はじめに
この記事はコンテナ勉強用として試したことまとめたものです。
(ほぼ自分が使用するもの...随時追加予定)
Dockerコマンド
- イメージのダウンロードコマンド
docker image pull [オプション] イメージ名 [:タグ名]
# docker image pull centos:7
7: Pulling from library/centos
8ba884070f61: Pull complete
Digest: sha256:a799dd8a2ded4a83484bbae769d97655392b3f86533ceb7dd96bbac929809f3c
Status: Downloaded newer image for centos:7
docker.io/library/centos:7
#
- イメージの一覧表示コマンド
docker image ls [オプション] [リポジトリ名]
# docker image ls
REPOSITORY TAG IMAGE ID CREATED SIZE
nginx latest 5a3221f0137b 41 hours ago 126MB
centos 7 9f38484d220f 5 months ago 202MB
hello-world latest fce289e99eb9 7 months ago 1.84kB
#
- イメージの詳細情報
docker image inspect [イメージ名]
# docker image inspect centos:7
[
{
"Id": "sha256:9f38484d220fa527b1fb19747638497179500a1bed8bf0498eb788229229e6e1",
"RepoTags": [
"centos:7"
],
"RepoDigests": [
"centos@sha256:a799dd8a2ded4a83484bbae769d97655392b3f86533ceb7dd96bbac929809f3c"
],
"Parent": "",
"Comment": "",
"Created": "2019-03-14T21:19:53.361167852Z",
"Container": "958baf5225f586da9c70a21e911a0a875402dd22d83133d78b3b3aa6130e7892",
"ContainerConfig": {
"Hostname": "958baf5225f5",
"Domainname": "",
"User": "",
"AttachStdin": false,
"AttachStdout": false,
"AttachStderr": false,
"Tty": false,
"OpenStdin": false,
"StdinOnce": false,
"Env": [
"PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin"
],
"Cmd": [
"/bin/sh",
"-c",
"#(nop) ",
"CMD [\"/bin/bash\"]"
],
"ArgsEscaped": true,
"Image": "sha256:294e8d8145287e70f07328cc09d840fad8980b801223321b983442f097aff0d8",
"Volumes": null,
"WorkingDir": "",
"Entrypoint": null,
"OnBuild": null,
"Labels": {
"org.label-schema.build-date": "20190305",
"org.label-schema.license": "GPLv2",
"org.label-schema.name": "CentOS Base Image",
"org.label-schema.schema-version": "1.0",
"org.label-schema.vendor": "CentOS"
}
},
"DockerVersion": "18.06.1-ce",
"Author": "",
"Config": {
"Hostname": "",
"Domainname": "",
"User": "",
"AttachStdin": false,
"AttachStdout": false,
"AttachStderr": false,
"Tty": false,
"OpenStdin": false,
"StdinOnce": false,
"Env": [
"PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin"
],
"Cmd": [
"/bin/bash"
],
"ArgsEscaped": true,
"Image": "sha256:294e8d8145287e70f07328cc09d840fad8980b801223321b983442f097aff0d8",
"Volumes": null,
"WorkingDir": "",
"Entrypoint": null,
"OnBuild": null,
"Labels": {
"org.label-schema.build-date": "20190305",
"org.label-schema.license": "GPLv2",
"org.label-schema.name": "CentOS Base Image",
"org.label-schema.schema-version": "1.0",
"org.label-schema.vendor": "CentOS"
}
},
"Architecture": "amd64",
"Os": "linux",
"Size": 201775492,
"VirtualSize": 201775492,
"GraphDriver": {
"Data": {
"DeviceId": "10",
"DeviceName": "docker-253:0-50575843-a8cd5245187bae41a0457a7100bac56e3468e9a74d4eeab24091a5b772a899ae",
"DeviceSize": "10737418240"
},
"Name": "devicemapper"
},
"RootFS": {
"Type": "layers",
"Layers": [
"sha256:d69483a6face4499acb974449d1303591fcbb5cdce5420f36f8a6607bda11854"
]
},
"Metadata": {
"LastTagTime": "0001-01-01T00:00:00Z"
}
}
]
#
- Dockerfileからイメージを作成
docker build -t [作成するイメージ名]:[タグ名] [Dockerfileの場所]
# docker build -t test-docker:latest ./
Sending build context to Docker daemon 3.584kB
Step 1/4 : FROM centos:centos7
---> 67fa590cfc1c
Step 2/4 : RUN ["yum", "-y", "install", "httpd"]
---> Using cache
---> 37f12e15f83e
Step 3/4 : COPY index.html /var/www/html
---> Using cache
---> fbafd7674218
Step 4/4 : CMD ["/usr/sbin/httpd", "-D", "FOREGROUND"]
---> Using cache
---> d59edf5b5938
Successfully built d59edf5b5938
Successfully tagged test-docker:latest
#
- Dockerコンテナ起動
docker run [オプション] [イメージ名:タグ名] [引数]
# docker run -it test-ubuntu-docker
root@0e0479ff474v:/#
- イメージの削除
docker rmi [オプション] [イメージID]
# docker rmi -f golang
Untagged: golang:latest
Untagged: golang@sha256:1b1246987ecb4939d9bd20f74eab25e8e2ad819aceea2d6b59869c82f85ef1de
Deleted: sha256:52b59e9ead8e18fafb497532ed44ee8ee4833082b9874abbf0bca61a713a4e01
Deleted: sha256:037466601c73650bce9e801284525d2cb01076d83152e3f52b58a4f1db93cd92
Deleted: sha256:bfe10948239b9bb3c686f973f558bf3b13e5a4e5836a6e2ca10160ce3cec52f0
Deleted: sha256:1daff011bfed534d3a97f224a10f0345bb856f3ee68c885515f0840875ff1502
Deleted: sha256:aeed80cc2bd89729d4743c112894e46bf3e454e23035fca42d8c2317d76e6b59
Deleted: sha256:4d46c2665dc95257b2142eff58b4ca0e01c39238ce5722c573b351a86f6db59d
Deleted: sha256:5bfb8954c951a40ba691ad40d8c6403564ab3ec406bb33693c15a145a4e6cede
Deleted: sha256:78c1b9419976227e05be9d243b7fa583bea44a5258e52018b2af4cdfe23d148d
#