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Podman in Podman #6

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Podman in Podman #6

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15 changes: 13 additions & 2 deletions src/claude_isolated/cli.py
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Original file line number Diff line number Diff line change
Expand Up @@ -152,6 +152,13 @@ def cmd_start(args: argparse.Namespace) -> None:
*[flag for src, dest, mode in volumes for flag in ("-v", f"{src}:{dest}:{mode}")],
]

if args.podman:
run_args += [
"--device", "/dev/fuse",
"--security-opt", "label=disable",
"--security-opt", "unmask=ALL",
]

if wt.is_worktree:
run_args += ["-w", workspace_mount]

Expand Down Expand Up @@ -200,11 +207,14 @@ def cmd_ls(args: argparse.Namespace) -> None:
def main() -> None:
# If first arg isn't a subcommand, treat as default: build + start [prompt]
if not sys.argv[1:] or sys.argv[1] not in SUBCOMMANDS:
prompt = " ".join(sys.argv[1:]) if len(sys.argv) > 1 else ""
# Parse --podman flag from argv before treating rest as prompt
use_podman = "--podman" in sys.argv[1:]
remaining = [a for a in sys.argv[1:] if a != "--podman"]
prompt = " ".join(remaining)
with spinner("Building Containerfile.."):
cmd_build(argparse.Namespace(), silent=True)
print(f'\r✔ Running Claude Code in bypass permissions mode..')
cmd_start(argparse.Namespace(prompt=prompt))
cmd_start(argparse.Namespace(prompt=prompt, podman=use_podman))
return

parser = argparse.ArgumentParser(description="Run Claude Code in isolated Podman containers")
Expand All @@ -215,6 +225,7 @@ def main() -> None:
sub.add_parser("build", help="Build the container image")

p_start = sub.add_parser("start", help="Start a new container")
p_start.add_argument("--podman", action="store_true", help="Enable nested Podman inside the container")
p_start.add_argument("prompt", nargs="?", default="", help="Optional prompt for Claude")

p_stop = sub.add_parser("stop", help="Stop and remove a container")
Expand Down
17 changes: 16 additions & 1 deletion src/claude_isolated/data/Containerfile
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Expand Up @@ -24,13 +24,28 @@ RUN echo "deb http://deb.debian.org/debian sid main" \
&& apt-get install -y --no-install-recommends -t sid git \
&& rm -rf /var/lib/apt/lists/*

# Create non-root user
# Podman-in-Podman: nested rootless container support
RUN apt-get update && apt-get install -y --no-install-recommends \
podman \
fuse-overlayfs \
slirp4netns \
uidmap \
&& rm -rf /var/lib/apt/lists/*

# Create non-root user with subordinate UID/GID ranges for nested podman
RUN useradd -m -d /home/claude -s /bin/bash claude
RUN echo "claude:100000:65536" >> /etc/subuid \
&& echo "claude:100000:65536" >> /etc/subgid
RUN mkdir -p /home/claude/.claude /workspace \
&& chown -R claude:claude /home/claude /workspace

USER claude

# Configure rootless podman storage (fuse-overlayfs inside container)
RUN mkdir -p /home/claude/.config/containers \
&& printf '[storage]\ndriver = "overlay"\n\n[storage.options.overlay]\nmount_program = "/usr/bin/fuse-overlayfs"\n' \
> /home/claude/.config/containers/storage.conf

# Install uv
ARG UV_VERSION=0.10.11
RUN curl -LsSf https://astral.sh/uv/${UV_VERSION}/install.sh | sh
Expand Down