kubernetes pod

first, the core concept 1, Node node as a working node in a cluster, running a real application, the smallest unit of Kubernetes managed on node is pod. Node runs kubernetes kubelet, Kube-proxy service processes that are responsible for pod creation, start-up, monitoring, restart, destruction, and load balancing of s

docker. $ Sudo apt-y install docker. io Apply flannel to the docker Network Modify the systemd configuration file of docker. $ Sudo mkdir/lib/systemd/system/docker. service. d $ Sudo vim/lib/systemd/system/docker. service. d/flannel. conf [Service] EnvironmentFile =-/run/flannel/docker Restart the docker service. $ Sudo systemctl daemon-reload $ Sudo systemctl restart docker Check whether docker has a flannel network. $ Sudo ps-ef | grep docker Root 11285 1? 00:00:01/usr/bin/dockerd-H fd: // --

ClusterCluster is a collection of compute, storage, and network resources, and Kubernetes uses these resources to run various container-based applicationsMasterMaster is the brain of cluster, whose primary responsibility is scheduling, that is, deciding where the application will run. Master runs the Linux operating system, which can be either a physical machine or a virtual machine. To achieve high availability, you can run multiple master.NodeNode's

service designed by the CoreOS team for kubernetes, which simply means that the Docker container created by the different node hosts in the cluster has a unique virtual IP address for the complete cluster. It also creates an overlay network between these IP addresses, which, through this overlay network, passes the packets intact to the target container (Overlay).Here is a schematic diagram of its network:As you can see, flannel first creates a bridg

Reprint: Http://www.jianshu.com/p/a977c0a03bf4 Introduction:Many people start using cocodpods and think that pod install is just the first time you use Cocoapods to build a project, and then you use Pod Update, but it's not actually the case.In simple terms, it is:1. Install a new library using pod install, even if you have podfile in your project and have alread

Use the pod trunk release program to make your project accessible by the pod search, podtrunkUse pod trunk to publish a program The integration and use of CocoaPods has been mentioned before, and there are indeed a lot of conveniences for pods integration and management of the third-party framework. Here we will not talk about the advantages. There are a lot of

the CNM.Next, we introduce the concept of network and the principle of communication in kubernetes.In Kubernetes's network model, three basic constraints are agreed: All containers can communicate with each other directly by IP without snat. All hosts and containers can communicate with each other directly by IP without snat. The container sees its own IP as the container IP that other containers see. On the basis of satisfying the constraint,

First, the prefaceKubernetes is Google's Open source container cluster management system, based on Docker to build a container scheduling services, providing resource scheduling, equalization disaster tolerance, service registration, dynamic expansion capacity and other functional kits, the latest version of the current 0.6.2. This article describes how to build a Kubernetes platform based on Centos7.0, before the formal introduction, it is necessary

本身的维护; 而kubernetes实际上也是状态的维护, 只不过是容器级别的状态维护; 不过kubernetes在容器级别要做到不仅仅状态的维护, 还需要docker跨机器之间通信的问题.Related concepts 1:pod A pod is a collection of containers, each of which can contain one or more containers; For ease of management the same container that runs the same business in a

1. Introduction to Kubernetes Scheduler Kubernetes Scheduler runs at the master node, its core function is to listen to the apiserver to get the pod that is podspec.nodename empty, and then create a binding for each such pod that the pod should be dispatched to on which nod

The sandbox isn't in sync with the Podfile.lock. Run ' pod install ' or update your CocoaPods installation. 'Usually as long as the terminal input pod install is good, but today is wrong, prompt [!] Unable to find a specification for ' FMDB 'Then I entered the pod search Fmdb in the terminal, the result unexpectedly prompt: [!] Unable to find a

Tags: k8s dockerRun the following command:Kubectl Run Nginx2--image=nginx--replicas=2Check the pod status as follows:Kubectl Get allView pod description information as follows:Kubectl describe pod NGINX2-6DBF4CD9BC-MBTVHView Log on to 172.16.91.211 node, view Kubelet logsJournalctl-u kubelet-fThe error content is as follows:May 05:43:30 Node2 kubelet[1605]: E0517

:3.0 gcr.io/google_containers/pause-amd64:3.02. Using the internal private warehouse, add the following parameters to the Kubelet service process for each k8s node:"--pod-infra-container-image=my.hub.io/pause-amd64:3.0">>> node Mirror list [ Mirror of Private warehouse recommended in real world ]:# Docker images ( display content is easy to view, so incomplete)GCR.IO/GOOGLE_CONTAINERS/PAUSE-AMD64 3.0Index.tenxcloud.com/google_containers/kube2sky 1.11I

CocoaPods pod install/pod update slow, cocoapodspod CocoaPods is used to add a third-party class library. no matter whether the pod install or pod update is executed, it is stuck in Analyzing dependencies because the CocoaPods spec repository will be upgraded when the above two commands are executed, adding a paramete

I. Introduction ofKubernetesKubernetes is Google open source container cluster management system, based on Docker to build a container scheduling service, providing resource scheduling, balanced disaster recovery, service registration, dynamic expansion capacity and other functional suites, using Kubernetes can easily manage the cross-machine operation of containerized applications. and Kubernetes supports

Recently using Cocoapods to add a third-party class library, whether to perform pod install or pod update is stuck in the analyzing dependencies is not moving, it is very dt.Check a lot of information, the reason is that when executing the above two commands will be upgraded Cocoapods Spec warehouse, plus a parameter can omit this step, and then the speed will be improved a lot. The commands to add paramete

Environment: OSX EI 10.11.1After switching to the gem source yesterday, there was no problem with the pod installation, or it could be used$ gem Sources--add https://ruby.taobao.org/--remove https://rubygems.org/$ sudo gem install CocoapodsToday when the use of the time, under a project to execute pod install half a day or so no response, but the CTRL + C forced to quit. Then the error occurs when you execu

Directory Kubernetes Introduction Kubernetes Main Concepts: Kubernetes Overall structure Reference Kubernetes IntroductionKubernetes is a Google Open source container orchestration system for automating deployment, scaling, and management of containerized applications. Run Anywhere: S

, such as local, you can use the same kube-config as Kubectl to configure the clients. If you're on the cloud, like Gke, you'll need an import Auth Plugin. The Clientset is generated with Client-gen. If you open pkg/api/v1/tyeps.go, there is a line of comments on the pod definition, called "+genclient=true", which means that you need to generate a client for this type, and if you want to do your own API type extension, The corresponding clients can

Recently used Cocoapods to add a third-party class library, whether the pod install or pod update is stuck in the analyzing dependenciesThe reason is that when executing the above two commands will upgrade the Cocoapods spec warehouse, add a parameter can omit this step, and then the speed will be improved a lot. The commands to add parameters are as follows:Pod Install--verbose--no-repo-updatePod Update--v