I am trying to setup Kubernetes on a s390x machines. Having downloaded packages kubeadm, kubectl and kubelet specific to s390x architecture. I was under the impression that kubeadm init will download the control pane images for the same architecture, which proved to be incorrect.
kubeadm init seems to have downloaded amd64 images which results in the following error standard_init_linux.go:187: exec user process caused "exec format error
Can someone please let me know if there are s390x specific images for the below containers, if yes please provide me the container tags or link to it please
k8s.gcr.io/kube-apiserver:v1.17.2
k8s.gcr.io/kube-controller-manager:v1.17.2
k8s.gcr.io/kube-scheduler:v1.17.2
k8s.gcr.io/kube-proxy:v1.17.2
k8s.gcr.io/pause:3.1
k8s.gcr.io/etcd:3.4.3-0
k8s.gcr.io/coredns:1.6.5
From the docs we can read:
kubeadm deb/rpm packages and binaries are built for amd64, arm (32-bit), arm64, ppc64le, and s390x following the multi-platform proposal.
Multiplatform container images for the control plane and addons are also supported since v1.12.
Only some of the network providers offer solutions for all platforms. Please consult the list of network providers above or the documentation from each provider to figure out whether the provider supports your chosen platform.
Repo for s390x is available here.
I think it might be helpful to follow this guide for Installing Kubernetes 1.12 on SUSE Linux using kubeadm
To solve the problem:
Download the control pane containers specific to s390x (kube-controller-manager-s390x:v1.17.2 etc..,)
Tag to the names in which kubeadm lookup
Run kubeadm init command
More information you can find here: kubernestes-for-s309x, kubeadm-s390x.
Resolved following with the below steps:
1) Downloaded the control pane images for s390x from k8s docker repository (kube-controller-manager-s390x:v1.17.2,, likewise)
2) Had to tag the images to kube-controller-manager:v1.17.2 , because kubeadm manifests looks for this name
3) initialized my cluster and there it is " Your Kubernetes control-plane has initialized successfully! "
Related
Are there any examples for creating a blockchain network on top of minikube environment?
Take a look at the following repositories where you can find helm charts which should facilitate the whole deployment process:
https://github.com/hyfen-nl/PIVT
https://github.com/splunk/hyperledger-fabric-k8s
Note that they require helm 2.11 and 2.16 or newer installed in your kubernetes cluster.
I have two servers at my home with Gentoo Linux ~amd64.I would like to install Kubernetes on them to play with it a bit.
Gentoo now packages all the Kubernetes related dependencies under one package called sys-cluster/kubernetes and the latest version available at the moment is 1.18.3.
the last time I played with Kubernetes was several years ago and I think I completely forgot everything.
so I installed kubernetes on both servers. since I use systemd and the package contains only kubelet systemd service I created systemd init scripts for also kube-apiserver, kube-controller-manager, kube-proxy and kube-scheduler.
now this package also comes with kubeadm but I would like to know how to install and configure kubernetes manually.
now I want to create a kubeconfig file for my cluster configuration.
I googled and found the following url: http://docs.shippable.com/deploy/tutorial/create-kubeconfig-for-self-hosted-kubernetes-cluster/
the first step is Make sure you can access the cluster but I thought I wanted to create kubeconfig in order for the services to properly know how to access my cluster!
this web site already talks about secrets that where already configured which aren't.. i'm starting from scratch and this is not probably the way to go.
In general I want to know how to properly create a kubeconfig file for my setup, then i'll configure the services to use this kubeconfig file and go on from there.
so any information regarding this issue would be greatly appreciated.
so I asked this also in Kubernetes slack channel and they provided me this project: https://github.com/kelseyhightower/kubernetes-the-hard-way
it's a documentation project on how to configure kubernetes the hard way, in the documentation they set it up in google cloud, but it's easy to understand what they did on cloud and how to configure the same on your network.
I have a 2-raspberry Pi 4 kubernetes Cluster. It uses k3s : (https://github.com/rancher/k3s) which is built on k8s 1.16.
I want to install k8s dashboard (https://github.com/kubernetes/dashboard)
However the last arm-compile image is the v1.10.1 which is not compatible with k8s-1.16 .
Is there a (un)official image of K8s dahsboard v2.0.0-betaX compiled for arm ?
Or someone had any tips on how to compile such an arm image ?
thanks in advance.
According to this article on docker blog docker supports multi platform images since September 2017.
Kubernetes dashboard images are already supporting multiple architectures so you don't need to build it by yourself.
Take a look at the image below.
You can use kubernetesui/dashboard tag and your docker daemon should pull appropriate image for your architecture.
Let me know if it helped.
I'm running the kafka kubenetes helm deployment, however I am unsure about how to install a custom plugin.
When running custom plugin on my local version of kafka I mount the volume /myplugin to the Docker image, and then set the plugin path environment variable.
I am unsure about how to apply this workflow to the helm charts / kubernetes deployment, mainly how to go about mounting the plugin to the Kafka Connect pod such that it can be found in the default plugin.path=/usr/share/java.
Have a look at the last few slides of https://talks.rmoff.net/QZ5nsS/from-zero-to-hero-with-kafka-connect. You can mount your plugins but the best way is to either build a new image to extend the cp-kafka-connect-base, or to install the plugin at runtime - both using Confluent Hub.
I'm new in kubernetes and I have some doubts about the installation of kubernetes on centos 7, I have read some documentation on some links:
https://kubernetes.io/docs/getting-started-guides/kubeadm/
https://kubernetes.io/docs/getting-started-guides/centos/centos_manual_config/
But I not undestanding which procedure to follow, on first link it show how to install it using kubeadm but at the end of the article on "Limitations" appear that this tool "is a work in progress and these limitations will be addressed in due course", on second link I need to have at least 2 machines, so my question is which is better to use if I will to install it like production.
Thanks in advance
kubeadm.
kubeadm now can support for multi masters, which is considerable for production.
The kubeadm also supplies a secure deployment. It automatically configs TLS settings or RBAC for the cluster, which is not included in the "manual installation page".
My advice: play kubeadm in your development environment first, so that you see how kubeadm deploys a Kubernetes cluster, many components can be deployed by Kubernetes itself. Then, you decide whether use it in your production.
You can follow up the repository made by one of our developer with an additional thing of Horizontal Pod autoscaling of stateless application.
https://github.com/vevsatechnologies/Install-Kubernetes-on-CentOs