{"id":35034,"date":"2024-10-08T14:17:44","date_gmt":"2024-10-08T07:17:44","guid":{"rendered":"http:\/\/jupitek.maudemo.vip\/index.php\/2024\/10\/08\/an-introduction-to-docker\/"},"modified":"2024-10-08T14:17:44","modified_gmt":"2024-10-08T07:17:44","slug":"an-introduction-to-docker","status":"publish","type":"post","link":"https:\/\/jupitek.maudemo.vip\/index.php\/2024\/10\/08\/an-introduction-to-docker\/","title":{"rendered":"Gi\u1edbi thi\u1ec7u v\u1ec1 Docker"},"content":{"rendered":"<h2 id=\"what-is-docker\">Docker l\u00e0 g\u00ec?<a href=\"https:\/\/www.linode.com\/docs\/guides\/introduction-to-docker\/#what-is-docker\"><\/a><\/h2>\n<p>Docker l\u00e0 m\u1ed9t c\u00f4ng c\u1ee5 cho ph\u00e9p b\u1ea1n t\u1ea1o, tri\u1ec3n khai v\u00e0 qu\u1ea3n l\u00fd c\u00e1c g\u00f3i nh\u1eb9, \u0111\u1ed9c l\u1eadp ch\u1ee9a m\u1ecdi th\u1ee9 c\u1ea7n thi\u1ebft \u0111\u1ec3 ch\u1ea1y \u1ee9ng d\u1ee5ng (m\u00e3, th\u01b0 vi\u1ec7n, th\u1eddi gian ch\u1ea1y, c\u00e0i \u0111\u1eb7t h\u1ec7 th\u1ed1ng v\u00e0 ph\u1ee5 thu\u1ed9c). C\u00e1c g\u00f3i n\u00e0y \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 container.<\/p>\n<p>M\u1ed7i container \u0111\u01b0\u1ee3c tri\u1ec3n khai v\u1edbi CPU, b\u1ed9 nh\u1edb, kh\u1ed1i I\/O v\u00e0 t\u00e0i nguy\u00ean m\u1ea1ng ri\u00eang, t\u1ea5t c\u1ea3 \u0111\u1ec1u kh\u00f4ng ph\u1ee5 thu\u1ed9c v\u00e0o m\u1ed9t h\u1ea1t nh\u00e2n v\u00e0 h\u1ec7 \u0111i\u1ec1u h\u00e0nh ri\u00eang l\u1ebb. M\u1eb7c d\u00f9 c\u00f3 th\u1ec3 d\u1ec5 d\u00e0ng so s\u00e1nh Docker v\u00e0 m\u00e1y \u1ea3o, nh\u01b0ng ch\u00fang kh\u00e1c nhau \u1edf c\u00e1ch chia s\u1ebb ho\u1eb7c ph\u00e2n b\u1ed5 t\u00e0i nguy\u00ean.<\/p>\n<p>Container gi\u00fap m\u1edf r\u1ed9ng ch\u1ee9c n\u0103ng Linode c\u1ee7a b\u1ea1n theo nhi\u1ec1u c\u00e1ch. V\u00ed d\u1ee5, b\u1ea1n c\u00f3 th\u1ec3 tri\u1ec3n khai nhi\u1ec1u phi\u00ean b\u1ea3n nginx v\u1edbi nhi\u1ec1u giai \u0111o\u1ea1n (nh\u01b0 ph\u00e1t tri\u1ec3n v\u00e0 s\u1ea3n xu\u1ea5t). Kh\u00f4ng gi\u1ed1ng nh\u01b0 tri\u1ec3n khai nhi\u1ec1u m\u00e1y \u1ea3o, c\u00e1c container \u0111\u01b0\u1ee3c tri\u1ec3n khai s\u1ebd kh\u00f4ng l\u00e0m c\u1ea1n ki\u1ec7t t\u00e0i nguy\u00ean Linode c\u1ee7a b\u1ea1n.<\/p>\n<h2 id=\"docker-images\">H\u00ecnh \u1ea3nh Docker<a href=\"https:\/\/www.linode.com\/docs\/guides\/introduction-to-docker\/#docker-images\"><\/a><\/h2>\n<p>M\u1ed7i container Docker \u0111\u01b0\u1ee3c t\u1ea1o t\u1eeb m\u1ed9t h\u00ecnh \u1ea3nh. B\u1ea1n k\u00e9o h\u00ecnh \u1ea3nh t\u1eeb m\u1ed9t s\u1ed5 \u0111\u0103ng k\u00fd Docker (ch\u1eb3ng h\u1ea1n nh\u01b0&nbsp;<a href=\"https:\/\/hub.docker.com\/\" target=\"_blank\" rel=\"noreferrer noopener\">Docker Hub<\/a>&nbsp;ch\u00ednh th\u1ee9c ) v\u00e0 s\u1eed d\u1ee5ng ch\u00fang \u0111\u1ec3 x\u00e2y d\u1ef1ng container. M\u1ed9t h\u00ecnh \u1ea3nh duy nh\u1ea5t c\u00f3 th\u1ec3 t\u1ea1o ra nhi\u1ec1u container. V\u00ed d\u1ee5: b\u1ea1n c\u00f3 th\u1ec3 s\u1eed d\u1ee5ng h\u00ecnh \u1ea3nh nginx m\u1edbi nh\u1ea5t \u0111\u1ec3 tri\u1ec3n khai m\u1ed9t container m\u00e1y ch\u1ee7 web cho:<\/p>\n<ul>\n<li>Ho\u1ea1t \u0111\u1ed9ng ph\u00e1t tri\u1ec3n web<\/li>\n<li>Ki\u1ec3m tra<\/li>\n<li>S\u1ea3n xu\u1ea5t<\/li>\n<li>\u1ee8ng d\u1ee5ng web<\/li>\n<\/ul>\n<h2 id=\"dockerfiles\">Dockerfiles<a href=\"https:\/\/www.linode.com\/docs\/guides\/introduction-to-docker\/#dockerfiles\"><\/a><\/h2>\n<p>A&nbsp;<code>Dockerfile<\/code>l\u00e0 m\u1ed9t t\u1ec7p v\u0103n b\u1ea3n ch\u1ee9a c\u00e1c l\u1ec7nh c\u1ea7n thi\u1ebft \u0111\u1ec3 l\u1eafp r\u00e1p m\u1ed9t h\u00ecnh \u1ea3nh. Sau khi Dockerfile \u0111\u01b0\u1ee3c vi\u1ebft, ng\u01b0\u1eddi qu\u1ea3n tr\u1ecb s\u1eed d\u1ee5ng&nbsp;<code>docker build<\/code>l\u1ec7nh \u0111\u1ec3 t\u1ea1o m\u1ed9t h\u00ecnh \u1ea3nh d\u1ef1a tr\u00ean c\u00e1c l\u1ec7nh trong t\u1ec7p. C\u00e1c l\u1ec7nh v\u00e0 th\u00f4ng tin trong \u0111\u00f3&nbsp;<code>Dockerfile<\/code>c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c c\u1ea5u h\u00ecnh \u0111\u1ec3 s\u1eed d\u1ee5ng c\u00e1c phi\u00ean b\u1ea3n ph\u1ea7n m\u1ec1m v\u00e0 ph\u1ee5 thu\u1ed9c c\u1ee5 th\u1ec3 \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o tri\u1ec3n khai nh\u1ea5t qu\u00e1n v\u00e0 \u1ed5n \u0111\u1ecbnh.<\/p>\n<p>Dockerfile s\u1eed d\u1ee5ng c\u00e1c l\u1ec7nh sau \u0111\u1ec3 x\u00e2y d\u1ef1ng h\u00ecnh \u1ea3nh:<\/p>\n<ul>\n<li><strong>TH\u00caM<\/strong>&nbsp;&#8211; sao ch\u00e9p c\u00e1c t\u1eadp tin t\u1eeb ngu\u1ed3n tr\u00ean m\u00e1y ch\u1ee7 sang h\u1ec7 th\u1ed1ng t\u1eadp tin ri\u00eang c\u1ee7a v\u00f9ng ch\u1ee9a t\u1ea1i \u0111\u00edch \u0111\u00e3 thi\u1ebft l\u1eadp.<\/li>\n<li><strong>CMD<\/strong>&nbsp;&#8211; th\u1ef1c hi\u1ec7n m\u1ed9t l\u1ec7nh c\u1ee5 th\u1ec3 trong v\u00f9ng ch\u1ee9a.<\/li>\n<li><strong>ENTRYPOINT<\/strong>&nbsp;&#8211; thi\u1ebft l\u1eadp m\u1ed9t \u1ee9ng d\u1ee5ng m\u1eb7c \u0111\u1ecbnh \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng m\u1ed7i khi t\u1ea1o m\u1ed9t v\u00f9ng ch\u1ee9a b\u1eb1ng h\u00ecnh \u1ea3nh.<\/li>\n<li><strong>ENV<\/strong>&nbsp;&#8211; thi\u1ebft l\u1eadp bi\u1ebfn m\u00f4i tr\u01b0\u1eddng.<\/li>\n<li><strong>EXPOSE<\/strong>&nbsp;&#8211; m\u1edf m\u1ed9t c\u1ed5ng c\u1ee5 th\u1ec3 \u0111\u1ec3 cho ph\u00e9p k\u1ebft n\u1ed1i m\u1ea1ng gi\u1eefa container v\u00e0 th\u1ebf gi\u1edbi b\u00ean ngo\u00e0i.<\/li>\n<li><strong>T\u1eea<\/strong>&nbsp;&#8211; x\u00e1c \u0111\u1ecbnh h\u00ecnh \u1ea3nh c\u01a1 s\u1edf \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 b\u1eaft \u0111\u1ea7u qu\u00e1 tr\u00ecnh x\u00e2y d\u1ef1ng.<\/li>\n<li><strong>NG\u01af\u1edcI B\u1ea2O TR\u00cc<\/strong>&nbsp;&#8211; x\u00e1c \u0111\u1ecbnh h\u1ecd t\u00ean \u0111\u1ea7y \u0111\u1ee7 v\u00e0 \u0111\u1ecba ch\u1ec9 email c\u1ee7a ng\u01b0\u1eddi t\u1ea1o h\u00ecnh \u1ea3nh.<\/li>\n<li><strong>RUN<\/strong>&nbsp;&#8211; l\u1ec7nh th\u1ef1c thi trung t\u00e2m cho Dockerfiles.<\/li>\n<li><strong>NG\u01af\u1edcI D\u00d9NG<\/strong>&nbsp;&#8211; thi\u1ebft l\u1eadp UID (t\u00ean ng\u01b0\u1eddi d\u00f9ng) s\u1ebd ch\u1ea1y v\u00f9ng ch\u1ee9a.<\/li>\n<li><strong>VOLUME<\/strong>&nbsp;&#8211; cho ph\u00e9p truy c\u1eadp t\u1eeb v\u00f9ng ch\u1ee9a \u0111\u1ebfn m\u1ed9t th\u01b0 m\u1ee5c tr\u00ean m\u00e1y ch\u1ee7.<\/li>\n<li><strong>WORKDIR<\/strong>&nbsp;&#8211; thi\u1ebft l\u1eadp \u0111\u01b0\u1eddng d\u1eabn n\u01a1i l\u1ec7nh \u0111\u01b0\u1ee3c x\u00e1c \u0111\u1ecbnh b\u1eb1ng CMD s\u1ebd \u0111\u01b0\u1ee3c th\u1ef1c thi.<\/li>\n<\/ul>\n<p>Kh\u00f4ng ph\u1ea3i l\u1ec7nh n\u00e0o c\u0169ng ph\u1ea3i \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng. D\u01b0\u1edbi \u0111\u00e2y l\u00e0 v\u00ed d\u1ee5 Dockerfile \u0111ang ho\u1ea1t \u0111\u1ed9ng, ch\u1ec9 s\u1eed d\u1ee5ng c\u00e1c l\u1ec7nh&nbsp;<code>MAINTAINER<\/code>,&nbsp;<code>FROM<\/code>, v\u00e0&nbsp;<code>RUN<\/code>:<\/p>\n<pre class=\"wp-block-code\"><code>MAINTAINER NAME EMAIL\nFROM ubuntu:latest\nRUN apt-get -y update &amp;&amp; apt-get -y upgrade &amp;&amp; apt-get install -y build-essential<\/code><\/pre>\n<h2 id=\"docker-swarm\">Docker SWARM<\/h2>\n<p>Docker gi\u00fap d\u1ec5 d\u00e0ng k\u1ebft n\u1ed1i c\u00e1c m\u00e1y ch\u1ee7 l\u1ea1i v\u1edbi nhau \u0111\u1ec3 t\u1ea1o th\u00e0nh m\u1ed9t c\u1ee5m, \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 Docker Swarm. Sau khi b\u1ea1n \u0111\u00e3 t\u1ea1o m\u1ed9t tr\u00ecnh qu\u1ea3n l\u00fd Swarm ho\u1eb7c&nbsp;<em>leader<\/em>&nbsp;v\u00e0 \u0111\u00ednh k\u00e8m c\u00e1c n\u00fat v\u00e0o leader, b\u1ea1n c\u00f3 th\u1ec3 m\u1edf r\u1ed9ng tri\u1ec3n khai container. Leader s\u1ebd t\u1ef1 \u0111\u1ed9ng \u0111i\u1ec1u ch\u1ec9nh c\u1ee5m b\u1eb1ng c\u00e1ch th\u00eam ho\u1eb7c x\u00f3a c\u00e1c t\u00e1c v\u1ee5 \u0111\u1ec3 duy tr\u00ec tr\u1ea1ng th\u00e1i mong mu\u1ed1n.<\/p>\n<p>M\u1ed9t&nbsp;<em>n\u00fat<\/em>&nbsp;l\u00e0 m\u1ed9t phi\u00ean b\u1ea3n duy nh\u1ea5t c\u1ee7a c\u00f4ng c\u1ee5 Docker tham gia v\u00e0o Swarm. B\u1ea1n c\u00f3 th\u1ec3 ch\u1ea1y m\u1ed9t ho\u1eb7c nhi\u1ec1u n\u00fat tr\u00ean m\u1ed9t Linode duy nh\u1ea5t. Tr\u00ecnh qu\u1ea3n l\u00fd Swarm s\u1eed d\u1ee5ng c\u00e2n b\u1eb1ng t\u1ea3i \u0111\u1ea7u v\u00e0o \u0111\u1ec3 hi\u1ec3n th\u1ecb c\u00e1c d\u1ecbch v\u1ee5 c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c cung c\u1ea5p cho Swarm. Docker Swarm c\u0169ng c\u00f3 th\u1ec3:<\/p>\n<ul>\n<li>Ki\u1ec3m tra t\u00ecnh tr\u1ea1ng c\u1ee7a th\u00f9ng ch\u1ee9a.<\/li>\n<li>Kh\u1edfi ch\u1ea1y m\u1ed9t t\u1eadp h\u1ee3p c\u00e1c container c\u1ed1 \u0111\u1ecbnh t\u1eeb m\u1ed9t h\u00ecnh \u1ea3nh Docker duy nh\u1ea5t.<\/li>\n<li>T\u0103ng ho\u1eb7c gi\u1ea3m s\u1ed1 l\u01b0\u1ee3ng container (t\u00f9y thu\u1ed9c v\u00e0o t\u1ea3i hi\u1ec7n t\u1ea1i).<\/li>\n<li>Th\u1ef1c hi\u1ec7n c\u1eadp nh\u1eadt li\u00ean t\u1ee5c tr\u00ean c\u00e1c v\u00f9ng ch\u1ee9a.<\/li>\n<li>Cung c\u1ea5p kh\u1ea3 n\u0103ng d\u1ef1 ph\u00f2ng v\u00e0 chuy\u1ec3n \u0111\u1ed5i d\u1ef1 ph\u00f2ng.<\/li>\n<li>Th\u00eam ho\u1eb7c b\u1edbt s\u1ed1 l\u1ea7n l\u1eb7p l\u1ea1i c\u1ee7a container khi nhu c\u1ea7u thay \u0111\u1ed5i.<\/li>\n<\/ul>\n<h2 id=\"next-steps\">C\u00e1c b\u01b0\u1edbc ti\u1ebfp theo<a href=\"https:\/\/www.linode.com\/docs\/guides\/introduction-to-docker\/#next-steps\"><\/a><\/h2>\n<p>\u0110\u1ec3 kh\u00e1m ph\u00e1 Docker s\u00e2u h\u01a1n, h\u00e3y truy c\u1eadp&nbsp;<a href=\"https:\/\/www.linode.com\/docs\/guides\/docker-commands-quick-reference-cheat-sheet\/\">T\u00e0i li\u1ec7u tham kh\u1ea3o nhanh v\u1ec1 Docker<\/a>&nbsp;, h\u01b0\u1edbng d\u1eabn&nbsp;<a href=\"https:\/\/www.linode.com\/docs\/guides\/node-js-web-server-deployed-within-docker\/\">tri\u1ec3n khai m\u00e1y ch\u1ee7 web Node.js<\/a>&nbsp;ho\u1eb7c h\u01b0\u1edbng d\u1eabn&nbsp;<a href=\"https:\/\/www.linode.com\/docs\/guides\/how-to-install-docker-and-deploy-a-lamp-stack\/\">C\u00e1ch c\u00e0i \u0111\u1eb7t Docker v\u00e0 tri\u1ec3n khai LAMP Stack<\/a>&nbsp;c\u1ee7a Linode .<\/p>\n<h2 id=\"more-information\">Th\u00f4ng tin th\u00eam<\/h2>\n<p>B\u1ea1n c\u00f3 th\u1ec3 mu\u1ed1n tham kh\u1ea3o c\u00e1c ngu\u1ed3n sau \u0111\u1ec3 bi\u1ebft th\u00eam th\u00f4ng tin v\u1ec1 ch\u1ee7 \u0111\u1ec1 n\u00e0y. M\u1eb7c d\u00f9 ch\u00fang t\u00f4i cung c\u1ea5p v\u1edbi hy v\u1ecdng r\u1eb1ng ch\u00fang s\u1ebd h\u1eefu \u00edch, nh\u01b0ng xin l\u01b0u \u00fd r\u1eb1ng ch\u00fang t\u00f4i kh\u00f4ng th\u1ec3 \u0111\u1ea3m b\u1ea3o t\u00ednh ch\u00ednh x\u00e1c ho\u1eb7c t\u00ednh k\u1ecbp th\u1eddi c\u1ee7a c\u00e1c t\u00e0i li\u1ec7u \u0111\u01b0\u1ee3c l\u01b0u tr\u1eef b\u00ean ngo\u00e0i.<\/p>\n<ul>\n<li><a href=\"http:\/\/docs.docker.com\/\" target=\"_blank\" rel=\"noreferrer noopener\">T\u00e0i li\u1ec7u Docker<\/a><\/li>\n<li><a href=\"https:\/\/www.docker.com\/tryit\/\" target=\"_blank\" rel=\"noreferrer noopener\">H\u01b0\u1edbng d\u1eabn s\u1eed d\u1ee5ng Docker<\/a><\/li>\n<li><a href=\"https:\/\/hub.docker.com\/\" target=\"_blank\" rel=\"noreferrer noopener\">Trung t\u00e2m Docker<\/a><\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>Docker l\u00e0 g\u00ec? Docker l\u00e0 m\u1ed9t c\u00f4ng c\u1ee5 cho ph\u00e9p b\u1ea1n t\u1ea1o, tri\u1ec3n khai v\u00e0 qu\u1ea3n l\u00fd c\u00e1c g\u00f3i nh\u1eb9, \u0111\u1ed9c l\u1eadp ch\u1ee9a m\u1ecdi th\u1ee9 c\u1ea7n thi\u1ebft \u0111\u1ec3 ch\u1ea1y \u1ee9ng d\u1ee5ng (m\u00e3, th\u01b0 vi\u1ec7n, th\u1eddi gian ch\u1ea1y, c\u00e0i \u0111\u1eb7t h\u1ec7 th\u1ed1ng v\u00e0 ph\u1ee5 thu\u1ed9c). C\u00e1c g\u00f3i n\u00e0y \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 container. M\u1ed7i container \u0111\u01b0\u1ee3c tri\u1ec3n<\/p>\n","protected":false},"author":1,"featured_media":36263,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[108],"tags":[],"class_list":["post-35034","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-containers"],"_links":{"self":[{"href":"https:\/\/jupitek.maudemo.vip\/index.php\/wp-json\/wp\/v2\/posts\/35034","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/jupitek.maudemo.vip\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/jupitek.maudemo.vip\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/jupitek.maudemo.vip\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/jupitek.maudemo.vip\/index.php\/wp-json\/wp\/v2\/comments?post=35034"}],"version-history":[{"count":0,"href":"https:\/\/jupitek.maudemo.vip\/index.php\/wp-json\/wp\/v2\/posts\/35034\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/jupitek.maudemo.vip\/index.php\/wp-json\/wp\/v2\/media\/36263"}],"wp:attachment":[{"href":"https:\/\/jupitek.maudemo.vip\/index.php\/wp-json\/wp\/v2\/media?parent=35034"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/jupitek.maudemo.vip\/index.php\/wp-json\/wp\/v2\/categories?post=35034"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/jupitek.maudemo.vip\/index.php\/wp-json\/wp\/v2\/tags?post=35034"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}