k9s | 🐶 Kubernetes CLI To Manage Your Clusters In Style | Identity Management library

 by   derailed Go Version: v0.27.4 License: Apache-2.0

kandi X-RAY | k9s Summary

kandi X-RAY | k9s Summary

k9s is a Go library typically used in Security, Identity Management applications. k9s has no bugs, it has no vulnerabilities, it has a Permissive License and it has medium support. You can download it from GitHub.

K9s provides a terminal UI to interact with your Kubernetes clusters. The aim of this project is to make it easier to navigate, observe and manage your applications in the wild. K9s continually watches Kubernetes for changes and offers subsequent commands to interact with your observed resources.

            kandi-support Support

              k9s has a medium active ecosystem.
              It has 21127 star(s) with 1355 fork(s). There are 144 watchers for this library.
              There were 1 major release(s) in the last 12 months.
              There are 398 open issues and 1050 have been closed. On average issues are closed in 146 days. There are 48 open pull requests and 0 closed requests.
              It has a neutral sentiment in the developer community.
              The latest version of k9s is v0.27.4

            kandi-Quality Quality

              k9s has 0 bugs and 0 code smells.

            kandi-Security Security

              k9s has no vulnerabilities reported, and its dependent libraries have no vulnerabilities reported.
              k9s code analysis shows 0 unresolved vulnerabilities.
              There are 0 security hotspots that need review.

            kandi-License License

              k9s is licensed under the Apache-2.0 License. This license is Permissive.
              Permissive licenses have the least restrictions, and you can use them in most projects.

            kandi-Reuse Reuse

              k9s releases are available to install and integrate.
              Installation instructions, examples and code snippets are available.

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            k9s Key Features

            No Key Features are available at this moment for k9s.

            k9s Examples and Code Snippets

            No Code Snippets are available at this moment for k9s.

            Community Discussions


            Unable to exec command into kubernetes pod
            Asked 2022-Mar-21 at 21:45

            Python version 3.8.10 Kubernetes version 23.3.0

            I'm trying to run a command into a specific pod in kubernetes using python. I've tried to reduce the code as much as I could, so I'm running this.



            Answered 2022-Mar-21 at 21:45

            Yes, this official guide says that you should use resp = **stream**(api.connect_get_namespaced_pod_exec(name, ... instead.

            So you have to edit your code like this:

            Source https://stackoverflow.com/questions/71531543


            Airflow BashOperator - Use different role then its pod role
            Asked 2022-Jan-12 at 08:24

            I've tried to run the following commands as part of a bash script runs in BashOperator:



            Answered 2022-Jan-11 at 19:48

            Reviewing the BashOperator source code, I've noticed the following code:


            Source https://stackoverflow.com/questions/70672600


            How do I navigate to next filter/search item in k9s?
            Asked 2021-Nov-21 at 05:07

            When there's more than one search result from / filter command, how do you navigate to next item? Basically I'm looking for F3 (next search result) equivalent in k9s. Commands listed here does not seem to include what I'm looking for...



            Answered 2021-Nov-21 at 05:07

            Ok try your problem I created dummy 100 pods (2 deployments) in my local cluster :). 50 named test-deployment. 50 named test1-deployment. Used k9s to search with /test? and I noticed a mix of pods came up. To go further in list, donot forget to press enter key once you see your results and then you can use usual navigation like arrow keys or pgdn/pgup keys to move around the result.

            Source https://stackoverflow.com/questions/70045899


            Failing to run Mattermost locally on a Kubernetes cluster using Minikube
            Asked 2021-Oct-15 at 12:44

            Summary in one sentence

            I want to deploy Mattermost locally on a Kubernetes cluster using Minikube

            Steps to reproduce

            I used this tutorial and the Github documentation:

            1. To start minikube: minikube start --kubernetes-version=v1.21.5
            2. To start ingress; minikube addons enable ingress
            3. I cloned the Github repo with tag v1.15.0 (second link)
            4. In the Github documentation (second link) they state that you need to install Custom Resources by running: kubectl apply -f ./config/crd/bases
            5. Afterwards I installed MinIO and MySQL operators by running: make mysql-minio-operators
            6. Started the Mattermost-operator locally by running: go run .
            7. In the end I deployed Mattermost (I followed step 2, 7 and 9 from the first link)

            Observed behavior

            Unfortunately I keep getting the following error in the mattermost-operator:



            Answered 2021-Oct-15 at 12:44

            As @Ashish faced the same issue, he fixed it by upgrading the resources.

            Minikube will be able to run all the pods by running minikube start --kubernetes-version=v1.21.5 --memory 4000 --cpus 4

            Source https://stackoverflow.com/questions/69570881


            How to send the logs from kubernetes pod to host pc
            Asked 2021-Jun-08 at 12:30

            I use k9s to access the bash from the pod where I keep the logs of my project.

            Reading the logs with a cat is annoying, so I want to send them to my pc.

            How can I do this?



            Answered 2021-Jun-08 at 12:30

            You can use kubectl cp command.

            kubectl cp default/:/logs/app.log app.log

            Source https://stackoverflow.com/questions/67886830


            Checking kubernetes pod CPU and memory without using third party tool
            Asked 2021-Apr-12 at 14:25

            I followed the first possible solution in this page: Checking kubernetes pod CPU and memory

            I tried the command:

            kubectl exec pod_name -- /bin/bash

            But it didn't work therefore I tried the command:

            kubectl exec -n [namespace] [pod_name] -- cat test.log

            I know this because when I run the command:

            kubectl get pods --all-namespaces | grep [pod_name]

            This is what I see:


            But I get this error message:



            Answered 2021-Apr-07 at 08:27

            The most straight forward way to see your pod's cpu and memory usage is by installing the metrics server, and then using kubectl top pods or kubectl top pod .

            The metrics server's impact on the cluster is minimal and it will help you monitor your cluster.

            The answer in the SO post you linked seems like an hack to me and definitely not the usual way of monitoring your pod resource usage.

            Source https://stackoverflow.com/questions/66980808


            How to get cpu and memory usage of nodes/pods in prometheus?
            Asked 2021-Feb-09 at 21:32

            As beginener, I have tried k9s and kubernetes 'kubectl top nodes',for the cpu and memory usage and values are matched.Meanwhile I tried with prometheus UI, with 'avg(container_cpu_user_seconds_total{node="dev-node01"})' and 'avg(container_cpu_usage_seconds_total{node="dev-node01"})' for dev-node01. I cant get matching values.Any help will be appreciated as I am beginner.please any help would be appreciated.



            Answered 2021-Feb-05 at 06:37

            if metrics 'container_cpu_user_seconds_total' showing output then it should work. I used the same query which you mentioned above and it's working for me. Check the graph and console tab as well in Prometheus.

            Please try this

            Source https://stackoverflow.com/questions/66057517


            Kubernetes - is Service Mesh a must?
            Asked 2021-Jan-28 at 03:38

            Recently I have built several microservices within a k8s cluster with Nginx ingress controller and they are working normally.

            When dealing with communications among microservices, I attempted gRPC and it worked. Then I discover when microservice A -> gRPC -> microservice B, all requests were only occurred at 1 pod of microservice B (e.g. total 10 pods available for microservice B). In order to load balance the requests to all pods of microservice B, I attempted linkerd and it worked. However, I realized gRPC sometimes will produce internal error (e.g. 1 error out of 100 requests), making me changed to using the k8s DNS way (e.g. my-svc.my-namespace.svc.cluster-domain.example). Then, the requests never fail. I started to hold up gRPC and linkerd.

            Later, I was interested in istio. I successfully deployed it to the cluster. However, I observe it always creates its own load balancer, which is not so matching with the existing Nginx ingress controller.

            Furthermore, I attempted prometheus and grafana, as well as k9s. These tools let me have better understanding on cpu and memory usage of the pods.

            Here I have several questions that I wish to understand:-

            1. If I need to monitor cluster resources, we have prometheus, grafana and k9s. Are they doing the same monitoring role as service mesh (e.g. linkerd, istio)?
            2. if k8s DNS can already achieve load balancing, do we still need service mesh?
            3. if using k8s without service mesh, is it lag behind the normal practice?

            Actually I also want to use service mesh every day.



            Answered 2021-Jan-27 at 06:06

            The simple answer is

            Service mesh for a kubernetes server is not necessary

            Now to answer your questions

            If I need to monitor cluster resources, we have prometheus, grafana and k9s. Are they doing the same monitoring role as service mesh (e.g. linkerd, istio)?

            K9s is a cli tool that is just a replacement to the kubectl cli tool. It is not a monitor tool. Prometheus and grafana are monitoring tools that will need use the data provided by applications(pods) and builds the time-series data which can be visualized as charts, graphs etc. However the applications have to provide the monitoring data to Prometheus. Service meshes may use a sidecar and provide some default metrics useful for monitoring such as number of requests handled in a second. Your application doesn't need to have any knowledge or implementation of the metrics. Thus service meshes are optional and it offloads the common things such as monitoring or authorization.

            if k8s DNS can already achieve load balancing, do we still need service mesh?

            Service meshes are not needed for load balancing. When you have multiple services running in the cluster and want to use a single entry point for all your services to simplify maintenance and to save cost, Ingress controllers such as Nginx, Traefik, HAProxy are used. Also, service meshes such as Istio comes with its own ingress controller.

            if using k8s without service mesh, is it lag behind the normal practice?

            No, there can be clusters that don't have service meshes today and still use Kubernetes.

            In the future, Kubernetes may bring some functionalities from service meshes.

            Source https://stackoverflow.com/questions/65913552


            Unnesting Node database calls
            Asked 2020-Dec-07 at 12:36

            I have an ordinary



            Answered 2020-Oct-21 at 13:40

            If your database calls returned promises instead of using callbacks, you could:

            Source https://stackoverflow.com/questions/64464555


            'Kubelet stopped posting node status' and node inaccessible
            Asked 2020-Sep-09 at 09:48

            I am having some issues with a fairly new cluster where a couple of nodes (always seems to happen in pairs but potentially just a coincidence) will become NotReady and a kubectl describe will say that the Kubelet stopped posting node status for memory, disk, PID and ready.

            All of the running pods are stuck in Terminating (can use k9s to connect to the cluster and see this) and the only solution I have found is to cordon and drain the nodes. After a few hours they seem to be being deleted and new ones created. Alternatively I can delete them using kubectl.

            They are completely inaccessible via ssh (timeout) but AWS reports the EC2 instances as having no issues.

            This has now happened three times in the past week. Everything does recover fine but there is clearly some issue and I would like to get to the bottom of it.

            How would I go about finding out what has gone on if I cannot get onto the boxes at all? (Actually just occurred to me to maybe take a snapshot of the volume and mount it so will try that if it happens again, but any other suggestions welcome)

            Running kubernetes v1.18.8



            Answered 2020-Sep-08 at 08:20

            There are two most common possibilities here, both most likely caused by a large load:

            • Out of Memory error on the kubelet host. Can be solved by adding proper --kubelet-extra-args to BootstrapArguments. For example: --kubelet-extra-args "--kube-reserved memory=0.3Gi,ephemeral-storage=1Gi --system-reserved memory=0.2Gi,ephemeral-storage=1Gi --eviction-hard memory.available<200Mi,nodefs.available<10%"

            • An issue explained here:

            kubelet cannot patch its node status sometimes, ’cos more than 250 resources stay on the node, kubelet cannot watch more than 250 streams with kube-apiserver at the same time. So, I just adjust kube-apiserver --http2-max-streams-per-connection to 1000 to relieve the pain.

            You can either adjust the values provided above or try to find the cause of high load/iops and try to tune it down.

            Source https://stackoverflow.com/questions/63759047

            Community Discussions, Code Snippets contain sources that include Stack Exchange Network


            No vulnerabilities reported

            Install k9s

            K9s is available on Linux, macOS and Windows platforms.
            Binaries for Linux, Windows and Mac are available as tarballs in the release page.
            Via Homebrew for macOS or LinuxBrew for Linux brew install k9s
            Via MacPorts sudo port install k9s
            On Arch Linux pacman -S k9s
            On OpenSUSE Linux distribution zypper install k9s
            Via Scoop for Windows scoop install k9s
            Via Chocolatey for Windows choco install k9s
            Via a GO install # NOTE: The dev version will be in effect! go get -u github.com/derailed/k9s
            Via Webi for Linux and macOS curl -sS https://webinstall.dev/k9s | bash
            Via Webi for Windows curl.exe -A MS https://webinstall.dev/k9s | powershell


            Please refer to our K9s documentation site for installation, usage, customization and tips.
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