Docker Mastery: Section 4 - The Mighty Hub
Tags: docker-image, udemy-docker
- section3-36, 37, 38
Udemy
Lecture
- Find Official and other good public images
- Download images and basics of image tags
- https://hub.docker.com
Docke Hub
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Official Image
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EX: nginx
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Tags
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一行一行的
Tags其實都抓一樣的:-
docker pull ngxin:latest==docker pull nginx:1.17.6 -
都是抓一樣的 image
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PS E:\> docker pull nginx:latest latest: Pulling from library/nginx Digest: sha256:50cf965a6e08ec5784009d0fccb380fc479826b6e0e65684d9879170a9df8566 Status: Image is up to date for nginx:latest docker.io/library/nginx:latest PS E:\> docker pull nginx:1.17.6 1.17.6: Pulling from library/nginx Digest: sha256:50cf965a6e08ec5784009d0fccb380fc479826b6e0e65684d9879170a9df8566 Status: Downloaded newer image for nginx:1.17.6 docker.io/library/nginx:1.17.6
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show 本機的 images
PS E:\> docker image ls REPOSITORY TAG IMAGE ID CREATED SIZE alpine latest c85b8f829d1f 7 days ago 5.59MB ubuntu 14.04 6e4f1fe62ff1 7 days ago 197MB nginx latest 231d40e811cd 4 weeks ago 126MB nginx alpine a624d888d69f 5 weeks ago 21.5MB centos 7 5e35e350aded 6 weeks ago 203MB centos latest 0f3e07c0138f 2 months ago 220MB tim23656/cheers2019 latest 21660382562c 3 months ago 4.01MB <none> <none> cbaa020e0b1c 3 months ago 356MB golang 1.11-alpine e116d2efa2ab 4 months ago 312MB vulnerables/web-dvwa latest ab0d83586b6e 14 months ago 712MB elasticsearch 2 5e9d896dc62c 15 months ago 479MB -
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download latest
docker pull nginx
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Docker Hub Explore
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GitHub: Official Images
Images and Their Layers
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docker history <image-name:tags>- show layers of changes made in image
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PS E:\> docker history nginx:latest IMAGE CREATED CREATED BY SIZE COMMENT 231d40e811cd 4 weeks ago /bin/sh -c #(nop) CMD ["nginx" "-g" "daemon… 0B <missing> 4 weeks ago /bin/sh -c #(nop) STOPSIGNAL SIGTERM 0B <missing> 4 weeks ago /bin/sh -c #(nop) EXPOSE 80 0B <missing> 4 weeks ago /bin/sh -c ln -sf /dev/stdout /var/log/nginx… 22B <missing> 4 weeks ago /bin/sh -c set -x && addgroup --system -… 57.1MB <missing> 4 weeks ago /bin/sh -c #(nop) ENV PKG_RELEASE=1~buster 0B <missing> 4 weeks ago /bin/sh -c #(nop) ENV NJS_VERSION=0.3.7 0B <missing> 4 weeks ago /bin/sh -c #(nop) ENV NGINX_VERSION=1.17.6 0B <missing> 4 weeks ago /bin/sh -c #(nop) LABEL maintainer=NGINX Do… 0B <missing> 4 weeks ago /bin/sh -c #(nop) CMD ["bash"] 0B <missing> 4 weeks ago /bin/sh -c #(nop) ADD file:bc8179c87c8dbb3d9… 69.2MB
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docker image inspect <image-name:tags>- retruns JSON metadata about the image
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PS E:\> docker image inspect nginx [ { "Id": "sha256:231d40e811cd970168fb0c4770f2161aa30b9ba6fe8e68527504df69643aa145", "RepoTags": [ "nginx:1.17.6", "nginx:latest" ], "RepoDigests": [ "nginx@sha256:50cf965a6e08ec5784009d0fccb380fc479826b6e0e65684d9879170a9df8566" ], "Parent": "", "Comment": "", "Created": "2019-11-23T01:12:31.219881158Z", "Container": "806a0a78bcfee5212b2530e6f2a7e3f8eec5b51cc55d7a28935f5f8c8bd45826", "ContainerConfig": { "Hostname": "806a0a78bcfe", "Domainname": "", "User": "", "AttachStdin": false, "AttachStdout": false, "AttachStderr": false, "ExposedPorts": { "80/tcp": {} }, "Tty": false, "OpenStdin": false, "StdinOnce": false, "Env": [ "PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin", "NGINX_VERSION=1.17.6", "NJS_VERSION=0.3.7", "PKG_RELEASE=1~buster" ], "Cmd": [ "/bin/sh", "-c", "#(nop) ", "CMD [\"nginx\" \"-g\" \"daemon off;\"]" ], "ArgsEscaped": true, "Image": "sha256:f96d70a1d708239afa79b86f1e005c033864d22dabe94b466acba087d5bbc722", "Volumes": null, "WorkingDir": "", "Entrypoint": null, "OnBuild": null, "Labels": { "maintainer": "NGINX Docker Maintainers <docker-maint@nginx.com>" }, "StopSignal": "SIGTERM" }, "DockerVersion": "18.06.1-ce", "Author": "", "Config": { "Hostname": "", "Domainname": "", "User": "", "AttachStdin": false, "AttachStdout": false, "AttachStderr": false, "ExposedPorts": { "80/tcp": {} }, "Tty": false, "OpenStdin": false, "StdinOnce": false, "Env": [ "PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin", "NGINX_VERSION=1.17.6", "NJS_VERSION=0.3.7", "PKG_RELEASE=1~buster" ], "Cmd": [ "nginx", "-g", "daemon off;" ], "ArgsEscaped": true, "Image": "sha256:f96d70a1d708239afa79b86f1e005c033864d22dabe94b466acba087d5bbc722", "Volumes": null, "WorkingDir": "", "Entrypoint": null, "OnBuild": null, "Labels": { "maintainer": "NGINX Docker Maintainers <docker-maint@nginx.com>" }, "StopSignal": "SIGTERM" }, "Architecture": "amd64", "Os": "linux", "Size": 126323486, "VirtualSize": 126323486, "GraphDriver": { "Data": { "LowerDir": "/var/lib/docker/overlay2/da1b070a8bcd06dd725a8e53bfa712146c1af8127f4e80e6d3523c8acfa2a254/diff:/var/lib/docker/overlay2/03096a618330d9f22cefaab64d5bddd0417aa5021ee03e86a7da858776cfb226/diff", "MergedDir": "/var/lib/docker/overlay2/fcd37a00bf6824fbfbc984dac76d2decd20830068c9e6a001b59878dd0059050/merged", "UpperDir": "/var/lib/docker/overlay2/fcd37a00bf6824fbfbc984dac76d2decd20830068c9e6a001b59878dd0059050/diff", "WorkDir": "/var/lib/docker/overlay2/fcd37a00bf6824fbfbc984dac76d2decd20830068c9e6a001b59878dd0059050/work" }, "Name": "overlay2" }, "RootFS": { "Type": "layers", "Layers": [ "sha256:831c5620387fb9efec59fc82a42b948546c6be601e3ab34a87108ecf852aa15f", "sha256:5fb987d2e54d85820d95d6c31f3fe4cd95bf71fe6d9d9e4684082cb551b728b0", "sha256:4fc1aa8003a3d0d2481f10d17773869cbff12c1008df30e0bab8259086a0311c" ] }, "Metadata": { "LastTagTime": "0001-01-01T00:00:00Z" } } ]
Image Tagging and Pushing to Docker Hub
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Tagging
docker image tag- assign one or more tags to image
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PS E:\> docker image tag --help Usage: docker image tag SOURCE_IMAGE[:TAG] TARGET_IMAGE[:TAG] Create a tag TARGET_IMAGE that refers to SOURCE_IMAGE -
<user>/<repo>:<tag>-
default tag is latest if not specified
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docker image lsPS E:\> docker image ls REPOSITORY TAG IMAGE ID CREATED SIZE alpine latest c85b8f829d1f 7 days ago 5.59MB ubuntu 14.04 6e4f1fe62ff1 8 days ago 197MB nginx 1.17.6 231d40e811cd 4 weeks ago 126MB nginx latest 231d40e811cd 4 weeks ago 126MB nginx alpine a624d888d69f 5 weeks ago 21.5MB centos 7 5e35e350aded 6 weeks ago 203MB centos latest 0f3e07c0138f 2 months ago 220MB tim23656/cheers2019 latest 21660382562c 3 months ago 4.01MB <none> <none> cbaa020e0b1c 3 months ago 356MB golang 1.11-alpine e116d2efa2ab 4 months ago 312MB vulnerables/web-dvwa latest ab0d83586b6e 14 months ago 712MB elasticsearch 2 5e9d896dc62c 15 months ago 479MB
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EX: 拿 nginx 的 image 變成自己的 repo
docker image tag SOURCE_IMAGE[:TAG] TARGET_IMAGE[:TAG]- TARGET_IMAGE: 命名規則
<user>/<repo> -
PS E:\> docker image tag nginx yuting/nginx PS E:\> docker image ls REPOSITORY TAG IMAGE ID CREATED SIZE alpine latest c85b8f829d1f 7 days ago 5.59MB ubuntu 14.04 6e4f1fe62ff1 8 days ago 197MB nginx 1.17.6 231d40e811cd 4 weeks ago 126MB nginx latest 231d40e811cd 4 weeks ago 126MB nginx mainline 231d40e811cd 4 weeks ago 126MB yuting/nginx latest 231d40e811cd 4 weeks ago 126MB nginx alpine a624d888d69f 5 weeks ago 21.5MB centos 7 5e35e350aded 6 weeks ago 203MB centos latest 0f3e07c0138f 2 months ago 220MB tim23656/cheers2019 latest 21660382562c 3 months ago 4.01MB <none> <none> cbaa020e0b1c 3 months ago 356MB golang 1.11-alpine e116d2efa2ab 4 months ago 312MB vulnerables/web-dvwa latest ab0d83586b6e 14 months ago 712MB elasticsearch 2 5e9d896dc62c 15 months ago 479MB
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docker image push
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uploads changed layers to a image registry (default is Hub)
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using
docker login&docker logoutdocker login docker.iodocker login -u "username" -p "password" docker.io
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然後我搞了半天！！ 一直失敗，深深覺得老師欺騙我的感情的那塊崩潰的時刻，突然看到
yuting/nginx….
然後再看命名規則:<user>/<repo>，靠杯喔！！！！！！！！！
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完美 push
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PS E:\> docker image tag nginx tim23656/nginx PS E:\> docker image ls REPOSITORY TAG IMAGE ID CREATED SIZE alpine latest c85b8f829d1f 7 days ago 5.59MB ubuntu 14.04 6e4f1fe62ff1 8 days ago 197MB nginx 1.17.6 231d40e811cd 4 weeks ago 126MB nginx latest 231d40e811cd 4 weeks ago 126MB nginx mainline 231d40e811cd 4 weeks ago 126MB tim23656/nginx latest 231d40e811cd 4 weeks ago 126MB yuting/nginx latest 231d40e811cd 4 weeks ago 126MB nginx alpine a624d888d69f 5 weeks ago 21.5MB centos 7 5e35e350aded 6 weeks ago 203MB centos latest 0f3e07c0138f 2 months ago 220MB tim23656/cheers2019 latest 21660382562c 3 months ago 4.01MB <none> <none> cbaa020e0b1c 3 months ago 356MB golang 1.11-alpine e116d2efa2ab 4 months ago 312MB vulnerables/web-dvwa latest ab0d83586b6e 14 months ago 712MB elasticsearch 2 5e9d896dc62c 15 months ago 479MB PS E:\> docker image push tim23656/nginx The push refers to repository [docker.io/tim23656/nginx] 4fc1aa8003a3: Pushed 5fb987d2e54d: Pushed 831c5620387f: Pushed latest: digest: sha256:189cce606b29fb2a33ebc2fcecfa8e33b0b99740da4737133cdbcee92f3aba0a size: 948
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EX: 幫剛剛的 create image 加上 tag
PS E:\> docker image tag tim23656/nginx tim23656/nginx:testing
PS E:\> docker image ls
REPOSITORY TAG IMAGE ID CREATED SIZE
alpine latest c85b8f829d1f 7 days ago 5.59MB
ubuntu 14.04 6e4f1fe62ff1 8 days ago 197MB
tim23656/nginx latest 231d40e811cd 4 weeks ago 126MB
tim23656/nginx testing 231d40e811cd 4 weeks ago 126MB
yuting/nginx latest 231d40e811cd 4 weeks ago 126MB
nginx 1.17.6 231d40e811cd 4 weeks ago 126MB
nginx latest 231d40e811cd 4 weeks ago 126MB
nginx mainline 231d40e811cd 4 weeks ago 126MB
nginx alpine a624d888d69f 5 weeks ago 21.5MB
centos 7 5e35e350aded 6 weeks ago 203MB
centos latest 0f3e07c0138f 2 months ago 220MB
tim23656/cheers2019 latest 21660382562c 3 months ago 4.01MB
<none> <none> cbaa020e0b1c 3 months ago 356MB
golang 1.11-alpine e116d2efa2ab 4 months ago 312MB
vulnerables/web-dvwa latest ab0d83586b6e 14 months ago 712MB
elasticsearch 2 5e9d896dc62c 15 months ago 479MB
PS E:\> docker image push tim23656/nginx:testing
The push refers to repository [docker.io/tim23656/nginx]
4fc1aa8003a3: Layer already exists 5fb987d2e54d: Layer already exists 831c5620387f: Layer already exists testing: digest: sha256:189cce606b29fb2a33ebc2fcecfa8e33b0b99740da4737133cdbcee92f3aba0a size: 948
Review
- Properly tagging images
- Tagging images for upload to Docker Hub
- How tagging is related to image ID
- The Latest Tag
- Logging into Docker Hub from docker cli
- How to create private Docker Hub images
- 先在 docker hub 建立 private repo 再 push