Nutanix Kubernetes Engine

Kubernetes Management Made Simple

  • 98 Topics
  • 287 Replies

Backing Up Karbon Kubernetes clusters with Velero and Nutanix Objects

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Latest Nutanix Karbon How-To Videos

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Tillerless Helm on Nutanix Karbon

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98 Topics

A
AmineBiExplorer
asked in Nutanix Kubernetes Engine

calico pods does not started

Hello,I got an issue with calico pods:Warning  Unhealthy  9m53s (x3 over 10m)  kubelet, karbon  Liveness probe failed: calico/node is not ready: bird/confd is not live: Service bird is not running. Output << down: /etc/service/enabled/bird: 0s, normally up, want up >>  Warning  Unhealthy  7m3s (x12 over 10m)  kubelet, karbon-  Liveness probe failed: calico/node is not ready: bird/confd is not live: Service bird is not running. Output << down: /etc/service/enabled/bird: 1s, normally up, want up >>  Warning  Unhealthy  2m3s (x50 over 10m)  kubelet, karbon-  Readiness probe failed: calico/node is not ready: BIRD is not ready: Error querying BIRD: unable to connect to BIRDv4 socket: dial unix /var/run/calico/bird.ctl: connect: connection refused I tried different workarounds:increasing scan time from 2 to 10 then 20. Modify the “IP_AUTODETECTION_METHOD=interface” from eth.* to eth0/eth1/ens.*But no luck, Would you have any suggestions to resolve the issue.Thanks.

0
A
1 month ago
R
Raph123Voyager
asked in Nutanix Kubernetes Engine

Disable or Reinstall Advanced Kubernetes Management on PC after cluster deleted

HelloI wanted to test Advanced Kubernetes Management but unfortunately I didn't understand how it works and I deleted my cluster on which I had activated it. Now I can't create a new cluster because I have an api error that is unreachable (this is normal since my cluster was deleted). Is it possible to reinstall properly on a new cluster or to disable it completely ? Thanks

3
R
2 months ago
P
PerhVoyager
asked in Nutanix Kubernetes Engine

NGT tools for Karbon

Is there any reason or use of installing NGT Tools on k8s “vm/node”?

2
P
4 months ago
G
gael01Adventurer
asked in Nutanix Kubernetes Engine

Ansible K8s cluster deployment failed to deploy the ntnx dvp

Hi guys,Currently working on Ansible  to deploy K8s clusters through Karbon and i got a fatal issue.Ansible is version core 2.12.9, PC is 2022.1, nutanix.ncp collection has been tested in version 1.6.0 and 1.7.0 and there’s absolutely no traffic denied between ansible and PC (to sum up, everything is opened). I use this playbook, based on example provided in ansible-doc (i also tried the example, and i got the same errors in any cases) ###EDIT : i can’t add code in this post, got a banner Something gone wrong everytime ### Here’s the logs when the playbook fails (after ~5min running, from PC, ETCD deployment get stuck at 8%) :  ###EDIT : i can’t add code in this post, got a banner Something gone wrong everytime ###Moreover, K8s cluster deployment through PC GUI is working smoothly. Does anyone got an idea to fix the “failed to deploy ntnx dvp” error ?  Thanks a lot :)  Gael

1
G
5 months ago
G
gael01Adventurer
asked in Nutanix Kubernetes Engine

Karbon and Prism Central Management for K8s Cluster

HiI’m currently working on RBAC rights for Prism Central but also for entities (VM,Apps...)In my understanding and in the documentation, i saw that you have to be User Admin on PC to get full rights on K8s cluster. In that statement, how does Karbon acts on K8s cluster rights while it deploy a new cluster ? (For instance, if you are a Viewer on PC you can’t connect to K8s cluster, if you’re User Admin, you can do whatever you want. ) Best regards Gael

5
mikkisse
6 months ago
G
gael01Adventurer
asked in Nutanix Kubernetes Engine

qqq

error from my side, please delete this post, sorry

0
G
6 months ago
aluciani
alucianiChevalier
posted in Nutanix Kubernetes Engine

Accelerating Enterprise Adoption of Kubernetes With Nutanix

“Kubernetes deployments are inherently dynamic and challenging to manage at scale,” said Thomas Cornely, SVP, Product Management, Nutanix. “Running Kubernetes container platforms cost-effectively at large scale requires developer-ready infrastructure that seamlessly adapts to changing requirements. Our expertise in simplifying infrastructure management while optimizing resourcesーboth on-premises and in the public cloudーis now being applied to help enterprises adopt Kubernetes more quickly. The Nutanix Cloud Platform now supports a broad choice of Kubernetes container platforms, provides integrated data services for modern applications, and enables developers to provision Infrastructure as Code.”According to Gartner, by 2027, 25% of all enterprise applications will run in containers, an increase from fewer than 10% in 2021. This is a significant challenge for many given most Kubernetes solutions are not meant to support enterprise scale, even less can do so in a manner that is cost effe

0
aluciani
7 months ago
aluciani
alucianiChevalier
posted in Nutanix Kubernetes Engine

Adding GPUs to Nutanix Kubernetes Engine Node Pools

Learn how to add GPUs to Nutanix Kubernetes Engine (NKE) node pools for running AI/ML workloads in the latest instalment of the AHV Mission Control Series. 

0
aluciani
7 months ago
A
ASHISHREDDYVoyager
asked in Nutanix Kubernetes Engine

Upgrade kubernetes version from 1.20.x to 1.21.x

Hello , I have a kubernetes Cluster on Nutanix with 1 Master Node and 2 Worker Nodes(Test ENV). All the Nodes have Kubernetes version of 1.20.x. I want to Update the all the Nodes kubernetes version to 1.21.x. without the Downtime of application/services running on it.  I have Seen in Nutanix guide which is easy step to upgrade kubernetes version but it says application may have downtime. Any Ideas and Inputs to upgrade Kubernetes version from 1.20.x to 1.21.x withoutdown of apps.

3
J
9 months ago
B
BhavenWayfarer
asked in Nutanix Kubernetes Engine

Karbon Kubernetes version upgrade and OS image

I have Community Edition and I can only see "ntnx-0.5" image due to which I am stuck at Kubernetes v1.16. (Karbon 2.0.2). My objective is to upgrade Kubernetes to 1.17 or 1.8. LCM does not display any software to upgrade.I have uploaded one more image "1.0" under images in PC as below - which I understand is 1st step before K8S upgrade. However, I cant not get ntnx-1.0 image under Karbon download Could someone please advise on this? Thanks 

2
K
11 months ago
V
VaccanoAdventurer
asked in Nutanix Kubernetes Engine

Update on Windows support for Karbon

I would like to know if support for Windows nodes has made any progress toward being prioritized for Karbon.We run a product called OutSystems and would like to move that workload to Nutanix Karbon.  But OutSystems containers only work with Windows Nodes.  I asked this question a year ago and was told that it was on the backlog.Could someone from the Karbon product team provide an update on the backlog item to support Windows Nodes in a Karbon based Kuberentes cluster?

0
V
1 year ago
X
xiaoweivip2020Wayfarer
asked in Nutanix Kubernetes Engine

Nutanix Volume Driver the Nutanix Docker Volume Plugin

There are many words about plugin making me confused. like the Nutanix Volume Driver 、the Nutanix Docker Volume Plugin、volume driver pluginDoes  anyone know the difference of this ? 

0
X
1 year ago
T
Theo BotVoyager
asked in Nutanix Kubernetes Engine

Karbon Kubernetes CronJob

When I run the command “kubctl api-resources”, I get a list of all available resources types. This list includes the CronJob type in the apigroup batch. However, when I want to deploy a cronjob I get the message: no matches for kind “CronJob” in version “batch/v1”.apiVersion: batch/v1kind: CronJobmetadata:  name: devel-sched  namespace: develDoes anybody know, how to fix this?

1
T
1 year ago
B
bandradeshipaVoyager
asked in Nutanix Kubernetes Engine

Karbon cluster IP

Hello folks!I just signed up for a SaaS test of Nutanix Karbon. After creating the cluster and downloading the kubeconfig, I see it gives me an IP 172.31.x.x:443 After downloading the kubeconfig file and running a kubectl get nodes, it times out because it can’t reach the cluster IPWhat should I do in order to expose the cluster IP and try installing/running our applications on Karbon?

3
JoseNutanix
Nutanix Employee
1 year ago
B
BhavenWayfarer
asked in Nutanix Kubernetes Engine

Kubernetes Version Upgrade and OS Image

Hi All,I have Community Edition and I can only see "ntnx-0.5" image due to which I am stuck at Kubernetes v1.16. (Karbon 2.0.2). My objective is to upgrade Kubernetes to 1.17 or 1.8. LCM does not display any software to upgrade.I have uploaded one more image "1.0" under images in PC as below - which I understand is 1st step before K8S upgrade. However, I cant not get ntnx-1.0 image under Karbon download Could someone please advise on this? Thanks  

0
B
1 year ago
AllenLiu
AllenLiuTrailblazer
asked in Nutanix Kubernetes Engine

Can't Download Karbon "Centos Image" on Nutanix CE

We want to test Nutanix's Karbon, when I click the download centos button, nothing happens.

5
AllenLiu
1 year ago
Y
YongjuVoyager
asked in Nutanix Kubernetes Engine

karbon install

If you check the carbon setting document on the Nutanix homepage, it is as follows.https://portal.nutanix.com/page/documents/details?targetId=Karbon-v2_2:kar-karbon-airgap-deploy-t.html  There is a WEB server (192.168.100.99) and prism central (192.168.100.45) that allow you to download carbon files by following the above method. When entering the command in Prism central CLI, it was successfully confirmed, but when checking in Prism central WEB, it is confirmed as tasks fail.Please tell me another way after confirmation ASAP 

1
JoseNutanix
Nutanix Employee
1 year ago
Y
YongjuVoyager
asked in Nutanix Kubernetes Engine

Karbon licensing

 I understand that the Nutanix Karbon License is free to use.I have an AOS Pro License, but the OS image cannot be downloaded because of the error below.Please guide me on how to solve it.Thank you.

5
JoseNutanix
Nutanix Employee
1 year ago
E
eriklundPathfinder
asked in Nutanix Kubernetes Engine

Karbon: Customize kube-let reserved memory

Karbon always allocates 400MB for kube-let and other node resources. However, this is not always enough and kube-let can run out-of-memory when system is under load.When kube-let runs out of memory then we get pods stranded in “Terminating” state and we have to reboot the node. What I did expect was the kube-let terminated pods that got out-of-memory and that kube-let would not run out of memory.Typical 1-1.4MB are reserved at nodes with 16GB memory in other Kubernetes clusters (EKS/AKS/GKE/...)See alsohttps://kubernetes.io/docs/tasks/administer-cluster/reserve-compute-resources/Currently we have added extra nodes and hope that we will not get out-of-memory on any nodes. However, that is not what Kubernetes is designed. Any work-a-round for adjusting the 400MB fixed size reservation?

1
crisj
Nutanix Employee
1 year ago
I
IgorStankovicAdventurer
asked in Nutanix Kubernetes Engine

How can I add a SAN to the Kubernetes API certificate?

Having deployed a new Kubernetes cluster with Karbon and downloaded the kubeconfig, kubectl operations result in an error:Unable to connect to the server: x509: certificate is valid for cluster.local, kubernetes, kubernetes.default, kubernetes.default.svc, kubernetes.default.svc.cluster, kubernetes.default.svc.cluster.local, cluster.local, not xxxxx What is the recommended way to add a SAN to the Karbon Kubernetes API certificate?

1
JoseNutanix
Nutanix Employee
1 year ago
I
IgorStankovicAdventurer
asked in Nutanix Kubernetes Engine

Deployment issue with Karbon 2.3 and Calico CNI

Hi there,It seems that I have a failure near the very end of deployment. Here is the output from karbon_core.out2021-10-17T11:57:31.052Z kube_prometheus.go:1016: [DEBUG] [k8s_cluster=RGS-PA-K8-CLUSTER-STAGING] expecting 5 nodes to be running calico-node daemon pod in kube-system namespace. Currently running: 42021-10-17T11:57:33.093Z kube_prometheus.go:1016: [DEBUG] [k8s_cluster=RGS-PA-K8-CLUSTER-STAGING] expecting 5 nodes to be running calico-node daemon pod in kube-system namespace. Currently running: 42021-10-17T11:57:35.135Z kube_prometheus.go:1016: [DEBUG] [k8s_cluster=RGS-PA-K8-CLUSTER-STAGING] expecting 5 nodes to be running calico-node daemon pod in kube-system namespace. Currently running: 42021-10-17T11:57:36.806Z calico.go:552: [ERROR] [k8s_cluster=RGS-PA-K8-CLUSTER-STAGING] Failed to verify calico addon2021-10-17T11:57:36.806Z k8s_deploy.go:1478: [ERROR] [k8s_cluster=RGS-PA-K8-CLUSTER-STAGING] Failed to deploy calico/flannel: Failed to deploy calico: Failed to verify calico

5
I
1 year ago
M
Moises S FAdventurer
asked in Nutanix Kubernetes Engine

Cluster Docker swarm + Volume Plugin

Hi, I have performed tests of the plugin for integration between Volume Groups in a Nutanix cluster with Dockers containers (https://next.nutanix.com/karbon-kubernetes-orchestration-30/nutanix-dvp-docker-volume-plug-in-25371) and (https://next.nutanix.com/karbon-kubernetes-orchestration-30/docker-nutanix-container-volume-plug-in-18726). While reading the Docker Volume Plugin documentation at (https://portal.nutanix.com/page/documents/solutions/details?targetId=BP-2037-Docker-Containers-on-AHV:BP-2037-Docker-Containers-on-AHV), I did not notice if such a plugin works with Docker containers in swarm mode (Docker swarm cluster). I performed some tests with Ubuntu 20.04, forming a Docker swarm cluster with 03 nodes, all VMs with Nutanix Guest Tools installed.  All the tests using .yml files for the creation of stacks and services, as for the volumes the tests were made both with the command to create the volumes, as well as in the .yml files. I noticed that the volumes are created normally

1
JoseNutanix
Nutanix Employee
1 year ago
J
jourosScout
asked in Nutanix Kubernetes Engine

Airgap for K8s external components

Is it possible to use Airgap to store additional K8s components like Flux, Ingress controller etc.? I’m using terraform to deploy Karbon, so I should be able to access airgap registry from those deployment modules. How do I manage airgap registry, is it standard private container registry? How about helm charts, can airgap registry store them also? 

0
J
1 year ago
M
Moises S FAdventurer
asked in Nutanix Kubernetes Engine

Karbon, Rancher and similars

Hello friends,From what I have read in the Karbon documentation, as well as from YouTube videos, through karbon in AHV I cannot manage aspects of the containers, the applications themselves, load balancing, reverse proxy, container images, etc. Is that right?Associated with this, if Karbon does not in fact have such features, is it possible to use Karbon in conjunction with tools that have the above features, like Rancher? Has anyone had this experience?

1
JoseNutanix
Nutanix Employee
1 year ago
R
RanuAdventurer
asked in Nutanix Kubernetes Engine

Kubernetes Cluster deployment failing

We have enable karbon on a 3-node nutanix cluster but kubernetes deployment is failing with below error. Any ideas?2021-04-06T07:58:33.103Z k8s_deploy.go:167: [error] [k8s_cluster=Ranu-Demo] failed to create worker node pool and deploy worker nodes(VMs): failed to deploy K8s cluster: failed to deploy worker nodes: Operation timed out2021-04-06T07:58:33.103Z k8s_deploy.go:882: [error] [k8s_cluster=Ranu-Demo] Error seen in configuring worker node: "Operation timed out"2021-04-06T07:58:33.125Z k8s_lib_deploy_task.go:113: [error] [k8s_cluster=Ranu-Demo] failed to deploy K8s cluster: failed to create worker node pool and deploy worker nodes(VMs): failed to deploy K8s cluster: failed to deploy worker nodes: Operation timed out2021-04-06T07:58:33.125Z k8s_lib_deploy_task.go:78: [info] [k8s_cluster=Ranu-Demo] token refresher received stopRefresh2021-04-06T07:58:36.03Z deploy_k8s_task.go:365: [error] [k8s_cluster=Ranu-Demo] Cluster Ranu-Demo:failed to deploy K8s cluster: failed to create worker

1
maaz
Nutanix Employee
1 year ago

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