Hi,
I have a problem, which (from what I found) has been discussed, however not in the particular case, which I experienced, so I would be grateful for any suggestions of how to deal with it. I. 1. I get an error when demoting DRBD resource: * drbdadm down data0 data0: State change failed: (-12) Device is held open by someone additional info from kernel: failed to demote Command 'drbdsetup-84 down data0' terminated with exit code 11 2. The device is not mounted and not used by any LVM, so based on some online discussions I checked the blocking process and it is "drbd0_submit" * lsof | grep drbd0 drbd0_sub 16687 root cwd DIR 202,1 251 64 / drbd0_sub 16687 root rtd DIR 202,1 251 64 / drbd0_sub 16687 root txt unknown /proc/16687/exe * ps auxf root 16687 0.0 0.0 0 0 ? S< 15:19 0:00 \_ [drbd0_submit] Is there a good way to deal with this case, as whether some DRBD step is missing, which leaves the process or killing the process is the right way? Thanks in advance, II. Some details: 1) [root@ip-10-29-97-230 ~]# lsblk xvdb 202:16 0 10G 0 disk └─md0 9:0 0 20G 0 raid0 ├─md0p1 259:0 0 9.9G 0 md │ └─drbd0 147:0 0 9.9G 0 disk └─md0p2 259:1 0 10.1G 0 md xvdc 202:32 0 10G 0 disk └─md0 9:0 0 20G 0 raid0 ├─md0p1 259:0 0 9.9G 0 md │ └─drbd0 147:0 0 9.9G 0 disk └─md0p2 259:1 0 10.1G 0 md 2) [root@ip-10-29-97-230 ~]# drbd-overview NOTE: drbd-overview will be deprecated soon. Please consider using drbdtop. 0:data0/0 WFConnection Primary/Unknown UpToDate/DUnknown 1:data1/0 Unconfigured . [root@ip-10-29-101-160 ~]# drbd-overview NOTE: drbd-overview will be deprecated soon. Please consider using drbdtop. 0:data0/0 Unconfigured . . 1:data1/0 Unconfigured . . 3) [root@ip-10-29-97-230 ~]# drbdadm dump data0 # resource data0 on ip-10-29-97-230.ec2.internal: not ignored, not stacked # defined at /etc/drbd.d/data0.res:55 resource data0 { on ip-10-29-97-230.ec2.internal { device /dev/drbd0 minor 0; disk /dev/md0p1; meta-disk internal; address ipv4 10.29.97.230:7789; } on ip-10-29-101-160.ec2.internal { device /dev/drbd0 minor 0; disk /dev/md0p2; meta-disk internal; address ipv4 10.29.101.160:7790; } options { cpu-mask 0; on-no-data-accessible io-error; } net { protocol C; sndbuf-size 0; rcvbuf-size 0; max-buffers 2048; max-epoch-size 2048; unplug-watermark 128; use-rle yes; tcp-cork yes; verify-alg ""; connect-int 10; ping-int 10; ping-timeout 8; timeout 60; } disk { on-io-error call-local-io-error; resync-rate 1000M; c-plan-ahead 0; c-fill-target 1M; c-delay-target 1; c-min-rate 0; c-max-rate 1000M; disk-barrier no; disk-flushes yes; disk-drain yes; al-extents 1237; read-balancing prefer-local; md-flushes yes; max-bio-bvecs 0; } startup { become-primary-on ip-10-29-97-230.ec2.internal; } } -- Best Regards, Radoslaw Garbacz XtremeData Incorporated
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