Docker新手，这个图片创build成功了吗？

运行docker build . 输出：

 Sending build context to Docker daemon 2.048 kB Step 1 : FROM ubuntu:14.04.3 14.04.3: Pulling from library/ubuntu 8387d9ff0016: Pull complete 3b52deaaf0ed: Pull complete 4bd501fad6de: Pull complete a3ed95caeb02: Pull complete Digest: sha256:2febbcede4f3eb82ae0dc44518a2e2a7b06a0452685e64e6b13f51b278294780 Status: Downloaded newer image for ubuntu:14.04.3 ---> 3876b81b5a81 Step 2 : RUN sudo apt-get install git ---> Running in cda85e00be34 Reading package lists... Building dependency tree... Reading state information... The following extra packages will be installed: ca-certificates git-man krb5-locales libasn1-8-heimdal libcurl3-gnutls libedit2 liberror-perl libgssapi-krb5-2 libgssapi3-heimdal libhcrypto4-heimdal libheimbase1-heimdal libheimntlm0-heimdal libhx509-5-heimdal libidn11 libk5crypto3 libkeyutils1 libkrb5-26-heimdal libkrb5-3 libkrb5support0 libldap-2.4-2 libroken18-heimdal librtmp0 libsasl2-2 libsasl2-modules libsasl2-modules-db libwind0-heimdal libx11-6 libx11-data libxau6 libxcb1 libxdmcp6 libxext6 libxmuu1 openssh-client openssl patch rsync xauth Suggested packages: gettext-base git-daemon-run git-daemon-sysvinit git-doc git-el git-email git-gui gitk gitweb git-arch git-bzr git-cvs git-mediawiki git-svn krb5-doc krb5-user libsasl2-modules-otp libsasl2-modules-ldap libsasl2-modules-sql libsasl2-modules-gssapi-mit libsasl2-modules-gssapi-heimdal ssh-askpass libpam-ssh keychain monkeysphere ed diffutils-doc openssh-server Recommended packages: ssh-client The following NEW packages will be installed: ca-certificates git git-man krb5-locales libasn1-8-heimdal libcurl3-gnutls libedit2 liberror-perl libgssapi-krb5-2 libgssapi3-heimdal libhcrypto4-heimdal libheimbase1-heimdal libheimntlm0-heimdal libhx509-5-heimdal libidn11 libk5crypto3 libkeyutils1 libkrb5-26-heimdal libkrb5-3 libkrb5support0 libldap-2.4-2 libroken18-heimdal librtmp0 libsasl2-2 libsasl2-modules libsasl2-modules-db libwind0-heimdal libx11-6 libx11-data libxau6 libxcb1 libxdmcp6 libxext6 libxmuu1 openssh-client openssl patch rsync xauth 0 upgraded, 39 newly installed, 0 to remove and 0 not upgraded. Need to get 7671 kB of archives. After this operation, 41.2 MB of additional disk space will be used. Do you want to continue? [Y/n] Abort. The command '/bin/sh -c sudo apt-get install git' returned a non-zero code: 1 ssh user@ .com MACLA910275:~ user$ ssh user@ .com Unauthorized access to or use of this system is prohibited. All access and use may be monitored and recorded. user@ .com's password: Welcome to Ubuntu 14.04.3 LTS (GNU/Linux 3.19.0-39-generic x86_64) Unauthorized access to or use of this system is prohibited. All access and use may be monitored and recorded. Unauthorized access to or use of this system is prohibited. All access and use may be monitored and recorded. user@ :~$ ls user@ :~$ pwd /home/user user@ :~$ sudo apt-get install git Reading package lists... Done Building dependency tree Reading state information... Done git is already the newest version. 0 upgraded, 0 newly installed, 0 to remove and 66 not upgraded. user@ :~$ docker Usage: docker [OPTIONS] COMMAND [arg...] docker daemon [ --help | ... ] docker [ --help | -v | --version ] A self-sufficient runtime for containers. Options: --config=~/.docker Location of client config files -D, --debug Enable debug mode -H, --host=[] Daemon socket(s) to connect to -h, --help Print usage -l, --log-level=info Set the logging level --tls Use TLS; implied by --tlsverify --tlscacert=~/.docker/ca.pem Trust certs signed only by this CA --tlscert=~/.docker/cert.pem Path to TLS certificate file --tlskey=~/.docker/key.pem Path to TLS key file --tlsverify Use TLS and verify the remote -v, --version Print version information and quit Commands: attach Attach to a running container build Build an image from a Dockerfile commit Create a new image from a container's changes cp Copy files/folders between a container and the local filesystem create Create a new container diff Inspect changes on a container's filesystem events Get real time events from the server exec Run a command in a running container export Export a container's filesystem as a tar archive history Show the history of an image images List images import Import the contents from a tarball to create a filesystem image info Display system-wide information inspect Return low-level information on a container or image kill Kill a running container load Load an image from a tar archive or STDIN login Log in to a Docker registry logout Log out from a Docker registry logs Fetch the logs of a container network Manage Docker networks pause Pause all processes within a container port List port mappings or a specific mapping for the CONTAINER ps List containers pull Pull an image or a repository from a registry push Push an image or a repository to a registry rename Rename a container restart Restart a container rm Remove one or more containers rmi Remove one or more images run Run a command in a new container save Save one or more images to a tar archive search Search the Docker Hub for images start Start one or more stopped containers stats Display a live stream of container(s) resource usage statistics stop Stop a running container tag Tag an image into a repository top Display the running processes of a container unpause Unpause all processes within a container update Update configuration of one or more containers version Show the Docker version information volume Manage Docker volumes wait Block until a container stops, then print its exit code Run 'docker COMMAND --help' for more information on a command. user@ :~$ sudo apt-get install g Reading package lists... Done Building dependency tree Reading state information... Done E: Unable to locate package g user@ :~$ user@ :~$ user@ :~$ user@ :~$ user@ :~$ user@ :~$ docker images Cannot connect to the Docker daemon. Is the docker daemon running on this host? user@ :~$ docker version Client: Version: 1.11.2 API version: 1.23 Go version: go1.5.4 Git commit: b9f10c9 Built: Wed Jun 1 21:47:50 2016 OS/Arch: linux/amd64 Cannot connect to the Docker daemon. Is the docker daemon running on this host? user@ :~$ sudo -i root@ :~# docker images REPOSITORY TAG IMAGE ID CREATED SIZE hello-world latest 693bce725149 3 weeks ago 967 B root@ :~# \ > root@ :~# root@ :~# root@ :~# root@ :~# root@ :~# root@ :~# DOCKER PS -a DOCKER: command not found root@ :~# docker ps -1 flag provided but not defined: -1 See 'docker ps --help'. root@ :~# docker ps -a CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES 4e22edd9df8a hello-world "/hello" 2 days ago Exited (0) 2 days ago big_boyd root@ :~# lsb_release -a No LSB modules are available. Distributor ID: Ubuntu Description: Ubuntu 14.04.3 LTS Release: 14.04 Codename: trusty root@ :~# pwd /root root@ :~# mkdir docker-myproject root@ :~# cd docker-myproject/ root@ :~/docker-myproject# ls root@ :~/docker-myproject# vi Dockerfile root@ :~/docker-myproject# vi Dockerfile root@ :~/docker-myproject# vi Dockerfile root@ :~/docker-myproject# vi Dockerfile root@ :~/docker-myproject# vi Dockerfile root@ :~/docker-myproject# vi Dockerfile root@ :~/docker-myproject# root@ :~/docker-myproject# root@ :~/docker-myproject# docker build . Sending build context to Docker daemon 2.048 kB Step 1 : FROM ubuntu 14.04.3 Error parsing reference: "ubuntu 14.04.3" is not a valid repository/tag root@ :~/docker-myproject# vi Dockerfile root@ :~/docker-myproject# root@ :~/docker-myproject# root@ :~/docker-myproject# docker build . Sending build context to Docker daemon 2.048 kB Step 1 : FROM ubuntu:14.04.3 14.04.3: Pulling from library/ubuntu 8387d9ff0016: Pull complete 3b52deaaf0ed: Pull complete 4bd501fad6de: Pull complete a3ed95caeb02: Pull complete Digest: sha256:2febbcede4f3eb82ae0dc44518a2e2a7b06a0452685e64e6b13f51b278294780 Status: Downloaded newer image for ubuntu:14.04.3 ---> 3876b81b5a81 Step 2 : RUN sudo apt-get install git ---> Running in cda85e00be34 Reading package lists... Building dependency tree... Reading state information... The following extra packages will be installed: ca-certificates git-man krb5-locales libasn1-8-heimdal libcurl3-gnutls libedit2 liberror-perl libgssapi-krb5-2 libgssapi3-heimdal libhcrypto4-heimdal libheimbase1-heimdal libheimntlm0-heimdal libhx509-5-heimdal libidn11 libk5crypto3 libkeyutils1 libkrb5-26-heimdal libkrb5-3 libkrb5support0 libldap-2.4-2 libroken18-heimdal librtmp0 libsasl2-2 libsasl2-modules libsasl2-modules-db libwind0-heimdal libx11-6 libx11-data libxau6 libxcb1 libxdmcp6 libxext6 libxmuu1 openssh-client openssl patch rsync xauth Suggested packages: gettext-base git-daemon-run git-daemon-sysvinit git-doc git-el git-email git-gui gitk gitweb git-arch git-bzr git-cvs git-mediawiki git-svn krb5-doc krb5-user libsasl2-modules-otp libsasl2-modules-ldap libsasl2-modules-sql libsasl2-modules-gssapi-mit libsasl2-modules-gssapi-heimdal ssh-askpass libpam-ssh keychain monkeysphere ed diffutils-doc openssh-server Recommended packages: ssh-client The following NEW packages will be installed: ca-certificates git git-man krb5-locales libasn1-8-heimdal libcurl3-gnutls libedit2 liberror-perl libgssapi-krb5-2 libgssapi3-heimdal libhcrypto4-heimdal libheimbase1-heimdal libheimntlm0-heimdal libhx509-5-heimdal libidn11 libk5crypto3 libkeyutils1 libkrb5-26-heimdal libkrb5-3 libkrb5support0 libldap-2.4-2 libroken18-heimdal librtmp0 libsasl2-2 libsasl2-modules libsasl2-modules-db libwind0-heimdal libx11-6 libx11-data libxau6 libxcb1 libxdmcp6 libxext6 libxmuu1 openssh-client openssl patch rsync xauth 0 upgraded, 39 newly installed, 0 to remove and 0 not upgraded. Need to get 7671 kB of archives. After this operation, 41.2 MB of additional disk space will be used. Do you want to continue? [Y/n] Abort. The command '/bin/sh -c sudo apt-get install git' returned a non-zero code: 1 root@ :~/docker-myproject# docker build . Sending build context to Docker daemon 2.048 kB Step 1 : FROM ubuntu:14.04.3 ---> 3876b81b5a81 Step 2 : RUN sudo apt-get install git ---> Running in 1de93513f856 Reading package lists... Building dependency tree... Reading state information... The following extra packages will be installed: ca-certificates git-man krb5-locales libasn1-8-heimdal libcurl3-gnutls libedit2 liberror-perl libgssapi-krb5-2 libgssapi3-heimdal libhcrypto4-heimdal libheimbase1-heimdal libheimntlm0-heimdal libhx509-5-heimdal libidn11 libk5crypto3 libkeyutils1 libkrb5-26-heimdal libkrb5-3 libkrb5support0 libldap-2.4-2 libroken18-heimdal librtmp0 libsasl2-2 libsasl2-modules libsasl2-modules-db libwind0-heimdal libx11-6 libx11-data libxau6 libxcb1 libxdmcp6 libxext6 libxmuu1 openssh-client openssl patch rsync xauth Suggested packages: gettext-base git-daemon-run git-daemon-sysvinit git-doc git-el git-email git-gui gitk gitweb git-arch git-bzr git-cvs git-mediawiki git-svn krb5-doc krb5-user libsasl2-modules-otp libsasl2-modules-ldap libsasl2-modules-sql libsasl2-modules-gssapi-mit libsasl2-modules-gssapi-heimdal ssh-askpass libpam-ssh keychain monkeysphere ed diffutils-doc openssh-server Recommended packages: ssh-client The following NEW packages will be installed: ca-certificates git git-man krb5-locales libasn1-8-heimdal libcurl3-gnutls libedit2 liberror-perl libgssapi-krb5-2 libgssapi3-heimdal libhcrypto4-heimdal libheimbase1-heimdal libheimntlm0-heimdal libhx509-5-heimdal libidn11 libk5crypto3 libkeyutils1 libkrb5-26-heimdal libkrb5-3 libkrb5support0 libldap-2.4-2 libroken18-heimdal librtmp0 libsasl2-2 libsasl2-modules libsasl2-modules-db libwind0-heimdal libx11-6 libx11-data libxau6 libxcb1 libxdmcp6 libxext6 libxmuu1 openssh-client openssl patch rsync xauth 0 upgraded, 39 newly installed, 0 to remove and 0 not upgraded. Need to get 7671 kB of archives. After this operation, 41.2 MB of additional disk space will be used. Do you want to continue? [Y/n] Abort. The command '/bin/sh -c sudo apt-get install git' returned a non-zero code: 1 root@ :~/docker-myproject# git usage: git [--version] [--help] [-C <path>] [-c name=value] [--exec-path[=<path>]] [--html-path] [--man-path] [--info-path] [-p|--paginate|--no-pager] [--no-replace-objects] [--bare] [--git-dir=<path>] [--work-tree=<path>] [--namespace=<name>] <command> [<args>] The most commonly used git commands are: add Add file contents to the index bisect Find by binary search the change that introduced a bug branch List, create, or delete branches checkout Checkout a branch or paths to the working tree clone Clone a repository into a new directory commit Record changes to the repository diff Show changes between commits, commit and working tree, etc fetch Download objects and refs from another repository grep Print lines matching a pattern init Create an empty Git repository or reinitialize an existing one log Show commit logs merge Join two or more development histories together mv Move or rename a file, a directory, or a symlink pull Fetch from and integrate with another repository or a local branch push Update remote refs along with associated objects rebase Forward-port local commits to the updated upstream head reset Reset current HEAD to the specified state rm Remove files from the working tree and from the index show Show various types of objects status Show the working tree status tag Create, list, delete or verify a tag object signed with GPG 'git help -a' and 'git help -g' lists available subcommands and some concept guides. See 'git help <command>' or 'git help <concept>' to read about a specific subcommand or concept. root@ :~/docker-myproject# ls Dockerfile root@ :~/docker-myproject# vi Dockerfile 

这是我的Dockerfile：

 FROM ubuntu:14.04.3 RUN sudo apt-get install git 

docker图像返回：

 ubuntu 14.04.3 3876b81b5a81 5 months ago 187.9 MB 

这个图像是新创build的，但是如果这不是指示创build今天？

因为已经安装的git是导致这个错误？ ：

 After this operation, 41.2 MB of additional disk space will be used. Do you want to continue? [Y/n] Abort. The command '/bin/sh -c sudo apt-get install git' returned a non-zero code: 1 

Answer 1

1. 默认情况下，如果APT即将安装一堆总大小超过某个值的软件包，它会在安装之前要求您确认。 然而，构buildDocker镜像时运行的命令都是非交互式的，所以apt-get install git将无法得到其问题的答案，因此它将不做任何事情而退出。 你需要在你的Dockerfile中使用apt-get install -y git来自动地对提示说“yes”。 （请注意， sudo在这里是多余的，因为命令已经以root身份运行。）

2. 由于Dockerfile在第一条指令上失败，docker docker build实际上并没有创build一个新的镜像。 docker images的输出显示你只有一个图像， ubuntu:14.04.3 ，这是五个月前创build的图像。

3. Git还没有“已经安装”，因为它不在正式的ubuntu Docker镜像中。 Git是否安装在您的主机系统上与它是否安装在您的Docker镜像中完全没有关系。

Answer 2

用apt-get install git -y重试git install（如果需要，使用sudo ）。 这应该工作。