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BUILDING.md

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Building RootlessKit

This document describes build-time options, including Go build tags for omitting certain network and port drivers.

Build tags to omit drivers

To exclude specific drivers at compilation time, use Go build tags:

  • Tag no_vpnkit: omits the VPNKit network driver implementation.
  • Tag no_gvisortapvsock: omits the gvisor-tap-vsock network driver implementation and its port driver.
  • Tag no_slirp4netns: omits the slirp4netns network driver implementation and its port driver.
  • Tag no_lxcusernic: omits the lxc-user-nic network driver implementation.

Example:

  • Build without VPNKit support: go build -tags no_vpnkit ./cmd/rootlesskit

Notes:

  • If a disabled driver is selected at runtime (e.g., --net=vpnkit when built with -tags no_vpnkit), RootlessKit returns an error indicating that the driver was disabled at build time.
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