[Linux-HA] HIGH AVAILABILITY SAMBA CLUSTER (updated mail)

[Vijay Alexander]

Hello everyone,

This is my latest update to the high availability samba cluster mail which I had sent previously. I have included the basic details in case you have missed the first mail.
  
E N V I R O N M E N T _ D E T A I L S

Primary server
Server name: test02
IP address: 192.168.50.152
Subnet mask: 255.255.255.0
OS: CentOS 4.3 (Kernel version: 2.6.9-34.EL)

Applications installed: DRBD version 0.7.9, Heartbeat version 2.0.7, SAMBA version 3.0.10-1.4E.6

Secondary server
Server name: test01
IP address: 192.168.50.151
Subnet mask: 255.255.255.0
OS: CentOS 4.3 (Kernel version: 2.6.9-34.EL)

Applications installed: DRBD version 0.7.9, Heartbeat version 2.0.7, SAMBA version 3.0.10-1.4E.6

Client system
System name: test03
IP address: 192.168.50.153
OS: Windows XP Professional sp2

SAMBA is serviced on the IP address 192.168.50.195

Configuration files are as follows:

drbd.conf (test01/test02)

resource r0
{

protocol C;
#incon-degr-cmd "halt -f";

startup 
{
degr-wfc-timeout 120; # 2 minutes
}

disk
{
on-io-error detach;
}

net
{

}

syncer
{
rate 10M;
group 1;
al-extents 257;
}

on test01
{
device /dev/drbd0;
disk /dev/hda5;
address 192.168.50.151:7789;
meta-disk internal;
}

on test02
{
device /dev/drbd0;
disk /dev/hda5;
address 192.168.50.152:7789;
meta-disk internal;
}
}
  
ha.cf (test01/test02)

logfacility local0
logfile /var/log/ha-log
debug 1
bcast eth0
keepalive 2
deadtime 10
initdead 30
auto_failback off
node test01
node test02
ping test01
ping test02
#respawn hacluster /user/lib/heartbeat/ipfail

haresources (test01/test02)
test02 IPaddr::192.168.50.195/24/eth0 drbddisk::r0 Filesystem::/dev/drbd0 smb
   
  authkeys (test01/test02)
auth 3
3 md5 goose

smb.conf (test01)
[global]
workgroup = Workgroup
server string = SAMBA_TEST
admin users = root
share modes = yes
browseable = yes
username map = /etc/samba/smbusers
interfaces = 192.168.50.195

[goose01]
path = /mnt/goose01
writeable = yes
guest ok = yes

smb.conf (test02)
[global]
workgroup = Workgroup
server string = SAMBA_TEST
admin users = root
share modes = yes
browseable = yes
username map = /etc/samba/smbusers
interfaces = 192.168.50.195

[goose02]
path = /mnt/goose02
writeable = yes
guest ok = yes

smbusers (test01/test02)
# Unix_name = SMB_name1 SMB_name2 ...
# root = administrator admin
# nobody = guest pcguest smbguest
root = root

P R O B L E M

While client test03 attempts to access SAMBA services on 192.168.50.195, the primary server reboots.

T R O U B L E S H O O T I N G

The steps taken (to the point of failure) are as follows:

1. Started drbd on test02 (primary)
2. Started drbd on test01 (secondary)
3. Ran the command drbdadm primary all on test02
4. Ran the command mount /dev/drbd0 /mnt/goose02 on test02
5. Started samba on test02 (primary)
6. Created test files hello and world in the /mnt/goose02 share. (SAMBA was already configured with the /mnt/goose02 folder.)
7. I then try accessing it from the windows system using service IP address 192.168.50.195. If it does not crash, I can browse the files on 192.168.50.195 momentarily. Then the primary server reboots without warning.
8. After the primary server crashes, I ran the command drbdadm primary all on the secondary server, in order to mount the virtual block.
9. Then I ran the command mount dev/drbd0 /mnt/goose01 share on test01. (SAMBA was already configured with the /mnt/goose01 folder.)
10. Started the samba service on test01.
11. The files are accessible from the windows system on service IP 192.168.50.195

In order to get a new batch of log files, I cleared the files in /var/log. Started up drbd, heartbeat and samba on test01 and test02. While trying to access the samba files on service address 192.168.50.195, the primary server crashed out again. The fresh logs are included with this post. Kindly assist.


Regards,
Alex
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