Docker logs empty after recreating simplexmq container

[mrg358]

After recreating simplexmq container, docker no longer outputs smp-server.log content.

[shumvgolove]

Please specify exact steps to reproduce the issue.

[mrg358]

Sure. I tried to reproduce again fresh. Same results.

Step 1.

docker run -d -e addr="smp1.example.net" -p 5223:5223 -v $HOME/simplex/config:/etc/opt/simplex:z -v $HOME/simplex/logs:/var/opt/simplex:z --name simplexmq simplexchat/simplexmq

--name simplexmq simplexchat/simplexmq
0aa8c59aac27456c14bbd5f24c80e8ab667306f0779dfbc1d24a3aabcdef455b

Step 2.

docker logs -f simplexmq

Signature ok
subject=CN = smp1.example.net
Getting CA Private Key
Server initialized, you can modify configuration in /etc/opt/simplex/smp-server.ini.
Run `smp-server start` to start server.
----------
You should store CA private key securely and delete it from the server.
If server TLS credential is compromised this key can be used to sign a new one, keeping the same server identity and established connections.
CA private key location:
/etc/opt/simplex/ca.key
----------
SMP server v4.3.1
Fingerprint: IJzSOqjnrF-dsybOHO0DVSRY3oXq5abFZ3M347htB5g=
Server address: smp://IJzSOqjnrF-dsybOHO0DVSRY3oXq5abFZ3M347htB5g=@smp1.example.net

fresh start with newly created volumes looks ok.

Step 3.

docker stop simplexmq && docker rm simplexmq

Step 4.

docker run -d -e addr="smp1.example.net" -p 5223:5223 -v $HOME/simplex/config:/etc/opt/simplex:z -v $HOME/simplex/logs:/var/opt/simplex:z --name simplexmq simplexchat/simplexmq

--name simplexmq simplexchat/simplexmq
31c5d07de2b307ac011b1c9ab5f473194b0e6cb17ac486e06e51440e546e837a

Step 5.

docker logs -f simplexmq

docker logs empty, no status.

Step 6.

sudo tail -f /home/ubuntu/simplex/logs/smp-server.log

SMP server v4.3.1
Fingerprint: IJzSOqjnrF-dsybOHO0DVSRY3oXq5abFZ3M347htB5g=
Server address: smp://IJzSOqjnrF-dsybOHO0DVSRY3oXq5abFZ3M347htB5g=@smp1.example.net
Store log: /var/opt/simplex/smp-server-store.log
Listening on port 5223 (TLS)...
not expiring inactive clients
creating new queues allowed
[INFO 2023-02-16 14:00:45 +0000 src/Simplex/Messaging/Server.hs:739] restoring messages from file /var/opt/simplex/smp-server-messages.log
[INFO 2023-02-16 14:00:45 +0000 src/Simplex/Messaging/Server.hs:749] messages restored

i can confirm simplexmq runs and functions ok, but docker fails to output smp-server.log file after container re-creation.

[samsapti]

@mrg358 the reason there's no output in docker logs, is probably due to the last line in entrypoint:

exec smp-server start > "$logd"/smp-server.log 2>&1

It redirects all output to smp-serverlog instead of stdout/stderr. Now, the reason it's printed the first time SimpleXMQ is run, is due to line 19 in entrypoint:

smp-server init -y -l "$@"

This is the first time initialization of the SMP server (hence it only outputs info on first run), notice that the output is not redirected to a file, so it prints to stdout/stderr, which is why it's catched by docker logs.

[shumvgolove]

Hey @samsapti

Yeah, you're right. Since docker logs is the proper way to log (duh) output of containers, I'll remove the redirection to the file in the entrypoint. Thanks for investigating.

[shumvgolove]

Should be fixed with 605970f . Please pull recent image from simplexchat/smp-server.