Docker映射詳解，沒問題了！

{"type":"doc","content":[{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null}},{"type":"blockquote","content":[{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null},"content":[{"type":"text","text":"小夥伴兒們，大家好！上一篇我們瞭解到了Docker容器的操作命令——"},{"type":"link","attrs":{"href":"http://mp.weixin.qq.com/s?__biz=MzIzNzE1ODExNw==&mid=2247485291&idx=1&sn=a094a81338ddacd50974caf8765f0ec4&chksm=e8cdace1dfba25f735e5a63dee51da8f930f9898460e9d4ad41635db5b1b7ca1565ad42d12b4&scene=21#wechat_redirect","title":null},"content":[{"type":"text","text":"久等了！Docker容器常用命令"}]}]},{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null},"content":[{"type":"text","text":"今天來學習Docker端口映射！持續更新，敬請期待！"}]}]},{"type":"heading","attrs":{"align":null,"level":5},"content":[{"type":"text","text":"思維導圖："}]},{"type":"image","attrs":{"src":"https://static001.geekbang.org/infoq/85/859583d79031aeb42436e165de370d38.png","alt":null,"title":null,"style":null,"href":null,"fromPaste":true,"pastePass":true}},{"type":"heading","attrs":{"align":null,"level":2},"content":[{"type":"text","text":"1，Docker映射是什麼？"}]},{"type":"image","attrs":{"src":"https://static001.geekbang.org/infoq/92/92003e9b66e1891a59f0a899d76a6f0c.png","alt":null,"title":null,"style":null,"href":null,"fromPaste":true,"pastePass":true}},{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null},"content":[{"type":"text","text":"容器裏面運行着應用，外部需要訪問交互，涉及到容器裏面的端口和宿主機之間的映射；"}]},{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null},"content":[{"type":"text","text":"通過端口映射，我們就可以從"},{"type":"text","marks":[{"type":"strong"}],"text":"外部訪問宿主機的指定端口"},{"type":"text","text":"來訪問到"},{"type":"text","marks":[{"type":"strong"}],"text":"容器的應用"},{"type":"text","text":"；"}]},{"type":"heading","attrs":{"align":null,"level":2},"content":[{"type":"text","text":"2，如何實現Docker映射？"}]},{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null},"content":[{"type":"text","text":"這裏我們以Tomcat爲例子，我們看看如何在外部通過Docker端口映射來訪問宿主主機裏面的Tomca。"}]},{"type":"heading","attrs":{"align":null,"level":3},"content":[{"type":"text","text":"2.1，下載tomcat容器鏡像"}]},{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null},"content":[{"type":"text","text":"下載鏡像："},{"type":"codeinline","content":[{"type":"text","text":"docker pull tomcat:tag"}]},{"type":"text","text":"，不加版本號的話默認是下載最新版本"}]},{"type":"image","attrs":{"src":"https://static001.geekbang.org/infoq/2c/2c94aa131d0fa85b15dd115694021d4f.png","alt":null,"title":null,"style":null,"href":null,"fromPaste":true,"pastePass":true}},{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null},"content":[{"type":"text","text":"查看所有鏡像："},{"type":"codeinline","content":[{"type":"text","text":"docker images"}]},{"type":"text","text":"，我這裏是已經下載了三個版本的tomcat"}]},{"type":"image","attrs":{"src":"https://static001.geekbang.org/infoq/b1/b1a3111a7d4786efc925a5a5c545d5ad.png","alt":null,"title":null,"style":null,"href":null,"fromPaste":true,"pastePass":true}},{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null}},{"type":"heading","attrs":{"align":null,"level":3},"content":[{"type":"text","text":"2.2，創建並啓動tomcat容器"}]},{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null},"content":[{"type":"text","text":"創建啓動tomcat容器："},{"type":"codeinline","content":[{"type":"text","text":"docker run --name tomcat1 -d tomcat :latest"}]},{"type":"text","text":", 其中"},{"type":"codeinline","content":[{"type":"text","text":"-d"}]},{"type":"text","text":"是表示後臺運行容器，"},{"type":"codeinline","content":[{"type":"text","text":"tomcat1"}]},{"type":"text","text":"是容器名稱，"},{"type":"codeinline","content":[{"type":"text","text":"tomcat :latest"}]},{"type":"text","text":"是註明版本號"}]},{"type":"image","attrs":{"src":"https://static001.geekbang.org/infoq/4c/4c2a210274a6e7e23aba6b015b98da77.png","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":"查看正在運行的容器："},{"type":"codeinline","content":[{"type":"text","text":"docker ps"}]}]},{"type":"image","attrs":{"src":"https://static001.geekbang.org/infoq/fc/fc579c8c8e20f5a91a2e24a7c5555449.png","alt":null,"title":null,"style":null,"href":null,"fromPaste":true,"pastePass":true}},{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null},"content":[{"type":"text","text":"2.3，開放端口映射命令"}]},{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null},"content":[{"type":"text","text":"映射命令："},{"type":"codeinline","content":[{"type":"text","text":"docker run --name 容器名稱 -d -p (服務器端口):(Docker端口) image-name"}]}]},{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null},"content":[{"type":"codeinline","content":[{"type":"text","text":"--name"}]},{"type":"text","text":"：自定義容器名，不指定時，docker會自動生成一個名稱"}]},{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null},"content":[{"type":"codeinline","content":[{"type":"text","text":"-d"}]},{"type":"text","text":"：表示後臺運行容器"}]},{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null},"content":[{"type":"codeinline","content":[{"type":"text","text":"服務器端口"}]},{"type":"text","text":"：這裏的tomcat端口是8080"}]},{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null},"content":[{"type":"codeinline","content":[{"type":"text","text":"Docker端口"}]},{"type":"text","text":"：我們任意設置一個端口號，但是前提是這個端口號不能被佔用"}]},{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null},"content":[{"type":"codeinline","content":[{"type":"text","text":"image-name"}]},{"type":"text","text":"：指定運行的鏡像名稱以及Tag，這裏也可以用鏡像ID都可以的"}]},{"type":"image","attrs":{"src":"https://static001.geekbang.org/infoq/a0/a020ac18a166fe49e15f80b9a1bb7b25.png","alt":null,"title":null,"style":null,"href":null,"fromPaste":true,"pastePass":true}},{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null},"content":[{"type":"text","text":"這個時候我們的端口以及搭建好了，我們在瀏覽器中輸入服務器ip地址（查看命令:"},{"type":"codeinline","content":[{"type":"text","text":"ip addr show"}]},{"type":"text","text":"）再加上Docker端口就可以訪問了。"}]},{"type":"image","attrs":{"src":"https://static001.geekbang.org/infoq/be/beaf67999da380b4b93af85f67cece46.png","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":"結果，就這？？"}]},{"type":"image","attrs":{"src":"https://static001.geekbang.org/infoq/64/643cc1efc3f53c5c45387d116d5578e7.png","alt":null,"title":null,"style":null,"href":null,"fromPaste":true,"pastePass":true}},{"type":"heading","attrs":{"align":null,"level":3},"content":[{"type":"text","text":"2.4，關於訪問映射端口出現404問題"}]},{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null},"content":[{"type":"text","text":"這個問題相信剛開始搭建的時候應該都遇到過，我查了一下原因如下："}]},{"type":"image","attrs":{"src":"https://static001.geekbang.org/infoq/50/50fe54e4f4b1dc78af0d3464e1e1d658.png","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":"解決辦法："}]},{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null},"content":[{"type":"text","text":"我們先進入到tomcat的目錄："}]},{"type":"image","attrs":{"src":"https://static001.geekbang.org/infoq/f6/f66f33bd57164afe44b8bad363051c4a.png","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":"進入之後，修改"},{"type":"codeinline","content":[{"type":"text","text":"webapps"}]},{"type":"text","text":"爲"},{"type":"codeinline","content":[{"type":"text","text":"webapps2"}]},{"type":"text","text":"或者修改"},{"type":"codeinline","content":[{"type":"text","text":"webapps.dist"}]},{"type":"text","text":"爲"},{"type":"codeinline","content":[{"type":"text","text":"webapps"}]},{"type":"text","text":"就可以了"}]},{"type":"image","attrs":{"src":"https://static001.geekbang.org/infoq/b2/b267d628a73d1000b297ef45ff29d280.png","alt":null,"title":null,"style":null,"href":null,"fromPaste":true,"pastePass":true}},{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null}},{"type":"image","attrs":{"src":"https://static001.geekbang.org/infoq/25/25ae80dce76fc195f55322b5d2899950.png","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":"我們先來看看效果："}]},{"type":"image","attrs":{"src":"https://static001.geekbang.org/infoq/00/00989253e2d68eafe02549679f5b41e3.png","alt":null,"title":null,"style":null,"href":null,"fromPaste":true,"pastePass":true}},{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null},"content":[{"type":"text","marks":[{"type":"strong"}],"text":"3，提交運行容器成爲鏡像"}]},{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null},"content":[{"type":"text","text":"上述運行成功之後，也存在一定問題，如果不退當前容器的情況下，運行端口端口映射的tomcat是可以訪問到首頁的；但是，我們只是在這個容器中修改了 命名，我們重啓了這個容器，修改的命名就會恢復。"}]},{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null},"content":[{"type":"text","text":"爲了防止恢復問題，我們自己把修改後的鏡像映射成新的鏡像"}]},{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null},"content":[{"type":"text","text":"命令："},{"type":"codeinline","content":[{"type":"text","text":"docker commit -a=“作者名” -m=“備註” 運行時容器ID 新鏡像名稱"}]}]},{"type":"image","attrs":{"src":"https://static001.geekbang.org/infoq/49/49ef6bc37cdd5fd9d7b5af40f596b845.png","alt":null,"title":null,"style":null,"href":null,"fromPaste":true,"pastePass":true}},{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null},"content":[{"type":"text","text":"然後我們就可以用新鏡像來重新訪問映射端口的應用了"}]},{"type":"image","attrs":{"src":"https://static001.geekbang.org/infoq/9f/9f598208c521da61bdd09357a1f4eecc.png","alt":null,"title":null,"style":null,"href":null,"fromPaste":true,"pastePass":true}},{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null},"content":[{"type":"text","text":"非常方便！"}]},{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null}},{"type":"horizontalrule"},{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null},"content":[{"type":"text","text":"好了，今天就先分享到這裏了，下期繼續給大家帶來Docker的使用後續內容！更多幹貨、優質文章，歡迎關注我的原創技術公衆號~"}]},{"type":"image","attrs":{"src":"https://static001.geekbang.org/infoq/e6/e657572474a8c418a7ca95500b97e192.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}},{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null}}]}