华为CCE安装isito实现ASM服务网格
华为云在国内上线的有商业版的服务网格产品ASM（基于isito的商业产品），不过在海外regions没有上线，刚好遇的一个项目需要在华为云CCE上使用服务网格，跟同事简单沟通了下客户需求，就手动安装了一个isito实现服务网格。 一、安装istio istio的安装配置需要使用到is……
包含标签 k8s articles
K8S HPA扩缩容灵敏度
K8S 1.18 迎来了一次更新，在之前 v2beta2 版本上新增了HPA扩缩容灵敏度的控制，不过版本号依然保持 v2beta2 不变。这次更新实际就是在 HPA Spec 下新增了一个 behavior 字段，下面有 scaleUp 和 scaleDown 两个字段分别控制扩容和缩容的行为，具体可参考 官方 API 文档。其主要可以用于以下场景： 对于有流量突发的关键业务，在需要的时候应该快速扩容 (即……
K8S中使用自定义指标进行HPA扩缩容
k8s的默认扩缩容使用的是metrics-server来实现的，一般自指义指标（custom HPA）通过prometheus和prometheus-adapter来实现的。Prometheus 用于监控应用的负载和集群本身的各种指标，Prometheus Adapter 可以帮我们使用 Prometheus 收集的指标……
如何快速创建k8s yaml文件
一、YAML Autogeneration using Kubernetes Extention One of the easiest ways to create Kubernetes YAML is using the visual studio kubernetes extension. Install the Kubernetes VS code extension, and it will help develop k8s manifests for most kubernetes objects. It also supports deploying apps to local and remote k8s clusters. All you have to do is, start typing the Object name and it will automatically populate the options for you. Then, based on your selection, it will autogenerate the basic YAML structure for you as shown n the following image. This extension supports YAML generation of Pods, Deployment, Statefulset, Replicationset, Persistent Volumes (PV), Persistent Volume Claims (PVC), etc. 二、Create YAML Manifest Using Kubectl Dry Run You can create the manifests using the kubectl imperative commands. There is a flag……
K8S中使用Prometheus监控nginx指标
一、环境描述 K8S中一般使用Prometheus进行指标数据的监控，而对于custom metrics自定义指标，需要满足Prometheus可以识别的格式发送。这时候一般需要写exporter来搞定自定义数据，然后上报。本篇结合nginx示例来配置下自定义指标监控。 为了省于前期复……
如何重启pod
A pod can also have one or more containers, one of which is the application container, and the others are the init container, which halts after it completes a job or the application container is ready to perform its function, and the sidecar container, which is affixed to the primary application container. A container or pod will not always leave due to an application failure. In scenarios like this, you will need to restart your Kubernetes Pod explicitly. In this guide, you will explore how to force pods in a deployment to restart using several ways. Pre-requisites To restart the pod using kubectl, make sure you have installed the kubectl tool along with the minikube cluster. Otherwise, you will not be able to implement the prescribed article. Methods to create pods using Kubectl To restart pods using Kubectl, you have……
ks8 a container name must be specified for pod报错处理
在现网的一个系统上通过kubectl logs pod名称查看日志时报错a container name must be specified for pod。出现该问题比较容易解决，一般出现该问题的都是多个container共用一个pod的情况，比如sidecar模式下，这时候查看日志的时候需要指定Pod外，还需要通过-c参数指定container。 kubectl-logs-container……
CCE Turbo集群升级了什么
在2021年4月25的华为HDC cloud开发者大会上，华为云发布了升级版的云容器集群CCE Turbo。其相较于CCE集群，在计算、网络和调度方面全方位加速。本篇就结合一些找到的知识点，总结下CCE Turbo相较于CCE增加了哪些技术关键点。 一、CCE Turbo特性 从华为官方网站……
Deploy, Scale and rollback an Application with Helm
Introduction Containers have revolutionized application development and delivery on account of their ease of use, portability and consistency. And when it comes to automatically deploying and managing containers in the cloud (public, private or hybrid), one of the most popular options today is Kubernetes. Kubernetes is an open source project designed specifically for container orchestration. Kubernetes offers a number of key features, including multiple storage APIs, container health checks, manual or automatic scaling, rolling upgrades and service discovery. Applications can be installed to a Kubernetes cluster via Helm charts, which provide streamlined package management functions. Assumptions and Prerequisites This guide focuses on deploying an example phpbb application in a Kubernetes cluster running on either Huaweicloud CCE or Minikube. This guide makes the following assumptions: You have a Kubernetes 1.5.0 (or later) cluster. You have kubectl installed and configured to work……
Create Your First Helm Chart
Introduction For a typical cloud-native application with a 3-tier architecture, the diagram below illustrates how it might be described in terms of Kubernetes objects. In this example, each tier consists of a Deployment and Service object, and may additionally define ConfigMap or Secret objects. Each of these objects are typically defined in separate YAML files, and are fed into the kubectl command line tool. A Helm chart encapsulates each of these YAML definitions, provides a mechanism for configuration at deploy-time and allows you to define metadata and documentation that might be useful when sharing the package. Helm can be useful in different scenarios: Find and use popular software packaged as Kubernetes charts Share your own applications as Kubernetes charts Create reproducible builds of your Kubernetes applications Intelligently manage your Kubernetes object definitions Manage releases of Helm packages Let……