Docker Isolation: Namespace Restrictions & Read-Only Mounts
Decrypting tools/environments/docker.py Namespace security policies & Capabilities filtering
📊 Fig 9-2-1: Standard I/O redirection, host directory mount & Docker container sandbox boundary diagram
🔒 1. docker.py Read-Only Volume & Namespace Security
In tools/environments/docker.py, to prevent malicious code from compromising the host, the system implements extremely stringent security filtering. The host Workspace is mounted as read-only (ro) into the container, and Linux PID, IPC, and NET namespaces isolate the container from discovering the host's LAN topology.
📊 Fig 9-2-2: Host sandbox controller and isolated environment (PTY master-slave devices) bidirectional redirection pipeline diagram
🛡️ 2. Linux Capabilities Lockdown
The system strips almost all root system call capabilities from the container at Docker startup (e.g., --cap-drop=ALL), eliminating sandbox escape and unauthorized network device control risks.