Cannot mount GFS2 filesystem on Raspberry Pi with DRBD

I've been trying to setup a pair of Raspberry Pis with DRBD+GFS2, in a dual-primary configuration.

I've successfully got working:

all packages installed

DRBD userland packages built from source and working

the 2 systems syncing an r0 device on /dev/drbd0

At this point I am having issues with getting the /dev/drbd0 device to mount on my /data dir. I get the error:

# mount -t gfs2 -o noatime,nodiratime,noquota /dev/drbd0 /data

mount: mount(2) failed: /data: No such file or directory

When I check my dmesg, I can see an error related to the lock_dlm protocol:

# dmesg | grep gfs

[159886.958163] gfs2: GFS2 installed

[159886.973908] gfs2: can't find protocol lock_dlm

[159925.272982] gfs2: can't find protocol lock_dlm

[160108.204231] gfs2: can't find protocol lock_dlm

[160139.555143] gfs2: can't find protocol lock_dlm

[161752.501161] gfs2: can't find protocol lock_dlm

The lock_dlm protocol is default when formatting GFS2:

mkfs.gfs2 -p lock_dlm -j 2 -t nfs:export /dev/drbd0

I've been doing some research on this, and as far as I can tell, the latest Rasbian kernel on the Raspberry Pi I'm using should support this and have the options enabled, notably CONFIG_GFS2_FS_LOCKING_DLM.

I'm having trouble verifying this, I'm not sure where to check.

I am not using custom compiled a kernel at this moment.

Can anyone advise how I can troubleshoot this?

asked Jan 13 at 17:04

Kareem

637

I’m not familiar with GFS2, but I found a module called dlm that’s not automatically loaded with gfs2. Maybe that’s required somehow?

– Daniel B
Jan 13 at 17:38

I found that there is a package called dlm-controld but I cannot find on the Pis I've setup any package called dlm. It's also not listed on the debian package dependency list: packages.debian.org/jessie/gfs2-utils Any idea what this dlm package might mean? I'm trying to work this out, but I think it has something to do with kernel support.

– Kareem
Jan 13 at 19:30

I’m not referring to a package but a kernel module, present in /lib/modules on Raspbian. You can load it using modprobe.

– Daniel B
Jan 13 at 19:33

I spent some time working on it, and got DLM running, but experienced the same issue. I managed to get everything working (Pacemaker, DLM, Corosync). When I try to mount, I noticed that in the dmesg the error still [ 3995.934192] gfs2: can't find protocol lock_dlm. Using journalctl I found another message raspberrypi4.local.lan kernel: gfs2: can't find protocol lock_dlm. Seems that it might still be a kernel issue that I need to track down and verify. If anyone knows anything about how to verify, I would appreciate any help.

– Kareem
Jan 14 at 4:10

Turns out, its almost definitely something to do with CONFIG_GFS2_FS_LOCKING_DLM I found a question at stackexchange that solved the same issue by recompiling the kernel: unix.stackexchange.com/questions/439311/… However, they failed to provide any details of how they did this smoothly. I have tried, and its been quite frustrating. If anyone knows how I can move forward with this, I'd really appreciate the help. :)

– Kareem
Jan 18 at 15:46

add a comment |

I've been trying to setup a pair of Raspberry Pis with DRBD+GFS2, in a dual-primary configuration.

I've successfully got working:

all packages installed

DRBD userland packages built from source and working

the 2 systems syncing an r0 device on /dev/drbd0

At this point I am having issues with getting the /dev/drbd0 device to mount on my /data dir. I get the error:

# mount -t gfs2 -o noatime,nodiratime,noquota /dev/drbd0 /data

mount: mount(2) failed: /data: No such file or directory

When I check my dmesg, I can see an error related to the lock_dlm protocol:

# dmesg | grep gfs

[159886.958163] gfs2: GFS2 installed

[159886.973908] gfs2: can't find protocol lock_dlm

[159925.272982] gfs2: can't find protocol lock_dlm

[160108.204231] gfs2: can't find protocol lock_dlm

[160139.555143] gfs2: can't find protocol lock_dlm

[161752.501161] gfs2: can't find protocol lock_dlm

The lock_dlm protocol is default when formatting GFS2:

mkfs.gfs2 -p lock_dlm -j 2 -t nfs:export /dev/drbd0

I'm having trouble verifying this, I'm not sure where to check.

I am not using custom compiled a kernel at this moment.

Can anyone advise how I can troubleshoot this?

asked Jan 13 at 17:04

Kareem

637

I’m not familiar with GFS2, but I found a module called dlm that’s not automatically loaded with gfs2. Maybe that’s required somehow?

– Daniel B
Jan 13 at 17:38

I found that there is a package called dlm-controld but I cannot find on the Pis I've setup any package called dlm. It's also not listed on the debian package dependency list: packages.debian.org/jessie/gfs2-utils Any idea what this dlm package might mean? I'm trying to work this out, but I think it has something to do with kernel support.

– Kareem
Jan 13 at 19:30

I’m not referring to a package but a kernel module, present in /lib/modules on Raspbian. You can load it using modprobe.

– Daniel B
Jan 13 at 19:33

I spent some time working on it, and got DLM running, but experienced the same issue. I managed to get everything working (Pacemaker, DLM, Corosync). When I try to mount, I noticed that in the dmesg the error still [ 3995.934192] gfs2: can't find protocol lock_dlm. Using journalctl I found another message raspberrypi4.local.lan kernel: gfs2: can't find protocol lock_dlm. Seems that it might still be a kernel issue that I need to track down and verify. If anyone knows anything about how to verify, I would appreciate any help.

– Kareem
Jan 14 at 4:10

Turns out, its almost definitely something to do with CONFIG_GFS2_FS_LOCKING_DLM I found a question at stackexchange that solved the same issue by recompiling the kernel: unix.stackexchange.com/questions/439311/… However, they failed to provide any details of how they did this smoothly. I have tried, and its been quite frustrating. If anyone knows how I can move forward with this, I'd really appreciate the help. :)

– Kareem
Jan 18 at 15:46

add a comment |

I've been trying to setup a pair of Raspberry Pis with DRBD+GFS2, in a dual-primary configuration.

I've successfully got working:

all packages installed

DRBD userland packages built from source and working

the 2 systems syncing an r0 device on /dev/drbd0

At this point I am having issues with getting the /dev/drbd0 device to mount on my /data dir. I get the error:

# mount -t gfs2 -o noatime,nodiratime,noquota /dev/drbd0 /data

mount: mount(2) failed: /data: No such file or directory

When I check my dmesg, I can see an error related to the lock_dlm protocol:

# dmesg | grep gfs

[159886.958163] gfs2: GFS2 installed

[159886.973908] gfs2: can't find protocol lock_dlm

[159925.272982] gfs2: can't find protocol lock_dlm

[160108.204231] gfs2: can't find protocol lock_dlm

[160139.555143] gfs2: can't find protocol lock_dlm

[161752.501161] gfs2: can't find protocol lock_dlm

The lock_dlm protocol is default when formatting GFS2:

mkfs.gfs2 -p lock_dlm -j 2 -t nfs:export /dev/drbd0

I'm having trouble verifying this, I'm not sure where to check.

I am not using custom compiled a kernel at this moment.

Can anyone advise how I can troubleshoot this?

asked Jan 13 at 17:04

Kareem

637

I've been trying to setup a pair of Raspberry Pis with DRBD+GFS2, in a dual-primary configuration.

I've successfully got working:

all packages installed

DRBD userland packages built from source and working

the 2 systems syncing an r0 device on /dev/drbd0

At this point I am having issues with getting the /dev/drbd0 device to mount on my /data dir. I get the error:

# mount -t gfs2 -o noatime,nodiratime,noquota /dev/drbd0 /data

mount: mount(2) failed: /data: No such file or directory

When I check my dmesg, I can see an error related to the lock_dlm protocol:

# dmesg | grep gfs

[159886.958163] gfs2: GFS2 installed

[159886.973908] gfs2: can't find protocol lock_dlm

[159925.272982] gfs2: can't find protocol lock_dlm

[160108.204231] gfs2: can't find protocol lock_dlm

[160139.555143] gfs2: can't find protocol lock_dlm

[161752.501161] gfs2: can't find protocol lock_dlm

The lock_dlm protocol is default when formatting GFS2:

mkfs.gfs2 -p lock_dlm -j 2 -t nfs:export /dev/drbd0

I'm having trouble verifying this, I'm not sure where to check.

I am not using custom compiled a kernel at this moment.

Can anyone advise how I can troubleshoot this?

nas raspberry-pi storage raspbian

asked Jan 13 at 17:04

Kareem

637

asked Jan 13 at 17:04

Kareem

637

asked Jan 13 at 17:04

Kareem

637

asked Jan 13 at 17:04

Kareem

637

asked Jan 13 at 17:04

Kareem

637

I’m not familiar with GFS2, but I found a module called dlm that’s not automatically loaded with gfs2. Maybe that’s required somehow?

– Daniel B
Jan 13 at 17:38

I found that there is a package called dlm-controld but I cannot find on the Pis I've setup any package called dlm. It's also not listed on the debian package dependency list: packages.debian.org/jessie/gfs2-utils Any idea what this dlm package might mean? I'm trying to work this out, but I think it has something to do with kernel support.

– Kareem
Jan 13 at 19:30

I’m not referring to a package but a kernel module, present in /lib/modules on Raspbian. You can load it using modprobe.

– Daniel B
Jan 13 at 19:33

I spent some time working on it, and got DLM running, but experienced the same issue. I managed to get everything working (Pacemaker, DLM, Corosync). When I try to mount, I noticed that in the dmesg the error still [ 3995.934192] gfs2: can't find protocol lock_dlm. Using journalctl I found another message raspberrypi4.local.lan kernel: gfs2: can't find protocol lock_dlm. Seems that it might still be a kernel issue that I need to track down and verify. If anyone knows anything about how to verify, I would appreciate any help.

– Kareem
Jan 14 at 4:10

Turns out, its almost definitely something to do with CONFIG_GFS2_FS_LOCKING_DLM I found a question at stackexchange that solved the same issue by recompiling the kernel: unix.stackexchange.com/questions/439311/… However, they failed to provide any details of how they did this smoothly. I have tried, and its been quite frustrating. If anyone knows how I can move forward with this, I'd really appreciate the help. :)

– Kareem
Jan 18 at 15:46

add a comment |

I’m not familiar with GFS2, but I found a module called dlm that’s not automatically loaded with gfs2. Maybe that’s required somehow?

– Daniel B
Jan 13 at 17:38

I found that there is a package called dlm-controld but I cannot find on the Pis I've setup any package called dlm. It's also not listed on the debian package dependency list: packages.debian.org/jessie/gfs2-utils Any idea what this dlm package might mean? I'm trying to work this out, but I think it has something to do with kernel support.

– Kareem
Jan 13 at 19:30

I’m not referring to a package but a kernel module, present in /lib/modules on Raspbian. You can load it using modprobe.

– Daniel B
Jan 13 at 19:33

I spent some time working on it, and got DLM running, but experienced the same issue. I managed to get everything working (Pacemaker, DLM, Corosync). When I try to mount, I noticed that in the dmesg the error still [ 3995.934192] gfs2: can't find protocol lock_dlm. Using journalctl I found another message raspberrypi4.local.lan kernel: gfs2: can't find protocol lock_dlm. Seems that it might still be a kernel issue that I need to track down and verify. If anyone knows anything about how to verify, I would appreciate any help.

– Kareem
Jan 14 at 4:10

Turns out, its almost definitely something to do with CONFIG_GFS2_FS_LOCKING_DLM I found a question at stackexchange that solved the same issue by recompiling the kernel: unix.stackexchange.com/questions/439311/… However, they failed to provide any details of how they did this smoothly. I have tried, and its been quite frustrating. If anyone knows how I can move forward with this, I'd really appreciate the help. :)

– Kareem
Jan 18 at 15:46

I’m not familiar with GFS2, but I found a module called dlm that’s not automatically loaded with gfs2. Maybe that’s required somehow?

– Daniel B
Jan 13 at 17:38

I found that there is a package called dlm-controld but I cannot find on the Pis I've setup any package called dlm. It's also not listed on the debian package dependency list: packages.debian.org/jessie/gfs2-utils Any idea what this dlm package might mean? I'm trying to work this out, but I think it has something to do with kernel support.

– Kareem
Jan 13 at 19:30

I’m not referring to a package but a kernel module, present in /lib/modules on Raspbian. You can load it using modprobe.

– Daniel B
Jan 13 at 19:33

I spent some time working on it, and got DLM running, but experienced the same issue. I managed to get everything working (Pacemaker, DLM, Corosync). When I try to mount, I noticed that in the dmesg the error still [ 3995.934192] gfs2: can't find protocol lock_dlm. Using journalctl I found another message raspberrypi4.local.lan kernel: gfs2: can't find protocol lock_dlm. Seems that it might still be a kernel issue that I need to track down and verify. If anyone knows anything about how to verify, I would appreciate any help.

– Kareem
Jan 14 at 4:10

Turns out, its almost definitely something to do with CONFIG_GFS2_FS_LOCKING_DLM I found a question at stackexchange that solved the same issue by recompiling the kernel: unix.stackexchange.com/questions/439311/… However, they failed to provide any details of how they did this smoothly. I have tried, and its been quite frustrating. If anyone knows how I can move forward with this, I'd really appreciate the help. :)

– Kareem
Jan 18 at 15:46

add a comment |

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