Add docker image (#375)

* Add Dockerfile

Add documentation

Ref #375

* Add PORT, VOLUME and reduce size of the docker image significantly

Fix doc and reduce image size

Fix #375

* Fix docker compose

.gitignore

@@ -12,4 +12,5 @@ substrate/pwasm-libc/Cargo.lock
 demo/runtime/wasm/target/
 **/._*
 .vscode
-polkadot.*
+polkadot.*
+.DS_Store

README.adoc

@@ -6,6 +6,7 @@
 
 Implementation of a https://polkadot.network node in Rust.
 
+
 == To play
 
 If you'd like to play with Polkadot, you'll need to install a client like this
@@ -46,6 +47,7 @@ polkadot --dev
 
 You can muck around by cloning and building the http://github.com/paritytech/polka-ui and http://github.com/paritytech/polkadot-ui or just heading to https://polkadot.js.org/apps.
 
+
 == Local Two-node Testnet
 
 If you want to see the multi-node consensus algorithm in action locally, then
@@ -62,6 +64,7 @@ polkadot --chain=local --validator --key Bob -d /tmp/bob --port 30334 --bootnode
 Ensure you replace `ALICE_BOOTNODE_ID_HERE` with the node ID from the output of
 the first terminal.
 
+
 == Hacking on Polkadot
 
 If you'd actually like hack on Polkadot, you can just grab the source code and
@@ -74,7 +77,7 @@ rustup update nightly
 rustup target add wasm32-unknown-unknown --toolchain nightly
 rustup update stable
 cargo install --git https://github.com/alexcrichton/wasm-gc
-sudo apt install cmake pkg-config libssl-dev
+sudo apt install cmake pkg-config libssl-dev git
 ----
 
 Then, grab the Polkadot source code:
@@ -103,4 +106,91 @@ You can start a development chain with:
 [source, shell]
 cargo run -- --dev
 
+
+== Using Docker
+
+=== The easiest way
+
+The easiest/faster option is to use the latest image.
+
+Let´s first check the version we have. The first time you run this command, the polkadot docker image will be downloaded. This takes a bit of time and bandwidth, be patient:
+
+[source, shell]
+docker run --rm -it chevdor/polkadot:0.2.0 ./version
+
+You can also pass any argument/flag that polkadot supports:
+
+[source, shell]
+docker run --rm -it chevdor/polkadot:0.2.0 polkadot --name "PolkaDocker"
+
+Once you are done experimenting and picking the best node name :) you can start polkadot as daemon, exposes the polkadot ports and mount a volume that will keep your blockchain data locally:
+
+[source, shell]
+docker run -d -p 30333:30333 -p 9933:9933 -v /my/local/folder:/data chevdor/polkadot:0.2.0 polkadot
+
+
+=== Build your own image
+
+To get up and running with the smallest footprint on your system, you may use the Polkadot Docker image.
+You can either build it yourself (it takes a while...):
+
+[source, shell]
+----
+ccd docker
+./build.sh
+----
+
+=== Reporting issues
+
+If you run into issues with polkadot when using docker, please run the following command
+(replace the tag with the appropriate one if you do not use latest):
+
+[source, shell]
+docker run --rm -it chevdor/polkadot:latest version
+
+This will show you the polkadot version as well as the git commit ref that was used to build your container.
+Just paste that in the issue you create.
+
+
+== Shell completion
+
+The Polkadot cli command supports shell auto-completion. For this to work, you will need to run the completion script matching you build and system.
+
+Assuming you built a release version using `cargo build --release` and use `bash` run the following:
+
+[source, shell]
+source target/release/completion-scripts/polkadot.bash
+
+You can find completion scripts for:
+- bash
+- fish
+- zsh
+- elvish
+- powershell
+
+To make this change persistent, you can proceed as follow:
+
+=== First install
+
+[source, shell]
+----
+COMPL_DIR=$HOME/.completion
+mkdir -p $COMPL_DIR
+cp -f target/release/completion-scripts/polkadot.bash $COMPL_DIR/
+echo "source $COMPL_DIR/polkadot.bash" >> $HOME/.bash_profile
+source $HOME/.bash_profile
+----
+
+=== Update
+
+When you build a new version of Polkadot, the following will ensure you auto-completion script matches the current binary:
+
+[source, shell]
+----
+COMPL_DIR=$HOME/.completion
+mkdir -p $COMPL_DIR
+cp -f target/release/completion-scripts/polkadot.bash $COMPL_DIR/
+source $HOME/.bash_profile
+----
+
 include::doc/packages.adoc[]

docker/Dockerfile

@@ -0,0 +1,33 @@
+FROM phusion/baseimage:0.10.1
+LABEL maintainer "chevdor@gmail.com"
+
+ARG PROFILE=release
+
+RUN mkdir -p polkadot && \
+	apt-get update && \
+	apt-get upgrade -y && \
+	apt-get install -y cmake pkg-config libssl-dev git && \
+	apt-get clean && \
+	mkdir -p /root/.local/share/Polkadot && \
+	ln -s /root/.local/share/Polkadot /data
+
+RUN curl https://sh.rustup.rs -sSf | sh -s -- -y && \
+	export PATH=$PATH:$HOME/.cargo/bin && \
+	rustup update nightly && \
+	rustup target add wasm32-unknown-unknown --toolchain nightly && \
+	rustup update stable && \
+	cargo install --git https://github.com/alexcrichton/wasm-gc && \
+	git clone https://github.com/paritytech/polkadot.git && \
+	cd polkadot && \
+	./build.sh && \
+	cargo build --$PROFILE && \
+	mv target/$PROFILE/polkadot /usr/local/bin && \
+	cargo clean && \
+	rm -rf /root/.cargo /root/.rustup /tmp/*
+
+COPY version /polkadot
+WORKDIR /polkadot
+EXPOSE 30333 9933
+VOLUME ["/data"]
+
+CMD ["/bin/sh", "polkadot"]

docker/build.sh

@@ -0,0 +1,18 @@
+#!/usr/bin/env bash
+set -e
+
+# Find the current version from Cargo.toml
+VERSION=`grep "^version" ../Cargo.toml | egrep -o "([0-9\.]+)"`
+GITUSER=chevdor
+GITREPO=polkadot
+
+# Build the image
+echo "Building ${GITREPO}:$VERSION docker image, hang on!"
+time docker build --build-arg PROFILE=release -t ${GITUSER}/${GITREPO}:$VERSION .
+
+# Show the list of available images for this repo
+echo "Image is ready"
+docker images | grep ${GITREPO}
+
+echo -e "\nIf you just built the latest, you may want to update your tag:"
+echo " $ docker tag ${GITUSER}/${GITREPO}:$VERSION ${GITUSER}/${GITREPO}:latest"

docker/cleanup.sh

@@ -0,0 +1,8 @@
+#!/usr/bin/env bash
+# This script helps reduce the size of the built image
+# It removes data that is not required.
+
+export PATH=$PATH:$HOME/.cargo/bin
+
+cargo clean
+rm -rf /root/.cargo /root/.rustup /tmp/*

docker/docker-compose.yml

@@ -0,0 +1,15 @@
+version: '3'
+services:
+  polkadot:
+    build:
+      context: .
+    ports:
+      - "127.0.0.1:30333:30333/tcp"
+      - "127.0.0.1:9933:9933/tcp"
+    image: chevdor/polkadot:latest
+    volumes:
+      - "polkadot-data:/data"
+    command: polkadot
+
+volumes:
+  polkadot-data:

docker/readme-docker.adoc

@@ -0,0 +1,16 @@
+
+== Polkadot Docker
+
+=== Start a Polkadot docker container
+
+Run the following command
+
+	docker run -d chevdor/polkadot:latest polkadot
+
+=== Building the image
+
+To build your own image from the source, you can run the following command:
+
+	./build.sh
+
+NOTE: Building the image takes a while. Count at least 30min on a good machine.

docker/version

@@ -0,0 +1,13 @@
+#!/usr/bin/env bash
+# This script show the polkadot version and commit ref that was
+# used to build the image.
+# If you report an issue, call this script to get all details.
+# This script will no longer be required once the polkadot cli
+# can report its commit ref.
+
+echo "-----------------------------------------"
+printf "Polkadot Docker Container: "
+polkadot --version
+printf " "
+git rev-parse HEAD
+echo "-----------------------------------------"