Initialize /config from /etc, except for existing files (like bind-mounts). Move to using /config in VPP, even though there is a backwards compat symlink from /etc/{frr,bird,vpp} to /config

docker/files/etc/vpp/bootstrap.vpp

@@ -1,12 +1,13 @@
 mpls table add 0
 set ip neighbor-config ip4 age 900
 set ip neighbor-config ip6 age 900
-lcp lcp-auto-subint off
+lcp default netns dataplane
 lcp lcp-sync on
 lcp lcp-sync-unnumbered on
 lcp param del-static-on-link-down on
 lcp param del-dynamic-on-link-down on
-exec /etc/vpp/config/manual-pre.vpp
-exec /etc/vpp/config/clab.vpp
-exec /etc/vpp/config/vppcfg.vpp
-exec /etc/vpp/config/manual-post.vpp
+lcp lcp-auto-subint off
+exec /config/vpp/config/manual-pre.vpp
+exec /config/vpp/config/clab.vpp
+exec /config/vpp/config/vppcfg.vpp
+exec /config/vpp/config/manual-post.vpp

docker/files/etc/vpp/startup.conf

@@ -9,7 +9,7 @@ unix {
   cli-prompt vpp-clab#
   cli-no-pager
   poll-sleep-usec 100
-  exec /etc/vpp/bootstrap.vpp
+  exec /config/vpp/bootstrap.vpp
 }
 
 api-trace {

docker/files/init-container.sh

@@ -19,6 +19,13 @@ sed -i -e 's,^#PermitRootLogin prohibit-password,PermitRootLogin yes,' /etc/ssh/
 sed -i -e 's,^root:.*,root:$y$j9T$kG8pyZEVmwLXEtXekQCRK.$9iJxq/bEx5buni1hrC8VmvkDHRy7ZMsw9wYvwrzexID:20211::::::,' /etc/shadow
 /etc/init.d/ssh start
 
+echo "Initializing /config"
+for dir in vpp bird frr; do
+  rsync -av --ignore-existing /etc/$dir/ /config/$dir/
+  rm -rf /etc/$dir/
+  ln -s /config/$dir /etc/$dir
+done
+
 if [ "$BIRD_ENABLED" == "true" ]; then
   echo "Starting Bird in $NETNS"
   mkdir -p /run/bird /var/log/bird