Monday, June 26, 2017

Another Base Image Option: Alpine for s390x

Alpine Linux has announced their new 3.6 release which includes s390x support. Alpine is a minimal Linux distro. Contrary to other distributions, it uses musl as runtime library (not glibc), helping in downsizing images.

A Docker image named s390x/alpine is available at Docker Hub and while being a fully functional base, it is just 2 MB (!) in size:

Friday, June 23, 2017

New Naming Scheme for Docker Releases

It's a while since Docker changed their naming system. In the past, the version looked like 1.xx, with xx counting up. After 1.13, Docker moved to a scheme that is easy to grasp and accommodates various life cycles of free and commercial releases.

Thursday, June 22, 2017

Docker in the Datacenter

In this year's DockerCon back in April 2017, then-Docker CEO Ben Golub announced Docker will support the mainframe (and Power).

While technically, this is no news, it means Docker, Inc. will support s390x -- good news and another option besides distribution offerings for those looking at running Docker in production on the mainframe. More details to follow as they are announced and available.

Wednesday, June 21, 2017

Relaunch of Containerz Blog

After quite some inactivity on this blog, I decided to revive this blog. Expect to read regularly about news, how-tos and other information related to container technology on the mainframe. A few posts are in the pipe already.

Friday, September 16, 2016

Docker 1.12 builds for Ubuntu

Ubuntu has built Docker 1.12 binaries, which target latest and greatest, but can be used on 16.04. Since Docker 1.12 has been split into docker, containerd and runc, there are three packages that need to be installed.

Friday, August 26, 2016

SLES12 also on Docker level 1.11.2

Yesterday, SUSE published a maintweb update of Docker in their SLE 12 Containers Module. That makes Docker 1.11.2 available on all distros (check a previous post for Ubuntu binaries and IBM binaries for RHEL 7).

Thursday, July 21, 2016

Multi-Arch Registry and Images

It has been a while since multi-architecture support has been developed and brought upstream. Multi-architecture support allows to put several images behind a common identifier in a registry. With that, a consumer of the image won't have to think about pulling the right binary flavor of the image, it's done right automatically for him.

A couple of things play together for this magic: