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Once we complete the building of the 700 SRPMs in the point release, they will start our QA process. These binary packages will be the same packages that we will use in the next full tree and they will be available as updates in the current CR repo in the current release. Once the packages have gone through enough of the QA process to ensure they are built correctly, do the normal things, and link against the proper libraries (tutorial; linking), the first set of updates that we will we release will be from our Continuous Release repository. If you have opted into CR repo (explained in the above link), then after we populate and announce the release of those packages, then a normal ‘yum update’ will upgrade you to the new packages.
A Docker registry provides a place to store and share docker containers that are saved as images that can be shared with other people. While you can build and store container images on your local system without installing a registry, or use the Docker Hub Registry to share your images with the world, installing a private registry lets you share your images with a private group of developers or users.
To get around this issue, you could use the yumdownloader docker-distribution command to download the package to a RHEL system, copy it to the Atomic system, install it on the Atomic system using rpm-ostree install. You could then set up the docker-distribution service as described below. RHEL Atomic Host does not support the yum command for installing packages.
Tools (such as openscap) are being integrated with container tools to allow them to scan a container image before you run it. Here is an example of investigating what a container image does before you run it:. In the mean time, however, you can use docker inspect to get some basic information about what an image does. You also have the option of mounting the image to your host system and using tools from the host to investigate what’s in the image.
Y ou’ll often find us in #atomic and/or #centos-devel if you have questions. The SIG meets every two weeks on Tuesday at 04 :00 UTC in #centos-devel, and on the alternating weeks, meets as part of the Project Atomic community meeting at 16:00 UTC on Monday in the #atomic channel. You can also join the atomic-devel mailing list if you’d like to discuss the direction of Project Atomic, its components, or have other questions.
To configure the kubelet service, edit the /etc/kubernetes/kubelet and modify the KUBELET_ARGS line to read as follows (all other content can stay the same):. Configure the kubelet service : Because the manifests define Kubernetes services as pods, the kubelet service is needed to start these containerized Kubernetes services.
To set up a more formal and permanent Kubernetes configuration, Red Hat recommends using OpenShift Container Platform. Because it involves only one master and one node on the same system, it is not scalable. The example you have just seen is a simple approach to getting started with Kubernetes.
Outside of the Atomic Host itself, the SIG has updated its Kubernetes container
images to be usable as system containers.
Last week, the CentOS Atomic SIG released. If you’re interested in Atomic Host, containers, and Kubernetes, you’ll have plenty to do for the whole week.
The tool is available in packaged form for CentOS and for Ubuntu hosts, so I figured I’d avail myself of the package-layering capabilities of CentOS Atomic Host Continuous to install the kubeadm rpm on a few of these hosts to get up and running with an up-to-date and mostly-containerized kubernetes cluster.
Where I typically run CentOS Atomic with Kubernetes rpms from the CentOS project or with containers based on those rpms, and the same with Fedora.