$ docker login docker.mycompany.net Authenticating with existing credentials... WARNING! Your password will be stored unencrypted in /home/krach/.docker/config.json. Configure a credential helper to remove this warning. See https://docs.docker.com/engine/reference/commandline/login/#credentials-store Login Succeeded $If you check your configuration file, you can simply read the password:
$ cat .docker/config.json
{
"auths": {
"docker.mycompany.net": {
"auth": "VGhpc0lzTXlTZWNyZXRQYXNzd29yZAo="
}
}
}
$ echo VGhpc0lzTXlTZWNyZXRQYXNzd29yZAo= | base64 -d
krach:ThisIsMySecretPassword
$
GnuPG and pass according this guide.
$ sudo apt install golang-docker-credential-helpers
Reading package lists... Done
Building dependency tree... Done
Reading state information... Done
The following NEW packages will be installed:
golang-docker-credential-helpers
0 upgraded, 1 newly installed, 0 to remove and 1 not upgraded.
[...]
$ docker-credential-pass list
{}
$
.docker/config.json:
{
"credsStore":"pass"
}
Then login to docker:
$ docker login docker.mycompany.net
Username: krach
Password:
Login Succeeded
$
$
$ pass list
Password Store
└── docker-credential-helpers
├── ZG9ja2VyLm15Y29tcGFueS5uZXQK
│ └── krach
$
$
$ docker-credential-pass list
{"docker.mycompany.net":"krach"}
$
$ docker ps -a CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES 4ea1fd16c747 axos-test:test1 "/bin/bash" 16 hours ago Exited (2) 6 minutes ago amazing_mclean 96713c6b63cf axos-test:test1 "/bin/bash" 16 hours ago Exited (130) 16 hours ago hungry_chaum 39e762ac4954 debian:stretch "/bin/bash" 16 hours ago Exited (0) 16 hours ago axos-test 5a5ee60e15fa debian:stretch "/bin/bash" 16 hours ago Exited (0) 2 seconds ago admiring_snyder c255b556f3d3 debian:stretch "/bin/bash" 16 hours ago Exited (0) 2 seconds ago happy_pike $ $ docker container rm c255b556f3d3 5a5ee60e15fa 96713c6b63cf c255b556f3d3 5a5ee60e15fa 96713c6b63cf kkr@host137:~$ docker ps -a CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES 4ea1fd16c747 axos-test:test1 "/bin/bash" 16 hours ago Exited (2) 7 minutes ago amazing_mclean 39e762ac4954 debian:stretch "/bin/bash" 16 hours ago Exited (0) 16 hours ago axos-test $When a container is running by accident, you can stop it by
docker stop [CONTAINER ID].
To remove all (unused) images - images without running container - type in:
$ docker image prune -a -f Deleted Images: [...] deleted: sha256:8f81bb0664a1cb46d3e10fac077537a901f65288c7ce878182162465f64e59d8 deleted: sha256:06c7a857c13a25adc77b72794d3f32f3b2755292faf569096673a70d9fa91b7e deleted: sha256:95129a5fe07e89c1898dc40a027b291d5fe33a67b35a88f0f0eaf51ea691f0b5 Total reclaimed space: 43.09GB $
To remove images explicitly type in:
$ docker images REPOSITORY TAG IMAGE ID CREATED SIZE axos-test test2 2ce200c69dcf 7 minutes ago 1.27GB axos-test test1 c98cd4a31a03 16 hours ago 218MB axos-test latest 8c7d9cf203ed 16 hours ago 218MB debian stretch 5a6d49d5e833 2 weeks ago 101MB ubuntu latest 47b19964fb50 5 months ago 88.1MB hello-world latest fce289e99eb9 6 months ago 1.84kB $ $ docker image rm 5a6d49d5e833 8c7d9cf203ed Untagged: axos-test:latest Deleted: sha256:8c7d9cf203edefb79fc2784e12c6e2c8beb3597142da184e6ae9014607299e8c Error response from daemon: conflict: unable to delete 5a6d49d5e833 (cannot be forced) - image has dependent child images $Volumes occupy disk space as well:
$ docker volume ls DRIVER VOLUME NAME local misc_persistence_across_containers local mrt.base.fsw-ccache local mrt.base.fsw-home-cache local vscode $ docker volume prune WARNING! This will remove anonymous local volumes not used by at least one container. Are you sure you want to continue? [y/N] y Total reclaimed space: 0B $ docker volume rm misc_persistence_across_containers mrt.base.fsw-ccache mrt.base.fsw-home-cache vscode misc_persistence_across_containers mrt.base.fsw-ccache mrt.base.fsw-home-cache vscode $ docker volume ls DRIVER VOLUME NAME $
$ docker pull debian:stretch stretch: Pulling from library/debian a4d8138d0f6b: Pull complete Digest: sha256:397b2157a9ea8d7f16c613aded70284292106e8b813fb1ed5de8a8785310a26a Status: Downloaded newer image for debian:stretch docker.io/library/debian:stretch $ $ docker run --name axos-test -it debian:stretch /bin/bash root@8cf2b0299b0f:/# ls bin dev home lib64 mnt proc run srv tmp var boot etc lib media opt root sbin sys usr root@8cf2b0299b0f:/# exit $ $ docker start axos-test $ docker attach axos-test root@8cf2b0299b0f:/#The launch can be parameterized with the following flags:
--rm: Remove docker image after executing the container--user: Execute with same User ID as current user (especially interesting when modifying mounted data)--mount: Mount directories - e.g. for SSH access by git# # Now the compilation can be started with # $ docker run -it --rm --user $(id -u):$(id -g) --mount type=bind,src=$(pwd)/..,target=/docker/doos --mount type=bind,src=$HOME/.ssh,target=/home/test/.ssh,readonly doos/build:1.3.3 /usr/bin/make -C /docker/doos # or # $ docker run -it --rm --user $(id -u):$(id -g) -v $(pwd)/..:/docker/doos -v $HOME/.ssh:/home/test/.ssh:ro doos/build:1.3.3 /usr/bin/make -C /docker/doos #
docker cp we can copy any file into a running docker container:
$ docker container ls CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES c9841492ea83 yocto:1.1 "/bin/bash" 24 minutes ago Up 24 minutes mystifying_wilson $ docker cp myfile c9841492ea83:/home/root/ $
# Dockerfile to create build-environment image # # To be executed with 'docker build --tag doos/build:1.3.3 .' # # Errata: # * does not work with host user-ID other than 1000 (check with `id -u`) # FROM debian:jessie RUN dpkg --add-architecture i386 RUN apt-get --yes update RUN apt-get --yes install apt-utils RUN apt-get --yes upgrade RUN apt-get --yes install git make g++ cmake bison flex gettext texinfo bzip2 wget cpio python unzip whois lib32z1 openssh-server libncurses5-dev lua5.1 curl libstdc++6:i386 libgcc1:i386 zlib1g:i386 libncurses5:i386 bc u-boot-tools kmod subversion vim-tiny RUN apt-get --yes clean RUN adduser --disabled-password --gecos '' worker RUN echo "test:test" | chpasswd RUN /etc/init.d/ssh start
$ docker ps -a CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES 39e762ac4954 debian:stretch "/bin/bash" 2 minutes ago Exited (0) 3 seconds ago axos-test 8cf2b0299b0f debian:stretch "/bin/bash" 21 minutes ago Exited (0) 2 minutes ago happy_proskuriakova 5a5ee60e15fa debian:stretch "/bin/bash" 23 minutes ago Up 23 minutes admiring_snyder c255b556f3d3 debian:stretch "/bin/bash" 24 minutes ago Up 24 minutes happy_pike a99f5345f004 debian:stretch "bash" 25 minutes ago Exited (0) 25 minutes ago trusting_fermat $ $ docker commit 39e762ac4954 axos-test:test1 $ $ docker images REPOSITORY TAG IMAGE ID CREATED SIZE axos-test test1 c98cd4a31a03 6 seconds ago 218MB axos-test latest 8c7d9cf203ed 20 seconds ago 218MB debian stretch 5a6d49d5e833 2 weeks ago 101MB $ $ docker run -it axos-test:test1 /bin/bash $