docker with proxy

docker pull

$ sudo mkdir -p /etc/systemd/system/docker.service.d
$ cat /etc/systemd/system/docker.service.d/http-proxy.conf
[Service]
Environment="HTTPS_PROXY=http://sample.proxy.com:80"
Environment="HTTP_PROXY=http://sample.proxy.com:80"
Environment="ALL_PROXY=http://sample.proxy.com:80"
systemctl daemon-reload;systemctl start docker

$ sudo systemctl daemon-reload
$ sudo systemctl restart docker

# verify
$ systemctl show docker --property Environment
Environment=HTTPS_PROXY=http://sample.proxy.com:80 HTTP_PROXY=http://sample.proxy.com:80 ALL_PROXY=http://sample.proxy.com:80

  • for socks5

    $ [ ! -d /etc/systemd/system/docker.service.d ] && sudo mkdir -p /etc/systemd/system/docker.service.d
$ sudo bash -c "cat > /etc/systemd/system/docker.service.d/socks5-proxy.conf" << EOF
[Service]
Environment="ALL_PROXY=socks5://sample.proxy.com:80"
Environment="NO_PROXY=localhost,127.0.0.1,130.147.0.0/16,130.145.0.0/16"
EOF

$ sudo systemctl daemon-reload
$ sudo systemctl enable docker.service
$ sudo systemctl restart docker.service

  • or

    # for rootless mode
$ mkdir -p ~/.config/systemd/user/docker.service.d/
# or regular mode
$ sudo mkdir -p /etc/systemd/system/docker.service.d

$ sudo bash -c "cat > /etc/systemd/system/docker.service.d" << EOF
[Service]
Environment="HTTP_PROXY=http://sample.proxy.com:80"
Environment="HTTPS_PROXY=https://sample.proxy.com:443"
Environment="NO_PROXY=localhost,127.0.0.1,sample.docker-registry.com,.corp"
EOF

$ sudo systemctl daemon-reload
$ sudo systemctl restart docker

# verify
$ systemctl show docker --property Environment
Environment=HTTP_PROXY=http://sample.proxy.com:80 HTTPS_PROXY=http://sample.proxy.com:443 NO_PROXY=localhost,127.0.0.1,sample.docker-registry.com,.corp

docker build

$ mkdir -p ~/.docker
$ cat > ~/.docker/config.json << EFO
{
 "proxies":
 {
   "default":
   {
     "httpProxy": "http://sample.proxy.com:80",
     "httpsProxy": "http://sample.proxy.com:80",
     "allProxy": "http://sample.proxy.com:80",
     "noProxy": "*.sample.domain1.com,.domain2.com,127.0.0.0/8"
   }
 }
}
EOF

  • or via --build-arg:

    $ docker build \
         --build-arg http_proxy=http://sample.proxy.com:80 \
         --build-arg https_proxy=http://sample.proxy.com:443 \
        .

  • details

    | VARIABLE | DOCKERFILE EXAMPLE | DOCKER RUN EXAMPLE | |:-----------:|:-------------------------------------------------|----------------------------------------------------------------| | HTTP_PROXY | ENV HTTP_PROXY="http://sample.proxy.com:80" | --env HTTP_PROXY="http://sample.proxy.com:80" | | HTTPS_PROXY | ENV HTTPS_PROXY="https://sample.proxy.com:80" | --env HTTPS_PROXY="https://sample.proxy.com:80" | | FTP_PROXY | ENV FTP_PROXY="ftp://sample.proxy.com:80" | --env FTP_PROXY="ftp://sample.proxy.com:80" | | NO_PROXY | ENV NO_PROXY=".sample.domain1.com,.domain2.com" | --env NO_PROXY=".sample.domain1.com,.domain2.com,127.0.0.0/8" |

docker build with GPG key proxy

  • without proxy

    ...
gpg --batch \
    --keyserver https://keyserver.ubuntu.com:80 \
    --recv-keys 3FA7E0328081BFF6A14DA29AA6A19B38D3D831E
...

# result
gpg: keyserver receive failed: Connection timed out

  • GPG with proxy

    ...
apt-key adv --keyserver-options http-proxy=http://sample.proxy.com:80 \
            --keyserver hkp://keyserver.ubuntu.com:80 \
            --recv-keys 3FA7E0328081BFF6A14DA29AA6A19B38D3D831EF \
...

# result
Executing: /tmp/apt-key-gpghome.uegAG54mKu/gpg.1.sh --keyserver-options http-proxy=http://sample.proxy.com:80 --keyserver hkp://keyserver.ubuntu.com:80 --recv-keys 3FA7E0328081BFF6A14DA29AA6A19B38D3D831EF
gpg: key A6A19B38D3D831EF: 2 signatures not checked due to missing keys
gpg: key A6A19B38D3D831EF: public key "Xamarin Public Jenkins (auto-signing) <releng@xamarin.com>" imported
gpg: Total number processed: 1
gpg:               imported: 1
gpg: keybox '/tmp/tmp.jad0qVCQ6v/pubring.kbx' created
gpg: WARNING: nothing exported
Warning: apt-key output should not be parsed (stdout is not a terminal)

docker for osx

[!TIP|label:references:]

docker: command cannot be found

docker desktop advanced Settings
1.6.2.6.1 -- docker desktop advanced Settings

  • using user

    $ export $HOME/.docker/bin:$PATH

  • using system

    $ ln -sf $HOME/.docker/bin/docker /usr/local/bin/docker
# or
$ ln -s /Applications/Docker.app/Contents/Resources/bin/docker /usr/local/bin/docker

$ sudo ln -s -f $HOME/.docker/run/docker.sock /var/run/docker.sock
    • modify ~/.docker/config.json if necessary
      {
        "auths": {},
-        "credsStore": "desktop",
+        "credStore": "desktop",
        "currentContext": "desktop-linux"
}

command-line auto completion

[!TIP] reference:

Linux

$ dpkg -L docker-ce-cli | grep completion
/usr/share/bash-completion
/usr/share/bash-completion/completions
/usr/share/bash-completion/completions/docker
/usr/share/fish/vendor_completions.d
/usr/share/fish/vendor_completions.d/docker.fish
/usr/share/zsh/vendor-completions
/usr/share/zsh/vendor-completions/_docker
  • rpm
    $ rpm -ql docker-ce | grep completion
/usr/share/bash-completion/completions/docker
/usr/share/fish/vendor_completions.d/docker.fish
/usr/share/zsh/vendor-completions/_docker

setup in bashrc

source /usr/share/bash-completion/completions/docker
alias d='docker'
alias dp='docker ps'

while read -r _i; do
  complete -F _docker "${_i}"
done < <(alias | grep docker | sed '/^alias /!d;s/^alias //;s/=.*$//')
  • more info
    $ source /usr/share/bash-completion/completions/docker
$ type _docker | head
_docker is a function
_docker ()
{
  local previous_extglob_setting=$(shopt -p extglob);
  shopt -s extglob;
}

osx

$ la '/Applications/Docker.app/Contents/Resources/etc'
total 332K
-rwxr-xr-x 1 marslo admin 124K Nov  9 21:50 docker.zsh-completion
-rwxr-xr-x 1 marslo admin  51K Nov  9 21:50 docker.fish-completion
-rwxr-xr-x 1 marslo admin 114K Nov  9 21:50 docker.bash-completion
-rw-r--r-- 1 marslo admin  18K Nov  9 21:50 docker-compose.zsh-completion
-rw-r--r-- 1 marslo admin 1.7K Nov  9 21:50 docker-compose.fish-completion
-rwxr-xr-x 1 marslo admin  13K Nov  9 21:50 docker-compose.bash-completion

$ ln -sf '/Applications/Docker.app/Contents/Resources/etc/docker.bash-completion' $(brew --prefix)/etc/bash_completion.d/docker
$ ln -sf '/Applications/Docker.app/Contents/Resources/etc/docker-compose.bash-completion' $(brew --prefix)/etc/bash_completion.d/docker-compose
  • setup in bashrc
  dockerComp="$(brew --prefix)/etc/bash_completion.d/docker"
  dockerComposeComp="$(brew --prefix)/etc/bash_completion.d/docker-compose"
  [ -f "${dockerComp}" ] && source "${dockerComp}"
  [ -f "${dockerComposeComp}" ] && source "${dockerComposeComp}"

  alias d='docker'
  alias dp='docker ps'
  alias dls='docker ps -l -q'
  alias dps='docker ps -l -a'
  alias di='docker images'
  alias dip="docker inspect --format '{{ .NetworkSettings.IPAddress }}'"

  while read -r _i; do
    complete -F _docker "${_i}"
  done < <(alias | grep docker | sed '/^alias /!d;s/^alias //;s/=.*$//')

others

  • _completion_loader
    _completion_loader()
{
  . "/etc/bash_completion.d/$1.sh" >/dev/null 2>&1 && return 124
}
complete -D -F _completion_loader

complete alias

# for Linux
$ sudo curl -sSLg https://raw.githubusercontent.com/cykerway/complete-alias/master/complete_alias \
            -o /etc/bash_completion.d/complete_alias

# for osx
$ sudo curl -sSLg https://raw.githubusercontent.com/cykerway/complete-alias/master/complete_alias \
            -o $(brew --prefix)/etc/bash_completion.d/complete_alias

  • setup in bash

    source /etc/bash_completion.d/complete_alias
#
source $(brew --prefix)/etc/bash_completion.d/complete_alias

while read -r _i; do
  complete -F _complete_alias "${_i}"
done < <(alias | grep -E 'docker|kubectl' | sed '/^alias /!d;s/^alias //;s/=.*$//')

get tags

from artifactory

  • list repos

    example: the docker registry in artifactory named docker

$ curl -sS https://my.artifactory.com/v2/docker/_catalog |
       jq -r .repositories[]

  • or

    $ curl -sS -X GET https://my.artifactory.com/artifactory/api/docker/docker/v2/_catalog |
       jq -r .repositories[]

  • list tags

    example: get tags from repo devops/ubuntu

$ curl -sS https://my.artifactory.com/artifactory/v2/docker/devops/ubuntu/tags/list [ | jq -r .tags[] ]
  • or
    $ curl -sS -X GET https://my.artifactory.com/artifactory/api/docker/docker/v2/devops/ubuntu/tags/list

from docker hub

$ curl -sS 'https://hub.docker.com/v2/repositories/jenkins/jenkins/tags' |
       jq --raw-output .results[].name

jdk8-openj9-windowsservercore-1809
jdk11-hotspot-windowsservercore-1809
jdk11-openj9-windowsservercore-1809
windowsservercore-1809
jdk8-hotspot-windowsservercore-1809
2.249.3-lts-centos7
lts-centos7
centos7
2.249.3-lts-centos
lts-centos

  • get more

    $ curl -sS 'https://hub.docker.com/v2/repositories/jenkins/jenkins/tags?page_size=100&ordering=last_updated' |
       jq --raw-output .results[].name |
       sort
    • or
      $ curl -sS https://hub.docker.com/v2/repositories/jenkins/jenkins/tags?page=2 |
       jq '."results"[]["name"]' |
       sort

  • get multiple pages

    $ while read -r _i; do
    curl -sSgk "https://registry.hub.docker.com/v2/repositories/jenkins/jenkins/tags?&page=${_i}&page_size=100" |
         jq -r '.results[] | select( .name | contains("-lts-") ) | .name';
  done < <(echo {1..10} | fmt -1)

  • via docker registry tags/list API v2

    [!NOTE|label:references:]

    $ cat > docker-tags.sh << EOF
#!/usr/bin/env bash
set -eu -o pipefail
docker_tags() {
  item="$1"
  case "$item" in
      */*) :                    ;; # namespace/repository syntax, leave as is
        *) item="library/$item" ;; # bare repository name (docker official image); must convert to namespace/repository syntax
  esac
  authUrl="https://auth.docker.io/token?service=registry.docker.io&scope=repository:$item:pull"
  token="$(curl -fsSL "$authUrl" | jq --raw-output '.token')"
  tagsUrl="https://registry-1.docker.io/v2/$item/tags/list"
  curl -fsSL -H "Accept: application/json" -H "Authorization: Bearer $token" "$tagsUrl" | jq --raw-output '.tags[]'
}
docker_tags "$@"
EOF

$ bash docker-tags.sh jenkins/jenkins | sort -r | grep --color=never -- '-lts-jdk11' | head -3
2.440.2-lts-jdk11
2.440.1-lts-jdk11
2.426.3-lts-jdk11

simple script for get tags

#!/bin/sh
#
# Simple script that will display docker repository tags.
#
# Usage:
#   $ docker-show-repo-tags.sh ubuntu centos

for _r in $* ; do
  curl -sS "https://registry.hub.docker.com/v2/repositories/library/$_r/tags/" |
       sed -e 's/,/,\n/g' -e 's/\[/\[\n/g' |
       grep '"name"' |
       awk -F\" '{print $4;}' |
       sort -fu |
       sed -e "s/^/${_r}:/"
done

get current container ID

$ basename $(cat /proc/self/cpuset)
ab8c1732f1a3fdb46b9f9a477f0fbcc1d23c6787d7532648242a76d6eb1e8b84
  • or
    $ hostname
ab8c1732f1a3

get volume from container ID

$ docker inspect -f '{{ .Mounts }}' <container ID>

  • or

    $ docker inspect <container ID> |
         grep volume

  • or get all

    $ docker ps -a --no-trunc --format "{{.ID}}\t{{.Names}}\t{{.Mounts}}"
  • or
    $ docker inspect <container ID> |
         jq --raw-output .[].Mounts

  • or

    $ docker ps -q |
         xargs docker container inspect -f '{{ .Name }} {{ .HostConfig.Binds }}'

mount volume in DinD

reference:

$ cid=$(basename $(cat /proc/self/cpuset))
$ VOLUME_OPTION="--volumes-from ${cid}:rw"
$ docker run <...> ${VOLUME_OPTION}

run inside windows docker image

add contents

> docker exec [-w 'C:\workspace'] <docker-id> powershell "Set-Content -Path '_cmd.ps1' -Value 'python --version'"
  • for multiple line contents
    > docker exec [-w 'C:\workspace'] <docker-id>' powershell "Set-Content -Path .\test.py -Value '# content of test_sample.py
>> def func(x):
>>     return x + 1
>>
>>
>> def test_answer():
>>     assert func(4) == 5'"

get contents

> docker exec [-w 'C:\workspace'] <docker-id> powershell "Get-Content '_cmd.ps1'"

  • equivalent tail -f

    > docker exec [-w 'C:\workspace'] <docker-id> powershell "Get-Content '_cmd.ps1' -Wait"

  • equivalent tail -10

    > docker exec [-w 'C:\workspace'] <docker-id> powershell "Get-Content '_cmd.ps1' -Tail 10"

list item

> docker exec [-w 'C:\workspace'] <docker-id> powershell Get-ChildItem .
> docker exec [-w 'C:\workspace'] <docker-id> powershell Get-ChildItem ..\

execute

> docker exec [-w 'C:\workspace'] <docker-id> powershell .\_cmd.ps1

# or
> docker exec [-w 'C:\workspace'] <docker-id> powershell "Invoke-Expression '.\_cmd.ps1' > log.txt"

# or redirect via `Out-File`
> docker exec [-w 'C:\workspace'] <docker-id> powershell "Invoke-Expression '.\_cmd.ps1' | Out-File -FilePath log.txt"

troubleshooting

permission denied while trying to connect to the Docker daemon socket

[!NOTE|label:see also:]

  • issue shows even if the account exists in docker group

    # account already been added in `docker` group
$ id marslo
uid=1100(marslo) gid=1100(marslo) groups=1100(marslo),994(docker)
$ docker ps
permission denied while trying to connect to the Docker daemon socket at unix:///var/run/docker.sock: Get "http://%2Fvar%2Frun%2Fdocker.sock/v1.44/containers/json": dial unix /var/run/docker.sock: connect: permission denied

# group info
$ getent group docker
docker:x:994:devops,marslo
$ getent group 994
docker:x:994:devops,marslo

# remote
$ sudo gpasswd -d marslo docker
Removing user marslo from group docker
$ id marslo
uid=1100(marslo) gid=1100(marslo) groups=1100(marslo)

# re-added
$ sudo usermod -aG docker marslo
$ id marslo
uid=1100(marslo) gid=1100(marslo) groups=1100(marslo),994(docker)
$ docker ps
permission denied while trying to connect to the Docker daemon socket at unix:///var/run/docker.sock: Get "http://%2Fvar%2Frun%2Fdocker.sock/v1.44/containers/json": dial unix /var/run/docker.sock: connect: permission denied

  • root cause

    # docker group-id was 990, and it was changed to 994; but the `/var/run/docker.sock` wasn't been changed
$ ls -asltrh /var/run/docker.sock
0 srw-rw---- 1 root redwillow 0 Mar  7 15:27 /var/run/docker.sock

  • solution

    $ sudo chown -R root:docker /var/run/docker.sock
$ docker ps
CONTAINER ID   IMAGE     COMMAND   CREATED   STATUS    PORTS     NAMES

# to change all after GID changed
$ find / -gid OLD_GID ! -type l -exec chgrp NEW_GID {} \;
Copyright © marslo 2020-2023 all right reserved，powered by GitbookLast Modified: 2024-03-22 12:21:38

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