Go Programming Pattern in Kubernetes Philosophy Harry Zhang @resouer Contents • What I will talk? • Kubernetes basic in 1 min • For Kubernetes developers: • The Golang programming patterns of popular open source projects in this world • Written by, and heavily depends on Golang Again: Why Go? • All about community • A sad story: • https://github.com/google/lmctfy • Now think about a of all Asta Xie instances $ kubectl get astaxie NAME KIND astaxie1 AstaXie.v1.cr.client-go.k8s.io My AstaXie Object & Controller etcd kube-apiserver types register AstaXie Controller

Operator Pattern：用 Go 扩展 K8s 的最佳实践 吴学强 ApeCloud KubeBlocks Maintainer & 研发总监 目 录 认识我们 00 什么是 Operator 01 Operator 基础模型 02 Operator 最佳实践 03 我们是谁 云猿生（ApeCloud）是一家提供数据库内核与管理平台的基 础软件开发商. KubeBlocks 熟悉如何生成二级资源（Managed Resource） 6. 熟悉如何写 UT 7. 熟悉如何制作 Helm Chart 课后思考题： 1. 如何不启动 WebHook？ 2. API 只要用 Go 写就可以了吗，需要修改对应的 YAML 文件吗？ 3. Setup 阶段，用 Watch 函数取代 Owns 并实现同样的目的。 4. Reconcile 函数为什么不区分 Create、Update

石墨文档GO在K8S上微服务的实践 彭友顺 石墨文档 基础设施负责人 目 录 1 架构演进 01 2 微服务的生命周期 02 3 如何管理好微服务 03 架构演进 第一部分 架构演进 单体应用时期 垂直应用时期 微服务时期 快速、简单 耦合强 隔离、稳定 复制多 隔离、稳定 复用高 架构演进 组件增多 架构复杂 维护困难 架构演进 传统模式 K8S模式 format、lint、breaking 检查。 CI build 阶段 • 会基于 pb 的注释自动产生文档，并推送至内部的微服务管理系统接口平台中 • 会生成 Go/PHP/Node/Java 桩代码和错误码，推送到指定的仓库 开发阶段 • go get 客户端、服务端的gRPC和错误码的代码 配置 对接 Debug • 配置驱动 • 配置补齐 • 配置工具 • Proto的管理 • 配置补齐 • 配置工具 • Proto的管理 • 错误码管理 • 调试gRPC • 调试信息 • 错误定位 Generate • protoc -I {error proto file} --go-errors_out={output directory} • 实现我们自定义的error类型，方便断言。 • 根据注解的code信息，在错误码中生成对应的grpc status code •

based on Prometheus + Grafana + EFK ● Ingest metrics and logs into Stackdriver without any instrumentation changes ● Aggregate logs from many clusters -- whether GKE or GKE On-Prem Logging and Monitoring

#include int main() { compile_c(argv[1]); } gcc Self hosting go // golang source code package main import "os" func main() { compile_go(os.Args[1:]) } go Self hosting Self hosting $

$ git clone https://github.com/spring-projects/spring-petclinic && cd spring-petclinic $ ./mvnw compile jib:build -Dimage=coollog/petclinic github.com/GoogleContainerTools/jib Project ilovejava.io/petclinic-app Containerizer github.com/GoogleContainerTools/jib Code Executable Compile github.com/GoogleContainerTools/jib Code Executable Compile Java Container Containerize github.com/GoogleContainerTools/jib build layer 1 layer 2 layer 3 total time push layer 4 github.com/GoogleContainerTools/jib Containerizing with Jib layer 1 layer 2 layer 3 build push total time layer 4 github.com/GoogleContainerTools/jib

mode • Services are organized in hash table • IPVS DNAT • conntrack/iptables SNAT • Pros • O(1) time complexity in control/data plane • Stably runs for two decades • Support rich scheduling algorithm network is idle. • Why not use a pure eBPF service? • Not mature enough eBPF brief • Write C • Compile into eBPF assembly code • Inject to kernel • Attach to network tc hooks • Triggered by ingress/egress differ • Performance of a cluster in different time slot may differ • Due to CPU oversold • Suggestion: • Run the test against the same cluster during near time • Make CPU the bottleneck • 1 CPU handles

Giri Kuncoro System Engineer Go-Jek Indonesia @girikuncoro Iqbal Farabi System Engineer Go-Jek Indonesia @iqbal_farabi We’re from Jakarta, Indonesia Ojek! Go-Jek 1.0 Call-center for ojek service service 01 2010 Milestone Go-Jek 1.0 Call-cente for ojek service 01 Mobile App First mobile app was launched 02 2010 2015 Milestone Go-Jek 1.0 Call-center for ojek service 01 Mobile App growth of Go-Pay into P2P, withdrawal, etc 03 2010 2015 2017 Milestone Go-Jek 1.0 Call-center for ojek service 01 Mobile App First mobile app was launched 02 More Apps! Incl. growth of Go-Pay

Kubernetes kops Kris Nova About Me Kris Nova “I work in the cloud...” Kris Nova In my free time I help run a Kubernetes SIG.. Kris Nova . . t h a t b r i n g s a n o p e n s o u r c e c t . . Kris Nova ..to Kris Nova Microsoft ACS ..while working at... Kris Nova Kris Nova go/AUTHORS Kris Nova r/golang Thanks Renee French! Kris Nova “I speak for the software..” # -- vpc: vpc/{{ ClusterName }} dhcpOptions: dhcpOptions/{{ ClusterName }} {{ end }} Over Engineering Go in Kubernetes # --------------------------------------------------------------- # Zones (Availability

/etc/pki/ca-trust/extracted/pem/tls-ca-bundle.pem ②安装k8s二进制组件 #使用aliyun的源（如果用的是RHEL8系列的系统，也是用的el7的仓库源，因为 k8s组件是用go语言写的，直接二进制文件就可用，不需要特殊的库依赖，于是 和系统弱相关，8或9系列的系统也直接可用这些rpm软件） # cat >> /etc/yum.repos.d/k8s-ali.repo <go1.20.8", Compiler:"gc", Pla�orm:"linux/amd64"} # kubeadm config images list #查看k8s其他组件的docker镜像名，默认用 kube-flannel-ds-24�m -n kube-system I0430 11:16:34.505952 1 main.go:518] Determining IP address of default interface E0430 11:16:34.506062 1 main.go:204] Failed to find any valid interface to use: failed