kubernetes command

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 node. From where to read the pod that hasn't been scheduled yet. Of course it's apiserver. How do you know pod is not scheduled? It asks t

Restartpolicy:neverThe second pod example only mounts the Configmap special.how key to a relative path in the/etc/config directory Path/to/special-key, if there is a file with the same name, overwrite it directly. The other key does not mount:ApiVersion:v1kind:Podmetadata: name:dapi-test-podspec: containers: -name:test-container Image: Gcr.io/google_containers/busybox command: ["/bin/sh", "-C", "Cat/etc/config/path/to/special-key"]

Guide to Questions1. What is kubernetes.2. Try new features in the Kubernetes cluster and how to implement it.3. Watch the spark resource created on the cluster and how to operate it.We need to know before we start.What is KubernetesKubernetes (usually written as "k8s") is the first open source container cluster management project that was ultimately contributed by Google Design and development to Cloud Nat

Mesos and Kuberneteshttp://dockone.io/article/956 I firmly believe that their use will grow faster in the next year, so it is time to review the summary and prepare for 2016 years. I would like to discuss the current situation of Mesos and kubernetes and enumerate the strengths and weaknesses that will allow you to understand the concept of cluster manager.Mesos and KubernetesBefore I start, I'd like to take the time to roughly compare Mesos and

Colleagues who have studied kubernetes know that kubernetes if you need to enable TLS authentication, making a certificate is an essential step. However, many people encounter a lot of trouble in making certificates. Today is the main record of how I made my certificate during the deployment of Kubernetes. Throughout the process, the startup parameters for each c

Resources:k8s-Network Isolation Reference Opencontrail is a open source network virtualization platform for the cloud. –kube-o-contrail–get your hands dirty with Kubernetes and Opencontrail Opencontrail is a open source network virtualization platform for the cloud. Opencontrail Architecture Document-flying Eagle's diary-NetEase Blog Opencontrail Study (i)-wanjia19870902 's Colu

OverviewCoredns is so notorious because it was introduced from kubernetes1.9 as the default DNS for Kubernetes internal service discovery. There is no doubt that Kubernetes is one of Coredns's backend, so we speak Coredns, starting with Kubernetes as the back end.Many of Coredns's features are mentioned on the web and are not covered here. A simple comparison of

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

CONFIGMAP parameter directly on the command line, i.e.--from-literal Create a configuration file as a configmap by specifying the file creation--from-file= By specifying the directory creation, all profiles under a directory are created as a configmap, --from-file=Created by the Yaml file, and the other by Kubectl directly at the command line. Write the standard configmap Yaml file in advance, and th

There are several ways to install the Kubernetes cluster, the KUBEADM approach is described earlier, and the manual installation method is described in this article.The installation environment has 3 VMS on Azure:HKUBE01:10.0. 1.4 HKUBE02: 10.0. 1.5 Hbube03: 10.0. 1.6Where hkube01 is the master node, it will install Docker, ETCD, Kubernetes Master, flannel required components;HKUBE02 and hkube03 are worker

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

ETCD-V3.1.8-LINUX-AMD64CP Etcd Etcdctl/usr/bin4 Installing flannel 1) Download flannel Compression Packwget https://github.com/coreos/flannel/releases/download/v0.7.1/flannel-v0.7.1-linux-amd64.tar.gz 2) Unzip the flannel compression packTar-xzf flannel-v0.7.1-linux-amd64.tar.gz3) Copy Flannel executable programCD FLANNEL-V0.7.1-LINUX-AMD64CP Flannelid Mk-docker-opts.sh/usr/bin5 Installing k8s 1) Get k8s Master version (1.7.0-alpha)git clone https://github.com/

Controller manager, as the Management control center within the cluster, is responsible for the resource management in the cluster, including node, Pod, namespace, and rated resources. For example, when an unexpected node outage occurs, Controller Manager will promptly discover and perform an automated fix.First, deploy k8s Controller ManagerMake sure Controller-manager-key.pem and Controller-manager.pem exist, and I've created the relevant private key here in the previous article. Perform the f

2, set kubeconfig2.1 settings Kubectl kubeconfig (admin.conf)# set cluster parameters kubectl config set-cluster kubernetes--certificate-authority=/etc/kubernetes/pki/ca.pem--embed-certs=true --server=https://master_vip:6443--kubeconfig=admin.conf# Setting Client authentication Parameters kubectl Config set-credentials kubernetes-admin- -client-certificate=/etc/

Prerequisite: CENTOS7 has been updateYum Update-yFirst, to create a Yum source Master,slave areKubernetes Release version Yum sourcehttp://cbs.centos.org/repos/virt7-docker-common-release/x86_64/os/Packages/VI Virt7-docker-common-release.repo[virt7-docker-common-release]name=virt7-docker-common-releasebaseurl=http://cbs.centos.org/repos/ Virt7-docker-common-release/x86_64/os/gpgcheck=0Second, Yum installation ServicesYum-y Install--enablerepo=virt7-docker-common-release

Helm IntroductionDeploying container cloud Applications (container or microservices orchestration) in Kubernetes is a challenging task, Helm is to simplify the installation of a client tool for deploying container cloud applications in Kubernetes. Helm enables developers to define, install, and upgrade container cloud applications in Kubernetes. At the same time,

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

master node's own IP address, cluster_ip_subnet for the entire cluster subnet range, For example, 192.168.0.0/16, while Master_switch_subnet is the subnet range that the pod on the master node can allocate, such as 192.168.1.0/24SOURCE Link: https://github.com/YaoZengzeng/scripts/blob/master/ovn-k8s-master.sh4, at first I was using KUBEADM to build k8s cluster, but when the API server through http://127.0.0.1:8080 to find that the port is not open, it may be kubeadm by default is not open the p

Kubernetes Kubeadm installation requires the following four packages Kubelet Kubernetes-cni Kubeadm kubectl These four packages can be downloaded via the Https://github.com/kubernetes/kubernetes warehouse to perform make fetch installation packages, and the release version is required if the RPM package is required. In

Brief Description:RKE (Rancher Kubernetes Engine) is a tool provided by Rancherlabs to quickly install Kubernetes clusters on bare metal, virtual machines, public and private clouds. The deployment of the entire cluster requires only one command, one configuration file, which solves the problem of how to easily deploy kubernetes.Although rancher provides free vid