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feat(deploy): cake.env template with documented uplink knobs

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Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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mwiegand 2026-05-10 00:49:08 +02:00
parent fbb342db87
commit d783449d05
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12
deploy/files/etc/left4me/cake.env Normal file
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@ -0,0 +1,12 @@
# left4me — CAKE egress shaper config. Consumed by left4me-cake.service via
# its EnvironmentFile=. Edit then `systemctl restart left4me-cake.service`.
# See docs/superpowers/specs/2026-05-10-l4d2-network-shaping-design.md.
# Uplink bandwidth in Mbit/s. Set to ~95% of the smaller of measured upload
# and measured download. CAKE only shapes correctly when its declared
# bandwidth sits below the real bottleneck. If unset, the shaper unit logs
# a warning and exits 0 (no shaping).
LEFT4ME_UPLINK_MBIT=
# Egress interface. If unset, auto-detected from the IPv4 default route.
LEFT4ME_UPLINK_IFACE=

14
deploy/tests/test_deploy_artifacts.py
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@ -21,6 +21,7 @@ JOURNALCTL_HELPER = DEPLOY / "files/usr/local/libexec/left4me/left4me-journalctl
OVERLAY_HELPER = DEPLOY / "files/usr/local/libexec/left4me/left4me-overlay" OVERLAY_HELPER = DEPLOY / "files/usr/local/libexec/left4me/left4me-overlay"
SCRIPT_SANDBOX_HELPER = DEPLOY / "files/usr/local/libexec/left4me/left4me-script-sandbox" SCRIPT_SANDBOX_HELPER = DEPLOY / "files/usr/local/libexec/left4me/left4me-script-sandbox"
SANDBOX_RESOLV_CONF = DEPLOY / "files/etc/left4me/sandbox-resolv.conf" SANDBOX_RESOLV_CONF = DEPLOY / "files/etc/left4me/sandbox-resolv.conf"
CAKE_ENV = DEPLOY / "files/etc/left4me/cake.env"
SUDOERS = DEPLOY / "files/etc/sudoers.d/left4me" SUDOERS = DEPLOY / "files/etc/sudoers.d/left4me"
HOST_ENV = DEPLOY / "templates/etc/left4me/host.env" HOST_ENV = DEPLOY / "templates/etc/left4me/host.env"
WEB_ENV_TEMPLATE = DEPLOY / "templates/etc/left4me/web.env.template" WEB_ENV_TEMPLATE = DEPLOY / "templates/etc/left4me/web.env.template"
@ -756,3 +757,16 @@ def test_nft_mark_unit_loads_and_clears_left4me_table():
) )
assert "ExecStop=/usr/sbin/nft delete table inet left4me_mark" in text assert "ExecStop=/usr/sbin/nft delete table inet left4me_mark" in text
assert "WantedBy=multi-user.target" in text assert "WantedBy=multi-user.target" in text
def test_cake_env_template_documents_required_knobs():
assert CAKE_ENV.is_file()
text = CAKE_ENV.read_text()
# Both knobs are documented and present (commented OK; the deploy preserves
# operator edits, so the template must not bake in a wrong value).
assert "LEFT4ME_UPLINK_MBIT" in text
assert "LEFT4ME_UPLINK_IFACE" in text
# Empty defaults: shaper unit no-ops with a journal warning when unset.
assert "LEFT4ME_UPLINK_MBIT=" in text
assert "LEFT4ME_UPLINK_IFACE=" in text