kubernetes federation

In the previous blog post, we completed the Sonarqube deployment through Kubernetes's devlopment and service. Seems to be available, but there is still a big problem. We know that databases like MySQL need to keep data and not lose data. And the container is exactly the moment you exit, all data is lost. Once our Mysql-sonar container is restarted, any subsequent settings we make to Sonarqube will be lost. So we have to find a way to keep the MySQL data in the Mysql-sonar container.

What is PodPods are the smallest deployable units that can be used to create and manage kubernetes calculations. A pod represents a process that runs in a cluster.Pods are like pea pods, which consist of one or more containers (such as Docker containers) that share container storage, network, and container run configuration items. The containers in the pod are always dispatched at the same time and have a common operating environment. You can think of

ReviewSimply put: Each component version that Kubernetes relies on can be found in the corresponding ChanglogFor example, version 1.10 depends on the following conditions:Https://github.com/kubernetes/kubernetes/blob/master/CHANGELOG-1.10.md#external-dependenciesThe following simple example summarizes:k8s v1.10 dependent version Select 1.10.0 Dependent package:Ht

Simple IntroductionUse docker+kubernetes today to build a simple Hello World node. js Application.Actual operation1. Follow the tutorial to install docker+kubernetes for MACAbout ToolAbout states2. Verify SuccessDockerKubernetes versionThis docker+kubernetes installation is successful.2. Writing the node. JS ApplicationSave this code in a folder named Hellonode w

CentOS7 Build Kubernetes DashboardAn environmental statementCentos7 Three, master node one, node nodes twoDashboard requires a mirror and requires a command download:Docker Pull mritd/kubernetes-dashboard-amd64:v1.5.1PS: There are many other mirrors can also build dashboard, but this version is the Chinese version ofNote: All two node nodes need to download this image, the master node does not, because the

[TOC]Introduction to Rolling UpdatesWhen a service in a kubernetes cluster needs to be upgraded, it is a traditional practice to go offline with the service that is being updated, to update the version and configuration after the business is stopped, and then to restart and provide the service. If the business cluster is large, this work becomes a challenge, and all stops first, and the gradual escalation will result in the service being unavailable f

Add/Remove node to Kubernetes cluster Minion node pre-operation preparation#关闭防火墙systemctl stop firewalld#禁止防火墙开机启动systemctl disable firewalld#检查selinuxgetenforceDisabled#端口检查 Add node to the Kubernetes clusterWhen the KUBEADM Init initialization operation is complete, the system finally gives the command to join the node to the cluster:kubeadm join 10.0.0.39:6443 --token 4g0p8w.w5p29ukwvitim2ti --dis

"Editor's words" The Kubernetes Scheduler dispatches the pod to the work node according to a specific algorithm and strategy. By default, the Kubernetes scheduler can meet most of the requirements, such as scheduling pods to run on resource-rich nodes, or scheduling pod dispersal to different nodes to make cluster nodes resource balanced. However, in some special scenarios, the default scheduling algorithm

1. Foreword In the last article "Kubernetes Scheduler Module Analysis", the Scheduler scheduling process and the main algorithm are analyzed. From the overall grasp of the scheduler scheduling mechanism, today want to continue to analyze the more detailed content. 2. Summary Today, we mainly analyze the caching mechanism of scheduler, Extender extension mechanism and tainttoleration mechanism. These three aspects, although not so macroscopic, but for

: -Mountpath: /etc/ssl/certs name:ca-certificates readonly:true -Mountpath:/varName:Grafana-Storage env: -Name:Influxdb_host value:Monitoring-Influxdb-Name:Gf_server_http_port value: " the"# The following env variables is required to make Grafana accessible via # the Kubernetes API-ServerProxy. on Production clusters,We recommend # Removing these env variables,Setup Auth forGrafana,and expose the Grafana # service using a loadbalancer

Participants : System engineers, software architects, software engineers, operations engineers, and it elites interested in cloud computingCourse Catalogue:First lesson Why you need to learn Dockerlesson two the container Base command series for Docker combatlesson Three the custom container image for Docker combatFourth lesson of the container interconnection of Docker actual combatFifth lesson Docker's container network mechanism (UP)Sixth lesson The container network mechanism of Docker Comba

the style and logic of the above code is no longer familiar: Create a The Schedulerserver object, which passes command-line arguments, and enters the schedulerserver Run method, does not die. --"kubernetes authoritative guide" source code guidance Kubernetes Scheduler Server is implemented by the Kube-scheduler process, which runs on the Kubernetes management nod

Basic knowledgeFirst: Docker is an open-source container, in fact this technology is not new. In the early days of Linux, there was a lightweight virtualization system like LXC. Docker is actually just a language to implement. Kubernetes means the helmsman of sailing, it's a powerful orchestration + Monitor + disaster preparedness + load management system for DockerSecond: Kubernetes is a summary and best p

First, IntroductionHeapster is a cluster-wide monitoring and event data aggregator. It natively supports kubernetes and can be run on all kubernetes settings. Heapster is run as a cluster in a group, similar to how any other kubernetes application runs. InfluxDB is an open source database written in go that is designed to handle time-series data with hi

in the previous section we discussed the services running on the Kubernetes architecture Master,This section discusses node nodes. Node is where the Pod runs, Kubernetes supports Docker, Rkt, and other container runtime. The Kubernetes components running on node have Kubelet, Kube-proxy, and Pod networks (such as flannel).KubeletKubelet is the agent of node, and

GlusterFSGlusterfs is an open-source, scale-out file system. These examples provide information about how to allow containers to use glusterfs volumes.The example assumes that you have set up the Glusterfs server cluster and is ready to use the running Glusterfs volume in the container.PrerequisiteThe Kubernetes cluster has been built.Installation of the Glusterfs clusterEnvironment IntroductionOS System: Centos 7.xGlusterfs of two nodes: 192.168.22.2

The problem of network error in Kubernetes System environment#系统版本cat /etc/redhat-releaseCentOS Linux release 7.4.1708 (Core)#kubelet版本kubelet --versionKubernetes v1.10.0#selinux状态getenforceDisabled#系统防火墙状态systemctl status firewalld● firewalld.service - firewalld - dynamic firewall daemonLoaded: loaded (/usr/lib/systemd/system/firewalld.service; disabled; vendor preset: enabled)Active: inactive (dead) Docs: man:firewalld(1) Pod anomaly Problem#d

Scheduler Source Analysis The last article mainly introduces the principle kubernetes principle of Kubernetes Scheduler--schedulerThis article mainly carries on the analysis to the Kubernetes Scheduler module source code. Scheduler Source Structure Kubernetes Scheduler module in the

This article starts with my public number clouddeveloper, and you are welcome to join me in learning cloud computing. From the previous article we know that Kubernetes born in the borg,borg of Google in the beginning of the birth of Kubernetes has been in the internal battle of Google more than 10 years, and does not say its history has a long tradition, it is from Google that talented engineers hand, K

The introduction on GitHub:Ambassador is a open source kubernetes-native API Gateway built on Envoy, designed for MicroServices . Key features include: Self-Service configuration, via Kubernetes annotations First Class GRPC and HTTP/2 support Support for CORS, timeouts, weighted round robin (Canary), and more Istio Integration Authentication Robust TLS support, including TLS c