Greyhole troubleshooting

Gathering Good Troubleshooting Information when reporting an issue with Greyhole, or asking for help regarding Greyhole. You should provide the following (execute the given commands as root).

1. What version of Fedora, Samba & Greyhole are you running?

bash code
​uname -r; rpm -q samba hda-greyhole​

2. The content of the /etc/samba/smb.conf & /etc/greyhole.conf files (provide paste URLs):

Fedora:

bash code
​yum -y install fpaste; fpaste /etc/samba/smb.conf; fpaste /etc/greyhole.conf​

Ubuntu:

bash code
​patebinit /etc/samba/smb.conf; patebinit /etc/greyhole.conf​

3. The result of the following commands:

bash code
​mount; fdisk -l; df -h; greyhole --stats​

4. The list drives in your storage pool (per Amahi platform):

bash code
​mysql -u root -phda -e "select * from disk_pool_partitions" hda_production​

5. A list of the directories on the root of the drives included in your storage pool, obtained with the following command (provide a paste URL):

bash code
​mysql -u root -phda -e "select concat(path, '/gh') from disk_pool_partitions" hda_production | grep -v 'concat(' | xargs ls -la | fpaste​

6. The Greyhole work queue:

bash code
​greyhole --view-queue​

If the above command returns nothing, execute the following to see the problem:

bash code
​tail /var/log/greyhole.log​

7. If you have issues with a particular file (file disappeared, is wrong size, has wrong filename), execute the following to find out what Greyhole did with this file:

bash code
​greyhole --debug filename​

Clearing The Greyhole Work Queue

I've not seen too many other reports of this occuring on the internet, so I suspect it's something that may be specific to my setup. However, the fix is pretty general, so I'm documenting it here for others to use.

Sometimes, greyhole will have too many tasks queued, and will lock up, leaving you with a full landing zone and an fsck queue that just isn't processing. Always leave your server overnight (or longer, depending on the size of your landing zone (overnight should be sufficient for most) to ensure that its not just taking a while to process, but if its really, definitely stuck, you may want to follow these instructions to clear the queue.

Stop the greyhole daemon

bash code
​sudo service greyhole stop​

Connect to the MYSQL engine

bash code
​mysql -u greyhole -pgreyhole​

Select the Greyhole database

bash code
​USE greyhole;​

Drop and Recreate the 'Tasks' table with the same structure

bash code
​TRUNCATE TABLE tasks;​

Exit the MYSQL engine

bash code
​exit;​

Restart the greyhole daemon

bash code
​sudo service greyhole start​

Schedule an fsck to clear out the files currently in the landing zone

bash code
​sudo greyhole --fsck​

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