MOPCON
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    # 為什麼 K8s 如此火紅? - 楊秉諺 {%hackmd MNcuRlXoQDak0uCmtaJKwA %} ###### tags: `MOPCON 2019` ## Kubernets + 目前 K8s 的服務有許多雲服務的平台皆有提供。 + IaaS(基礎設施即服務) > 講者提到一開始接觸 Kubernets 時,因為該技術有太多專有名詞,所以在一開始的學習上有稍微碰到壁。 ## Zen project + 遇到的問題 + 流量變大,單點失敗。因為 Server 架構設計上算是偏向垂直設計。 + 解決的方式 + 將 server 架構往水平設計發展。 > 這部分說明了 Layer 4 及 Layer 7(for ingress) 的 load balancer 服務。 + Kubernets 會火紅原因 1. 優秀的基礎設施抽象能力 2. K8s 生態系可將原本雲服務提供的服務一一解決 + Pod 概念 + Pod 為眾多 service(docker) 集合為一體的單位。 + 將 Nginx 及 Memcache 設為相同的內網 + 管理方式: + Deployment + StashfulSet + daemonSet + 一個 Node 就是一台實體機,而 daemonSet 則是保證說每個 Node 會有一個 Pod。而這部分會讓每個 Node 連線到各自的 Pod。 ## 要讓他覺得架在K8s上 - Server:no selector + Serverless Service (PaaS) + 負載平衡 + 自動調整規模 + 應用程式運作狀態監控的部署 > 一般在建置 server 時通常都需要考慮上述三點。然而,在 Serverless 中,是不用特別去擔心這三點的。 > 這部分可以使用 「Knative(Container base)」的服務來解決。且 K8s 有提供 Ecosystem 的服務。 可將應用程式服務導入至K8s + Container 管理系統 1. 工作描述(yaml, json) 2. 資源調度 3. 管理 container 運行 4. 資源使用狀態監測 > 目前各大提供 K8s 皆有提供介面操作的功能,讓 K8s 易於擴展。 Migrate for Anthos (2019) AWS和Micorsoft Azure可以直接遷移到GKE ## 結論 + 將基礎設施用描述黨來配置 + 多雲支援跨雲不受限 + K8s Ecosystems(Cloud Native) + 對雲端服務提供商介面化架構更易於整合其現有系統 本篇筆記有許多缺少部分

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