kubernetes course

Docker Network BasicsSince Kubernetes is based on the Docker container as the carrier of the application release, the network characteristics of Docker also determine that kubernetes in building a container interoperability network must solve the problem of Docker's own network.Network namespacesTo support multiple instances of the network protocol stack, Linux introduces a network namespace in the network

-speed storage to store a large number of fragmented files. What the user needs to do is submit the resource request to the cloud platform and then fetch and consume the storage resource without worrying about which disk of the storage server The underlying store is from. to meet the storage needs of container users in the cloud environment. Kubernetes provides the concept of persistent volumes (PERSISTENTVOLUME,PV) and persistent volume requests (PE

In this blog post, let's say a question about customizing the configuration in the pod of kubernetes.We know that in almost all application development, configuration file changes are involved, such as in the Web program, the need to connect to the database, cache, and even queues. And one of our applications starts with writing the first line of code, going through the development environment, the test environment, the pre-release environment only to the final online environment. Each environme

In this blog post, let's say a question about customizing the configuration in the pod of kubernetes.We know that in almost all application development, configuration file changes are involved, such as in the Web program, the need to connect to the database, cache, and even queues. And one of our applications starts with writing the first line of code, going through the development environment, the test environment, the pre-release environment only to the final online environment. Each environme

This is a creation in Article, where the information may have evolved or changed. kubectlFunctions that are actually running ( k8s.io/kubernetes/pkg/kubectl/app/kubectl.go ): func Run() error { cmd := cmd.NewKubectlCommand(cmdutil.NewFactory(nil), os.Stdin, os.Stdout, os.Stderr) return cmd.Execute()} NewKubectlCommandThe code ( k8s.io/kubernetes/pkg/kubectl/cmd/cmd.go ): //Newkubectlcommand creates t

A description of the application scenarioContinuous tracking research kubernetes also for some time, kubernetes as Google open-source production-level container scheduling system from open source has received a lot of attention. A number of research and development companies have researched Kubernetes's design concepts and application scenarios and soon organized developers to combine

KUBERNETES cluster to build the basic environmentSystem Environment # Cat/etc/redhat-releasecentos Linux release 7.3.1611 (Core) Host name Settings Centos-master 192.168.59.135centos-minion1 192.168.59.132centos-minion2 192.168.59.133Restart server after SELinux and Firewalld are turned off# systemctl Stop firewalld# systemctl disable firewalld# setenforce 0# sed-i ' s/^selinux=.*/selinux=disableds/'/etc/seli Nux/configMaster Node Installation D

Download deployment Files according to official documentshttps://raw.githubusercontent.com/kubernetes/dashboard/master/src/deploy/recommended/kubernetes-dashboard.yamlEdit this and replace the role name with the following command implementation: Create Kubernetes-dashboard-rbac.yamlDownload the deployment file, there is a place to note, it is created in

Kubernetes has developed a Elasticsearch add-on to enable log management of the cluster. This is a combination of Elasticsearch, FLUENTD and Kibana. Elasticsearch is a search engine that is responsible for storing logs and providing query interfaces; Fluentd is responsible for collecting logs from Kubernetes and sending Elasticsearch;kibana a Web GUI that users can browse and search for stored in Logs in th

Summary: Kubernetes is Google open source container cluster management system, built on Docker, for containerized applications to provide resource scheduling, deployment operations, service discovery, capacity expansion and other functions. Pods are the smallest deployment units that are created, dispatched, and managed, and this article describes the communication and scheduling between these pods in detailOverviewThe Pods in

The reference urls:https://github.com/kubernetes/kubernetes/blob/master/docs/getting-started-guides/ ubuntu-calico.mdhttps://github.com/projectcalico/calico-docker/blob/master/docs/kubernetes/ Kubernetesintegration.md I have 3 hosts:10.11.151.97, 10.11.151.100, 10.11.150.101. Unfortunately, there is no Internet access in all 3 hosts. Following the guide, I-Build

Here, I'll show you how to install a kubernetes cluster that contains 1 Master 2 minions.Environmental requirements:CENTOS7 64-bit system three machinesmaster:192.168.5.131minions:192.168.5.132minions:192.168.5.133Components of the Kubernetes:EtcdFlannelKube-apiserverKube-controller-managerKube-schedulerKubeletKube-proxyFirst, deploy to Centos7The figure is then furnishedPrerequisite Each machine disables iptables to avoid iptables conflicts

containers, making deployment and management more flexible. 　　　　　　 　　　　　　 A pod can contain a container or multiple related containers. 2) Replication ControllerThe Replication Controller manages a copy of the pod to ensure that a specified number of pod copies exist in the cluster. If the number of replicas in the cluster is greater than the specified number, the number of extra containers that are outside the specified number is stopped, and conversely, containers with fewer than a specified

Kubernetes can connect pods on different node nodes in the cluster, and by default, each pod is accessible to each other. However, in some scenarios, different pods should not be interoperable, and access control is required at this time. So how does it work?Brief introduction?? Kubernetes provides Networkpolicy feature, which supports network access control by namespace and by pod level. It uses the label

Production 丨 Docker Co., Ltd (ID:DOCKER-CN) Compiling 丨 small East Every Monday, five 6:10 P.M. with you see not scattered Say in front Today brings you a tutorial on creating a kubernetes cluster quickly with Docker. This tutorial is based on my previous article "10-minute deployment of kubernetes cluster," updated, condensed. This tutorial has been verified by me many times, and it has some guiding sign

what is kubernetes. Kubernetes is a new, container-based distributed architecture leading solution. is an open source version of Google's internal cluster management system, Borg. It was not known until April 2015, when the papers were published. Kubernetes is an open platform for development. is not limited to any one language and does not qualify any programm

This is a creation in Article, where the information may have evolved or changed. K8s Offline installation package Three-step installation, simple to unbelievable Kubeadm Source Code Analysis To say the truth, Kubeadm code is sincere, the quality is not very high. A few key points to first talk about some of the core things Kubeadm did: Kubeadm Generate certificate in/etc/kubernetes/pki directory Kubeadm generate a static pod Yaml configurati

Introduction and practice of pod in kubernetes The concept of podDetailed pod explanation can refer to k8s official website, the concept of pod mainly has the following points:(1) Pod is the smallest and simplest unit that you can create and deploy in Kubernetes. A pod represents a process that runs in a cluster;(2) How to use pod in kubrenetes cluster;(3) How to manage multiple containers in pod Unde

[TOC]Introduction to Kubernetes DispatchingIn addition to having the Kubernetes cluster scheduler automatically select a node for the pod resource (the default schedule is that the resources are sufficient and the load is as average as possible), there are situations where we want to have more control over how the pod should be dispatched. For example, some of the machines in the cluster are better configur

Kubernetes is Google 's Open source container cluster management system. It is built on Docker technology and provides a whole set of functions, such as resource scheduling, deployment operation, service discovery, expansion and contraction capacity, for containerized applications, which can be regarded as Mini-paas platform based on container technology. The purpose of this article is to comb the architecture, concepts, and basic workflows of