Continuous Fog Storage Node Replication problem

MPSAdmin · Feb 19, 2018, 8:05 PM

Hi all! Let me first say how awesome Fog is and thank you for making it so amazing.

I am having an issue with replication between my primary FOG node (running centos 7) and a remote storage node, running on a synology system. I have followed the synology storage node guides and have everything set up at the remote site. It all works perfectly except that the main node continually replicates the image files to the secondary node. Not sure why. Any ideas?

Thanks!

Wayne Workman · Feb 19, 2018, 8:07 PM

@mpsadmin said in Continuous Fog Storage Node Replication problem:

Any ideas?

Check the space, maybe it’s running out? Also, you should check the master node’s replication log. It’s in here generally: /var/log/fog/

MPSAdmin · Feb 19, 2018, 2:13 PM

Here are the abbreviated contents of the fogreplicator.log:

[02-19-18 7:55:43 pm]  | Files do not match.
[02-19-18 7:55:43 pm]  * Deleting remote file: /images/dev/postinitscripts/fog.postinit
[02-19-18 7:55:43 pm]  * Starting Sync Actions
[02-19-18 7:55:43 pm]  | CMD:
			lftp -e 'set xfer:log 1; set xfer:log-file "/opt/fog/log/fogreplicator..transfer.spg-syn1.log";set ftp:list-options -a;set net:max-retries 10;set net:timeout 30; set net:limit-rate 0:13107200; mirror -c -r -R --ignore-time -vvv --exclude ".srvprivate" "/images/dev/postinitscripts" "/images/dev/postinitscripts"; exit' -u foguser,[Protected] 10.1.0.133
[02-19-18 7:55:43 pm]  * Started sync for Image dev/postinitscripts
[02-19-18 7:55:43 pm]  * Not syncing Image between groups
[02-19-18 7:55:43 pm]  | Image Name: G3-0118.1
[02-19-18 7:55:43 pm]  | There are no other members to sync to.
[02-19-18 7:55:43 pm]  * Attempting to perform Group -> Nodes image replication.
[02-19-18 7:55:43 pm]  * Found Image to transfer to 1 node
[02-19-18 7:55:43 pm]  | Image Name: G3-0118.1
[02-19-18 7:55:43 pm] | Replication already running with PID: 9840
[02-19-18 8:05:40 pm]  * Starting Image Replication.
[02-19-18 8:05:40 pm]  * We are group ID: 1. We are group name: default
[02-19-18 8:05:40 pm]  * We are node ID: 1. We are node name: DefaultMember
[02-19-18 8:05:40 pm]  * Attempting to perform Group -> Group image replication.
[02-19-18 8:05:40 pm]  | Replicating postdownloadscripts
[02-19-18 8:05:40 pm]  * Found Image to transfer to 1 node
[02-19-18 8:05:40 pm]  | File Name: postdownloadscripts
[02-19-18 8:05:41 pm]  | 235 235 /images/postdownloadscripts/fog.postdownload <!DOCTYPE html>

....(file contents here)....
[02-19-18 8:05:41 pm]  | Files do not match.
[02-19-18 8:05:41 pm]  * Deleting remote file: /images/postdownloadscripts/fog.postdownload
[02-19-18 8:05:42 pm]  * Starting Sync Actions
[02-19-18 8:05:42 pm]  | CMD:
			lftp -e 'set xfer:log 1; set xfer:log-file "/opt/fog/log/fogreplicator..transfer.spg-syn1.log";set ftp:list-options -a;set net:max-retries 10;set net:timeout 30; set net:limit-rate 0:13107200; mirror -c -r -R --ignore-time -vvv --exclude ".srvprivate" "/images/postdownloadscripts" "/images/postdownloadscripts"; exit' -u foguser,[Protected] 10.1.0.133
[02-19-18 8:05:42 pm]  * Started sync for Image postdownloadscripts
[02-19-18 8:05:42 pm]  | Replicating postinitscripts
[02-19-18 8:05:42 pm]  * Found Image to transfer to 1 node
[02-19-18 8:05:42 pm]  | File Name: dev/postinitscripts
[02-19-18 8:05:43 pm]  | 249 249 /images/dev/postinitscripts/fog.postinit <!DOCTYPE html>

....(file contents printed here)....

[02-19-18 8:05:43 pm]  | Files do not match.
[02-19-18 8:05:43 pm]  * Deleting remote file: /images/dev/postinitscripts/fog.postinit
[02-19-18 8:05:43 pm]  * Starting Sync Actions
[02-19-18 8:05:43 pm]  | CMD:
			lftp -e 'set xfer:log 1; set xfer:log-file "/opt/fog/log/fogreplicator..transfer.spg-syn1.log";set ftp:list-options -a;set net:max-retries 10;set net:timeout 30; set net:limit-rate 0:13107200; mirror -c -r -R --ignore-time -vvv --exclude ".srvprivate" "/images/dev/postinitscripts" "/images/dev/postinitscripts"; exit' -u foguser,[Protected] 10.1.0.133
[02-19-18 8:05:43 pm]  * Started sync for Image dev/postinitscripts
[02-19-18 8:05:43 pm]  * Not syncing Image between groups
[02-19-18 8:05:43 pm]  | Image Name: G3-0118.1
[02-19-18 8:05:43 pm]  | There are no other members to sync to.
[02-19-18 8:05:43 pm]  * Attempting to perform Group -> Nodes image replication.
[02-19-18 8:05:43 pm]  * Found Image to transfer to 1 node
[02-19-18 8:05:43 pm]  | Image Name: G3-0118.1
[02-19-18 8:05:43 pm] | Replication already running with PID: 9840

MPSAdmin · Feb 19, 2018, 8:13 PM

Thanks for the quick reply.
Plenty of space… (9TB free)

Wayne Workman · Feb 19, 2018, 2:15 PM

@mpsadmin So in the replication log, it should print the command the replicator is using for each of these replication activities.

You can stop the replicator like this generally:

systemctl stop FOGImageReplicator

And then try to manually run the command from the master node. See what happens as it runs. You will need to input the correct password in the command.

Later, you can turn replication back on like this:

systemctl start FOGImageReplicator

MPSAdmin · Feb 19, 2018, 8:19 PM

@wayne-workman
Also, the fogreplicator…transfer.(synologyname).log shows the following:
(edited for brevity…it just flips the same two files back and forth)

2018-02-19 13:55:42 /images/dev/postinitscripts/fog.postinit -> ftp://foguser@10.1.0.133/images/dev/postinitscripts/fog.postinit 0-249 24.3K/s
2018-02-19 14:05:42 /images/postdownloadscripts/fog.postdownload -> ftp://foguser@10.1.0.133/images/postdownloadscripts/fog.postdownload 0-235 17.7K/s
2018-02-19 14:05:44 /images/dev/postinitscripts/fog.postinit -> ftp://foguser@10.1.0.133/images/dev/postinitscripts/fog.postinit 0-249 4.4K/s
2018-02-19 14:15:42 /images/postdownloadscripts/fog.postdownload -> ftp://foguser@10.1.0.133/images/postdownloadscripts/fog.postdownload 0-235 19.1K/s
2018-02-19 14:15:43 /images/dev/postinitscripts/fog.postinit -> ftp://foguser@10.1.0.133/images/dev/postinitscripts/fog.postinit 0-249 8.1K/s
2018-02-19 14:25:42 /images/postdownloadscripts/fog.postdownload -> ftp://foguser@10.1.0.133/images/postdownloadscripts/fog.postdownload 0-235 3.6K/s
2018-02-19 14:25:43 /images/dev/postinitscripts/fog.postinit -> ftp://foguser@10.1.0.133/images/dev/postinitscripts/fog.postinit 0-249 24.3K/s
2018-02-19 14:35:42 /images/postdownloadscripts/fog.postdownload -> ftp://foguser@10.1.0.133/images/postdownloadscripts/fog.postdownload 0-235 5.7K/s
2018-02-19 14:35:44 /images/dev/postinitscripts/fog.postinit -> ftp://foguser@10.1.0.133/images/dev/postinitscripts/fog.postinit 0-249 4.6K/s
2018-02-19 14:45:43 /images/postdownloadscripts/fog.postdownload -> ftp://foguser@10.1.0.133/images/postdownloadscripts/fog.postdownload 0-235 5.5K/s
2018-02-19 14:45:43 /images/dev/postinitscripts/fog.postinit -> ftp://foguser@10.1.0.133/images/dev/postinitscripts/fog.postinit 0-249 24.3K/s
2018-02-19 14:55:42 /images/postdownloadscripts/fog.postdownload -> ftp://foguser@10.1.0.133/images/postdownloadscripts/fog.postdownload 0-235 5.1K/s
2018-02-19 14:55:44 /images/dev/postinitscripts/fog.postinit -> ftp://foguser@10.1.0.133/images/dev/postinitscripts/fog.postinit 0-249 4.2K/s
2018-02-19 15:05:43 /images/postdownloadscripts/fog.postdownload -> ftp://foguser@10.1.0.133/images/postdownloadscripts/fog.postdownload 0-235 2.8K/s
2018-02-19 15:05:44 /images/dev/postinitscripts/fog.postinit -> ftp://foguser@10.1.0.133/images/dev/postinitscripts/fog.postinit 0-249 24.3K/s

MPSAdmin · Feb 19, 2018, 8:22 PM

@wayne-workman
I know how to start/stop the service, thanks for that. The problem is that I can’t stop the service fast enough before it starts writing to one of the files again. It is literally continuous replication…over and over again. See below:

2018-02-19 12:35:11 /images/G3-0118.1/d1.fixed_size_partitions -> ftp://foguser@10.1.0.133/images/G3-0118.1/d1.fixed_size_partitions 0-5 156b/s
2018-02-19 12:35:11 /images/G3-0118.1/d1.mbr -> ftp://foguser@10.1.0.133/images/G3-0118.1/d1.mbr 0-1048576 15.15M/s
2018-02-19 12:35:11 /images/G3-0118.1/d1.minimum.partitions -> ftp://foguser@10.1.0.133/images/G3-0118.1/d1.minimum.partitions 0-330 6.7K/s
2018-02-19 12:35:12 /images/G3-0118.1/d1.original.fstypes -> ftp://foguser@10.1.0.133/images/G3-0118.1/d1.original.fstypes 0-40 1.9K/s
2018-02-19 12:35:12 /images/G3-0118.1/d1.original.swapuuids -> ftp://foguser@10.1.0.133/images/G3-0118.1/d1.original.swapuuids 0-0
2018-02-19 12:35:12 /images/G3-0118.1/d1.partitions -> ftp://foguser@10.1.0.133/images/G3-0118.1/d1.partitions 0-330 21.5K/s
2018-02-19 12:35:41 /images/G3-0118.1/d1.fixed_size_partitions -> ftp://foguser@10.1.0.133/images/G3-0118.1/d1.fixed_size_partitions 0-5 455b/s
2018-02-19 12:35:41 /images/G3-0118.1/d1.mbr -> ftp://foguser@10.1.0.133/images/G3-0118.1/d1.mbr 0-1048576 14.29M/s
2018-02-19 12:35:41 /images/G3-0118.1/d1.minimum.partitions -> ftp://foguser@10.1.0.133/images/G3-0118.1/d1.minimum.partitions 0-330 40.3K/s
2018-02-19 12:35:41 /images/G3-0118.1/d1.original.fstypes -> ftp://foguser@10.1.0.133/images/G3-0118.1/d1.original.fstypes 0-40 5.6K/s
2018-02-19 12:35:41 /images/G3-0118.1/d1.partitions -> ftp://foguser@10.1.0.133/images/G3-0118.1/d1.partitions 0-330 46.0K/s
2018-02-19 12:36:08 /images/G3-0118.1/d1p1.img -> ftp://foguser@10.1.0.133/images/G3-0118.1/d1p1.img 0-364722448 12.87M/s
2018-02-19 13:32:10 /images/G3-0118.1/d1p2.img -> ftp://foguser@10.1.0.133/images/G3-0118.1/d1p2.img 0-44072908270 12.50M/s
2018-02-19 13:48:51 /images/G3-0118.1/d1p3.img -> ftp://foguser@10.1.0.133/images/G3-0118.1/d1p3.img 0-13123585448 12.50M/s
2018-02-19 13:48:53 /images/G3-0118.1/d1p4.img -> ftp://foguser@10.1.0.133/images/G3-0118.1/d1p4.img 0-34532488 17.37M/s
2018-02-19 13:56:11 /images/G3-0118.1/d1.fixed_size_partitions -> ftp://foguser@10.1.0.133/images/G3-0118.1/d1.fixed_size_partitions 0-5 500b/s
2018-02-19 13:56:11 /images/G3-0118.1/d1.mbr -> ftp://foguser@10.1.0.133/images/G3-0118.1/d1.mbr 0-1048576 19.23M/s
2018-02-19 13:56:11 /images/G3-0118.1/d1.minimum.partitions -> ftp://foguser@10.1.0.133/images/G3-0118.1/d1.minimum.partitions 0-330 46.0K/s
2018-02-19 13:56:11 /images/G3-0118.1/d1.original.fstypes -> ftp://foguser@10.1.0.133/images/G3-0118.1/d1.original.fstypes 0-40 4.9K/s
2018-02-19 13:56:11 /images/G3-0118.1/d1.partitions -> ftp://foguser@10.1.0.133/images/G3-0118.1/d1.partitions 0-330 46.0K/s
2018-02-19 13:56:45 /images/G3-0118.1/d1p1.img -> ftp://foguser@10.1.0.133/images/G3-0118.1/d1p1.img 0-364722448 10.35M/s
2018-02-19 14:52:47 /images/G3-0118.1/d1p2.img -> ftp://foguser@10.1.0.133/images/G3-0118.1/d1p2.img 0-44072908270 12.50M/s
2018-02-19 15:09:28 /images/G3-0118.1/d1p3.img -> ftp://foguser@10.1.0.133/images/G3-0118.1/d1p3.img 0-13123585448 12.50M/s
2018-02-19 15:09:30 /images/G3-0118.1/d1p4.img -> ftp://foguser@10.1.0.133/images/G3-0118.1/d1p4.img 0-34532488 12.55M/s
2018-02-19 15:16:06 /images/G3-0118.1/d1.fixed_size_partitions -> ftp://foguser@10.1.0.133/images/G3-0118.1/d1.fixed_size_partitions 0-5 455b/s
2018-02-19 15:16:06 /images/G3-0118.1/d1.mbr -> ftp://foguser@10.1.0.133/images/G3-0118.1/d1.mbr 0-1048576 18.87M/s
2018-02-19 15:16:06 /images/G3-0118.1/d1.minimum.partitions -> ftp://foguser@10.1.0.133/images/G3-0118.1/d1.minimum.partitions 0-330 46.0K/s
2018-02-19 15:16:06 /images/G3-0118.1/d1.original.fstypes -> ftp://foguser@10.1.0.133/images/G3-0118.1/d1.original.fstypes 0-40 5.6K/s
2018-02-19 15:16:06 /images/G3-0118.1/d1.partitions -> ftp://foguser@10.1.0.133/images/G3-0118.1/d1.partitions 0-330 46.0K/s
2018-02-19 15:16:33 /images/G3-0118.1/d1p1.img -> ftp://foguser@10.1.0.133/images/G3-0118.1/d1p1.img 0-364722448 12.84M/s

Wayne Workman · Feb 19, 2018, 8:23 PM

@mpsadmin The idea was to stop the service - wait for all the replicators to stop - then try to execute the LFTP command manually so you can observe any error messages or undesired behavior.

MPSAdmin · Feb 19, 2018, 8:25 PM

@wayne-workman
missed that part, sorry! I’ll take a shot.

MPSAdmin · Feb 19, 2018, 8:35 PM

ok… I noticed something else… the portions I deleted from the originall fogreplicator.log are html pages from the synology. Is there a reason that the fog server is pulling html files from the synology?

Wayne Workman · Feb 19, 2018, 8:37 PM

@mpsadmin said in Continuous Fog Storage Node Replication problem:

Is there a reason that the fog server is pulling html files from the synology?

It could be that the FTP Root is not set correctly for the synology. See this section: https://wiki.fogproject.org/wiki/index.php?title=Troubleshoot_FTP#FTP_Path There are notes in there specifically about Synology devices. Use the troubleshooting higher in the article to determine what the FTP Root path is.

george1421 · Feb 19, 2018, 9:37 PM

Here is my POC tutorial to setup a synology nas as a FOG storage node: https://forums.fogproject.org/topic/9430/synology-nas-as-fog-storage-node

You need to watch directory permission on the synology NAS as well as nfs share permissions.

MPSAdmin · Feb 19, 2018, 10:18 PM

Still doing the same thing. Rolling right through each file over and over again. I changed the rights to the folders as recommended.

Wayne Workman · Feb 19, 2018, 10:26 PM

@mpsadmin But did you check the FTP root by logging in via FTP?

MPSAdmin · Feb 19, 2018, 10:28 PM

@george1421
Hi George. I had hoped that you would chime in as I followed your fantastic storage node document when I set this up.
in just noticed that the ‘images’ shared folder didn’t have rights for the fog user.

MPSAdmin · Feb 19, 2018, 10:33 PM

@wayne-workman
yes I did. I logged in via ftp and was able to browse with no issues.

george1421 · Feb 19, 2018, 4:37 PM

@mpsadmin So are the files actually making it to the NAS? The only reason why the fog server would keep replicating is because the check sums would not match so it will send the file over again. Possibly date/time mismatch might trigger the replication again, but I think they are focusing on the check sum as the key to replicate.

Wayne Workman · Feb 20, 2018, 8:37 PM

@mpsadmin said in Continuous Fog Storage Node Replication problem:

I logged in via ftp and was able to browse with no issues.

That’s not what I am referring to - I would like for you to FTP into the NAS and figure out where you land - i.e. the FTP Path directory.

Is the directory where you land the FTP Path that is set for this node?
What is your landing directory?

MPSAdmin · Feb 20, 2018, 8:37 PM

@wayne-workman Apologies for not providing clearer info. The paths for the storage node are configured within fog as follows:

The ftp paths are as follows:

The files being replicated are within the G3-0118.1 folder, as listed below:

the source folder on the fog server is the /images folder, as shown below.

Additionally, I have verified that both the synololgy and the fog server are using the same ntp source as the rest of the devices on the network. (a windows domain controller). After changing the ntp settings, i stopped the fog replication service, deleted the files from the synology folder, and restarted the replication service.

Thanks. I’ll keep digging. Most likely it is something simple that I have done.

MPSAdmin · Feb 20, 2018, 8:40 PM

@george1421 yes, the files are making it to the NAS. Fog is replicating at full speed, up to the configured bandwidth limit. Once the files are replicated, the process begins anew.

Continuous Fog Storage Node Replication problem

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