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Full Discussion: Docker is dead - cri-o the new best practice
Top Forums UNIX for Advanced & Expert Users Docker is dead - cri-o the new best practice Post 303045896 by stomp on Friday 17th of April 2020 12:08:11 PM
Old 04-17-2020
Docker is dead - cri-o the new best practice
Since some time now docker is being on the fall and is being abandoned as provider for container technology.

Red Hat already threw docker out of its Red Hat Enterprise Linux (all Versions 6,7 and 8) last year. The Cloud Native Computing Foundation replaced docker as recommended container technology with CRI-O (Container Runtime Interface) as best practice.

Furthermore the acquisition of Docker Enterprises(=Docker Swarm Product) part of Docker Inc. by Mirantis is a clear sign of its current declining meaning for its future in the area of containers.

Red Hats way is to foster CRI-O (the runtime system) and podman (the management cli tools). CRI-O is better in ways of using less system resources. Also CRI-O does not use an additional daemon as docker does.

For migration simplicity podman is designed to have the commands very similar/identical to the corresponding docker commands. As I understood, the CRI-O maintains compatibility to dockerfiles and images, so a migration will be easy.

Nice to look at: The Cloud Native Computing Foundation Interactive Landscape

CNCF Cloud Native Interactive Landscape
Last edited by stomp; 04-20-2020 at 05:48 AM..
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LEARN ABOUT CENTOS

rhn_register

RHN_REGISTER(8) 						   Red Hat, Inc.						   RHN_REGISTER(8)

NAME

       rhn_register - Connect to Spacewalk Server, Red Hat Satellite or Red Hat Network Classic.

SYNOPSIS

       rhn_register [options]

DESCRIPTION

       rhn_register  is  a  client  program  that registers your system with "Spacewalk Server", "Red Hat Satellite" or "Red Hat Network Classic".
       After registering, your system can receive software updates, install new software, and remotely manage your system.  It	can  run  both	in
       graphical and text modes.

OPTIONS

       -v, --verbose
	      Increase the debugging output.

       --proxy=PROXY
	      Specify an http proxy to use.

       --proxyUser=PROXYUSER
	      Specify a username to use for an authenticated proxy. This option must be used in conjunction with proxyPassword.

       --proxyPassword=PROXYPASSWORD
	      Specify a password to use for an authenticated proxy. This option must be used in conjunction with proxyUser.

       --nox  Run in text mode.

       --version
	      Show the program's version number and exit.

       -h, --help
	      Show a help message and exit.

FILES

       /etc/sysconfig/rhn/systemid
	      The  digital server ID for this machine if the system has been registered onto "Spacewalk Server" or "Red Hat Satellite" or "Red Hat
	      Network Classic".  This file does not exist otherwise.

       /etc/sysconfig/rhn/up2date
	      The common configuration file used by Red Hat client programs.

SEE ALSO

       rhn_check(8), rhnreg_ks(8), rhnsd(8), rhn-profile-sync(8), rhnplugin(8), up2date(5).

AUTHORS

       See the AUTHORS file included with this software.

       This manual page was written by James Bowes <jbowes@redhat.com>

BUGS

       Report bugs to <http://bugzilla.redhat.com>.

COPYRIGHT

       Copyright (C) 1999-2011 Red Hat, Inc.

       This is free software; see the source for copying conditions.  There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICU-
       LAR PURPOSE.

Linux								  2011 February 4						   RHN_REGISTER(8)
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