fix: use ln -sf instead of update-alternatives --set

update-alternatives fails because iptables-nft isn't registered as an alternative key (only iptables-legacy was registered by the official Dockerfile). Direct symlink override works.
fix: remove apk add iptables-nft — built-in on Alpine 3.18+
2026-05-13 12:57:12 -04:00 · 2026-05-13 12:48:51 -04:00 · 2026-05-13 16:37:35 +00:00
1 changed files with 5 additions and 6 deletions
--- a/vpn/Dockerfile
+++ b/vpn/Dockerfile
@@ -2,9 +2,8 @@
 # Fixes crash-loop when host kernel lacks legacy iptable_nat module.
 FROM ghcr.io/wg-easy/wg-easy:latest

-# The upstream image defaults to iptables-legacy via update-alternatives.
-# Switch to iptables-nft so it works on kernels where only nftables
-# netfilter modules are available (iptable_nat module missing).
-RUN apk add --no-cache iptables-nft && \
-    update-alternatives --set iptables /usr/sbin/iptables-nft && \
-    update-alternatives --set ip6tables /usr/sbin/ip6tables-nft
+# The upstream image registers only iptables-legacy with update-alternatives.
+# iptables-nft binary exists but isn't registered as an alternative.
+# Override the alternatives-managed symlinks directly.
+RUN ln -sf /usr/sbin/iptables-nft /usr/sbin/iptables && \
+    ln -sf /usr/sbin/ip6tables-nft /usr/sbin/ip6tables
Author	SHA1	Message	Date
Hermes	7e2b133946	fix: use ln -sf instead of update-alternatives --set update-alternatives fails because iptables-nft isn't registered as an alternative key (only iptables-legacy was registered by the official Dockerfile). Direct symlink override works.	2026-05-13 12:57:12 -04:00
Hermes	611e96b306	fix: remove apk add iptables-nft — built-in on Alpine 3.18+ In Alpine 3.18+, the 'iptables' package IS the nftables variant. iptables-nft is not a separate package. The binary is already in the base image — only need to flip update-alternatives.	2026-05-13 12:48:51 -04:00
Thierry Pouplier	f184ed957c	Merge pull request 'fix: update wg-easy to official ghcr image with iptables-nft' (#26 ) from fix/vpn-iptables-nft-upstream into master Reviewed-on: #26	2026-05-13 16:37:35 +00:00