容器、Docker、虛擬機，別再傻傻分不清

{"type":"doc","content":[{"type":"blockquote","content":[{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null},"content":[{"type":"text","marks":[{"type":"strong"}],"text":"摘要"},{"type":"text","text":"：容器技術起源於Linux，是一種內核虛擬化技術，提供輕量級的虛擬化，以便隔離進程和資源。儘管容器技術已經出現很久，卻是隨着Docker的出現而變得廣爲人知。"}]}]},{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null}},{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null},"content":[{"type":"text","text":"容器技術起源於Linux，是一種內核虛擬化技術，提供輕量級的虛擬化，以便隔離進程和資源。儘管容器技術已經出現很久，卻是隨着Docker的出現而變得廣爲人知。Docker是第一個使容器能在不同機器之間移植的系統。它不僅簡化了打包應用的流程，也簡化了打包應用的庫和依賴，甚至整個操作系統的文件系統能被打包成一個簡單的可移植的包，這個包可以被用來在任何其他運行Docker的機器上使用。"}]},{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null}},{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null},"content":[{"type":"text","text":"容器和虛擬機具有相似的資源隔離和分配方式，容器虛擬化了操作系統而不是硬件，更加便攜和高效。"}]},{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null}},{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null},"content":[{"type":"text","text":"圖1 容器 vs 虛擬機"}]},{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null}},{"type":"image","attrs":{"src":"https://static001.geekbang.org/infoq/e6/e6a0a7edc2ce7159605b6291ad046ea6.jpeg","alt":null,"title":null,"style":null,"href":null,"fromPaste":true,"pastePass":true}},{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null}},{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null},"content":[{"type":"text","text":"相比於使用虛擬機，容器有如下優點："}]},{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null}},{"type":"bulletedlist","content":[{"type":"listitem","content":[{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null},"content":[{"type":"text","marks":[{"type":"strong"}],"text":"更高效的利用系統資源"}]}]}]},{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null}},{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null},"content":[{"type":"text","text":"由於容器不需要進行硬件虛擬以及運行完整操作系統等額外開銷，容器對系統資源的利用率更高。無論是應用執行速度、內存損耗或者文件存儲速度，都要比傳統虛擬機技術更高效。因此，相比虛擬機技術，一個相同配置的主機，往往可以運行更多數量的應用。"}]},{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null}},{"type":"bulletedlist","content":[{"type":"listitem","content":[{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null},"content":[{"type":"text","marks":[{"type":"strong"}],"text":"更快速的啓動時間"}]}]}]},{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null}},{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null},"content":[{"type":"text","text":"傳統的虛擬機技術啓動應用服務往往需要數分鐘，而Docker容器應用，由於直接運行於宿主內核，無需啓動完整的操作系統，因此可以做到秒級、甚至毫秒級的啓動時間，大大節約了開發、測試、部署的時間。"}]},{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null}},{"type":"bulletedlist","content":[{"type":"listitem","content":[{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null},"content":[{"type":"text","marks":[{"type":"strong"}],"text":"一致的運行環境"}]}]}]},{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null}},{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null},"content":[{"type":"text","text":"開發過程中一個常見的問題是環境一致性問題。由於開發環境、測試環境、生產環境不一致，導致有些問題並未在開發過程中被發現。而Docker的鏡像提供了除內核外完整的運行時環境，確保了應用運行環境一致性。"}]},{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null}},{"type":"bulletedlist","content":[{"type":"listitem","content":[{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null},"content":[{"type":"text","marks":[{"type":"strong"}],"text":"更輕鬆的遷移"}]}]}]},{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null}},{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null},"content":[{"type":"text","text":"由於Docker確保了執行環境的一致性，使得應用的遷移更加容易。Docker可以在很多平臺上運行，無論是物理機、虛擬機，其運行結果是一致的。因此可以很輕易的將在一個平臺上運行的應用，遷移到另一個平臺上，而不用擔心運行環境的變化導致應用無法正常運行的情況。"}]},{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null}},{"type":"bulletedlist","content":[{"type":"listitem","content":[{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null},"content":[{"type":"text","marks":[{"type":"strong"}],"text":"更輕鬆的維護和擴展"}]}]}]},{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null}},{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null},"content":[{"type":"text","text":"Docker使用的分層存儲以及鏡像的技術，使得應用重複部分的複用更爲容易，也使得應用的維護更新更加簡單，基於基礎鏡像進一步擴展鏡像也變得非常簡單。此外，Docker團隊同各個開源項目團隊一起維護了大批高質量的官方鏡像，既可以直接在生產環境使用，又可以作爲基礎進一步定製，大大的降低了應用服務的鏡像製作成本。"}]},{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null}},{"type":"heading","attrs":{"align":null,"level":2},"content":[{"type":"text","text":"Docker容器典型使用流程"}]},{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null}},{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null},"content":[{"type":"text","text":"Docker容器有如下三個主要概念："}]},{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null}},{"type":"bulletedlist","content":[{"type":"listitem","content":[{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null},"content":[{"type":"text","marks":[{"type":"strong"}],"text":"鏡像"},{"type":"text","text":"：Docker鏡像裏包含了已打包的應用程序及其所依賴的環境。它包含應用程序可用的文件系統和其他元數據，如鏡像運行時的可執行文件路徑。"}]}]},{"type":"listitem","content":[{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null},"content":[{"type":"text","marks":[{"type":"strong"}],"text":"鏡像倉庫"},{"type":"text","text":"：Docker鏡像倉庫用於存放Docker鏡像，以及促進不同人和不同電腦之間共享這些鏡像。當編譯鏡像時，要麼可以在編譯它的電腦上運行，要麼可以先上傳鏡像到一個鏡像倉庫，然後下載到另外一臺電腦上並運行它。某些倉庫是公開的，允許所有人從中拉取鏡像，同時也有一些是私有的，僅部分人和機器可接入。"}]}]},{"type":"listitem","content":[{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null},"content":[{"type":"text","marks":[{"type":"strong"}],"text":"容器"},{"type":"text","text":"：Docker容器通常是一個Linux容器，它基於Docker鏡像被創建。一個運行中的容器是一個運行在Docker主機上的進程，但它和主機，以及所有運行在主機上的其他進程都是隔離的。這個進程也是資源受限的，意味着它只能訪問和使用分配給它的資源（CPU、內存等）。"}]}]}]},{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null}},{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null},"content":[{"type":"text","text":"典型的使用流程如"},{"type":"link","attrs":{"href":"https://link.zhihu.com/?target=https%3A//support.huaweicloud.com/basics-cce/kubernetes_0002.html%23kubernetes_0002__fig12227225474","title":null},"content":[{"type":"text","text":"圖2"}]},{"type":"text","text":"所示："}]},{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null}},{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null},"content":[{"type":"text","text":"圖2 Docker容器典型使用流程"}]},{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null}},{"type":"image","attrs":{"src":"https://static001.geekbang.org/infoq/53/536cfaa840f0dbf20e1deda86a6796dd.jpeg","alt":null,"title":null,"style":null,"href":null,"fromPaste":true,"pastePass":true}},{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null}},{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null},"content":[{"type":"text","text":"（1）首先開發者在開發環境機器上開發應用並製作鏡像。"}]},{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null}},{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null},"content":[{"type":"text","text":"Docker執行命令，構建鏡像並存儲在機器上。"}]},{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null}},{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null},"content":[{"type":"text","text":"（2）開發者發送上傳鏡像命令。"}]},{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null}},{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null},"content":[{"type":"text","text":"Docker收到命令後，將本地鏡像上傳到鏡像倉庫。"}]},{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null}},{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null},"content":[{"type":"text","text":"（3）開發者向生產環境機器發送運行鏡像命令。"}]},{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null}},{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null},"content":[{"type":"text","text":"生產環境機器收到命令後，Docker會從鏡像倉庫拉取鏡像到機器上，然後基於鏡像運行容器。"}]},{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null}},{"type":"heading","attrs":{"align":null,"level":2},"content":[{"type":"text","text":"使用示例"}]},{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null}},{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null},"content":[{"type":"text","text":"下面使用Docker將基於Nginx鏡像打包一個容器鏡像，並基於容器鏡像運行應用，然後推送到容器鏡像倉庫。"}]},{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null}},{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null},"content":[{"type":"text","marks":[{"type":"strong"}],"text":"安裝Docker"}]},{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null}},{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null},"content":[{"type":"text","text":"Docker幾乎支持在所有操作系統上安裝，用戶可以根據需要選擇要安裝的Docker版本。"}]},{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null}},{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null},"content":[{"type":"text","text":"在Linux操作系統下，可以使用如下命令快速安裝Docker。"}]},{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null}},{"type":"codeblock","attrs":{"lang":null},"content":[{"type":"text","text":"curl -fsSL get.docker.com -o get-docker.sh\nsh get-docker.sh"}]},{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null}},{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null},"content":[{"type":"text","text":"說明："}]},{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null}},{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null},"content":[{"type":"text","text":"CentOS 8.0操作系統使用上述腳本安裝Docker會出現問題，建議使用如下命令安裝較低版本Docker。"}]},{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null}},{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null},"content":[{"type":"text","text":"wget -O /etc/yum.repos.d/docker-ce.repo https://repo.huaweicloud.com/docker-ce/linux/centos/docker-ce.repo sudo"}]},{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null}},{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null},"content":[{"type":"text","text":"sed -i 's+download.docker.com+http://repo.huaweicloud.com/docker-ce+' /etc/yum.repos.d/docker-ce.repo"}]},{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null}},{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null},"content":[{"type":"text","text":"yum install docker-ce-18.06.3.ce -y"}]},{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null}},{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null},"content":[{"type":"text","text":"systemctl restart docker"}]},{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null}},{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null},"content":[{"type":"text","marks":[{"type":"strong"}],"text":"Docker打包鏡像"}]},{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null}},{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null},"content":[{"type":"text","text":"Docker提供了一種便捷的描述應用打包的方式，叫做Dockerfile，如下所示："}]},{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null}},{"type":"codeblock","attrs":{"lang":null},"content":[{"type":"text","text":"# 使用官方提供的Nginx鏡像作爲基礎鏡像\nFROM nginx:alpine\n\n# 執行一條命令修改Nginx鏡像index.html的內容\nRUN echo \"hello world\" > /usr/share/nginx/html/index.html\n\n# 允許外界訪問容器的80端口\nEXPOSE 80"}]},{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null}},{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null},"content":[{"type":"text","text":"執行docker build命令打包鏡像。"}]},{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null}},{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null},"content":[{"type":"text","text":"docker build -t hello ."}]},{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null}},{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null},"content":[{"type":"text","text":"其中-t表示給鏡像加一個標籤，也就是給鏡像取名，這裏鏡像名爲hello。. 表示在當前目錄下執行該打包命令。"}]},{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null}},{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null},"content":[{"type":"text","text":"執行docker images命令查看鏡像，可以看到hello鏡像已經創建成功。您還可以看到一個Nginx鏡像，這個鏡像是從鏡像倉庫下載下來的，作爲hello鏡像的基礎鏡像使用。"}]},{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null}},{"type":"codeblock","attrs":{"lang":null},"content":[{"type":"text","text":"# docker images\nREPOSITORY TAG IMAGE ID CREATED SIZE\nhello latest d120ec16dcea 17 minutes ago 158MB\nnginx alpine eeb27ee6b893 2 months ago 148MB"}]},{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null}},{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null},"content":[{"type":"text","marks":[{"type":"strong"}],"text":"本地運行容器鏡像"}]},{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null}},{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null},"content":[{"type":"text","text":"有了鏡像後，您可以在本地執行docker run命令運行容器鏡像。"}]},{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null}},{"type":"codeblock","attrs":{"lang":null},"content":[{"type":"text","text":"# docker run -p 8080:80 hello"}]},{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null}},{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null},"content":[{"type":"text","text":"docker run命令會啓動一個容器，命令中-p是將本地機器的8080端口映射到容器的80端口，即本地機器的8080端口的流量會映射到容器的80端口，當您在本地機器訪問 http://127.0.0.1:8080時，就會訪問到容器中，此時瀏覽器中返回的內容應該就是“hello world”。"}]},{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null}},{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null},"content":[{"type":"text","text":"把鏡像推送到鏡像倉庫"}]},{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null}},{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null},"content":[{"type":"text","text":"華爲雲提供了容器鏡像服務SWR，您也可以將鏡像上傳到SWR，下面演示如何將鏡像推送到SWR。詳細的方法請參見客戶端上傳鏡像，本文檔後續的示例中將主要使用SWR作爲示例。"}]},{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null}},{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null},"content":[{"type":"text","text":"首先登錄SWR控制檯，在左側選擇“我的鏡像”，然後單擊右側“客戶端上傳鏡像”，在彈出的窗口中單擊“生成臨時登錄指令”，然後複製該指令在本地機器上執行，登錄到SWR鏡像倉庫。"}]},{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null}},{"type":"image","attrs":{"src":"https://static001.geekbang.org/infoq/59/596c5b37e9994ab5ced00f98013990f9.jpeg","alt":null,"title":null,"style":null,"href":null,"fromPaste":true,"pastePass":true}},{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null}},{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null},"content":[{"type":"text","text":"上傳鏡像前需要給鏡像取一個完整的名稱，如下所示："}]},{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null}},{"type":"codeblock","attrs":{"lang":null},"content":[{"type":"text","text":"# docker tag hello swr.cn-east-3.myhuaweicloud.com/container/hello:v1"}]},{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null}},{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null},"content":[{"type":"text","text":"這裏http://swr.cn-east-3.myhuaweicloud.com是倉庫地址，每個華爲雲區域的地址不同，v1則是hello鏡像分配的版本號。"}]},{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null}},{"type":"bulletedlist","content":[{"type":"listitem","content":[{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null},"content":[{"type":"text","text":"http://swr.cn-east-3.myhuaweicloud.com是倉庫地址，每個華爲雲區域的地址不同。"}]}]},{"type":"listitem","content":[{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null},"content":[{"type":"text","text":"container是組織名，組織一般在SWR中創建，如果沒有創建則首次上傳的時候會自動創建，組織名在單個區域內全局唯一，需要選擇合適的組織名稱。"}]}]},{"type":"listitem","content":[{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null},"content":[{"type":"text","text":"v1則是hello鏡像分配的版本號。"}]}]}]},{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null}},{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null},"content":[{"type":"text","text":"然後執行docker push命令就可以將鏡像上傳到SWR。"}]},{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null}},{"type":"codeblock","attrs":{"lang":null},"content":[{"type":"text","text":"# docker push swr.cn-east-3.myhuaweicloud.com/container/hello:v1"}]},{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null}},{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null},"content":[{"type":"text","text":"當需要使用該鏡像時，使用docker pull命令拉取（下載）該命令即可。"}]},{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null}},{"type":"codeblock","attrs":{"lang":null},"content":[{"type":"text","text":"# docker pull swr.cn-east-3.myhuaweicloud.com/container/hello:v1"}]},{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null}},{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null}},{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null}},{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null},"content":[{"type":"link","attrs":{"href":"https://bbs.huaweicloud.com/blogs?utm_source=infoq&utm_medium=bbs-ex&utm_campaign=other&utm_content=content","title":""},"content":[{"type":"text","text":"點擊關注，第一時間瞭解華爲雲新鮮技術~"}],"marks":[{"type":"strong"}]}]},{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null}}]}