On 2 October 2017 at 18:03, Larry Martell larry.martell@gmail.com wrote:

On Mon, Oct 2, 2017 at 5:29 PM, Stephen John Smoogen smooge@gmail.com wrote:

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On 2 October 2017 at 17:21, Larry Martell larry.martell@gmail.com wrote:

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I an running CentOS7 in a docker container. I need to send email from that container so I installed sendmail and then I run:

m4 /etc/mail/sendmail.mc > /etc/mail/sendmail.cf` and when I try and send mail it fails with:

larry.martll@gmail.com... Connecting to [127.0.0.1] via relay... larry.martll@gmail.com... Deferred: Connection refused by [127.0.0.1]

Anyone know how I can configure sendmail so that I can send mail?

Does this help any?

https://stackoverflow.com/questions/26215021/configure-sendmail-inside-a-doc...

That post is a bit overwhelming. It has 20+ answers and all are different.

I have another container running debian buster and in there I do"

yes yes | sendmailconfig

and then I can send mail. But I don't see sendmailconfig in CentOS7. Is there an equivalent?

Sendmail is not the standard email server for EL7 so I am a bit rusty here. The item that caught my attention was the following:

------ I figured out a way myself, although not the most elegant solution. I configured the sendmail inside my docker so as to Relay the request via host's ip. Add the following line to the file "/etc/mail/access

Connect:<host_ip_here> RELAY Also, in the host as well as docker, comment out the following line in the file "/etc/mail/sendmail.mc" by prefixing it with "dnl #" and suffixing with "dnl".

DAEMON_OPTIONS(`Port=smtp,Addr=127.0.0.1, Name=MTA') I passed the host ip as an environment variable to the docker container, so that it is configurable. Now the docker's sendmail will relay it's sendmail's smtp request via host machine.

-------

Beyond that I am not going to be much help as I have not had much experience with docker.

On Mon, Oct 2, 2017 at 3:40 PM, Larry Martell larry.martell@gmail.com wrote:

Ok thanks I will try this. But I am not married to sendmail. I will use anything that allows me to send mail from the container.

Try ssmtp if you are only interest is outbound emails, through some kind of SMTP relay service (mailgun/sendgrid etc.).

-- Arun Khan

On Mon, 2017-10-02 at 23:18 +0000, Larry Martell wrote:

On Mon, Oct 2, 2017 at 6:26 PM Stephen John Smoogen

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Sendmail is not the standard email server for EL7

What is the the standard email server?

Postfix

P.

Here is my complete setup with Docker for example.

what I use: CentOS and Mate Desktop,systemd and VNC. It provides additional OpenVPN and Tor. Mate works better as gnome desktop. If somebody is interested.

Downloaded adobe and nux repo for VLC (needs to be hacked to run as root).

https://github.com/CentOS/sig-cloud-instance-images/tree/66add29c188e42d4d85... https://github.com/CentOS/sig-cloud-instance-images/tree/66add29c188e42d4d855f4d4acdb2b73d547edb6/docker

Everything runs as root as a test case.

Cheers

Andy

Sample setup:

FROM scratch ADD centos-7.4.1708-docker.tar.xz /

LABEL name="CentOS Base Image" \ vendor="CentOS" \ license="GPLv2" \ build-date="20170911"

COPY adobe-release-x86_64-1.0-1.noarch.rpm /root/adobeflash.rpm COPY nux-dextop-release-0-5.el7.nux.noarch.rpm /root/nux.rpm

RUN yum -y install /root/adobeflash.rpm; \ yum -y install epel-release; \ yum -y install /root/nux.rpm; \ rm -f /root/adobeflash.rpm /root/nux.rpm; \ yum -y update; \ yum install -y tigervnc-server xterm ; \ yum install -y mate-applets mate-backgrounds.noarch mate-control-center mate-control-center-filesystem mate-desktop mate-desktop-libs mate-icon-theme mate-menus mate-menus-libs mate-notification-daemon mate-panel mate-panel-libs mate-polkit mate-session-manager mate-settings-daemon mate-system-monitor mate-terminal mate-themes mate-user-guide caja-open-terminal caja-wallpaper pluma engrampa unrar p7zip; \ yum -y install gnome-icon-theme.noarch gnome-keyring gnome-themes-standard;

RUN yum install -y bind-utils net-tools traceroute tor openvpn openssh-server openssh-clients;

RUN yum install -y firefox thunderbird vlc eog ; sed -i 's/geteuid/getppid/' /usr/bin/vlc;

RUN rm -f /etc/localtime;cd /etc; ln -s ln -s ../usr/share/zoneinfo/Europe/Amsterdam localtime

RUN yum -y install ntp; systemctl enable ntpd

RUN (cd /lib/systemd/system/sysinit.target.wants/; for i in *; do [ $i == systemd-tmpfiles-setup.service ] || rm -f $i; done); \ rm -f /lib/systemd/system/multi-user.target.wants/*;\ rm -f /etc/systemd/system/*.wants/*;\ rm -f /lib/systemd/system/local-fs.target.wants/*; \ rm -f /lib/systemd/system/sockets.target.wants/*udev*; \ rm -f /lib/systemd/system/sockets.target.wants/*initctl*; \ rm -f /lib/systemd/system/basic.target.wants/*;\ rm -f /lib/systemd/system/anaconda.target.wants/*; \ systemctl enable tor; systemctl enable sshd

VOLUME [ "/sys/fs/cgroup" ]

RUN echo -e 'vncpassword\vncpassword\n' | vncpasswd

RUN cp /lib/systemd/system/vncserver@.service /etc/systemd/system/vncserver@:0.service RUN sed 's/<USER>/root/g' -i /etc/systemd/system/vncserver@:0.service

RUN sed 's//usr/bin/vncserver %i//usr/bin/vncserver %i -geometry 1280x1024/g' -i /etc/systemd/system/vncserver@:0.service

RUN sed 's//home/root//root/g' -i /etc/systemd/system/vncserver@:0.service

RUN systemctl enable vncserver@:0.service

RUN echo "#!/bin/sh" > /root/.vnc/xstartup RUN echo "unset SESSION_MANAGER" >> /root/.vnc/xstartup RUN echo "unset DBUS_SESSION_BUS_ADDRESS" >> /root/.vnc/xstartup RUN echo "#exec /etc/X11/xinit/xinitrc" >> /root/.vnc/xstartup RUN echo "/usr/bin/mate-session" >> /root/.vnc/xstartup RUN chmod +x /root/.vnc/xstartup

EXPOSE 5900

CMD ["/usr/sbin/init"]

# docker build --squash --rm --no-cache -t 'centos/mate‘ .

#example of runs versions... # docker run --privileged --device=/dev/tun0:/dev/net/tun -p 24:22 -p 5901:5900 -d 'centos/mate' # docker run --rm -it --net=host --name docker-myimage -v /sys/fs/cgroup:/sys/fs/cgroup:ro -d 'centos7.4.1708/systemd' -p 5901:5901