feat: allow altering dns entries

Allow to alter used DNS servers in 'base' module during build Signed-off-by: Stephan Wendel <me@stephanwe.de>
guysoft · Aug 12, 2024 · 3d90288 · 3d90288
1 parent d835c0e
commit 3d90288
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Showing 2 changed files with 15 additions and 3 deletions.
diff --git a/src/modules/base/config b/src/modules/base/config
@@ -85,6 +85,10 @@ fi
 
 [ -n "$BASE_OVERRIDE_HOSTNAME" ] || BASE_OVERRIDE_HOSTNAME=${DIST_NAME,,}
 
+# Alter DNS servers used during build (space seperated)
+# e.g. BASE_USE_ALT_DNS="1.1.1.1 8.8.8.8"
+[ -n "$BASE_USE_ALT_DNS" ] || BASE_USE_ALT_DNS=
+
 # a git mirror to use for git clones instead of original remotes
 [ -n "$BASE_BUILD_REPO_MIRROR" ] || BASE_BUILD_REPO_MIRROR=
 

diff --git a/src/modules/base/start_chroot_script b/src/modules/base/start_chroot_script
@@ -20,9 +20,17 @@ if [ "${BASE_DISTRO}" == "ubuntu" ]; then
   unpack /filesystem/ubuntu / root
 
   mv /etc/resolv.conf /etc/resolv.conf.orig || true
-  echo "nameserver 8.8.8.8" > /etc/resolv.conf
-  echo "nameserver 8.8.4.4" >> /etc/resolv.conf
-  echo "nameserver 1.1.1.1" >> /etc/resolv.conf
+  if [ -z "${BASE_USE_ALT_DNS}" ]; then
+    echo "nameserver 8.8.8.8" > /etc/resolv.conf
+    echo "nameserver 8.8.4.4" >> /etc/resolv.conf
+    echo "nameserver 1.1.1.1" >> /etc/resolv.conf
+  else
+    touch /etc/resolv.conf
+    for dns in ${BASE_USE_ALT_DNS}; do
+      echo "nameserver ${dns}" >> /etc/resolv.conf
+    done
+  fi
+
 
   apt-get update --allow-releaseinfo-change
   apt-get install -y net-tools wireless-tools dhcpcd5