Initial Commit to docker branch.
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24
Dockerfile
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Dockerfile
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FROM alpine:3.6
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MAINTAINER William Hindes <bhindes@hotmail.com>
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ENV GOPATH="/usr/bin"
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ENV GOROOT="/usr/lib/go"
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RUN apk --update --no-cache add docker sudo bash && \
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apk upgrade --update && \
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apk add --no-cache --virtual=.build-dependencies ca-certificates python2 wget go make \
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autoconf findutils make pkgconf libtool g++ automake linux-headers git && \
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wget "https://storage.googleapis.com/kubernetes-release/release/v1.8.0/bin/linux/amd64/kubectl" -O "/usr/local/bin/kubectl" && \
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mkdir -p /usr/bin/src/k8s.io && cd /usr/bin/src/k8s.io && chmod +x /usr/local/bin/kubectl && \
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git clone https://github.com/kubernetes/minikube && cd minikube && \
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make && mv ./out/minikube /usr/local/bin/minikube && rm -rf /usr/bin/src/k8s.io && rm -rf /tmp/* && \
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minikube start --vm-driver none --kubernetes-version v1.7.5 -v 7 --memory 1024 --disk-size 4g && \
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apk del .build-dependencies
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ADD ./dockerd-entrypoint.sh /usr/local/bin/
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ADD ./dockerd-cmd.sh /usr/local/bin/
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ADD ./setup-compose /usr/local/bin/
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EXPOSE 2375 30000
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ENTRYPOINT ["dockerd-entrypoint.sh"]
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CMD ["dockerd-cmd.sh"]
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73
README.md
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73
README.md
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![Docker](https://msopentech.com/wp-content/uploads/docker-logo.png)
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# About
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Pure alpine linux docker. Docker inside docker.
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> [wikipedia.org/wiki/Docker](https://en.wikipedia.org/wiki/Docker_(software))
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# Usage
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## System Requirements
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The ~700Mb image has an already created minkikube instance with 4Gb diskspace and 1Gb RAM.
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This is only for experimentation and demo only. Do not use in production. The minikube binary from the official
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repository does not work in Alpine and had to be built from source. (See Dockerfile)
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## Commandline
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Starts a shell ready to docker & minikube
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```bash
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docker run -ti --privileged whindes/alpine-minikube sh
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```
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## Minikube
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After the commands below navigate to http://<your_host_docker>:30000/#!/overview?namespace=default
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```bash
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docker run -ti -p 30000 -p 31920 --rm --privileged whindes/alpine-minikube sh
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[Hit Enter] to get the shell prompt
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minikube start
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kubectl run webserver --image=nginx:alpine
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kubectl expose deployment webserver --type=LoadBalancer --port=80
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```
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## Daemon
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```bash
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docker run --name alpine-docker -p 2375:2375 --privileged -d whindes/alpine-minikube
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```
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To start a shell in your new container.
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```bash
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docker exec -ti alpine-docker /bin/sh
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```
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## Inside the container shell
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Now you can start containers inside your alpine-docker container.
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```bash
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docker run -d elasticsearch
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docker images
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docker ps -a
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docker volume ls
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```
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## Docker-compose
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If you need docker-compose inside your alpine-docker container.
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```bash
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setup-compose
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docker-compose up
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```
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## Remote docker
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Set your client system variables and go
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```bash
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export DOCKER_API_VERSION=1.23
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export DOCKER_HOST='tcp://127.0.0.1:2375'
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docker ps
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docker-compose up
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```
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3
dockerd-cmd.sh
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dockerd-cmd.sh
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#!/bin/sh
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echo "Starting Docker Daemon"
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docker daemon --host=unix:///var/run/docker.sock --host=tcp://0.0.0.0:2375 --storage-driver=vfs
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22
dockerd-entrypoint.sh
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dockerd-entrypoint.sh
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#!/bin/sh
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#clean pid after unexpected kill
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if [ -f "/var/run/docker.pid" ]; then
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rm -rf /var/run/docker.pid
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fi
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# Add docker daemon as command if needed
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if [[ "$1" != 'dockerd-cmd.sh' ]]; then
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echo "Starting Docker Daemon"
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docker daemon \
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--host=unix:///var/run/docker.sock \
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--host=tcp://0.0.0.0:2375 \
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--storage-driver=vfs &
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fi
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# set docker settings
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echo "export DOCKER_HOST='tcp://127.0.0.1:2375'" >> /etc/profile
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# reread all config
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source /etc/profile
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exec "$@"
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6
setup-compose
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6
setup-compose
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#!/bin/sh
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apk add --update openssl
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wget https://github.com/docker/compose/releases/download/1..16.1/run.sh -O /usr/local/bin/docker-compose
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sed -i "s/\/bin\/bash/\/bin\/sh/g" /usr/local/bin/docker-compose
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chmod a+x /usr/local/bin/docker-compose
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docker-compose --help
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