Trying to understand files and folders in data folder

maybl8

in the following folder:
/opt/mailcow-dockerized/mailcow-dockerized/data/conf/postfix/

In the main.cf I have the following entries:

smtpd_tls_cert_file = /etc/ssl/mail/cert.pem
smtpd_tls_key_file = /etc/ssl/mail/key.pem
tls_server_sni_maps = hash:/opt/postfix/conf/sni.map

There is no /etc/ssl/mail folder on my system
There is no /opt/postfix/ folder on my system.

My mailcow is running just fine.

How does this work?
Thanks

accolon

Mailcow uses Docker volumes to make local folders available inside containers.

All your configuration is in /opt/mailcow-dockerized (if you followed the default installation instructions). In docker-compose.yml, e.g. the following volume is set for Postfix:
./data/assets/ssl:/etc/ssl/mail/:ro,z

https://github.com/mailcow/mailcow-dockerized/blob/e691d2c78216c2628d9a08abe6f6f63c45802f87/docker-compose.yml#L305

This means /etc/ssl/mail inside the container is mapped to ./data/assets/ssl in your mailcow folder, set to read-only.

The same goes for the other folder you mentioned.

maybl8

accolon
First I don’t have a .data folder . Mine is just called data.

I would like to note that mailcow is installed on a arch linux machine.
It is working just fine and I installed it per the instructions.

Here is the tree of my /opt folders:

[demo@mail opt]$ ls -la
total 20
drwxr-xr-x  5 root root 4096 May 13 09:13 .
drwxr-xr-x 18 root root 4096 Apr 21 03:13 ..
drwx--x--x  4 root root 4096 May  7 10:56 containerd
drwxr-xr-x  3 root root 4096 May  7 10:49 mailcow-dockerized
drwxr-xr-x  5 root root 4096 May 13 09:13 sublime_text

[demo@mail mailcow-dockerized]$ ls -la
total 12
drwxr-xr-x 3 root root 4096 May  7 10:49 .
drwxr-xr-x 5 root root 4096 May 13 09:13 ..
drwxr-xr-x 7 root root 4096 May 31 10:02 mailcow-dockerized

[demo@mail mailcow-dockerized]$ cd mailcow-dockerized/
[demo@mail mailcow-dockerized]$ ls -la
total 196
drwxr-xr-x 7 root root  4096 May 31 10:02 .
drwxr-xr-x 3 root root  4096 May  7 10:49 ..
-rw-r--r-- 1 root root  3223 May  7 10:49 CODE_OF_CONDUCT.md
-rw-r--r-- 1 root root  1003 May  7 10:49 CONTRIBUTING.md
-rwxr-xr-x 1 root root   174 May  7 10:49 create_cold_standby.sh
drwxr-xr-x 7 root root  4096 May  7 10:49 data
-rw-r--r-- 1 root root 22564 May 31 10:01 docker-compose.yml
-rw-r--r-- 1 root root   414 May  7 10:49 .editorconfig
lrwxrwxrwx 1 root root    12 May  7 10:49 .env -> mailcow.conf
-rwxr-xr-x 1 root root 18578 May  7 10:49 generate_config.sh
drwxr-xr-x 8 root root  4096 May 31 10:01 .git
drwxr-xr-x 4 root root  4096 May  7 10:49 .github
-rw-r--r-- 1 root root  1774 May  7 10:49 .gitignore
drwxr-xr-x 3 root root  4096 May 31 10:01 helper-scripts
-rw-r--r-- 1 root root 35141 May  7 10:49 LICENSE
-rw------- 1 root root  8467 May 31 10:02 mailcow.conf
-rwxr-xr-x 1 root root   126 May 22 09:40 netfilter.sh
-rw-r--r-- 1 root root  1908 May  7 10:49 README.md
-rw-r--r-- 1 root root  1737 May  7 10:49 SECURITY.md
drwxr-xr-x 2 root root  4096 May 31 09:59 update_diffs
-rwxr-xr-x 1 root root 44366 May 26 14:18 update.sh

[demo@mail mailcow-dockerized]$ cd data
[demo@mail data]$ ls -la
total 28
drwxr-xr-x  7 root root 4096 May  7 10:49 .
drwxr-xr-x  7 root root 4096 May 31 10:02 ..
drwxr-xr-x  8 root root 4096 May  7 10:53 assets
drwxr-xr-x 11 root root 4096 May  7 10:49 conf
drwxr-xr-x 16 root root 4096 May  7 10:49 Dockerfiles
drwxr-xr-x  8 root root 4096 May  7 10:49 hooks
drwxr-xr-x 12 root root 4096 May  7 11:00 web

[demo@mail data]$ cd assets
[demo@mail assets]$ ls -la
total 32
drwxr-xr-x 8 root root 4096 May  7 10:53 .
drwxr-xr-x 7 root root 4096 May  7 10:49 ..
drwxr-xr-x 2 root root 4096 May  7 10:49 mysql
drwxr-xr-x 2 root root 4096 May  7 10:49 nextcloud
drwxr-xr-x 2 root root 4096 May  7 10:49 passwd
drwxr-xr-x 4 root root 4096 Jun 16 12:14 ssl
drwxr-xr-x 2 root root 4096 May  7 10:49 ssl-example
drwxr-xr-x 2 root root 4096 May  7 10:49 templates

[demo@mail assets]$ cd ssl
[demo@mail ssl]$ ls -la
total 32
drwxr-xr-x 4 root root 4096 Jun 16 12:14 .
drwxr-xr-x 8 root root 4096 May  7 10:53 ..
drwxr-xr-x 2 root root 4096 May  7 11:04 acme
-rw-r--r-- 1 root root 5946 Jun 16 12:14 cert.pem
-rw-r--r-- 1 root root  424 May  7 10:53 dhparams.pem
-rw------- 1 root root 3272 Jun 16 12:14 key.pem
drwxr-xr-x 2 root root 4096 May  7 11:05 mail.dccathome.com

accolon

It’s ./data, not .data.

. represents the current directory.

No offense, but I don’t understand why people without even basic knowledge of Linux and command line try to run a public mail server on a distribution like Arch…

maybl8

accolon No offense taken but in Linux there is a difference between .data and data and Data and DATA
That comment does not help me or answers my question.
As you can see from my output I don’t have the etc folder anywhere.

mlcwuser

maybl8 No offense taken but in Linux there is a difference between .data and data and Data and DATA

He didn’t write .data, he wrote ./data, which is a small but important difference. The full path to the folder you’re looking for is /opt/mailcow-dockerized/data/assets/ssl.

maybl8

mlcwuser whatever from the directory listings above I don’t have etc dir anywhere under the /opt folders. Not that I can find anyway.

mlcwuser

maybl8 because /etc/ssl/mail/ is the path in the container to which /opt/mailcow-dockerized/data/assets/ssl will be mapped.

maybl8

mlcwuser So maybe I need to ask the question. How do I see the path in the container?
Is that the correct question? Because I don’t see etc/ssl/mail

mlcwuser

maybl8
docker exec -t -i mailcowdockerized-postfix-mailcow-1 /bin/bash
ls /etc/ssl/mail

You should then see exatcley the same files as in /opt/mailcow-dockerized/data/assets/ssl on your local file system.

maybl8

I am going to do some more research. That command line was what I was looking for. That helps
My /opt does not get me to the same place. I get 2 different folder lists when I do a ls or ls -la in each of those places.
Thanks for your help . I will take it from here.