digitalocean kubernetes

There are two requirements for stateful cluster services: one is storage requirements and the other is cluster requirements.For storage requirements, the Kubernetes solution is: Volume, persistent Volume. For PV, in addition to manually creating a PV pool, the storage system can be automatically created by storage class.For cluster requirements, the Kubernetes solution is pet Set. The Pet Set also initializ

To succeed in today's fast-paced development environment,Leveraging container technology and DEVOPS practicesIt is important to build and continuously deliver microservices.As a Java developer,As you integrate the latest tools and development methodologies,You need to take advantage of some of the powerful features of the Java language.Today, we're going to learn how to deploy Java-based microservices applications to Kubernetes clusters using Micropro

In a production environment kubernetes if you provide only HTTP or HTTPS services, you can use seven-tier load balancing software such as nginx-ingress or Traefik. Of course, you can also expose HTTP or TCP services in a nodeport way. If you do not want to directly use the port number exposed by Nodeport, and the server is running on the Ali Cloud, you can expose the TCP service or Controller service externally using the

Objective in the Kubernetes system, Scheduler is the only one in the plugin form of the module, this pluggable design to facilitate user-defined scheduling algorithm, so the source path for the plugin directory of CMD and pkg/scheduler Scheduler is responsible for arranging the pod to the specific node, monitoring the Pods through the interface provided by API Server, acquiring the pod to be scheduled, ranking each node nodes according to a series

Containerized technology (containerization).You may have a lot of doubts: what exactly is a container and how does it work? What does Docker and kubernetes mean, and what is the use of Google Container engine and managed VMS? How are they related, and how can we build a powerful service through containers and make them available in a large-scale cluster of production environments? How can you get business value by using this technology? Well, we don't

Services deployed by users on Kubernetes typically run on private networks, and pod and service provide parameters such as Hostport,nodeport to expose these service ports to K8S nodes for user access. There are obvious drawbacks to this approach:1) Easy to occupy excessive host port;2) service ports exposed to multiple hosts increasing the difficulty of firewalls and security configuration3) The default hostport,nodeport mode does not function as load

1. The following error was reported during the creation of Nginx pod:#kubectlcreate-F Nginx-pod.yaml from " Nginx-pod.yaml " " Nginx " is for default/default is automatically created and added to the service accountWorkaround:1> Modify the Kube_admission_control parameter in the/etc/kubernetes/apiserver file.Before modification:Kube_admission_control="--admission_control=namespacelifecycle,namespaceexists,limitranger, Securitycontextdeny,serviceacco

Brief introductionKubernetes is an open source, containerized application for managing multiple hosts on a cloud platform, with the goal of making deploying containerized applications simple and efficient, Kuernetes provides a mechanism for application deployment, planning, updating, and maintenance.In Kubernetes, all containers are run in pods, and one pod can host one or more related containers. Each pod system created by the user automatically choo

components $ yum install-y etcd kubernetes NTP flannel 3, each node configuration ETCD Server # Modify config file $ vim/etc/etcd/etcd.conf Etcd_name=defaultEtcd_data_dir="/var/lib/etcd/default.etcd"Etcd_listen_client_urls="http://localhost:2379,http://192.168.80.139:2379"Etcd_advertise_client_urls="http://192.168.80.139:2379"# Start Service $ systemctl start ETCD $ systemctl enable etcd# check ETCD cluster status $ etcdctl cluster-Hea

1. Reference documentationhttp://traefik.cn/2. Simple way to accessReference documentshttps://tonybai.com/2018/06/25/the-kubernetes-ingress-practice-for-https-service/Previous: Traefik Basic deployment record, describes the simplest HTTP access Traefik, the access process reference is shown below:Client---(via HTTP)---> Traefik----(via HTTP)----;? ServicesNow to practice is more secure and more complex HTTPS access Traefik, there are two kinds of acce

This article describes the use of Node-exporter, Prometheus, Grafana to monitor the cluster in a k8s cluster.Its implementation principle is somewhat similar to elk, EFK combination. The Node-exporter component collects the metrics monitoring data on the node and pushes the data to Prometheus, Prometheus is responsible for storing the data, and grafana the data to the user in a graphical form on the Web page. Before you begin, it is necessary to understand what the next Prometheus is. Prometheu

In a cluster with TLS enabled, each time the cluster interacts with identity authentication, using Kubeconfig (i.e., certificates) and token two authentication methods is the simplest and most common authentication method.Take Kubectl as an example to introduce the configuration of Kubeconfig. Kubectl is just a go-written executable program that can be used by any node in the cluster as long as the appropriate Kubeconfig is configured for Kubectl. Kubectl Default is to find files with file names

Kubernetes+docker the cloud platform in CentOS7 installation on the system 1. Run VIRTUALBOX5. 2. Install the CENTOS7 system.Note: Select the basic server typeThe installation process is slightly. 3. Modify the computer IP and computer name.1) Nmtui1.Modify Host Name:NMCLI General hostname slave1.smartmap.com2.Modify Network ConnectionsNMCLI Connection Edit ENP0S3Nmcli> Goto IPv4Nmcli ipv4> Set Method manualNMCLI ipv4> Set Addresses 192.168.1.203/16N

Deploying Heketi and Glusterfs in Kubernetes[TOC]1. PrefaceIn Kubernetes, using the Glusterfs file system, the procedure is usually:Create brick--> Create volume--> Create pv--> create pvc-->pod mount PVCIf you are creating more than one PV, you need to manually repeat these interlocking steps, Heketi can resolve these duplication problems.Heketi is used to manage the life cycle of the glusterfs volume and

By default, Kubernetes has a certificate validity period of 1 years when initializing a cluster. Manually generating certificates can avoid this problem. Pull git code git clone https://github.com/fandaye/k8s-tls.git CD k8s-tls/2. Edit the configuration file ' Apiserver.json ' file in the Hosts section, add the corresponding Kubernetes master node hostname and IP address to ', ' number interv

Reference article:1. Kubernetes Learning Resources1, "Kubernetes and cloud-native application" series of kubernetes system architecture and design concept2, [Docker Professional introduction website Dockerinfo] (Dockerinfo-docker container Technology tutorial, docker information dissemination and service platform)3, [Docker Professional introduction website Docko

Summary Project Background (XX Bank customer): The private cloud on the k8s to run like MySQL in the state of the database services, performance and latency are relatively sensitive, not like the web bias application of stateless delay performance almost acceptable. But the network performance and delay is poor based on overlay mode, and the network architecture is more complex. And banks need to be simple and controllable for IP network management. Sr-iov is based on hardware implementation of

0. Preface Overall architecture directory: ASP. NET core distributed project-Directory k8s Schema Catalog: Kubernetes (K8S) cluster deployment (K8S Enterprise Docker container cluster Management) series catalog 1. Deploy Master Components The components of the master server are: Kube-apiserver, Kube-controller-manager, Kube-scheduler So you need to download k8s master,:github.com/kubernetes/

Haven't written a blog for a long time, the company engaged in a period of 997 is too brutal. 997 End also fast 1 weeks, finally slow down a bit, first two easy article, and then a little work, write a Kubernetes series. This article mainly introduces the kubernetes related commands, for the initial contact Kubernetes reference.Kubernetes through the kube-apiserv

Pokemon per second processing of Go cloud data storage (expected vs Actual) This can happen, and you should be prepared for it as well. This is also the article in this series to mention. In this series of tutorials we'll show you what you need to track, why you're tracking them, and what you need to do to deal with possible root causes. We'll show you each indicator, how to track it, and what you can do to take action. We will use different tools to collect and analyze this data.