Re: DRBD failover issue, kernal panic no init found

Roger, 

Its drbd-ssi-1.2.2-20050712. It seems like as soon as the master goes
down, the slave does not resort to using its own copy. I don't see any
EXT3 FSCK messages like I've seen by searching the list for successful
fail over messages. The error is most certainly it can't find /sbin/init
probably because once the connection to the master dies, its not
properly using its 'own' copy.

I'm wondering if this is related to the Debian /dev/drbd0 vs /dev/drbd/0
issue that I've read about. I noticed you said you ran into this problem
on FC2, which is what RHEL3 is based on. Where you using OpenSSI 1.2.x
or 1.9.x and which version of DRBD?

Thanks.

/vijay

On Thu, 2006-07-06 at 22:50 -0400, Roger Tsang wrote:
> Are you using drbd-ssi (openSSI modified drbd) and have enabled
> SSI-failover service?
> 
> If you like to try the latest drbd-ssi I'll be making a drbd-ssi
> tarball based on drbd-0.7.20, hopefully sometime this week.
> 
> Roger
> 
> 
> On 7/6/06, Vijay Swami <[email protected]> wrote:
> > Pertinent details:
> >  * 2 node cluster
> >  * RHEL3
> >  * Kernel/OpenSSI ver: 2.4.21-27.0.2.EL_ssi_2 (install from RPM)
> >  * drbd version 0.7.11 (api:77)
> >  * SunFire X4100 2 CPU AMD Opteron hardware
> >
> > drbd.conf snippet:
> >
> >  on host1 {
> >     device     /dev/drbd/0;
> >     disk       /dev/sda2;
> >     nodenum    1;
> >     address    192.168.1.1:7788;
> >     meta-disk  /dev/sda3[0];
> >
> >
> >   on host2 {
> >     device    /dev/drbd/0;
> >     disk      /dev/sda2;
> >     nodenum   2;
> >     address   192.168.1.2:7788;
> >     meta-disk /dev/sda3[0];
> >
> > /etc/fstab:
> >
> > /dev/drbd/0 / ext3 defaults,chard,errors=remount-ro,node=1:2 0 1
> > /dev/sda1 /boot ext3 defaults,node=1:2 1 2
> > none    /dev/pts        devpts  gid=5,mode=620,node=*   0       0
> > none    /proc   proc    defaults,node=* 0       0
> > #none                    /dev/shm                tmpfs   defaults
> > 0 0
> >
> > df output:
> >
> > Filesystem           1K-blocks      Used Available Use% Mounted on
> > /dev/1/drbd/0         10080520   2329744   7238708  25% /
> > /dev/1/sda1             248895     61612    174433  27% /boot
> >
> > The root file system is configured with DRBD, and working great. Each
> > node can act as an init node when booted up individually. The other node
> > joins the cluster, and things work great.
> >
> > However, I'm having trouble with the failover.
> >
> > If I 'unplug' the master node, the slave recognizes the master has gone
> > down, and attempts to take over. It prints DRBD timeout messages to the
> > console (as expected), then:
> >
> > ipcnameserver ready
> > Kernel Panic: no init found. Cannot restart
> >
> > .. and then it reboots.
> >
> > I have a feeling its something fairly simple here, as DRBD itself works
> > fine when the nodes are booted. I'm assuming its looking for /sbin/init
> > to start on the slave node but can't find it? I don't know why since
> > DRBD itself works on either node acting as an init node when they are
> > booted regardless of sequence.
> >
> > Any ideas?
> >
> > Thanks.
> >
> > /vijay
> >
> > Using Tomcat but need to do more? Need to support web services, security?
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> > _______________________________________________
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> >
> 

Using Tomcat but need to do more? Need to support web services, security?
Get stuff done quickly with pre-integrated technology to make your job easier
Download IBM WebSphere Application Server v.1.0.1 based on Apache Geronimo
http://sel.as-us.falkag.net/sel?cmd=lnk&kid=120709&bid=263057&dat=121642