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Implement 'bocker pull' for Docker Hub integration
This commit is contained in:
Peter Wilmott
parent
d5b38393c2
commit
b240a47ac8
61
README.md
61
README.md
@ -12,6 +12,7 @@ Docker implemented in 100 lines of bash.
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The following packages are needed to run bocker.
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* btrfs-progs
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* curl
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* iproute2
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* iptables
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* util-linux >= 2.25.2
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@ -34,30 +35,33 @@ Even if you meet the above prerequisites you probably still want to **run bocker
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## Example Usage
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```
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$ bocker init base-image/
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Created: img_84632
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$ bocker pull centos 7
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######################################################################## 100.0%
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######################################################################## 100.0%
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######################################################################## 100.0%
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Created: img_42150
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$ bocker images
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IMAGE_ID
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img_84632
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IMAGE_ID SOURCE
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img_42150 centos:7
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$ bocker run img_84632 uname -sro
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Linux 3.10.0-123.20.1.el7.x86_64 GNU/Linux
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$ bocker run img_42150 cat /etc/centos-release
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CentOS Linux release 7.1.1503 (Core)
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$ bocker ps
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CONTAINER_ID COMMAND
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ps_12277 uname -sro
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ps_42045 cat /etc/centos-release
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$ bocker logs ps_12277
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Linux 3.10.0-123.20.1.el7.x86_64 GNU/Linux
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$ bocker logs ps_42045
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CentOS Linux release 7.1.1503 (Core)
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$ bocker rm ps_12277
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Removed: ps_12277
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$ bocker rm ps_42045
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Removed: ps_42045
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$ bocker run img_84632 which wget
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$ bocker run img_42150 which wget
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which: no wget in (/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/root/bin)
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$ bocker run img_84632 yum install -y wget
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$ bocker run img_42150 yum install -y wget
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Installing : wget-1.14-10.el7_0.1.x86_64 1/1
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Verifying : wget-1.14-10.el7_0.1.x86_64 1/1
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Installed : wget.x86_64 0:1.14-10.el7_0.1
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@ -65,35 +69,25 @@ Complete!
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$ bocker ps
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CONTAINER_ID COMMAND
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ps_14099 which wget
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ps_43377 yum install -y wget
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ps_42018 yum install -y wget
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ps_42182 which wget
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$bocker commit ps_43377 img_84632
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Removed: img_84632
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Created: img_84632
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$ bocker commit ps_42018 img_42150
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Removed: img_42150
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Created: img_42150
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$ bocker run img_84632 which wget
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$ bocker run img_42150 which wget
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/usr/bin/wget
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$ bocker rm ps_14099
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Removed: ps_14099
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$ bocker rm ps_43377
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Removed: ps_43377
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$ bocker rm ps_95942
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Removed: ps_95942
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$ bocker rm img_84632
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Removed: img_84632
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```
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## Functionality: Currently Implemented
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* `docker build` †
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* `docker pull`
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* `docker images`
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* `docker ps`
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* `docker run`
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* `docker exec`
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* `docker logs`
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* `docker commit`
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* `docker rm` / `docker rmi`
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@ -103,9 +97,10 @@ Removed: img_84632
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## Functionality: Not Yet Implemented
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* Port Forwarding
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* Data Volumes
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* Data Volume Containers
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* Data Volumes
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* Port Forwarding
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* Quota Support / CGroups
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## License
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24
bocker
24
bocker
@ -4,26 +4,42 @@ btrfs_path='/var/bocker';
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function bocker_check() {
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btrfs subvolume list "$btrfs_path" | grep -qw "$1" && echo 0 || echo 1
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}
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function bocker_init() { #HELP Create an image:\nBOCKER init <image_directory>
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function bocker_init() { #HELP Create an image from a directory:\nBOCKER init <directory>
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uuid="img_$(shuf -i 42002-42254 -n 1)"
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if [[ -d "$1" ]]; then
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[[ "$(bocker_check "$uuid")" == 0 ]] && bocker_run "$@"
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btrfs subvolume create "$btrfs_path/$uuid" > /dev/null
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cp -rf --reflink=auto "$1"/* "$btrfs_path/$uuid" > /dev/null
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[[ ! -f "$btrfs_path/$uuid"/img.source ]] && echo "$1" > "$btrfs_path/$uuid"/img.source
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echo "Created: $uuid"
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else
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echo "No directory named '$1' exists"
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fi
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}
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function bocker_pull() { #HELP Pull an image from Docker Hub:\nBOCKER pull <name> <tag>
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token="$(curl -sL -o /dev/null -D- -H 'X-Docker-Token: true' "https://index.docker.io/v1/repositories/$1/images" | tr -d '\r' | awk -F ': *' '$1 == "X-Docker-Token" { print $2 }')"
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registry='https://registry-1.docker.io/v1'
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id="$(curl -sL -H "Authorization: Token $token" "$registry/repositories/$1/tags/$2" | sed 's/"//g')"
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[[ "${#id}" -ne 64 ]] && echo "No image named '$1:$2' exists" && exit 1
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ancestry="$(curl -sL -H "Authorization: Token $token" "$registry/images/$id/ancestry")"
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IFS=',' && ancestry=(${ancestry//[\[\] \"]/}) && unset IFS; tmp_uuid="$(uuidgen)" && mkdir /tmp/"$tmp_uuid"
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for id in "${ancestry[@]}"; do
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curl -#L -H "Authorization: Token $token" "$registry/images/$id/layer" -o /tmp/"$tmp_uuid"/layer.tar
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tar xf /tmp/"$tmp_uuid"/layer.tar -C /tmp/"$tmp_uuid" && rm /tmp/"$tmp_uuid"/layer.tar
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done
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echo "$1:$2" > /tmp/"$tmp_uuid"/img.source
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bocker_init /tmp/"$tmp_uuid" && rm -rf /tmp/"$tmp_uuid"
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}
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function bocker_rm() { #HELP Delete an image or container:\nBOCKER rm <image_id or container_id>
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[[ "$(bocker_check "$1")" == 1 ]] && echo "No container named '$1' exists" && exit 1
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btrfs subvolume delete "$btrfs_path/$1" > /dev/null
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echo "Removed: $1"
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}
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function bocker_images() { #HELP List images:\nBOCKER images
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echo -e "IMAGE_ID"
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echo -e "IMAGE_ID\t\tSOURCE"
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for img in "$btrfs_path"/img_*; do
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basename "$img"
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img=$(basename "$img")
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echo -e "$img\t\t$(cat "$btrfs_path/$img/img.source")"
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done
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}
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function bocker_ps() { #HELP List containers:\nBOCKER ps
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@ -77,6 +93,6 @@ sed -n "s/^.*#HELP\\s//p;" < "$1" | sed "s/\\\\n/\n\t/g;s/$/\n/;s!BOCKER!${1/!/\
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}
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[[ -z "${1-}" ]] && bocker_help "$0"
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case $1 in
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init|rm|images|ps|run|exec|logs|commit) bocker_"$1" "${@:2}" ;;
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pull|init|rm|images|ps|run|exec|logs|commit) bocker_"$1" "${@:2}" ;;
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*) bocker_help "$0" ;;
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esac
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@ -1,7 +1,7 @@
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#!/usr/bin/env bash
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set -o errexit -o nounset -o pipefail
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for img in $(./bocker images | grep 'img'); do
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for img in $(./bocker images | grep 'img' | awk '{print $1}'); do
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./bocker rm "$img"
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done
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@ -1,4 +1,4 @@
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#!/usr/bin/env bash
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set -o errexit -o nounset -o pipefail
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[[ "$(./bocker images | head -n 1)" == 'IMAGE_ID' ]]
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[[ "$(./bocker images | head -n 1)" == 'IMAGE_ID SOURCE' ]]
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16
tests/test_pull
Normal file
16
tests/test_pull
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#!/usr/bin/env bash
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set -o errexit -o nounset -o pipefail
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centos_img="$(./bocker pull centos 7 2> /dev/null | awk '{print $2}')"
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./bocker run "$centos_img" cat /etc/redhat-release
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ps="$(./bocker ps | grep 'cat /etc/redhat-release' | awk '{print $1}')"
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logs="$(./bocker logs "$ps")"
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./bocker rm "$ps"
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[[ "$logs" == "CentOS Linux release 7"* ]]
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ubuntu_img="$(./bocker pull ubuntu 14.04 2> /dev/null | awk '{print $2}')"
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./bocker run "$ubuntu_img" tail -n1 /etc/lsb-release
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ps="$(./bocker ps | grep 'tail -n1 /etc/lsb-release' | awk '{print $1}')"
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logs="$(./bocker logs "$ps")"
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./bocker rm "$ps"
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[[ "$logs" == *"Ubuntu 14.04"* ]]
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