tailscaled does not reliably enable IPv6 forwarding inside a container
network namespace ('IPv6 forwarding is disabled'), so advertised IPv6
subnet routes silently fail. Add a tiny entrypoint.sh that sets
net.ipv4.ip_forward and net.ipv6.conf.all.forwarding (writable inside a
RouterOS container netns), then exec's tailscaled. Built in the builder
stage so it stays in the single /usr/local/bin COPY layer.
Verified: privileged run flips v6 forwarding 0->1 and exec's tailscaled
with CMD args intact.
Without ipnbus, 'tailscale up' fires config at the daemon and returns
immediately ('built with ts_omit_ipnbus; not waiting for completion')
without printing the auth URL or confirming success. Add it to the
allowlist so interactive 'up' behaves normally.
Add .woodpecker/pr-build.yaml: builds all three arches (dry-run, no push)
on PRs and pushes to main, reporting status to Gitea. This is the gate
for automerge.
renovate.json automerge rules (platformAutomerge, merged only after the
PR build passes):
- tailscale stable patch AND minor
- Go/Alpine/busybox PATCH only
- base-image digest refreshes
Minor/major of build deps and tooling stay manual.
Move pinDigests into a dockerfile packageRule (top-level dockerfile.* is
deprecated). Document the automerge policy and its caveat (PR build proves
build-only, not runtime) in DESIGN.md.
The ~7 MB seen via 'du' inside the container is RouterOS block-allocation
rounding (a 3 MB file occupies ~6 MB of blocks), NOT layer duplication —
verified: the published image carries tailscale.combined in exactly one
layer, and the real flash cost is ~3.7 MiB (free-hdd-space delta).
Fix the docs to measure on-flash footprint via free-hdd-space delta, not
du; clarify the overlayfs section is about keeping the image clean (still
valid best practice) and explicitly decouple it from the du number.
The --extra-small baseline omits unixsocketidentity, but without it the
localapi cannot verify a request came over the trusted unix socket, so
PermitRead/PermitWrite are always false and every CLI call (status, up,
set, ...) returns 'access denied' (tailscale/tailscale#17873). Add it to
the opt-in allowlist. Negligible size cost (~3.55 MB unchanged); the CLI
is non-functional without it.
README shrinks to a repo intro with pointers. Separate the three
audiences:
- docs/USAGE.md deploy the prebuilt image on RouterOS + operate it
- docs/DEVELOPMENT.md build, local test, version bump, cut releases
- docs/DESIGN.md size optimizations, feature allowlist, why the
updater and netmap disk-cache are removed, flash-wear
protection, versioning/release architecture, the
overlayfs layer-duplication gotcha, dependency pinning
Lumpiasty
