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    # Istio-Powered Observability - Neeraj Pandey {%hackmd @DevOpsDay/B1cnefOI0 %} #### 》[議程介紹](https://devopsdays.tw/2024/speaker-page/1495) #### 》[收看即時AI翻譯字幕|Watch AI-translated subtitles](https://attend.wordly.ai/join/KEXN-4752) #### 》[填寫議程滿意度問卷|回饋建言給辛苦的講者](https://forms.gle/kv32GLDaEkxUzD8k6) #### 》[簡報] (http://n4jp4y.com) > 共筆從這開始 # WHat are we learning? 本次議程會從微服務架構的工作原理開始進行基本的介紹, 以及介紹 k8s, 以及為什麼需要 service mesh ## 單體服務的跳戰 - 單點失敗 - 部署依賴複雜性 - 系統擴展困難 ## VM 的出現 VM的出現能使得硬體的資源拆分更加便利. ### Docker Docker的出現使得自己的服務能在虛擬化的環境內運行 ### Docker 出現的挑戰 Docker 很容易擴展, 導致系統節點非常多無法簡單的備份上面的資料或修改配置. 且難以管理. ## K8S 用以管理容器, 自動化部屬容器, 提供自我修復能力, 以及服務發現的能力 ### Architecture Master node 與 Worket nodes Master node 有 api server , scheduler, controller manager 以及 etcd 主要是提供給維運人員管理使用. ### K8s 好處 資源利用更有效率 自動部署以及擴展 高可用以及提供系統一定的韌性 可攜性以及管理的彈性 #### 服務間溝通的邏輯 - 服務發現 - retry, - 負載均衡 #### 安全性問題 - 授權 - 驗證 - 加密 這麼複雜的架構下, 人力可行的可觀測性有限, 因此當知道服務回應很慢時 怎樣確定是哪個服務正在負責這請求? ## 自主建置與管理系統的挑戰 - increased complexity - maintenance overhead - scalability issues # Service Mesh > A communication layer for microsevices - service discovery and routing - security enforcement - enhanced o11y ## service mesh 架構 每個容器中的服務都都會經過 sidecar proxy, 他會劫持所有請求, 來處理以上的一些事情. 因此有service mesh 的配置中, proxy就是一個data layer 能處理不同事物上的所有資料 ## Istio 是一種 service mesh 使用 Envoy 作為 proxy 來劫持請求. ## ISTIO 能使用的可觀測性工具 - Kiali - 監測 service mesh - Jaeger - - Grafana - 監測整體系統 ## how do we config istio? - CRD : 使我們能自訂義以及管理istio 的一些設定與配置.使用 YAML 格式撰寫給 k8s 使用. - traffic management - o11y setup ----- 共筆聊天室 ###### tags: `DevOpsDays Taipei 2024`

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