[{"_1":2,"_161":-5,"_162":-5},"loaderData",{"_3":4,"_17":18,"_25":26,"_140":141},"root",{"_5":-5,"_6":-7,"_7":8,"_9":-7,"_10":11,"_12":-7,"_13":14,"_15":16},"currentUser","primaryEmail","siteVerification","6LeIxAcTAAAAAJcZVRqyHh71UMIEGNQ_MXjiZKhI","toast","enableDev",false,"incidentStatus","theme","system","contrast","normal","routes/_layout",{"_19":-5,"_20":21,"_22":21,"_23":11,"_24":21},"username","isAskGordonEnabled",true,"isUsingNewTemplate","showMinimalLanding","showHoneypotTrap","routes/_layout.r.$namespace.$reponame",{"_27":28,"_29":-5,"_30":11,"_31":11,"_32":33,"_34":35,"_36":-5,"_37":11,"_38":39,"_88":-5,"_89":90,"_129":-5,"_130":11,"_131":21,"_132":11,"_133":-5,"_134":11,"_135":-5,"_136":137,"_138":91,"_139":-7},"canonicalUrl","https://hub.docker.com/r/wxh16144/learn-docker-env/tags","mcpServer","canSeeDockerfile","canSeeAutobuilds","namespace","wxh16144","reponame","learn-docker-env","cloudBuildSource","isAutobuildsAvailable","repo",{"_40":41,"_42":43,"_45":46,"_47":48,"_49":11,"_50":51,"_52":53,"_54":55,"_57":35,"_32":33,"_58":59,"_60":44,"_61":62,"_63":64,"_65":66,"_67":-5,"_68":62,"_69":70,"_71":11,"_72":33,"_73":74,"_79":11,"_80":81,"_85":33,"_86":87},"categories",[],"content_types",[44],"image","date_registered","2024-10-09T11:47:36.50004Z","description","","is_private","last_updated","2024-10-09T11:47:36.566289Z","last_modified","2024-10-16T13:48:34.145251Z","media_types",[56],"application/vnd.docker.container.image.v1+json","name","pull_count",870,"repository_type","star_count",0,"status",1,"status_description","active","source","collaborator_count","full_description","# learn-docker-env\n\n> 一个简单的项目，学习多种方式向 Docker 容器中传递环境变量\n\n## 构建/拉取镜像\n\n```bash\ndocker build -t wxh16144/learn-docker-env:latest . # <= 注意最后的点\n# or\ndocker pull wxh16144/learn-docker-env:latest # <= 从 Docker Hub 拉取\n```\n\n## 1. 通过 docker run 命令行参数传递环境变量\n\n```bash\ndocker run --rm -it -e MY_FOO=bar wxh16144/learn-docker-env:latest\n```\n\n

查看输出

\n \n ```log\n➜ docker run --rm -it -e MY_FOO=bar wxh16144/learn-docker-env:latest\n============================================================================\n========================== ENVIRONMENT VARIABLES ===========================\n============================================================================\nHOSTNAME=83479b1e89e0\nMY_FOO=bar\nSHLVL=1\nHOME=/root\nTERM=xterm\nPATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin\nPWD=/app\n============================================================================\n========================== END OF ENVIRONMENT VARIABLES ====================\n============================================================================\nContainer is running. Press Ctrl+C to exit.\n\n ```\n \n

\n\n## 2. 通过 docker-compose.yml 中的 environment 传递环境变量\n\n_docker-compose.yml_\n\n```yaml\nservices:\n learn-docker-env:\n image: wxh16144/learn-docker-env:latest\n environment:\n MY_BAR: bar\n```\n\n

查看输出

\n \n ```log\n============================================================================\n========================== ENVIRONMENT VARIABLES ===========================\n============================================================================\nHOSTNAME=42f8af0b7093\nSHLVL=1\nHOME=/root\nPATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin\nMY_BAR=bar\nPWD=/app\n============================================================================\n========================== END OF ENVIRONMENT VARIABLES ====================\n============================================================================\nContainer is running. Press Ctrl+C to exit.\n\n ```\n\n

\n\n## 3. 通过 docker-compose.yml 中的 .env 文件传递环境变量\n\n_.env_\n\n```ini\nMY_BAZ=bar\n```\n\n_docker-compose.yml_\n\n```yaml\nservices:\n learn-docker-env:\n image: wxh16144/learn-docker-env:latest\n env_file:\n - .env\n```\n\n

查看输出

\n \n ```log\n============================================================================\n========================== ENVIRONMENT VARIABLES ===========================\n============================================================================\nHOSTNAME=bdda7aa8cd0e\nSHLVL=1\nHOME=/root\nPATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin\nPWD=/app\nMY_BAZ=bar\n============================================================================\n========================== END OF ENVIRONMENT VARIABLES ====================\n============================================================================\nContainer is running. Press Ctrl+C to exit.\n\n ```\n\n

\n\n## 其他\n\n### 将宿主机的以 `MY_` 开头的环境变量传递给容器\n\n```bash\ndocker run -it --rm \\\n $(printenv | grep '^MY_' | sed 's/^/-e /') \\\n wxh16144/learn-docker-env:latest\n```\n\n1. `printenv | grep '^MY_'`：获取所有以 `MY_` 开头的环境变量。\n2. `sed 's/^/-e /'`：在每个环境变量前面加上 `-e` 选项，以便 `docker run` 能够识别它们。\n\n### docker-compose 中使用插值法\n\n> Read more: [Environment variables in Compose](https://docs.docker.com/compose/how-tos/environment-variables/)\n\n_docker-compose.yml_\n\n```yaml\nservices:\n learn-docker-env:\n image: wxh16144/learn-docker-env:latest\n environment:\n MY_FOO: ${MY_FOO：default}\n```\n","has_starred","hub_user","immutable_tags_settings",{"_75":11,"_76":77},"enabled","rules",[78],".*","is_automated","permissions",{"_82":21,"_83":11,"_84":11},"read","write","admin","user","storage_size",4944503,"orgData","recentTags",[91],{"_92":44,"_93":94,"_95":96,"_97":98,"_99":100,"_101":102,"_50":118,"_119":94,"_120":33,"_121":56,"_57":122,"_123":124,"_125":108,"_126":118,"_127":66,"_128":21},"content_type","creator",10692747,"digest","sha256:c42ddbcd1ac47a9e6368ea42c74d8649f15fdea27c89ca5816b71f326d888a4a","full_size",4941485,"id",771495289,"images",[103],{"_104":105,"_95":96,"_106":48,"_107":108,"_109":110,"_111":112,"_113":48,"_114":-5,"_115":98,"_63":66,"_116":117},"architecture","arm64","features","last_pulled","2026-10-04T14:46:14.143644447Z","last_pushed","2024-10-09T11:47:36Z","os","linux","os_features","os_version","size","variant","v8","2024-10-09T11:47:35.588075Z","last_updater","last_updater_username","media_type","latest","repository",25335236,"tag_last_pulled","tag_last_pushed","tag_status","v2","sbxKitMetadata","isPotentialSpam","isHubSbxKitsEnabled","showSbxLogoOverride","sbxTrademarkText","displaySecurityMetadata","tagAttestations","tagsHaveAttestations",[],"selectedTag","attestationsUrl","routes/_layout.r.$namespace.$reponame.tags",{"_38":142,"_149":150,"_136":159,"_160":11},{"_40":143,"_42":144,"_45":46,"_47":48,"_49":11,"_50":51,"_52":53,"_54":145,"_57":35,"_32":33,"_58":59,"_60":44,"_61":62,"_63":64,"_65":66,"_67":-5,"_68":62,"_69":70,"_71":11,"_72":33,"_73":146,"_79":11,"_80":148,"_85":33,"_86":87},[],[44],[56],{"_75":11,"_76":147},[78],{"_82":21,"_83":11,"_84":11},"tags",{"_151":64,"_152":-5,"_153":-5,"_154":155},"count","next","previous","results",[156],{"_92":44,"_93":94,"_95":96,"_97":98,"_99":100,"_101":157,"_50":118,"_119":94,"_120":33,"_121":56,"_57":122,"_123":124,"_125":108,"_126":118,"_127":66,"_128":21},[158],{"_104":105,"_95":96,"_106":48,"_107":108,"_109":110,"_111":112,"_113":48,"_114":-5,"_115":98,"_63":66,"_116":117},[],"canDeleteTags","actionData","errors"]

wxh16144/learn-docker-env

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