Container is not able to connect to the internet using the bridge network on Synology DSM 7.2

[maneuss]

I tried to install the latest redmine image (5.1.2) after using redmine up to version 4.2.1 since a few years. I found that the actual image is not able to load ruby from the server which seems to be included up to version 5.1.0 of the image. At least 5.1.0 is the last version, which runs on my Synology ds920 (system and packages most recent versions). Also email is not available. So the bridge network seems not to be able to connect to the internet.

I set up a rule in the firewall to enable all ports for the bridge network IPs (172.18.0.0/16). But to no avail.

So: Sameersbn/redmine runs well up to version 5.1.0. Starting from 5.1.1 it doesn ´t boot up as the container cannot load ruby from th servers. It seems that the bridge network is blocked by Synology dsm, so that it is not able to get to the internet. Access to the redmine website is perfectly possible via the configured ports or via reverse proxy on my ds.

I tried to several versions of the image and defined version 5.1.1 onward as the ones where the problems started. The only difference in the container settings where that before 5.1 ruby 2.5 was included whereas starting from 5.1. ruby 3.2 is downloaded from a server.

Even before push emails and notifications could not be sent by the container. (So the principal problem existed from the beginning, it just wasn ´t so visible as I didn’t need notifications then.)

i introduced a rule in the firewall which allowed all ports for the bridge-networks ip addresses. I hoped that that would grant access to the internet for the container. Nothing happened.

I switched to the host network. There redmine booted up to version 5.1.2 but I was not able to get access to the container (defined port 30001 as redmine port and outgoing port of the container.

So there seems to be something fundamentally flawed in the networking settings either on the side of the container or Synology ´s.

An help? The ping-command seems not to be available in the container´s terminal. Is that true?

[maneuss]

today i followed the docker-support network tutorials with alpine. setting them up and running them internet access is possible, dns works and pinging servers and other containers poses no problems.

is there a configuration problem in the redmine image when uses with synology dsm?
is ping really not available in the redmine containerß

[jcormier]

Can you post any logs showing what you're talking about?

No ping is not installed inside the container. You can install it if you like. There is no networking setup required when making a docker image, its all just handled by either docker or the base image.

I know one other user had issues with 5.1+ and synologies older kernel. #549

[maneuss]

Hi and thanks for your fast response.
I ´m away from home for the next few days. I ´ll try and do it from afar. As i ´m not so accustomed to Linux and it´s variants it will take a likely time to get used to the system and BASH.
I ´ll try to respond as fast as possible.

Martin :)

[jcormier]

I've got plenty on my plate so no need to rush

[maneuss]

Hi Jonathan,
i was able to “solve” or at least circumvent the problem. I was rather discontent with my performance and so i just set up a completely new database/ data-dir/ container bundle - installed redmine from scratch.
after some adjustments it now works at least with an empty database.
i needed to do some additional settings in dsm, configuring the ports, proxy server and transferring the ssl-certificates - but now, with an empty database and empty data directory, it works.
so ím a little bit frightened what happens if i migrate the database and data-directory. But we will see.

Any suggestions as how to migrate the data in the most secure way. Of course i will read the available information on your site.

with best regards

martin

[jcormier]

Hmm, I'm glad you got a fresh server up and running. In general, the migration between versions should go smoothly. The only issues I've ever run into were with 3rd party plugins which have always made it difficult for me to upgrade redmine versions.

With that in mind, I always recommend making a test copy of the container and volumes to test the migration on, in case things go wrong, you can then delete the test copy and reach out for help.

If your still having trouble migrating your older database, logs would be mandatory to have any hope of figuring out what is going on. Also set DEBUG=true in the docker environment.

[maneuss]

Hi Jonathan,
i did some other testings, trying to migrate the database and the data directory manually but the container always stopped short after starting up. on synology dsm there seems to be no easy way (for me) to get to the logs of the container when it has stopped - even when debug is on. the container starts up, redmine is running for about 20 seconds then the container shuts down before i can have a look at the logs.

as redmine installation and testing is done in my spare time (being a gynecologist and obstetrician in a german hospital near hamburg) i´ll just accept this and start afresh with the new working configuration.
if you have an interest to clear this issue for further development then i will gladly try to get more information.

with best regards martin

ps:
wanted to use a simple filesystem repo in redmine. i just seem not to be able to get it to work which frustrates me even more. posted that in the redmine forums. do you know of any way to get direct help (payed if necessary)
pps:
is there any way to give you some compensation (paypal, ...) for your efforts in maintaining this container?

[jcormier]

For the log files you can volume mount the log directory so you can view them outside of the docker.
Example from the docker-compose.yml
/srv/docker/redmine/redmine-logs:/var/log/redmine

I'm not sure what a simple filesystem repo is. Could you link to the redmine wiki page?

Note i am on vacation though the next week so dont have a computer handy. I will help as i can.

[maneuss]

The filesystem-repo is not mentioned in the redmine wiki. the wiki itself is sort of outdated in some respects. if i have time and am able to solve my issues i plan to contribute something to the wiki.

in redmine 5.1.2 there is a "filesystem" selectable as shown by the screenshots below.
i cannot find any documentation regarding this "filesystem"-repo. nor seems it to be possible to add any files to the repo.

Martin