1. Why Dial Testing For some of the critical services in a system, we usually set up monitoring. When a failure occurs, it can be detected as quickly as possible and a notification sent to the people who care. Once a failure has occurred, the failure process can be traced

Helm is the package manager for Kubernetes; Operator is used to manage stateful distributed applications on Kubernetes. This article mainly describes how to use Helm and Operator to quickly deploy Prometheus on a Minikube cluster and use Grafana to view monitoring data. For Minikube installation, see Building a Remote Kubernetes Development Environment; for Helm configuration, see The Package Manager for Kubernetes – Helm; for Operator, see Kubernetes Complex Stateful Application Management Framework – Operator.

1. Kubectl Basic Commands 1.1 Creating Objects 1 2 3 4 5 6 7 8 # Create resources; a remote URL also works kubectl create -f ./my.yaml # Create resources from multiple files kubectl create -f ./my1.yaml -f ./my2.yaml # Create resources using all manifest files in a directory kubectl create -f .

Internet services often depend on tens of thousands of hosts, and those hosts are deployed all over the world, on top of a tangled mess of user environments. To keep a service stable and reliable, you need to monitor it. The goals of monitoring can be considered from several angles: from the system dimension, understand CPU, memory, and disk usage; from the network monitoring dimension, understand upstream and downstream rates; from the service monitoring dimension, understand the health and availability of the application.

There are many performance tools on the Linux platform, enough to make your head spin, but long-term exploration and experience have shown that the most useful ones are still those time-tested, simple little utilities. Below are the command-line tools collected from system performance expert Brendan D. Gregg’s talk on Linux performance (Linux Performance Tools).