KCM， etcd，api-server, coredns… 系统调用异常：网络请 求，内存申请，文件操 作，CGroup… 内核异常：进程调度， 内存管理，文件管理， 夯机宕机，资源异 常… 应用组件异常：线程池满，数据库连接无法获取， OOM，文件读取错误… 无法自顶向下端到端 串联导致棘手问题频 发。 Kubernetes下的可观测 Golang + eBPF实现数据采 依靠运行时汇编，将整个大型LLVM/Clang 库带入并嵌入其中  编译过程中资源用量大，对Cpu、Mem有要求  依赖内核的头包  bpf 程序跟其他的用户空间的程序没有太大区别  编译成二进制文件，可以适应不同运行环境  libbpf 扮演bpf程序装载机角色  开发人员只需要关注bpf程序的正确性和性能，不 需要关注其他依赖关系 通过Golang加载eBPF程序 01. 副标题 -I../../../../bpf/headers -D__TARGET_ARCH_x86 1、安装环境 2、写好bpf.c和bpf.h,放到指定目录 3、go generate 获取转换后的go文件 构建完整的应用可观测系统 第五部分 架构感知 JMeter testdemo1 testdemo2 Mysql Redis Kafka hcmine 节点 属性 关系 架构感

Podcasts Community blog posts Glossary Introduction to Cilium What is Cilium? Cilium is open source so�ware for transparently securing the network connec�vity between applica�on services deployed using BPF, Cilium retains the ability to transparently insert security visibility + enforcement, but does so in a way that is based on service / pod / container iden�ty (in contrast to IP address iden�fica�on microk8s.daemon-kubelet.service Install or configure kubectl . Microk8s provides a version of kubectl, so if you don’t otherwise have it installed then you can simply alias the microk8s version: snap alias

over systems and applications at a granularity and efficiency that was not possible before. It does so in a completely transparent way, without requiring the application to change in any way. eBPF is equally eBPF, Cilium retains the ability to transparently insert security visibility + enforcement, but does so in a way that is based on service / pod / container identity (in contrast to IP address identification eu-west-1 managedNodeGroups: - name: ng-1 desiredCapacity: 2 privateNetworking: true # taint nodes so that application pods are # not scheduled/executed until Cilium is deployed. # Alternatively, see

over systems and applications at a granularity and efficiency that was not possible before. It does so in a completely transparent way, without requiring the application to change in any way. eBPF is equally eBPF, Cilium retains the ability to transparently insert security visibility + enforcement, but does so in a way that is based on service / pod / container identity (in contrast to IP address identification eu-west-1 managedNodeGroups: - name: ng-1 desiredCapacity: 2 privateNetworking: true # taint nodes so that application pods are # not scheduled/executed until Cilium is deployed. # Alternatively, see

BPF, Cilium retains the ability to transparently insert security visibility + enforcement, but does so in a way that is based on service / pod / container identity (in contrast to IP address identification filesystem Restart remaining pods Once Cilium is up and running, restart all pods in kube-system so they can be managed by Cilium, similar to the steps that we have previously performed for kube- dns create and deploy an AKS cluster with the exception of specifying the Network Policy option. Doing so will still work but will result in unwanted iptables rules being installed on all of your nodes. If

over systems and applications at a granularity and efficiency that was not possible before. It does so in a completely transparent way, without requiring the application to change in any way. BPF is equally BPF, Cilium retains the ability to transparently insert security visibility + enforcement, but does so in a way that is based on service / pod / container identity (in contrast to IP address identification ments/#firewall-rules]. Please note that openshift-install doesn’t support custom firewall rules, so you will need to use one of the following scripts if you are using AWS or GCP. Azure does not need

BPF, Cilium retains the ability to transparently insert security visibility + enforcement, but does so in a way that is based on service / pod / container identity (in contrast to IP address identification cilium https://helm.cilium.io/ (optional, but recommended) Pre-load Cilium images into the kind cluster so each worker doesn’t have to pull them. docker pull cilium/cilium:v1.7.16 kind load docker-image cilium/cilium:v1 "us-west-2" region is ready Delete VPC CNI (aws-node DaemonSet) Cilium will manage ENIs instead of VPC CNI, so the aws-node DaemonSet has to be deleted to prevent conflict behavior. Note Once aws-node DaemonSet

over systems and applications at a granularity and efficiency that was not possible before. It does so in a completely transparent way, without requiring the application to change in any way. eBPF is equally eBPF, Cilium retains the ability to transparently insert security visibility + enforcement, but does so in a way that is based on service / pod / container identity (in contrast to IP address identification ments/#firewall-rules]. Please note that openshift-install doesn’t support custom firewall rules, so you will need to use one of the following scripts if you are using AWS or GCP. Azure does not need

the entire system and is highly performant, but needs to provide a stable interface to applications, so it lacks the flexibility of user space programming. Applications User space Kernel System calls workshop, with shelves, tools, and gathered lore. The shelves were great to store all sorts of materials, So that one bee could pass their product to the next. The tools would help reuse the engine's internals Mail was still slow to go through the ship’s processors, But the electrician bee had a great idea. And so the swarm replaced legacy receivers, They installed and rewired a boosted antenna. eBPF enhances networking

Network Storage node Flash Data So similar yet so different ● DoS is malicious ● Data transfer is business-critical ● We can blindly drop DoS 12 So similar yet so different ● DoS is malicious ● Data