feat: add Docker-based E2E test framework

Add a Python/asyncio E2E test framework that spins up 2-node exo clusters
in Docker Compose and verifies cluster formation, discovery, election, and
API health. Includes a no-internet chaos test using DNS blocking.

Co-Authored-By: Claude Opus 4.6 <[email protected]>
This commit is contained in:
Alex Cheema
2026-02-16 10:00:04 -08:00
co-authored by Claude Opus 4.6
parent 2759e92334
commit 9bcc0f968b
9 changed files with 301 additions and 0 deletions
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.venv/
.direnv/
target/
.git/
.idea/
.pytest_cache/
.ruff_cache/
dashboard/node_modules/
dashboard/.svelte-kit/
dashboard/build/
dist/
*.pdb
**/__pycache__
**/.DS_Store
.mlx_typings/
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name: e2e-tests
on:
push:
pull_request:
branches:
- staging
- main
jobs:
e2e:
runs-on: ubuntu-latest
steps:
- name: Checkout repository
uses: actions/checkout@v4
with:
lfs: false
- name: Run E2E tests
run: python3 e2e/run_all.py
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# Stage 1: Build the dashboard
FROM node:22-slim AS dashboard
WORKDIR /app/dashboard
COPY dashboard/package.json dashboard/package-lock.json ./
RUN npm ci
COPY dashboard/ .
RUN npm run build
# Stage 2: Build and run exo
FROM python:3.13-slim
# Install system dependencies
RUN apt-get update && apt-get install -y \
build-essential \
pkg-config \
libssl-dev \
curl \
protobuf-compiler \
&& rm -rf /var/lib/apt/lists/*
# Install Rust nightly
RUN curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs | sh -s -- -y --default-toolchain nightly
ENV PATH="/root/.cargo/bin:${PATH}"
# Install uv
COPY --from=ghcr.io/astral-sh/uv:latest /uv /usr/local/bin/uv
WORKDIR /app
# Copy dependency files first for better layer caching
COPY pyproject.toml Cargo.toml uv.lock README.md ./
COPY rust/ ./rust/
COPY bench/pyproject.toml ./bench/pyproject.toml
# Copy source and resources
COPY src/ ./src/
COPY resources/ ./resources/
# Copy built dashboard from stage 1
COPY --from=dashboard /app/dashboard/build ./dashboard/build/
# Install Python deps and build Rust bindings
RUN uv sync
# Wrap g++ with -fpermissive to fix MLX CPU JIT compilation with GCC 14
# (GCC 14 treats _Float128/_Float32/_Float64 as built-in types, conflicting with MLX-generated code)
RUN mv /usr/bin/g++ /usr/bin/g++.real && \
printf '#!/bin/sh\nexec /usr/bin/g++.real -fpermissive "$@"\n' > /usr/bin/g++ && \
chmod +x /usr/bin/g++
CMD [".venv/bin/exo", "-v"]
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"""Shared E2E test infrastructure for exo cluster tests."""
import asyncio
import os
import sys
from pathlib import Path
from urllib.request import urlopen
from urllib.error import URLError
E2E_DIR = Path(__file__).parent.resolve()
TIMEOUT = int(os.environ.get("E2E_TIMEOUT", "120"))
class Cluster:
"""Async wrapper around a docker compose exo cluster."""
def __init__(self, name: str, overrides: list[str] | None = None):
self.name = name
self.project = f"e2e-{name}"
compose_files = [str(E2E_DIR / "docker-compose.yml")]
for path in overrides or []:
compose_files.append(str(E2E_DIR / path))
self._compose_base = [
"docker", "compose",
"-p", self.project,
*[arg for f in compose_files for arg in ("-f", f)],
]
async def __aenter__(self):
return self
async def __aexit__(self, *exc):
await self.stop()
async def _run(self, *args: str, check: bool = True) -> str:
proc = await asyncio.create_subprocess_exec(
*self._compose_base, *args,
stdout=asyncio.subprocess.PIPE,
stderr=asyncio.subprocess.STDOUT,
)
stdout, _ = await proc.communicate()
output = stdout.decode()
if check and proc.returncode != 0:
print(output, file=sys.stderr)
raise RuntimeError(f"docker compose {' '.join(args)} failed (rc={proc.returncode})")
return output
async def build(self):
print(" Building images...")
await self._run("build", "--quiet")
async def start(self):
print(" Starting cluster...")
await self._run("up", "-d")
async def stop(self):
print(" Cleaning up...")
await self._run("down", "--timeout", "5", check=False)
async def logs(self) -> str:
return await self._run("logs", check=False)
async def wait_for(self, description: str, check_fn, timeout: int = TIMEOUT):
"""Poll check_fn every 2s until it returns True or timeout expires."""
print(f" Waiting for {description}...")
deadline = asyncio.get_event_loop().time() + timeout
while asyncio.get_event_loop().time() < deadline:
if await check_fn():
print(f" {description}")
return
await asyncio.sleep(2)
output = await self.logs()
print(f"--- cluster logs ---\n{output}\n---", file=sys.stderr)
raise TimeoutError(f"Timed out waiting for {description}")
async def assert_healthy(self):
"""Verify the cluster formed correctly: nodes started, discovered each other, elected a master, API responds."""
async def both_nodes_started():
log = await self.logs()
return log.count("Starting node") >= 2
async def nodes_discovered():
log = await self.logs()
return log.count("ConnectionMessageType.Connected") >= 2
async def master_elected():
log = await self.logs()
return "demoting self" in log
async def api_responding():
try:
with urlopen("http://localhost:52415/v1/models", timeout=3) as resp:
return resp.status == 200
except (URLError, OSError):
return False
await self.wait_for("Both nodes started", both_nodes_started)
await self.wait_for("Nodes discovered each other", nodes_discovered)
await self.wait_for("Master election resolved", master_elected)
await self.wait_for("API responding", api_responding)
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services:
exo-node-1:
build:
context: ..
dockerfile: e2e/Dockerfile
environment:
- EXO_LIBP2P_NAMESPACE=docker-e2e
command: [".venv/bin/exo", "-v"]
ports:
- "52415:52415"
exo-node-2:
build:
context: ..
dockerfile: e2e/Dockerfile
environment:
- EXO_LIBP2P_NAMESPACE=docker-e2e
command: [".venv/bin/exo", "-v"]
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#!/usr/bin/env python3
"""Discovers and runs all E2E tests in e2e/test_*.py."""
import subprocess
import sys
from pathlib import Path
E2E_DIR = Path(__file__).parent.resolve()
def main():
test_files = sorted(E2E_DIR.glob("test_*.py"))
if not test_files:
print("No test files found")
sys.exit(1)
passed = 0
failed = 0
failures = []
for test_file in test_files:
name = test_file.stem
print(f"=== {name} ===")
result = subprocess.run([sys.executable, str(test_file)])
if result.returncode == 0:
passed += 1
else:
failed += 1
failures.append(name)
print()
total = passed + failed
print("================================")
print(f"{passed}/{total} tests passed")
if failed:
print(f"Failed: {' '.join(failures)}")
sys.exit(1)
if __name__ == "__main__":
main()
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"""Test: Basic cluster formation.
Verifies two nodes discover each other, elect a master, and the API responds.
"""
import asyncio
import sys
sys.path.insert(0, str(__import__("pathlib").Path(__file__).parent))
from conftest import Cluster
async def main():
async with Cluster("cluster_formation") as cluster:
await cluster.build()
await cluster.start()
await cluster.assert_healthy()
print("PASSED: cluster_formation")
if __name__ == "__main__":
asyncio.run(main())
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"""Test: Cluster works without internet access.
Verifies exo functions correctly when containers can talk to each other
but cannot reach the internet (Docker internal network).
"""
import asyncio
import sys
sys.path.insert(0, str(__import__("pathlib").Path(__file__).parent))
from conftest import Cluster
async def main():
async with Cluster(
"no_internet",
overrides=["tests/no_internet/docker-compose.override.yml"],
) as cluster:
await cluster.build()
await cluster.start()
await cluster.assert_healthy()
print("PASSED: no_internet")
if __name__ == "__main__":
asyncio.run(main())
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# Block DNS resolution to simulate no internet access.
# mDNS discovery (multicast 224.0.0.251) still works since it doesn't use DNS.
# Docker's "internal: true" can't be used here because it also blocks multicast.
services:
exo-node-1:
dns: 0.0.0.0
exo-node-2:
dns: 0.0.0.0