Add Docker Container Images for beacon-chain and client (#314)

* Add docker container images for beacon-chain and client

* Add docker section to README

.travis.yml

@@ -52,6 +52,12 @@ matrix:
       install: true # Skip install go packages.
           
       script:
+        # Ensure everything builds
+        - |
+          bazel \
+            --bazelrc=.travis-bazelrc \
+            build \
+            //...
         # Run all tests.
         - |
           bazel \

README.md

@@ -139,6 +139,33 @@ bazel run //client -- \
 
 Omitting the `--actor` flag will launch a simple observer service attached to the sharding client that is able to listen to changes happening throughout the sharded Ethereum network on shard 0.
 
+## Running via Docker
+
+To run the client within a docker container, use the `//client:image` target.
+
+```text
+bazel run //client:image
+
+INFO: Build options have changed, discarding analysis cache.
+INFO: Analysed target //client:image (306 packages loaded).
+INFO: Found 1 target...
+Target //client:image up-to-date:
+  bazel-bin/client/image-layer.tar
+INFO: Elapsed time: 8.568s, Critical Path: 0.22s
+INFO: 0 processes.
+INFO: Build completed successfully, 1 total action
+INFO: Build completed successfully, 1 total action
+37fd88e7190b: Loading layer  22.42MB/22.42MB
+Loaded image ID: sha256:89b233de1a026eddeeff010fa1ef596ce791cb3f26488150aac72a91b80734c1
+Tagging 89b233de1a026eddeeff010fa1ef596ce791cb3f26488150aac72a91b80734c1 as bazel/client:image
+...
+```
+
+TODO: Add [container_push](https://github.com/bazelbuild/rules_docker/#container_push-1) 
+targets for the container images such that they can be pulled from GCR or 
+dockerhub. 
+
+
 # Making Changes
 
 ## Rebuilding the Sharding Manager Contract Bindings

WORKSPACE

@@ -12,6 +12,13 @@ http_archive(
     sha256 = "bc653d3e058964a5a26dcad02b6c72d7d63e6bb88d94704990b908a1445b8758",
 )
 
+http_archive(
+    name = "io_bazel_rules_docker",
+    sha256 = "6dede2c65ce86289969b907f343a1382d33c14fbce5e30dd17bb59bb55bb6593",
+    strip_prefix = "rules_docker-0.4.0",
+    urls = ["https://github.com/bazelbuild/rules_docker/archive/v0.4.0.tar.gz"],
+)
+
 load("@io_bazel_rules_go//go:def.bzl", "go_rules_dependencies", "go_register_toolchains")
 
 go_rules_dependencies()
@@ -22,6 +29,15 @@ load("@bazel_gazelle//:deps.bzl", "gazelle_dependencies", "go_repository")
 
 gazelle_dependencies()
 
+load(
+    "@io_bazel_rules_docker//go:image.bzl",
+    _go_image_repos = "repositories",
+)
+
+_go_image_repos()
+
+# External dependencies
+
 go_repository(
     name = "com_github_ethereum_go_ethereum",
     importpath = "github.com/ethereum/go-ethereum",

beacon-chain/BUILD.bazel

@@ -1,4 +1,5 @@
 load("@io_bazel_rules_go//go:def.bzl", "go_binary", "go_library")
+load("@io_bazel_rules_docker//go:image.bzl", "go_image")
 
 go_library(
     name = "go_default_library",
@@ -16,6 +17,24 @@ go_library(
     ],
 )
 
+go_image(
+    name = "image",
+    srcs = ["main.go"],
+    goarch = "amd64",
+    goos = "linux",
+    importpath = "github.com/prysmaticlabs/prysm/beacon-chain",
+    static = "on",
+    deps = [
+        "//beacon-chain/node:go_default_library",
+        "//beacon-chain/utils:go_default_library",
+        "//shared/cmd:go_default_library",
+        "//shared/debug:go_default_library",
+        "@com_github_sirupsen_logrus//:go_default_library",
+        "@com_github_urfave_cli//:go_default_library",
+        "@com_github_x_cray_logrus_prefixed_formatter//:go_default_library",
+    ],
+)
+
 go_binary(
     name = "beacon-chain",
     embed = [":go_default_library"],

client/BUILD.bazel

@@ -1,4 +1,5 @@
 load("@io_bazel_rules_go//go:def.bzl", "go_binary", "go_library")
+load("@io_bazel_rules_docker//go:image.bzl", "go_image")
 
 go_library(
     name = "go_default_library",
@@ -16,6 +17,24 @@ go_library(
     ],
 )
 
+go_image(
+    name = "image",
+    srcs = ["main.go"],
+    goarch = "amd64",
+    goos = "linux",
+    importpath = "github.com/prysmaticlabs/prysm/client",
+    static = "on",
+    deps = [
+        "//client/node:go_default_library",
+        "//client/utils:go_default_library",
+        "//shared/cmd:go_default_library",
+        "//shared/debug:go_default_library",
+        "@com_github_sirupsen_logrus//:go_default_library",
+        "@com_github_urfave_cli//:go_default_library",
+        "@com_github_x_cray_logrus_prefixed_formatter//:go_default_library",
+    ],
+)
+
 go_binary(
     name = "client",
     embed = [":go_default_library"],