From now on, oschina will move to the WeChat official account [Linux O&M Xiaobai]. See you later on!

Delete the specified Metric data within the specified time range curl - X POST - g ' http://127.0.0.1:9090/api/v1/admin/tsdb/delete_series?start=1660723273&end=1667894433&match []=node_cpu_seconds_total{mode="...

The scenario is reproduced in centos7. When the df command is used to view the disk space, it is hung. After two weeks, it is decided to deal with the problem. Check the df command hanging strace df, check the system call, and find that it is blocked in stat ("/proc/sys/fs/binfmt_mi

#!/ Bin/bash # Batch confirm server ssh password # Default root user # Requirements: yum - y install sshpass expect res="res. txt" err_res="err_res. txt" pwds=“ xxxx@htjj2021 xxxx.root.xxxx xxxx...

Note: Due to limited technical ability, this time we just record our own problem solving process. As for the principle, we need to further study it. Please don't spray it if you don't like it. Of course, if there is something wrong, please don't hesitate to teach us. The first task received by the induction: pay attention to Zabb

Background As a new generation of migrant workers, it must be familiar with VPN. In order to improve the company's network security, most Internet companies will do network isolation on the company's internal platform (prohibit random access to the public network environment), and the commonly used tool is OpenVPN. OpenVPN is simple, practical, and safe

I have used the API gateway before, but I have never had a clear understanding of its principle. I accidentally saw a good article and moved it to avoid missing it in the future. [51CTO.com original contribution] In order to improve the performance and reliability of the system, we split the application services into microservices

A request can definitely be divided into a request header and a request body. Our client's IP address information is generally stored in the request header. If your server uses Nginx for load balancing, you need to configure X-Real-IP and X-Forward in your location

Step summary Prepare the machine, install the Linux operating system, initialize the self signed certificate, deploy the master node component, etcd kube apiserver kube controller manager kube scheduler, deploy the cluster network, deploy the worker node component, prepare

Why does HELM need HELM to deploy applications to Kubernetes before using HELM? We need to deploy deployment, service, configMap, etc. in turn. The steps are tedious. Moreover, with the microservice of many projects, the deployment and management of complex applications in containers appears

The mechanism of security authentication mechanism shows that as a management tool of distributed cluster, ensuring the security of the cluster is an important task. API Server is the intermediary of communication between various components in the cluster, and also the entrance of external control. So the security mechanism of K8S is basically around

The storage type configMap Secret volume Persistent Volume storage ConfigMap ConfigMap function was introduced in k8s1.2. Many applications read configuration information from configuration files, command line parameters, or environment variables. The ConfigMap API provides information about the content

Service in Service K8s defines such an abstraction: a logical grouping of pods, a policy that can access them - usually called microservices. This group of pods can be accessed by the Service, usually through the Label Selector SVC principle:

Pod Classification Autonomous Pod: Pod exits, and this type of Pod will not be created. Pod managed by the controller: The number of copies of the pod is always maintained during the life cycle of the controller. Controller k8s has many built-in controllers, which are equivalent to a state machine, used to control

Resource resource classification in K8S: namespace level: namespace, kubectl get namespace ， When viewing pods through kubectl get pod, it defaults to the pod in the default space. Use the - n parameter kubectl get pod - n kube system to view the pointer

Introduction to scheduling process scheduler: fair, efficient use of resources, efficiency, flexible scheduling process Detail: customized scheduler cluster scheduling View pod tag: kubectl get pod -- show labels Node affinity pod. spec. nodeAffinity:

Deploy the private warehouse, download the harpor-2.1.0 installation package, download the offline installation package: $wget https://github.com/goharbor/harbor/releases/download/v2.1.0-rc2/harbor-offline-installer-v2.1.0-rc2.tgz Unzip! Modify h

Kubectl Instructions $kubectl -- help kubectl controls the Kubernetes cluster manager Find more information at: https://kubernetes.io/docs/reference/kubectl/overview/ Basic Command...

Xargs (eXended ARGuments) is a filter for passing parameters to commands and a tool for combining multiple commands. Xargs can convert pipe or stdin data into command line arguments, and can also read

Overview of the installation tool: Kubeadm installs the soft route - koolshare windows operation. If you can access the Internet, you do not need to install koolshare. Install the cluster and prepare to close the virtual memory: swapoff - a&&sed - i '/swap/s/^ (. *) $/# 1/g