People, On 2020-03-23 12:16, Philip Rhoades wrote: > People, > > I want to have a MTA running from a container but is it possible for > the containerised MTA: > > 1. to deliver mails to users on the host's file system dir (eg > /home/user/Maildir)? > > 2. to have access to the host's: > >    /etc/passwd >    /etc/shadow >    /etc/group >    /etc/gshadow > > files for users who are logging in to the host to look at their mails? I worked out that I could use the run "-v" switch to answer Q #1 Thanks, Phil.

I always have a bad feeling about mounting /etc :-( Personally, I prefer creating a directory in /src for everything. This is what I use for my wiki: #!/bin/bash podman run -d --read-only -p 80:80 --name learn.fatherlinux.com <http://learn.fatherlinux.com> \ -v /srv/learn.fatherlinux.com/code/mediawiki:/var/www/html/learn.fatherlinux.com:Z <http://learn.fatherlinux.com/code/mediawiki:/var/www/html/learn.fatherlin... \ -v /srv/learn.fatherlinux.com/config/LocalSettings.php:/var/www/html/learn.fatherlinux.com/LocalSettings.php:Z <http://learn.fatherlinux.com/config/LocalSettings.php:/var/www/html/learn... \ -v /srv/learn.fatherlinux.com/config/learn.fatherlinux.com.conf:/etc/httpd/conf.d/learn.fatherlinux.com.conf:Z <http://learn.fatherlinux.com/config/learn.fatherlinux.com.conf:/etc/httpd... \ -v /srv/learn.fatherlinux.com/config/htpasswd:/etc/httpd/conf.d/htpasswd:Z <http://learn.fatherlinux.com/config/htpasswd:/etc/httpd/conf.d/htpasswd:Z... \ -v /srv/learn.fatherlinux.com/data/mariadb/:/var/lib/mysql:Z <http://learn.fatherlinux.com/data/mariadb/:/var/lib/mysql:Z> \ -v /srv/learn.fatherlinux.com/data/images/:/var/www/html/learn.fatherlinux.com/images:Z <http://learn.fatherlinux.com/data/images/:/var/www/html/learn.fatherlinux... \ -v /srv/learn.fatherlinux.com/data/skins/:/var/www/html/learn.fatherlinux.com/skins:Z <http://learn.fatherlinux.com/data/skins/:/var/www/html/learn.fatherlinux.... \ --tmpfs /etc \ --tmpfs /var/log/ \ --tmpfs /var/tmp \ localhost/wiki Best Regards Scott M On Mon, Mar 23, 2020 at 8:48 AM Daniel Walsh <dwalsh(a)redhat.com <mailto:dwalsh@redhat.com>> wrote: On 3/22/20 23:23, Philip Rhoades wrote: > People, > > > On 2020-03-23 12:16, Philip Rhoades wrote: >> People, >> >> I want to have a MTA running from a container but is it possible for >> the containerised MTA: >> >> 1. to deliver mails to users on the host's file system dir (eg >> /home/user/Maildir)? >> >> 2. to have access to the host's: >> >>    /etc/passwd >>    /etc/shadow >>    /etc/group >>    /etc/gshadow >> >> files for users who are logging in to the host to look at their mails? > > > I worked out that I could use the run "-v" switch to answer Q #1 > > Thanks, > > Phil. > Something like # podman run --security-opt label:disable -v /etc:/etc:ro -v /home/home ... MTAIMAGE ... Might work.   Or you would have to get more fine grained on /etc mounts. _______________________________________________ Podman mailing list -- podman(a)lists.podman.io <mailto:podman@lists.podman.io> To unsubscribe send an email to podman-leave(a)lists.podman.io <mailto:podman-leave@lists.podman.io> -- -- Scott McCarty, RHCA Product Management - Containers, Red Hat Enterprise Linux & OpenShift Email: smccarty(a)redhat.com <mailto:smccarty@redhat.com> Phone: 312-660-3535 Cell: 330-807-1043 Web: http://crunchtools.com Using Azure Pipelines with Red Hat Universal Base Image and Quay.io: https://red.ht/2TvYo3Y _______________________________________________ Podman mailing list -- podman(a)lists.podman.io To unsubscribe send an email to podman-leave(a)lists.podman.io

People, I want to have a MTA running from a container but is it possible for the containerised MTA: 1. to deliver mails to users on the host's file system dir (eg /home/user/Maildir)? 2. to have access to the host's: /etc/passwd /etc/shadow /etc/group /etc/gshadow files for users who are logging in to the host to look at their mails? Thanks, Phil. -- Philip Rhoades PO Box 896 Cowra NSW 2794 Australia E-mail: phil(a)pricom.com.au _______________________________________________ Podman mailing list -- podman(a)lists.podman.io To unsubscribe send an email to podman-leave(a)lists.podman.io

It's possible, but it would require running the container in a privileged mode. It would essentially mitigate any security benefit you get from running the MTA in containers. I would recommend copying all of these files into a directory in /srv dedicated to the service (in this case the MTA). For example, I would create a directory structure something like: /srv/mail.example.com/etc/passwd /srv/mail.example.com/etc/shadow /srv/mail.example.com/etc/etc/group /srv/mail.example.com/etc/etc/gshadow /srv/mail.example.com/etc/home/user/Maildir Then, I would bind mount each of these in. This is what I do for Mediawiki, MySQL, and Wordpress. Sadly, I don't think I've created a GitHub repo to show people how to do it. Personally, I also run systemd in the container (because I hate reverse engineering startup scripts) and I run the whole thing read-only. IMHO, thisngives me a balance of security and convenience. If you don't run systemd, you could even run rootless. Best Regards Scott M On Sun, Mar 22, 2020, 9:18 PM Philip Rhoades <phil(a)pricom.com.au&gt; wrote: > People, > > I want to have a MTA running from a container but is it possible for the > containerised MTA: > > 1. to deliver mails to users on the host's file system dir (eg > /home/user/Maildir)? > > 2. to have access to the host's: > > /etc/passwd > /etc/shadow > /etc/group > /etc/gshadow > > files for users who are logging in to the host to look at their mails? > > Thanks, > > Phil. > -- > Philip Rhoades > > PO Box 896 > Cowra NSW 2794 > Australia > E-mail: phil(a)pricom.com.au > _______________________________________________ > Podman mailing list -- podman(a)lists.podman.io > To unsubscribe send an email to podman-leave(a)lists.podman.io > _______________________________________________ Podman mailing list -- podman(a)lists.podman.io To unsubscribe send an email to podman-leave(a)lists.podman.io