Nutanix Kubernetes Engine

Kubernetes Management Made Simple

  • 99 Topics
  • 288 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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99 Topics

Anibal Ulisses
Anibal UlissesTrailblazer
asked in Nutanix Kubernetes Engine

Manually adjust the kube-apiserver?

Hi, It’s possible to manually adjust the file /var/nutanix/etc/kubernetes/manifests/kube-apiserver.yaml and apply this update into the kubernetes cluster? I tried to adjust and after run: sudo systemctl daemon-reload && sudo systemctl restart kubelet-master But when I describe the kube-api pod I see that the adjusts are not applied. Anibal

19
Anibal Ulisses
3 years ago
aluciani
alucianiChevalier
asked in Nutanix Kubernetes Engine

Cool GitHub Project: Kubernetes and Nutanix

Cool GitHub project - Kubernetes installation tools for Nutanix. Give it a try and add your comments in this forum. I'm sure [url=http://next.nutanix.com/member/profile?mid=25525]RedDevil[/url] would like to hear your feedback. Download here: [url=https://github.com/nutanix/k8s]https://github.com/nutanix/k8s[/url]

17
R
4 years ago
aluciani
alucianiChevalier
posted in Nutanix Kubernetes Engine

[Docker] Nutanix Container Volume Plug-in

For those running Docker, check out > [url=http://dockr.ly/2lZ50Hw]Nutanix Container Volume Plug-in[/url] on the Docker store. Nutanix Volume Plugin enables container persistent storage. Try it out today and let me know your experience. [img]https://d1qy7qyune0vt1.cloudfront.net/nutanix-us/attachment/2548iF0A241E0F3BB3D7D.jpg[/img]

16
aluciani
5 years ago
clindevall
clindevallVoyager
posted in Nutanix Kubernetes Engine

Renewing cluster kubeconfig from the command line

Just wanted to share how we are renewing the kubeconfig from the command line. Background: In our organization it was considered a bit clumsy to download the kubeconfig from the Karbon UI. We love the command line and wanted a quick’n’easy way to renew the authentication token. The solution: We created a docker image that contains the “karbonctl” binary and a wrapper script. The Dockerfile was also included into our CI/CD pipeline to automate the image creation. The wrapper script does two things: karbonctl login --pc-ip prism.nightingale.nu --pc-username “$1” karbonctl cluster kubeconfig --cluster-name “$2” >”$3” The commands that the end user run: docker run --rm -it -v “$(pwd)”:/tmp docker.registry.local/karbonctl:latest <login> mycluster /tmp/karbon.cfg export KUBECONFIG=”$(pwd)/karbon.cfg”  

14
mikkisse
2 years ago
Anibal Ulisses
Anibal UlissesTrailblazer
asked in Nutanix Kubernetes Engine

Enable PodPreset

Hi, Someone know if we can enable PodPreset on the Karbon? (https://kubernetes.io/docs/concepts/workloads/pods/podpreset/#enable-pod-preset) Basically my cluster are under a Proxy and I can’t deploy application under Pod because they need to access the internet, with the PodPreset I can configure the proxy information like this https://docs.gitlab.com/ee/topics/autodevops/index.html#installing-helm-behind-a-proxy

12
Anibal Ulisses
3 years ago
K
KarangDikaTrailblazer
asked in Nutanix Kubernetes Engine

Failed to deploy kubernetes cluster (Failed to deploy ntnx dvp)

Hi,I’m trying to explore kubernetes by deploying Development Cluster. But it only stuck at 8% and eventually failed with notification (Internal Error : Failed to deploy ntnx dvp).Here is my detailSegment 192.168.2.x for Guest VM,PC,AOS and AHV. Segment 192.168.3.x for Kubernetes cluster itself (DHCP Enabled)Each segment can ping each other and all those segments are able to access the internet.Here is the detail of the temporary deployed Karbon VM (After failed deploying, the VM got deleted automatically)I’ve been reading someone posted same problem like mine, and it solved because of the VM previously unable to access the internet. But mine is able to access internet, PC and the Internal Nutanix.Perhaps someone can enlighten me what did i do wrong?-Able to pull newest docker image-Able to ping Prism Central (192.168.2.11)-Able to ping CVM (192.168.2.2)-Able to access internetDeploying Cluster stuck at 8%Deleting VM after failure deploymentNotification Internal Error : Failed to deploy

11
K
2 years ago
K
Keith33Adventurer
asked in Nutanix Kubernetes Engine

Karbon CSR Request Stuck in Approved State

Hello, After a new deployment, I downloaded the kubeconfig and upon trying to approve a Certificate Signing Request (CSR), the csr just sits in an approved state, but never becomes Issued. Is there a restriction or something on the default-kubernetes-<clustername> user that I might not be familiar with? That or maybe my process is wrong, its odd that it just sits in an Approved state. Any help is appreciated!

9
K
2 years ago
Jubran
Nutanix Employee
JubranNutanix Employee
posted in Nutanix Kubernetes Engine

How to setup and use Karbon

What is Karbon? Nutanix Karbon is a curated turnkey offering that provides simplified provisioning and operations of Kubernetes clusters. Kubernetes is an open source container orchestration system for deploying and managing container-based applications. The Karbon web console simplifies the deployment and management of Kubernetes clusters with a simple GUI and built-in event monitoring tools. There are built-in add-ons such as Kibana and Prometheus for parsing logs and monitoring alert triggering mechanism in you cluster. Using Karbon you can:  Deploy Kubernetes clusters. Use Nutanix Volumes and Nutanix Files storage for your applications. Manage Kubernetes cluster resources. Upgrade your Kubernetes deployment. Ensure high-availability. To set up your Karbon environment, perform the following tasks: Enable Karbon through Prism Central, Enabling Karbon Download an image, see OS Images Create clusters, see Creating a Cluster Download the kubeconfig, Downloading the Kubeconfig Configure

8
J
3 years ago
JoseNutanix
Nutanix Employee
JoseNutanixNutanix Employee
posted in Nutanix Kubernetes Engine

Kubernetes Dashboard on Nutanix Karbon

With the release of Nutanix Karbon TP, PC 5.9, you may want to deploy some of the traditional addons like [b]Kubernetes Dashboard with Heapster[/b]. This post walks you through the process to successfully deploy the Kubernetes Dashboard addon. Before you can start with the deployment of the addon you need a working Kubernetes cluster and the [b]kubectl[/b] CLI-tool. The steps to follow are: [list=1] [*]Deploy Heapster [*]Deploy Kubernetes Dashboard [*]Connect to Kubernetes Dashboard [/list] [h2]Deploying Heapster[/h2]From Heapster website: [i]Heapster enables Container Cluster Monitoring and Performance Analysis for Kubernetes (versions v1.0.6 and higher), and platforms which include it.[/i] [b][i]Heapster is deprecated[/i][/b][i]. Consider using metrics-server and a third party metrics pipeline to gather Prometheus-format metrics instead. See the[/i] [url=https://github.com/kubernetes/heapster/blob/master/docs/deprecation.md][i]deprecation timeline[/i][/url][i] fo

8
R
4 years ago
K
KeoNaaneAdventurer
asked in Nutanix Kubernetes Engine

Karbon Nodes TimeZone

Hi all  We have karbon clusters running in our Nutanix environment, and I noticed the timezone in the Karbon cluster is not the same as that in other VMs on the Nutanix cluster.  The time zone set for the Nutanix cluster is SAST (UTC +2), and the Karbon VMs timezone is UTC (UTC +0).  The UTC+0 timezone is only on the Karbon Nodes.  It seems it doesn’t use the Nutanix Cluster’s timezone, our logs are 2 hours behind on Karbon Clusters(all 3 cluster).  Is there a way to change the timezone for Karbon?  

8
AnishWalia20
Nutanix Employee
3 years ago
dlink7
dlink7Moderator
posted in Nutanix Kubernetes Engine

Monitor Your Apps with Epoch

Xi Epoch generates live application maps to provide instantaneous visibility into your application health without any code instrumentation. Epoch provides visibility into the interactions between components in distributed architectures, without dependency on specific language or framework implementation. As a result, operations team can quickly ensure reliability and availability of any application in any cloud environment. The picture below is showing two different Kubernetes Clusters, Docker Enterprise and Nutanix Karbon. The collectors are deployed as daemon sets so they can be deployed to any Kubernetes cluster to start monitoring your applications. Epoch collectors can be run in both containerized as well as non-containerized environments. Only one collector is needed per host (VM or bare metal OS). [img]https://d1qy7qyune0vt1.cloudfront.net/nutanix-us/attachment/8ddea191-55ab-4db0-a322-6ddeeedf91dc.png[/img] Below is YugaDB running Cassandra commands and Epoch is able to l

6
dlink7
4 years ago
MVerhaeghe
MVerhaegheVoyager
asked in Nutanix Kubernetes Engine

Karbon API Deployment - Autentification Error

Hi all,  I tried to deploy a Karbon Development Cluster by using Karbon API, but I encounter an error with authentication.    {"message_list":{"Unauthorized":"Failed to get authentication info"},"status_code":401} The command for calling Karbon API is :  curl -k -X POST -d @create-cluster-dev.json --header "Content-Type: application/json" --header "Accept: application/json" --user $NUTANIX_USER:$NUTANIX_USER_PASS "https://xxx.xxx.xxx.xxx:9440/karbon/acs/k8s/cluster"   When I try to use other Prism API command, like cluster or vm with these command below,, everything works fine, so I don’t think that my login/password are wrong. I haven’t seen much more into nutanix log file, but maybe i’m looking at the wrong place (/data/logs).  curl -k -X POST -d @nutanix-list-cluster.json --header "Content-Type: application/json" --header "Accept: application/json" --user $NUTANIX_USER:$NUTANIX_USER_PASS "https://xxx.xxx.xxx.xxx:9440/api/nutanix/v3/clusters/list"   Has anyone encountered th

6
AnishWalia20
Nutanix Employee
3 years ago
H
HongAdventurer
asked in Nutanix Kubernetes Engine

How to Karbon configure

I'm testing Karbon. I'm very basic level. I can't make it through the karbon configure testing, so I'll ask you for help. I've upgraded Karbon to the latest version through LCM. After that, I set it up through "Create Kubernets Cluster." That's the problem from here. In the end, an error occurs in the "Deployment Failed" status section. Deploying 8% has an error. I looked up various information. I looked it up, and I think you should setting Proxy http and ERCD. How can setting? Please explain in detail the reason why Karbon can't be distributed. Thank you.

6
seaton
4 years ago
Anibal Ulisses
Anibal UlissesTrailblazer
asked in Nutanix Kubernetes Engine

Use internal ca certificate chain on Karbon

Hi, My company have a internal CA certificate chain and I need to install the internal ca.crt on Karbon, it’s possible? Use case, install a pod using kubectl from a internal registry are not possible due they didn’t know the root CA authority installed at the registry server. Anibal

6
AnishWalia20
Nutanix Employee
3 years ago
Anibal Ulisses
Anibal UlissesTrailblazer
asked in Nutanix Kubernetes Engine

Karbon integration with GitLab

Hi, someone have experience integrating GitLab with Karbon? Basically I’m looking for automatic deployment from gitlab to karbon.

6
Anibal Ulisses
3 years ago
aluciani
alucianiChevalier
posted in Nutanix Kubernetes Engine

Containers vs Virtual Machines: Is there a difference?

Linux containers have been with us for a while, but companies like Docker have taken it to the mainstream in the last several years. For system administrators who manage virtual environments day to day, the introduction of containers from development teams may cause some anxiety.Should containers be treated differently, or do system administrator need to know when to deploy containers?Matt Hartley has recently published a good write up on it in Datamation.Article: Linux Containers vs Virtual MachinesOne of the first things to understand about containers vs. virtual machines is that containers are used for applications, and the virtual machines are designed for entire operating systems, and Matt mentions this in the article.You should try to keep containers to a single function.I also recently polled IT Pro's and asked if they have deployed containers yet and the vast majority said no.   Are you a virtualization administrator who is exploring the idea of containers? Do you currently hav

5
Justin-DynamicD
5 years 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
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 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
aluciani
alucianiChevalier
posted in Nutanix Kubernetes Engine

Kubernetes Volume Plug-In Overview

Nutanix provides an external volume plug-in for Kubernetes. Kubernetes is an open source platform for automating deployment, scaling, and operation of application containers across a cluster of hosts. This cluster of hosts can be made up of cloud provider VM instances, Nutanix-hosted VMs, or bare metal servers. Kubernetes is formed with multiple VMs and a master node. This plug-in runs in a pod and dynamically provisions requested persistent volume that is compatible with the Kubernetes iSCSI volume. Nutanix then provides persistent storage for the provisioned volume. Storage classes also have provisioners which determine which volume plugin should be used for provisioning Persistent Volumes. Read more about it [url=http://bit.ly/2FhFvcg]here[/url] Try the Kubernetes Volume Plug-In with CE 5.5

5
W
5 years ago
G
gael01Trailblazer
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
10 months ago
W
wfhartfordVoyager
asked in Nutanix Kubernetes Engine

Storage Class User for Karbon

I'm trying to configure a new Kubernetes cluster using Karbon. When I get to the stage of configuring the storage class, I'm prompted for a user name and password. I'm not sure which user I should be entering here, as the few I've tried don't seem to work. The cluster setup tutorial video shows the username `admin`, which seems to suggest using a very highly privileged user, which seems unnecessary to me. How can I create a user with the minimum privileges necessary for the storage class?

5
vshuguet
Nutanix Employee
4 years ago
K
KeoNaaneAdventurer
asked in Nutanix Kubernetes Engine

NCC Checks - Volume Groups

Hi all When doing NCC checks, I get a report(example1) that some volume groups usage is high (95%). example1: Detailed information for vg_space_usage_check: Node 10.x.x.x: FAIL: Volume Group pvc-xxxxxx-9xxx-11x9-bf59-xxxxx8d87c391 space usage (95 %) above 90 % _ The volume group is mounted to Kubernetes pod running in a Karbon cluster. My issue is that, when checking usage of the volume group from within the kubernetes pod, I get different usage results, current stats are 24% used, 76% free. The NCC check and the manual check results don't match. NOTE: There is a clean-up mechanism, so disk usage does go up and down. I have re-ran the ncc checks several times, they yield the same stats (95% usage), thou the usage from the pod is 24%(currently). Can you please elaborate on how the NCC vg_space_usage_check work? And what else to look at to further investigate the mismatch of stats. Tx

5
dlink7
4 years ago
aluciani
alucianiChevalier
posted in Nutanix Kubernetes Engine

Nutanix DVP (Docker Volume Plug-in)

Earlier in the year we shared our Nutanix Docker Volume Plugin on the Docker store. The Nutanix Docker Volume Plugin (DVP) enables Docker Containers to use storage persistently. Normally, if a container is moved from one container machine to another, storage does not move with it. The Acropolis Container Services (ACS) provide a storage volume plugin that enables Docker deployments to be integrated with Nutanix external storage systems and enable data volumes to persist beyond the lifetime of a single container machine host. You can find it here: [url=https://tr.im/22PKN]Nutanix DVP (Docker Volume Plug-in)[/url] Hit REPLY and share your experience with others in the community!

4
S
5 years ago
J
jrackVanguard
asked in Nutanix Kubernetes Engine

Is Nutanix working with the Container Storage Interface (CSI) community and Kubernetes in general?

Beyond simple docker volume support but can Nutanix bring their expertise into the CSI space to make orchestration systems like k8s aware of cluster wide storage resources? It also leads into what Nuatnix is doing to enable a K8s API conformant solution on top of the platform. I recognize that we can layer on a k8s runtime as a customer, but similar to what we see with Pivotal leveraging BOSH to make day2 k8s work there seems to be demand for integrated options. The institutional storage knowledge could really take stateful sets to the next level and BOSH as a lot of similarities to Acropolis. I know that there may be overlap with Calm when it comes to service orchestration, but k8s is becoming the defacto language for orchestrating an application delivered by containers.

4
A
Nutanix Employee
4 years ago

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