kubectl | 易学教程

Restart container within pod

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I have a pod test-1495806908-xn5jn with 2 containers. I'd like to restart one of them called container-test . Is it possible to restart a single container within a pod and how? If not, how do I restart the pod? The pod was created using a deployment.yaml with: kubectl create -f deployment.yaml Is it possible to restart a single container Not through kubectl , although depending on the setup of your cluster you can "cheat" and docker kill the-sha-goes-here , which will cause kubelet to restart the "failed" container (assuming, of course, the restart policy for the Pod says that is what it

kubectl apply vs kubectl create?

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What I understood by the documentation is that kubectl apply = kubectl create + kubectl replace . Reference My understanding is that if I want create new k8s resource in the cluster I should use kubectl create operation. Now If I want to update something in a live k8s resources I should use kubectl replace operation. If I want to do both operations (create a new k8s resource as well as update the live k8s resources ) then I should use kubectl apply operation My questions are Why are there three operations for doing the same task in a cluster? What are the use cases for these operations? How do

Tell when Job is Complete

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I'm looking for a way to tell (from within a script) when a Kubernetes Job has completed. I want to then get the logs out of the containers and perform cleanup. What would be a good way to do this? Would the best way be to run kubectl describe job <job_name> and grep for 1 Succeeded or something of the sort? abagshaw Since version 1.11, you can do: kubectl wait --for=condition=complete job/myjob and you can also set a timeout: kubectl wait --for=condition=complete --timeout=30s job/myjob Eric Tune You can visually watch a job's status with this command: kubectl get jobs myjob -w The -w option

Define size for /dev/shm on container engine

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问题 I'm running Chrome with xvfb on Debian 8. It works until I open a tab and try to load content. The process dies silently... Fortunately, I have gotten it to run smoothly on my local docker using docker run --shm-size=1G . There is a known bug in Chrome that causes it to crash when /dev/shm is too small. I am deploying to Container engine, and inspecting the OS specs. The host OS has a solid 7G mounted to /dev/shm, but the actual container is only allocated 64M. Chrome crashes. How can I set

How to create a kubectl config file for serviceaccount

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问题 I have a kubernetes cluster on Azure and I created 2 namespaces and 2 service accounts because I have two teams deploying on the cluster. I want to give each team their own kubeconfig file for the serviceaccount I created. I am pretty new to Kubernetes and haven't been able to find a clear instruction on the kubernetes website. How do I create a kube config file for a serviceaccount? Hopefully someone can help me out :), I rather not give the default kube config file to the teams. With kind

kubectl apply vs kubectl create?

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问题 What I understood by the documentation is that kubectl apply = kubectl create + kubectl replace . Reference My understanding is that if I want create new k8s resource in the cluster I should use kubectl create operation. Now If I want to update something in a live k8s resources I should use kubectl replace operation. If I want to do both operations (create a new k8s resource as well as update the live k8s resources ) then I should use kubectl apply operation My questions are Why are there

How kubectl port-forward works?

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问题 kubectl expose commands can be used to create a service for the applications and assign an IP address to access it from internet. As far as I understand, to access any application within Kubernetes cluster there should be a service resource created and that should have an IP address which is accessible from external network. But in case of port-forward how kubectl creates an connection to the application without an IP address which is accessible externally? 回答1: kubectl port-forward makes a

Tell when Job is Complete

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问题 I\'m looking for a way to tell (from within a script) when a Kubernetes Job has completed. I want to then get the logs out of the containers and perform cleanup. What would be a good way to do this? Would the best way be to run kubectl describe job <job_name> and grep for 1 Succeeded or something of the sort? 回答1: Since version 1.11, you can do: kubectl wait --for=condition=complete job/myjob and you can also set a timeout: kubectl wait --for=condition=complete --timeout=30s job/myjob 回答2: