Note: "permalinks" may not be as permanent as we would like,
direct links of old sources may well be a few messages off.
On Oct 9, 2008, at 8:37 AM, Timh Bergström wrote: > 2008/10/9 kevin kempter <kevin at kevinkempterllc.com>: >> >> On Oct 8, 2008, at 3:36 PM, Florian Haas wrote: >> >>> On 10/08/2008 11:04 PM, Jerry Amundson wrote: >>>> >>>> On Wed, Oct 8, 2008 at 3:33 PM, kevin kempter <kevin at kevinkempterllc.com >>>> > >>>> wrote: >>>>> >>>>> 1) I setup 2 new installs of CentOS v5 (32bit) as VM's via >>>>> vmware server >>>>> on >>>>> a Dell 2900 (quad core, 16Gram, single RAID slice, etc) >>>>> >>>>> Note: I created /stage as a separate ext2 filesystem (mounted from >>>>> /dev/sda2). This is the filesystem I want to replicate with drbd >>>> >>>> That will need to be re-made on the drbd device. >>> >>> Wrong. If you shrink the filesystem (resize2fs) to make room for >>> DRBD's >>> metadata, you will be able to replicate the existing data without >>> remaking the filesystem. If you need to keep that data. >>> >>> After you have shrunk your filesystem (shrink by 128M to be on the >>> safe >>> side), you want to do exactly what your original error message >>> told you, >>> namely use "drbdadm create-md <resource>" to create your metadata. >>> >>> Btw: ext2, being a non-journaling filesystem, is a really bad >>> choice for >>> HA environments. Use ext3. >>> >>> Florian >>> >>> -- >>> : Florian G. Haas >>> : LINBIT Information Technologies GmbH >>> : Vivenotgasse 48, A-1120 Vienna, Austria >>> >>> When replying, there is no need to CC my personal address. >>> I monitor the list on a daily basis. Thank you. >>> >>> LINBIT(R) and DRBD(R) are registered trademarks of LINBIT. >>> _______________________________________________ >>> drbd-user mailing list >>> drbd-user at lists.linbit.com >>> http://lists.linbit.com/mailman/listinfo/drbd-user >> >> >> Hi All; >> >> I'm finding no luck with anything I've tried. So I've decided to go >> back to >> ground zero and walk through a proper setup. A few questions: >> >> I've setup 2 brand new CentOS 5 VM's (via vmware server). I'm >> wanting to use >> internal meta-data to keep things simple. >> >> How do I need to prepare the disk ? this far I've created a partition >> (/drbd_data) as an ext3 filesystem as part of the initial disk >> partitioning >> (in the CentOS install) on both servers. Is this correct? > > Why? If you do not already have any data that you want to preserve in > this space, just dont create a filesystem on it at all, do that when > drbd is set up and started. > Since I already created it, do I need to use fdisk and remove it? >> >> Also, do I need to unmount these /drbd_data file systems before >> attempting >> to startup drbd ? > > It should not be mounted as it should not contain a filesystem, see > above. > >> >> >> Next steps: >> 1) install the drbd RPM's on both servers >> >> 2) modprobe drbd (on both servers) >> >> 3) create the /etc/drbd.conf file on both servers >> >> 4) run drbdadm create-md 'resource' on the master node >> >> 5) run drbdadm attach 'resource' on the master node > > After this step, you should create the filesystem on the DRBD resource > (ie. mkfs.ext3 (read manual for options) /dev/drbd1) not /dev/sda2. > Then connect it - then mount the DRBD-resource. And you only have to > create the filesystem on the master node, which will be replicated to > the slave-node with drbd. > In the drbd.conf file the on resource entries (in the samples) show device and disk entries that are both /dev/xx I'm confused on the difference. If I create an ext3 fs at /dev/sda2 how do I associate this device with something like /dev/drbd1 ? Is /dev/drbd1 simply the mount point ? >> >> 6) run drbdadm connect 'resource' on the master >> >> >> Previously when I tried to run step 4 I got error messages, trying >> to use a >> minimal config using internal meta data >> >> Does the above sound correct ? Am I missing anything ? >> >> Thanks in advance >> >> >> _______________________________________________ >> drbd-user mailing list >> drbd-user at lists.linbit.com >> http://lists.linbit.com/mailman/listinfo/drbd-user >> > > > > -- > Timh Bergström > System Administrator > Diino AB - www.diino.com > :wq