat stop
Stopping High-Availability services:
                                         [  OK  ]

[root@node1 ~]# service drbd status
drbd driver loaded OK; device status:
version: 0.7.23 (api:79/proto:74)
SVN Revision: 2686 build by root@node1, 2007-01-23 20:26:13
0: cs:Connected st:Secondary/Primary ld:Consistent
   ns:5616 nr:85492 dw:90944 dr:2162 al:9 bm:260 lo:0 pe:0 ua:0 ap:0

We can see drbd change state to secondary on node1.


Step5

Now let’s check that status of DRBD on node2; we can see it has changed state and become the primary.

[root@node2 ~]# service drbd status
drbd driver loaded OK; device status:
version: 0.7.23 (api:79/proto:74)
 SVN Revision: 2686 build by root@node2, 2007-01-23 20:26:03
0: cs:Connected st:Primary/Secondary ld:Consistent
   ns:4 nr:518132 dw:518136 dr:17 al:0 bm:220 lo:0 pe:0 ua:0 ap:0
1: cs:Connected st:Primary/Secondary ld:Consistent
   ns:28 nr:520252 dw:520280 dr:85 al:0 bm:199 lo:0 pe:0 ua:0 ap:0

Check that node2 has mounted the device.

[root@node2 ~]# df -h
Filesystem            Size  Used Avail Use% Mounted on
/dev/mapper/VolGroup00-LogVol00
                      35G   12G   22G  35% /
/dev/hdc1              99M   17M   78M  18% /boot
/dev/shm              506M     0  506M   0% /dev/shm
/dev/hdh1             111G   97G  7.6G  93% /storage
/dev/drbd0             74G   37G   33G  53% /data
[root@node2 ~]#


Step5

Finally start the heartbeat service on node1 and be sure that all processes migrate back.