RUNON - Run your commands in any systems ======================================== (c) 2021 Gilles Grandou licensed under GPL-2.0. home: https://git.grandou.net/gilles/runon Quick HOWTO ----------- $ grep ^PRETTY_NAME /etc/os-release PRETTY_NAME="Debian GNU/Linux 10 (buster)" $ runon centos7 grep ^PRETTY_NAME /etc/os-release PRETTY_NAME="CentOS Linux 7 (Core)" $ runon ubuntu20.04 grep ^PRETTY_NAME /etc/os-release PRETTY_NAME="Ubuntu 20.04.2 LTS" $ runon debian9 grep ^PRETTY_NAME /etc/os-release PRETTY_NAME="Debian GNU/Linux 9 (stretch)" $ runon centos7 xclock [xclock launched!] Install ------- Installation is only tested on Debian 10, even though it should work straightforward on any equivalent system. ### Docker Install sudo apt install docker Check that your user is part of `docker` group: sudo adduser docker If needed, you need to logout and login again for the new group to become active. ### manual install cd git clone https://git.grandou.net/gilles/runon local install, in your `~/local/bin` (or wherever directory which is in your PATH): cd ./install local or ./install local system install, for all users: cd sudo ./install system each user can have its own configuration in `~/.config/runon/runon.conf` if needed. ### uninstall simply pass `-u` to install command you have used, eg.: ./install local -u ./install local -u sudo ./install system -u ### some convenient links you can create soft links to `runos` to simplify calls: cd /usr/local/bin ln -s runon centos7 now calling `centos7 ...` is equivalent to call `runos centos7 ...`: centos7 xclock Usage ----- With the default configuration, a seamless environment is set up, allowing to transparently run commands in various environments, while keeping: * user environment (uid, gid, password, home directory, ...) * X support to run graphical applications ### Basic usage runon [options] runon -h ### available options * `-v` verbose output, this is really usefull when running new containers for the first time, as the initial docker build can be quite long (several minutes) especially with slow internet link. If the command seems to be stalled, don't hesitate to interrupt it (with `CTRL-C`) and to restart it with `-v`. * `-u` forces the container image to be updated, useful if the distribution has been updated and you want to use it. Otherwise, if a container has been already built, it will be used directly without doing any network access. * `-c ` uses a custom config file, useful to try new distribution without breaking your running config. ### Interactive shell Just run: runon while start an insteractive shell in the container system: gilles@host:~$ runon centos8 (centos8) gilles@host:~$ cat /etc/os-release NAME="CentOS Linux" VERSION="8" ID="centos" ID_LIKE="rhel fedora" VERSION_ID="8" PLATFORM_ID="platform:el8" PRETTY_NAME="CentOS Linux 8" ANSI_COLOR="0;31" CPE_NAME="cpe:/o:centos:centos:8" HOME_URL="https://centos.org/" BUG_REPORT_URL="https://bugs.centos.org/" CENTOS_MANTISBT_PROJECT="CentOS-8" CENTOS_MANTISBT_PROJECT_VERSION="8" (centos8) gilles@host:~$ id uid=1000(gilles) gid=1000(gilles) groups=1000(gilles) (centos8) gilles@host:~$ sudo id [sudo] password for gilles: uid=0(root) gid=0(root) groups=0(root) (centos8) gilles@host:~$ xclock ^C (centos8) gilles@host:~$ exit exit gilles@host:~$ Configuration ------------- Configuration is done in `runon.conf` file, which describes supported distribution in .INI format. ### Example config ``` [DEFAULT] environment = HOME USER DISPLAY debian_chroot=${osname} binds = /etc/passwd:ro /etc/group:ro /etc/shadow:ro /tmp/.X11-unix:ro /home/${user} [centos8] dockerfile = FROM centos:8 RUN yum install dnf-plugins-core -y RUN yum config-manager --set-enabled powertools -y RUN yum install sudo -y RUN echo "Defaults lecture = never" >> /etc/sudoers RUN echo "ALL ALL=(ALL) ALL" >> /etc/sudoers pkginstall = RUN yum install {} -y packages = ksh csh xterm xorg-x11-apps xkeyboard-config git [debian9] dockerfile = FROM debian:9 RUN apt-get update RUN apt-get -y install sudo RUN echo "Defaults lecture = never" >> /etc/sudoers pkginstall = RUN apt-get -y install {} packages = ksh csh xterm x11-apps libgtk-3-0 build-essential git ``` Each section `[osname]` defines a distribution which can be used by runon. The `[DEFAULT]` section defines default values which is used if not overriden in individual section. ### Config entries * `dockerfile` the base content of dockerfile which will be used to generate the running environment. There is usually no need to diverge from the ones given in example. * `pkginstall` the dockerfile command used to install a package, likely to be standard for all `deb` and `rpm` based distributions. In the command `{}` is replaced by the package name. * `packages` the list of packages to install. Feel free to add the ones you need for your commands (likely news system libs, new tools, ...) * `binds` the list of files and directories from the host system to expose in the container system. you might want to add `/opt` or other shared directories. See below for a description of `binds` entries * `environment` the list of environment variables you want to pass or set in the container system. See below for a description Lines starting with `#` or `;` are comments. Some substitution happens upon reading the configuration: * `${user}` the current username * `${osname}` the executed distribution. ### Binds Each `binds` line can have one of the following formats: : : :: with: * `` is the filename or the dirname of the path you want to expose * `` is the pathname inside the container, by default it's the same path. * `` can be `rw`, read-write (by default), or `ro`, read-only. ### Environment Each `environment` line define a Environment Variable which is set in the container upon execution. Each line can have one of the following formats: = If no value is given, the host value is passed into the container.