protocols/relay: Simplify running the relay example

with all peers run together via docker compose libp2p#2052

.dockerignore

@@ -0,0 +1,29 @@
+**/.classpath
+**/.dockerignore
+**/.env
+**/.git
+**/.gitignore
+**/.project
+**/.settings
+**/.toolstarget
+**/.vs
+**/.vscode
+**/*.*proj.user
+**/*.dbmdl
+**/*.jfm
+**/azds.yaml
+**/bin
+**/charts
+**/docker-compose*
+**/compose*
+**/Dockerfile*
+**/node_modules
+**/npm-debug.log
+**/obj
+**/secrets.dev.yaml
+**/values.dev.yaml
+README.md
+**/target
+**/Cargo.lock
+**/docker-compose.debug.yml
+**/docker-compose.yml

protocols/relay/Cargo.toml

@@ -30,6 +30,8 @@ prost-build = "0.7"
 
 [dev-dependencies]
 env_logger = "0.8.3"
+hex = "0.4.2"
+structopt = "0.3.21"
 libp2p = { path = "../.." }
 libp2p-kad = { path = "../kad" }
 libp2p-ping = { path = "../ping" }

protocols/relay/examples/Dockerfile

@@ -0,0 +1,22 @@
+# 1: Build the exe
+FROM rust:latest as builder
+LABEL Name=libp2p-relay Version=0.0.1
+# 1a: Prepare for static linking
+RUN apt-get update && \
+    apt-get dist-upgrade -y && \
+    apt-get install -y musl-tools && \
+    rustup target add x86_64-unknown-linux-musl
+# 1b: Download and compile Rust dependencies (and store as a separate Docker layer)
+RUN USER=root cargo new rust-libp2p
+WORKDIR /usr/src/libp2p
+
+COPY . /usr/src/libp2p
+RUN cargo build --target x86_64-unknown-linux-musl --example=relay --package=libp2p-relay
+
+# 2: Copy the exe and extra files ("static") to an empty Docker image
+FROM debian:buster-slim
+
+COPY --from=builder /usr/src/libp2p/target/x86_64-unknown-linux-musl/debug/examples/relay .
+USER 1000
+
+ENTRYPOINT ./relay -d $deterministic_peer_env --mode $relay_command_arg_env --address $address_env

protocols/relay/examples/docker-compose.yml

@@ -0,0 +1,56 @@
+version: '3.4'
+services:
+  relay: 
+    image: libp2p-relay
+    environment:
+      - relay_command_arg_env=relay
+      - deterministic_peer_env=1
+      # - address_env=/ip4/0.0.0.0/tcp/4444
+      - address_env=/ip6/2001:3984:3989::10/tcp/4444
+    build:
+      context: ../../../.
+      dockerfile: ./protocols/relay/examples/Dockerfile
+    networks:
+      default:
+        ipv4_address: 172.16.238.10
+        ipv6_address: 2001:3984:3989::10
+
+  client-listen: 
+    image: libp2p-relay
+    environment:
+      - relay_command_arg_env=client-listen
+      - deterministic_peer_env=2
+      # - address_env=/ip4/172.16.238.10/tcp/4444/p2p/12D3KooWPjceQrSwdWXPyLLeABRXmuqt69Rg3sBYbU1Nft9HyQ6X/p2p-circuit
+      - address_env=/ip6/2001:3984:3989::10/tcp/4444/p2p/12D3KooWPjceQrSwdWXPyLLeABRXmuqt69Rg3sBYbU1Nft9HyQ6X/p2p-circuit
+    build:
+      context: ../../../.
+      dockerfile: ./protocols/relay/examples/Dockerfile
+    networks:
+      default:
+        ipv4_address: 172.16.238.11
+        ipv6_address: 2001:3984:3989::11
+  client-dial: 
+    image: libp2p-relay
+    environment:
+      - relay_command_arg_env=client-dial
+      - deterministic_peer_env=3
+      # - address_env=/ip4/172.16.238.10/tcp/4444/p2p/12D3KooWPjceQrSwdWXPyLLeABRXmuqt69Rg3sBYbU1Nft9HyQ6X/p2p-circuit/p2p/12D3KooWH3uVF6wv47WnArKHk5p6cvgCJEb74UTmxztmQDc298L3
+      - address_env=/ip6/2001:3984:3989::10/tcp/4444/p2p/12D3KooWPjceQrSwdWXPyLLeABRXmuqt69Rg3sBYbU1Nft9HyQ6X/p2p-circuit/p2p/12D3KooWH3uVF6wv47WnArKHk5p6cvgCJEb74UTmxztmQDc298L3
+    build:
+      context: ../../../.
+      dockerfile: ./protocols/relay/examples/Dockerfile
+    networks:
+      default:
+        ipv4_address: 172.16.238.12
+        ipv6_address: 2001:3984:3989::12
+networks:
+  default:
+    driver: bridge
+    enable_ipv6: true
+    ipam:
+      driver: default
+      config:
+        - subnet: 172.16.238.0/24
+          gateway: 172.16.238.1
+        - subnet: 2001:3984:3989::/64
+          gateway: 2001:3984:3989::1