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## Summary - leave the default contributor devcontainer on its lightweight platform-only Docker runtime - install bubblewrap in setuid mode only in the secure devcontainer image for running Codex inside Docker - add Docker run args to the secure profile for bubblewrap's required capabilities - use explicit `seccomp=unconfined` and `apparmor=unconfined` in the secure profile instead of shipping a custom seccomp profile - document that the relaxed Docker security options are scoped to the secure profile ## Why Docker's default seccomp profile blocks bubblewrap with `pivot_root: Operation not permitted`, even when the container has `CAP_SYS_ADMIN`. Docker's default AppArmor profile also blocks bubblewrap with `Failed to make / slave: Permission denied`. A custom seccomp profile works, but it is hard for customers to audit and understand. Using Docker's standard `seccomp=unconfined` option is clearer: the secure profile intentionally relaxes Docker's outer sandbox just enough for Codex to construct its own bubblewrap/seccomp sandbox inside the container. The default contributor profile does not get these expanded runtime settings. ## Validation - `sed '/\\/\\*/,/\\*\\//d' .devcontainer/devcontainer.json | jq empty` - `jq empty .devcontainer/devcontainer.secure.json` - `git diff --check` - `docker build --platform=linux/arm64 -t codex-devcontainer-bwrap-test-arm64 ./.devcontainer` - `docker build --platform=linux/arm64 -f .devcontainer/Dockerfile.secure -t codex-devcontainer-secure-bwrap-test-arm64 .` - interactive `docker run -it` smoke tests: - verified non-root users `ubuntu` and `vscode` - verified secure image `/usr/bin/bwrap` is setuid - verified user/pid namespace, user/network namespace, and preserved-fd `--ro-bind-data` bwrap commands - reran secure-image smoke test with simplified `seccomp=unconfined` setup: - `bwrap-basic-ok` - `bwrap-netns-ok` - `codex-ok` - ran Codex inside the secure image: - `codex --version` -> `codex-cli 0.120.0` - `codex sandbox linux --full-auto -- /bin/sh -lc '...'` -> exited 0 and printed `codex-inner-ok` Note: direct `bwrap --proc /proc` is still denied by this Docker runtime, and Codex's existing proc-mount preflight fallback handles that by retrying without `--proc`. --------- Co-authored-by: Codex <noreply@openai.com>
1288bb60a1
·
2026-04-12 10:49:50 -07:00
5,286 Commits
npm i -g @openai/codex
or brew install --cask codex
Codex CLI is a coding agent from OpenAI that runs locally on your computer.
If you want Codex in your code editor (VS Code, Cursor, Windsurf), install in your IDE.
If you want the desktop app experience, run
codex app or visit the Codex App page.
If you are looking for the cloud-based agent from OpenAI, Codex Web, go to chatgpt.com/codex.
Quickstart
Installing and running Codex CLI
Install globally with your preferred package manager:
# Install using npm
npm install -g @openai/codex
# Install using Homebrew
brew install --cask codex
Then simply run codex to get started.
You can also go to the latest GitHub Release and download the appropriate binary for your platform.
Each GitHub Release contains many executables, but in practice, you likely want one of these:
- macOS
- Apple Silicon/arm64:
codex-aarch64-apple-darwin.tar.gz - x86_64 (older Mac hardware):
codex-x86_64-apple-darwin.tar.gz
- Apple Silicon/arm64:
- Linux
- x86_64:
codex-x86_64-unknown-linux-musl.tar.gz - arm64:
codex-aarch64-unknown-linux-musl.tar.gz
- x86_64:
Each archive contains a single entry with the platform baked into the name (e.g., codex-x86_64-unknown-linux-musl), so you likely want to rename it to codex after extracting it.
Using Codex with your ChatGPT plan
Run codex and select Sign in with ChatGPT. We recommend signing into your ChatGPT account to use Codex as part of your Plus, Pro, Business, Edu, or Enterprise plan. Learn more about what's included in your ChatGPT plan.
You can also use Codex with an API key, but this requires additional setup.
Docs
This repository is licensed under the Apache-2.0 License.