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#REDIRECT [[DRBD]] |
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__NOTOC__ |
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= DRBD = |
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== How to setup DRBD with separated resource and meta-disk == |
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* On both servers* |
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* Create 2 separate partitions on each server, one for meta and one for data. Some meta-disk size approximations: |
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||'''Block device size'''||'''DRBD meta data'''|| |
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|| 1 GB || 2 MB || |
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|| 100 GB || 4+1 MB || |
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|| 500 GB || 16+2 MB || |
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|| 1 TB || 32+2 MB || |
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|| 2 TB || 64+1 MB || |
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|| 4 TB || 128 MB || |
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# If the meta-disk and resource partition are listed on fstab, then remove them from there |
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# Install drbd |
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<pre><nowiki> |
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# apt-get -y install drbd8-utils |
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</nowiki></pre> |
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# Edit `drbd.conf` to something similar to: |
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<pre><nowiki> |
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global { usage-count no; } |
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common { syncer { rate 100M; } } |
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resource srv { |
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protocol C; |
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startup { |
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wfc-timeout 15; |
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degr-wfc-timeout 60; |
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} |
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net { |
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cram-hmac-alg sha1; |
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shared-secret "B1ng0!"; |
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} |
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on SERVER-01p { |
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device /dev/drbd0; |
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disk /dev/md4; |
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address IP_SERVER-01p:7788; |
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meta-disk /dev/md3[0]; |
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} |
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on SERVER-01s { |
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device /dev/drbd0; |
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disk /dev/md4; |
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address IP_SERVER-01s:7788; |
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meta-disk /dev/md3[0]; |
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} |
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} |
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</nowiki></pre> |
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# Create resource and meta-disk |
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<pre><nowiki> |
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# drbdadm create-md srv |
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</nowiki></pre> |
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# Start DRBD |
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<pre><nowiki> |
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# service drbd start |
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</nowiki></pre> |
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* On primary* |
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When finish the previous setup on both servers |
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# Tell DRBD which one is the primary |
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<pre><nowiki> |
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# drbdadm -- --overwrite-data-of-peer primary all |
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</nowiki></pre> |
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This going to take a long, depending of the size of the drive. The sync can be watched at `/proc/drbd` file. |
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# When drbd sync is done, then, create the filesystem on drbd device |
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<pre><nowiki> |
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# mkfs.ext4 /dev/drbd0 |
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</nowiki></pre> |
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# Finally, mount drbd device on the primary server |
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<pre><nowiki> |
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# mount /dev/drbd0 /srv |
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</nowiki></pre> |
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Latest revision as of 05:30, 12 June 2015
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